David B. Collum - Publications

Affiliations: 
Cornell University, Ithaca, NY, United States 
Area:
organolithium reagents
Website:
http://chemistry.cornell.edu/faculty/detail.cfm?netid=dbc6

151 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2019 Zhou Y, Keresztes I, MacMillan SN, Collum DB. Disodium Salts of Pseudoephedrine-Derived Myers Enolates: Stereoselectivity and Mechanism of Alkylation. Journal of the American Chemical Society. 141: 16865-16876. PMID 31613094 DOI: 10.1021/jacs.9b08176  0.52
2019 Gladfelder J, Ghosh S, Podunavac M, Cook AW, Ma Y, Woltornist RA, Keresztes I, Hayton TW, Collum DB, Zakarian A. Enantioselective Alkylation of 2-Alkyl Pyridines Controlled by Organolithium Aggregation. Journal of the American Chemical Society. PMID 31460756 DOI: 10.1021/jacs.9b08659  0.64
2019 Ma Y, Algera RF, Woltornist RA, Collum DB. Sodium Diisopropylamide-Mediated Dehydrohalogenations: Influence of Primary- and Secondary-Shell Solvation. The Journal of Organic Chemistry. PMID 31436099 DOI: 10.1021/acs.joc.9b01428  0.64
2019 Zhang Z, Collum DB. Wittig Rearrangements of Boron-Based Oxazolidinone Enolates. The Journal of Organic Chemistry. PMID 31414796 DOI: 10.1021/acs.joc.9b01426  0.52
2019 Ma Y, Woltornist RA, Algera RF, Collum DB. Aryl Carbamates: Mechanisms of Orthosodiations and Snieckus-Fries Rearrangements. The Journal of Organic Chemistry. PMID 31257864 DOI: 10.1021/acs.joc.9b00968  0.64
2019 Zhou Y, Jermaks J, Keresztes I, MacMillan SN, Collum DB. Pseudophedrine-Derived Myers Enolates: Structures and Influence of Lithium Chloride on Reactivity and Mechanism. Journal of the American Chemical Society. PMID 30896939 DOI: 10.1021/jacs.9b00328  0.52
2018 Zhang Z, Collum DB. Structures and Reactivities of Sodiated Evans Enolates: Role of Solvation and Mixed Aggregation on the Stereochemistry and Mechanism of Alkylations. Journal of the American Chemical Society. PMID 30462500 DOI: 10.1021/jacs.8b10364  0.52
2018 Jermaks J, Tallmadge EH, Keresztes I, Collum DB. Lithium Amino Alkoxide-Evans Enolate Mixed Aggregates: Aldol Addition with Matched and Mismatched Stereocontrol. Journal of the American Chemical Society. PMID 29457718 DOI: 10.1021/jacs.7b13776  0.52
2017 Algera RF, Ma Y, Collum DB. Sodium Diisopropylamide in Tetrahydrofuran: Selectivities, Rates, and Mechanisms of Arene Metalations. Journal of the American Chemical Society. PMID 28946744 DOI: 10.1021/jacs.7b08734  0.64
2017 Algera RF, Ma Y, Collum DB. Sodium Diisopropylamide in Tetrahydrofuran: Selectivities, Rates, and Mechanisms of Alkene Isomerizations and Diene Metalations. Journal of the American Chemical Society. PMID 28735535 DOI: 10.1021/jacs.7b05218  0.64
2017 Zhang Z, Collum DB. Evans Enolates: Structures and Mechanisms Underlying the Aldol Addition of Oxazolidinone-Derived Boron Enolates. The Journal of Organic Chemistry. PMID 28686020 DOI: 10.1021/acs.joc.7b01365  0.52
2017 Algera RF, Ma Y, Collum DB. Sodium Diisopropylamide: Aggregation, Solvation, and Stability. Journal of the American Chemical Society. PMID 28557426 DOI: 10.1021/jacs.7b03061  0.64
2017 Algera RF, Gupta L, Hoepker AC, Liang J, Ma Y, Singh KJ, Collum DB. Lithium Diisopropylamide: Nonequilibrium Kinetics and Lessons Learned about Rate Limitation. The Journal of Organic Chemistry. PMID 28368117 DOI: 10.1021/acs.joc.6b03083  1
2017 Reyes-Rodríguez GJ, Algera RF, Collum DB. Lithium Hexamethyldisilazide-Mediated Enolization of Acylated Oxazolidinones: Solvent, Cosolvent, and Isotope Effects on Competing Monomer- and Dimer-Based Pathways. Journal of the American Chemical Society. PMID 28080036 DOI: 10.1021/jacs.6b11354  0.48
2016 Yu K, Lu P, Jackson JJ, Nguyen TD, Alvarado J, Stivala CE, Ma Y, Mack KA, Hayton TW, Collum DB, Zakarian A. Lithium Enolates in the Enantioselective Construction of Tetrasubstituted Carbon Centers with Chiral Lithium Amides as Noncovalent Stereodirecting Auxiliaries. Journal of the American Chemical Society. PMID 27997174 DOI: 10.1021/jacs.6b11673  0.64
2016 Ma Y, Algera RF, Collum DB. Sodium Diisopropylamide in N,N-Dimethylethylamine: Reactivity, Selectivity, and Synthetic Utility. The Journal of Organic Chemistry. PMID 27768310 DOI: 10.1021/acs.joc.6b02287  0.64
2016 Houghton MJ, Huck CJ, Wright SW, Collum DB. Lithium Enolates Derived from Pyroglutaminol: Mechanism and Stereoselectivity of an Azaaldol Addition. Journal of the American Chemical Society. PMID 27500546 DOI: 10.1021/jacs.6b05481  1
2016 Ma Y, Mack KA, Liang J, Keresztes I, Collum DB, Zakarian A. Mixed Aggregates of the Dilithiated Koga Tetraamine: NMR Spectroscopic and Computational Studies. Angewandte Chemie (International Ed. in English). PMID 27435147 DOI: 10.1002/anie.201605199  0.64
2016 Houghton MJ, Biok NA, Huck CJ, Algera RF, Keresztes I, Wright SW, Collum DB. Lithium Enolates Derived from Pyroglutaminol: Aggregation, Solvation, and Atropisomerism. The Journal of Organic Chemistry. PMID 27035057 DOI: 10.1021/acs.joc.6b00459  1
2015 Jin KJ, Collum DB. Solid-State and Solution Structures of Glycinimine-Derived Lithium Enolates. Journal of the American Chemical Society. PMID 26554898 DOI: 10.1021/jacs.5b09524  1
2015 Tallmadge EH, Collum DB. Evans Enolates: Solution Structures of Lithiated Oxazolidinone-Derived Enolates. Journal of the American Chemical Society. 137: 13087-95. PMID 26437278 DOI: 10.1021/jacs.5b08207  1
2015 Liang J, Hoepker AC, Algera RF, Ma Y, Collum DB. Mechanism of Lithium Diisopropylamide-Mediated Ortholithiation of 1,4-Bis(trifluoromethyl)benzene under Nonequilibrium Conditions: Condition-Dependent Rate Limitation and Lithium Chloride-Catalyzed Inhibition. Journal of the American Chemical Society. 137: 6292-303. PMID 25900574 DOI: 10.1021/jacs.5b01668  1
2014 Han Y, Ma Y, Keresztes I, Collum DB, Corey EJ. Preferential geminal bis-silylation of 3,4-benzothiophane is caused by the dominance of electron withdrawal by R3Si over steric shielding effects. Organic Letters. 16: 4678-9. PMID 25157594 DOI: 10.1021/ol502348y  1
2014 Liang J, Hoepker AC, Bruneau AM, Ma Y, Gupta L, Collum DB. Lithium diisopropylamide-mediated lithiation of 1,4-difluorobenzene under nonequilibrium conditions: role of monomer-, dimer-, and tetramer-based intermediates and lessons about rate limitation. The Journal of Organic Chemistry. 79: 11885-902. PMID 25000303 DOI: 10.1021/jo501392r  1
2014 Tomasevich LL, Collum DB. Method of continuous variation: characterization of alkali metal enolates using ¹H and ¹⁹F NMR spectroscopies. Journal of the American Chemical Society. 136: 9710-8. PMID 24915602 DOI: 10.1021/ja504365z  1
2014 Bruneau AM, Liou L, Collum DB. Solution structures of lithium amino alkoxides used in highly enantioselective 1,2-additions. Journal of the American Chemical Society. 136: 2885-91. PMID 24471766 DOI: 10.1021/ja412210d  1
2013 Renny JS, Tomasevich LL, Tallmadge EH, Collum DB. Method of continuous variations: applications of job plots to the study of molecular associations in organometallic chemistry. Angewandte Chemie (International Ed. in English). 52: 11998-2013. PMID 24166797 DOI: 10.1002/anie.201304157  1
2013 Tomasevich LL, Collum DB. Structure determination using the method of continuous variation: lithium phenolates solvated by protic and dipolar aprotic ligands. The Journal of Organic Chemistry. 78: 7498-507. PMID 23806055 DOI: 10.1021/jo401080n  1
2013 Ma Y, Stivala CE, Wright AM, Hayton T, Liang J, Keresztes I, Lobkovsky E, Collum DB, Zakarian A. Enediolate-dilithium amide mixed aggregates in the enantioselective alkylation of arylacetic acids: structural studies and a stereochemical model. Journal of the American Chemical Society. 135: 16853-64. PMID 23654300 DOI: 10.1021/ja403076u  1
2013 De Vries TS, Bruneau AM, Liou LR, Subramanian H, Collum DB. Azaaldol condensation of a lithium enolate solvated by N,N,N',N'-tetramethylethylenediamine: dimer-based 1,2-addition to imines. Journal of the American Chemical Society. 135: 4103-9. PMID 23413774 DOI: 10.1021/ja400345c  1
2013 Gupta L, Hoepker AC, Ma Y, Viciu MS, Faggin MF, Collum DB. Lithium diisopropylamide-mediated ortholithiation of 2-fluoropyridines: rates, mechanisms, and the role of autocatalysis. The Journal of Organic Chemistry. 78: 4214-30. PMID 23270408 DOI: 10.1021/jo302408r  1
2011 Hoepker AC, Collum DB. Computational studies of lithium diisopropylamide deaggregation. The Journal of Organic Chemistry. 76: 7985-93. PMID 21888365 DOI: 10.1021/jo2015642  1
2011 Hoepker AC, Gupta L, Ma Y, Faggin MF, Collum DB. Regioselective lithium diisopropylamide-mediated ortholithiation of 1-chloro-3-(trifluoromethyl)benzene: role of autocatalysis, lithium chloride catalysis, and reversibility. Journal of the American Chemical Society. 133: 7135-51. PMID 21500823 DOI: 10.1021/ja200906z  1
2010 Gupta L, Ramírez A, Collum DB. Reaction of lithium diethylamide with an alkyl bromide and alkyl benzenesulfonate: origins of alkylation, elimination, and sulfonation. The Journal of Organic Chemistry. 75: 8392-9. PMID 21077695 DOI: 10.1021/jo101505x  1
2010 Ma Y, Hoepker AC, Gupta L, Faggin MF, Collum DB. 1,4-addition of lithium diisopropylamide to unsaturated esters: role of rate-limiting deaggregation, autocatalysis, lithium chloride catalysis, and other mixed aggregation effects. Journal of the American Chemical Society. 132: 15610-23. PMID 20961095 DOI: 10.1021/ja105855v  1
2010 Gruver JM, West SP, Collum DB, Sarpong R. Experimental characterization and computational study of unique C,N-chelated lithium dianions. Journal of the American Chemical Society. 132: 13212-3. PMID 20822143 DOI: 10.1021/ja106852n  1
2010 Viciu MS, Gupta L, Collum DB. Mechanism of lithium diisopropylamide-mediated substitution of 2,6-difluoropyridine. Journal of the American Chemical Society. 132: 6361-5. PMID 20397635 DOI: 10.1021/ja910834b  1
2009 De Vries TS, Goswami A, Liou LR, Gruver JM, Jayne E, Collum DB. Lithium phenolates solvated by tetrahydrofuran and 1,2-dimethoxyethane: structure determination using the method of continuous variation. Journal of the American Chemical Society. 131: 13142-54. PMID 19702308 DOI: 10.1021/ja9047784  1
2009 Gupta L, Hoepker AC, Singh KJ, Collum DB. Lithium diisopropylamide-mediated ortholithiations: lithium chloride catalysis. The Journal of Organic Chemistry. 74: 2231-3. PMID 19191711 DOI: 10.1021/jo802713y  1
2008 Liou LR, McNeil AJ, Toombes GE, Collum DB. Structures of beta-amino ester enolates: new strategies using the method of continuous variation. Journal of the American Chemical Society. 130: 17334-41. PMID 19090750 DOI: 10.1021/ja8016957  1
2008 Singh KJ, Hoepker AC, Collum DB. Autocatalysis in lithium diisopropylamide-mediated ortholithiations. Journal of the American Chemical Society. 130: 18008-17. PMID 19053473 DOI: 10.1021/ja807331k  1
2008 Riggs JC, Singh KJ, Yun M, Collum DB. Anionic Snieckus-Fries rearrangement: solvent effects and role of mixed aggregates. Journal of the American Chemical Society. 130: 13709-17. PMID 18798619 DOI: 10.1021/ja804087r  1
2008 Gruver JM, Liou LR, McNeil AJ, Ramirez A, Collum DB. Solution structures of lithium enolates, phenolates, carboxylates, and alkoxides in the presence of N,N,N',N'-tetramethylethylenediamine: a prevalence of cyclic dimers. The Journal of Organic Chemistry. 73: 7743-7. PMID 18781812 DOI: 10.1021/jo801532d  1
2008 Ma Y, Breslin S, Keresztes I, Lobkovsky E, Collum DB. Synthesis of a 7-azaindole by chichibabin cyclization: reversible base-mediated dimerization of 3-picolines. The Journal of Organic Chemistry. 73: 9610-8. PMID 18707175 DOI: 10.1021/jo801410s  1
2008 Godenschwager PF, Collum DB. Lithium hexamethyldisilazide-mediated enolizations: influence of triethylamine on E/Z selectivities and enolate reactivities. Journal of the American Chemical Society. 130: 8726-32. PMID 18557616 DOI: 10.1021/ja800250q  1
2008 Liou LR, McNeil AJ, Ramirez A, Toombes GE, Gruver JM, Collum DB. Lithium enolates of simple ketones: structure determination using the method of continuous variation. Journal of the American Chemical Society. 130: 4859-68. PMID 18336025 DOI: 10.1021/ja7100642  1
2008 Riggs JC, Ramirez A, Cremeens ME, Bashore CG, Candler J, Wirtz MC, Coe JW, Collum DB. Structural and rate studies of the formation of substituted benzynes. Journal of the American Chemical Society. 130: 3406-12. PMID 18293971 DOI: 10.1021/ja0754655  1
2007 Ma Y, Collum DB. Lithium diisopropylamide-mediated reactions of imines, unsaturated esters, epoxides, and aryl carbamates: influence of hexamethylphosphoramide and ethereal cosolvents on reaction mechanisms. Journal of the American Chemical Society. 129: 14818-25. PMID 17985891 DOI: 10.1021/ja074554e  1
2007 Godenschwager PF, Collum DB. Lithium hexamethyldisilazide-mediated enolizations: influence of chelating ligands and hydrocarbon cosolvents on the rates and mechanisms. Journal of the American Chemical Society. 129: 12023-31. PMID 17850084 DOI: 10.1021/ja074018m  1
2007 Collum DB, McNeil AJ, Ramirez A. Lithium diisopropylamide: solution kinetics and implications for organic synthesis. Angewandte Chemie (International Ed. in English). 46: 3002-17. PMID 17387670 DOI: 10.1002/anie.200603038  1
2007 Chadwick ST, Ramirez A, Gupta L, Collum DB. n-Butyllithium/N,N,N',N'-tetramethylethylenediamine-mediated ortholithiations of aryl oxazolines: substrate-dependent mechanisms. Journal of the American Chemical Society. 129: 2259-68. PMID 17269777 DOI: 10.1021/ja068057u  1
2006 Ma Y, Ramirez A, Singh KJ, Keresztes I, Collum DB. Lithium diisopropylamide solvated by hexamethylphosphoramide: substrate-dependent mechanisms for dehydrobrominations. Journal of the American Chemical Society. 128: 15399-404. PMID 17132006 DOI: 10.1021/ja060964b  1
2006 Singh KJ, Collum DB. Lithium diisopropylamide-mediated ortholithiation and anionic fries rearrangement of aryl carbamates: role of aggregates and mixed aggregates. Journal of the American Chemical Society. 128: 13753-60. PMID 17044703 DOI: 10.1021/ja064655x  1
2006 Qu B, Collum DB. Mechanism of acylation of lithium phenylacetylide with a Weinreb amide. The Journal of Organic Chemistry. 71: 7117-9. PMID 16930080 DOI: 10.1021/jo061223w  1
2006 Ramirez A, Sun X, Collum DB. Lithium diisopropylamide-mediated enolization: catalysis by hemilabile ligands. Journal of the American Chemical Society. 128: 10326-36. PMID 16881665 DOI: 10.1021/ja062147h  1
2006 Qu B, Collum DB. Structure of n-butyllithium in mixtures of ethers and diamines: influence of mixed solvation on 1,2-additions to imines. Journal of the American Chemical Society. 128: 9355-60. PMID 16848470 DOI: 10.1021/ja0609654  1
2006 Zuend SJ, Ramirez A, Lobkovsky E, Collum DB. Lithiated imines: solvent-dependent aggregate structures and mechanisms of alkylation. Journal of the American Chemical Society. 128: 5939-48. PMID 16637662 DOI: 10.1021/ja060363k  1
2005 Qu B, Collum DB. Addition of n-butyllithium to an aldimine: role of chelation, aggregation, and cooperative solvation. Journal of the American Chemical Society. 127: 10820-1. PMID 16076174 DOI: 10.1021/ja0519987  1
2005 McNeil AJ, Collum DB. Reversible enolization of beta-amino carboxamides by lithium hexamethyldisilazide. Journal of the American Chemical Society. 127: 5655-61. PMID 15826205 DOI: 10.1021/ja043470s  1
2005 Ma Y, Lobkovsky E, Collum DB. BF3-mediated additions of organolithiums to ketimines: X-ray crystal structures of BF3-ketimine complexes. The Journal of Organic Chemistry. 70: 2335-7. PMID 15760225 DOI: 10.1021/jo0480895  1
2005 Ma Y, Collum DB. Rate studies of metalation of imine by diisopropylamide solvated by hexamethylphosphoramide and tetrahydrofuran Acs National Meeting Book of Abstracts. 230.  1
2004 McNeil AJ, Toombes GE, Gruner SM, Lobkovsky E, Collum DB, Chandramouli SV, Vanasse BJ, Ayers TA. Diastereoselective alkylation of beta-amino esters: structural and rate studies reveal alkylations of hexameric lithium enolates. Journal of the American Chemical Society. 126: 16559-68. PMID 15600361 DOI: 10.1021/ja045144i  1
2004 Ramírez A, Candler J, Bashore CG, Wirtz MC, Coe JW, Collum DB. Formation of benzynes from 2,6-dihaloaryllithiums: mechanistic basis of the regioselectivity. Journal of the American Chemical Society. 126: 14700-1. PMID 15535677 DOI: 10.1021/ja044899m  1
2004 McNeil AJ, Toombes GE, Chandramouli SV, Vanasse BJ, Ayers TA, O'Brien MK, Lobkovsky E, Gruner SM, Marohn JA, Collum DB. Characterization of beta-amino ester enolates as hexamers via 6Li NMR spectroscopy. Journal of the American Chemical Society. 126: 5938-9. PMID 15137738 DOI: 10.1021/ja049245s  1
2004 Briggs TF, Winemiller MD, Collum DB, Parsons RL, Davulcu AH, Harris GD, Fortunak JM, Confalone PN. Structural and rate studies of the 1,2-additions of lithium phenylacetylide to lithiated quinazolinones: influence of mixed aggregates on the reaction mechanism. Journal of the American Chemical Society. 126: 5427-35. PMID 15113214 DOI: 10.1021/ja0305813  1
2004 Zhao P, Condo A, Keresztes I, Collum DB. Reaction of ketones with lithium hexamethyldisilazide: competitive enolizations and 1,2-additions. Journal of the American Chemical Society. 126: 3113-8. PMID 15012141 DOI: 10.1021/ja030582v  1
2004 Zhao P, Lucht BL, Kenkre SL, Collum DB. Lithium hexamethyldisilazide-mediated ketone enolization: the influence of hindered dialkyl ethers and isostructural dialkylamines on reaction rates and mechanisms. The Journal of Organic Chemistry. 69: 242-9. PMID 14725435 DOI: 10.1021/jo030221y  1
2004 Trivedi HK, Massey ML, Bhattacharya RS, Strahl GA, Collum D. Cleaners for military machine parts - Is there a green alternative? Journal of Cleaner Production. 12: 771-780. DOI: 10.1016/S0959-6526(03)00117-3  1
2003 Wiedemann SH, Ramírez A, Collum DB. Lithium 2,2,6,6-tetramethylpiperidide-mediated alpha- and beta-lithiations of epoxides: solvent-dependent mechanisms. Journal of the American Chemical Society. 125: 15893-901. PMID 14677981 DOI: 10.1021/ja0304087  1
2003 Ramírez A, Lobkovsky E, Collum DB. Hemilabile ligands in organolithium chemistry: substituent effects on lithium ion chelation. Journal of the American Chemical Society. 125: 15376-87. PMID 14664582 DOI: 10.1021/ja030322d  1
2003 Liao S, Collum DB. Lithium diisopropylamide-mediated lithiations of imines: insights into highly structure-dependent rates and selectivities. Journal of the American Chemical Society. 125: 15114-27. PMID 14653747 DOI: 10.1021/ja030409z  1
2003 Zhao P, Collum DB. Ketone enolization by lithium hexamethyldisilazide: structural and rate studies of the accelerating effects of trialkylamines. Journal of the American Chemical Society. 125: 14411-24. PMID 14624589 DOI: 10.1021/ja030168v  1
2003 Zhao P, Collum DB. Lithium hexamethyldisilazide/triethylamine-mediated ketone enolization: remarkable rate accelerations stemming from a dimer-based mechanism. Journal of the American Chemical Society. 125: 4008-9. PMID 12670196 DOI: 10.1021/ja021284l  1
2002 Rutherford JL, Hoffmann D, Collum DB. Consequences of correlated solvation on the structures and reactivities of RLi-diamine complexes: 1,2-addition and alpha-lithiation reactions of imines by TMEDA-solvated n-butyllithium and phenyllithium. Journal of the American Chemical Society. 124: 264-71. PMID 11782178 DOI: 10.1021/ja002979u  1
2001 Briggs TF, Winemiller MD, Xiang B, Collum DB. Solution structures of the mixed aggregates derived from lithium acetylides and a camphor-derived amino alkoxide. The Journal of Organic Chemistry. 66: 6291-8. PMID 11559177 DOI: 10.1021/jo010305b  1
2001 Parsons RL, Fortunak JM, Dorow RL, Harris GD, Kauffman GS, Nugent WA, Winemiller MD, Briggs TF, Xiang B, Collum DB. NMR spectroscopic investigations of mixed aggregates underlying highly enantioselective 1,2-additions of lithium cyclopropylacetylide to quinazolinones. Journal of the American Chemical Society. 123: 9135-43. PMID 11552822 DOI: 10.1021/ja0105616  1
2001 Sun X, Winemiller MD, Xiang B, Collum DB. Solution structures and reactivities of the mixed aggregates derived from n-butyllithium and vicinal amino alkoxides. Journal of the American Chemical Society. 123: 8039-46. PMID 11506560 DOI: 10.1021/ja010136c  1
2001 Rutherford JL, Collum DB. Lithium diisopropylamide: oligomer structures at low ligand concentrations. Journal of the American Chemical Society. 123: 199-202. PMID 11456504 DOI: 10.1021/ja003104i  1
2001 Trivedi HK, Massey MM, Bhattacharya RS, Strahl GA, Collum D. Next generation lubrication system for weapons Tribology Letters. 10: 229-235. DOI: 10.1023/A:1016604706332  1
2001 Xiang B, Winemiller MD, Briggs TF, Fuller DJ, Collum DB. Optimizing HMQC for ISn spin systems Magnetic Resonance in Chemistry. 39: 137-140.  1
2000 Sun X, Collum DB. Lithium diisopropylamide-mediated enolizations: Solvent-dependent mixed aggregation effects Journal of the American Chemical Society. 122: 2459-2463. DOI: 10.1021/ja992063r  1
2000 Sun X, Collum DB. Lithium diisopropylamide-mediated enolizations: Solvent-independent rates, solvent-dependent mechanisms Journal of the American Chemical Society. 122: 2452-2458. DOI: 10.1021/ja992062z  1
2000 Xu F, Reamer RA, Tillyer R, Cummins JM, Grabowski EJJ, Reider PJ, Collum DB, Huffman JC. Highly enantioselective 1,2-addition of lithium acetylide-ephedrate complexes: Spectroscopic evidence for reaction proceeding via a 2:2 tetramer, and X-ray characterization of related complexes Journal of the American Chemical Society. 122: 11212-11218. DOI: 10.1021/ja0022728  1
2000 Aubrecht KB, Winemiller MD, Collum DB. BF3-mediated addition of lithium phenylacetylide to an imine: Correlations of structures and reactivities. BF3·R3N derivatives as substitutes for BF3·Et2O Journal of the American Chemical Society. 122: 11084-11089. DOI: 10.1021/ja002200g  1
2000 Chadwick ST, Rennels RA, Rutherford JL, Collum DB. Are n-BuLi/TMEDA-mediated arene ortholithiations directed? Substituent-dependent rates, substituent-independent mechanisms Journal of the American Chemical Society. 122: 8640-8647. DOI: 10.1021/ja001471o  1
1999 Rutherford JL, Collum DB. NMR spectroscopic studies of lithium diethylamide: Insights into ring laddering Journal of the American Chemical Society. 121: 10198-10202. DOI: 10.1021/ja992169m  1
1999 Ramírez A, Collum DB. Hemi-labile ligands in organolithium chemistry: Rate studies of the LDA- mediated α- and β-metalations of epoxides Journal of the American Chemical Society. 121: 11114-11121. DOI: 10.1021/ja992166+  1
1999 Lucht BL, Collum DB. Lithium hexamethyldisilazide: A view of lithium ion solvation through a glass-bottom boat Accounts of Chemical Research. 32: 1035-1042. DOI: 10.1021/ar960300e  1
1999 Aubrecht KB, Lucht BL, Collum DB. Solution structures of lithium monoalkylamides (RNHLi) Organometallics. 18: 2981-2987.  1
1998 Remenar JF, Collum DB. Structure and reactivity of lithium diisopropylamide solvated by polyamines: Evidence of monomer- and dimer-based dehydrohalogenations Journal of the American Chemical Society. 120: 4081-4086. DOI: 10.1021/ja9741279  1
1998 Rennels RA, Maliakal AJ, Collum DB. Ortholithiation of anisole by n-BuLi-TMEDA: Reaction via disolvated dimers Journal of the American Chemical Society. 120: 421-422. DOI: 10.1021/ja972610d  1
1998 Hoffmann D, Collum DB. Binding of diamines to n-butyllithium dimers: Relative solvation energies and evidence of correlated solvation [3] Journal of the American Chemical Society. 120: 5810-5811. DOI: 10.1021/ja971512p  1
1998 Thompson A, Corley EG, Huntington MF, Grabowski EJJ, Remenar JF, Collum DB. Lithium ephedrate-mediated addition of a lithium acetylide to a ketone: Solution structures and relative reactivities of mixed aggregates underlying the high enantioselectivities Journal of the American Chemical Society. 120: 2028-2038. DOI: 10.1021/ja9713791  1
1997 Sun X, Kenkre SL, Remenar JF, Gilchrist JH, Collum DB. Mechanism of lithium diisopropylamide-mediated ester deprotonation: The role of disolvated monomers Journal of the American Chemical Society. 119: 4765-4766. DOI: 10.1021/ja970406k  1
1997 Remenar JF, Collum DB. Chelation-based stabilization of the transition structure in a lithium diisopropylamide mediated dehydrobromination: Avoiding the 'universal ground state' assumption Journal of the American Chemical Society. 119: 5573-5582. DOI: 10.1021/ja970030a  1
1997 Remenar JF, Lucht BL, Collum DB. Lithium diisopropylamide solvated by monodentate and bidentate ligands: Solution structures and ligand binding constants Journal of the American Chemical Society. 119: 5567-5572. DOI: 10.1021/ja970029b  1
1997 Remenar JF, Lucht BL, Kruglyak D, Romesberg FE, Gilchirst JH, Collum DB. Lithium 2,2,6,6-Tetramethylpiperidide and Lithium 2,2,4,6,6-Pentamethylpiperidide: Influence of TMEDA and Related Chelating Ligands on the Solution Structures. Characterization of Higher Cyclic Oligomers, Cyclic Dimers, Open Dimers, and Monomers Journal of Organic Chemistry. 62: 5748-5754.  1
1996 Lucht BL, Bernstein MP, Remenar JF, Collum DB. Polydentate amine and ether solvates of lithium hexamethyldisilazide (LiHMDS): Relationship of ligand structure, relative solvation energy, and aggregation state Journal of the American Chemical Society. 118: 10707-10718. DOI: 10.1021/ja9618199  1
1996 Lucht BL, Collum DB. Solvation of lithium hexamethyldisilazide by N,N-dimethylethylenediamine: Effects of chelation on competitive solvation and mixed aggregation Journal of the American Chemical Society. 118: 3529-3530. DOI: 10.1021/ja953517x  1
1996 Lucht BL, Collum DB. Lithium ion solvation: Amine and unsaturated hydrocarbon solvates of lithium hexamethyldisilazide (LiHMDS) Journal of the American Chemical Society. 118: 2217-2225. DOI: 10.1021/ja953029p  1
1996 Aubrecht KB, Collum DB. Solution structure of lithium dicyclohexylamide (Cy2NLi) and related mixed aggregates: Comparison with lithium diisopropylamide Journal of Organic Chemistry. 61: 8674-8676.  1
1995 Rai R, Aubrecht KB, Collum DB. Palladium-catalyzed stille couplings of aryl-, vinyl-, and alkyltrichlorostannanes in aqueous solution Tetrahedron Letters. 36: 3111-3114. DOI: 10.1016/0040-4039(95)00485-U  1
1995 Lucht BL, Collum DB. Ethereal solvation of lithium hexamethyldisilazide: Unexpected relationships of solvation number, solvation energy, and aggregation state Journal of the American Chemical Society. 117: 9863-9874.  1
1995 Romesberg FE, Collum DB. Mechanism of lithium dialkylamide-mediated ketone and imine deprotonations: An MNDO study of monomer and open dimer pathways Journal of the American Chemical Society. 117: 2166-2178.  1
1994 Rai R, Collum DB. Reductions and radical cyclizations of aryl and alkyl bromides mediated by NaBH4 in aqueous base Tetrahedron Letters. 35: 6221-6224. DOI: 10.1016/S0040-4039(00)73396-X  1
1994 Carlier PR, Lucht BL, Collum DB. 6Li/15N NMR-based solution structural determination of Et2O- and TMEDA-solvated lithiophenylacetonitrile and a LiHMDS mixed aggregate Journal of the American Chemical Society. 116: 11602-11603.  1
1994 Romesberg FE, Collum DB. Lithium dialkylamide mixed aggregation: MNDO computational study of salt and solvent dependencies Journal of the American Chemical Society. 116: 9187-9197.  1
1994 Romesberg FE, Collum DB. Lithium dialkylamide mixed aggregation: An NMR spectroscopic study of the influence of hexamethylphosphoramide (HMPA) Journal of the American Chemical Society. 116: 9198-9202.  1
1994 Lucht BL, Collum DB. Structure of lithium hexamethyldisilazide (LiHMDS): Spectroscopic study of ethereal solvation in the slow-exchange limit Journal of the American Chemical Society. 116: 6009-6010.  1
1993 Sakuma K, Gilchrist JH, Romesberg FE, Cajthaml CE, Collum DB. Lithium bis(2-adamantyl)amide: Structure and reactivity of an extremely hindered lithium dialkylamide Tetrahedron Letters. 34: 5213-5216. DOI: 10.1016/S0040-4039(00)73955-4  1
1993 Bernstein MP, Collum DB. Metalation of imines by lithium diisopropylamide solvated by N,N,N′,N′-tetramethylethylenediamine: Evidence for solvent-free open dimer reactive intermediates Journal of the American Chemical Society. 115: 789-790.  1
1993 Collum DB. Solution structures of lithium dialkylamides and related N-lithiated species: Results from6Li-15N double labeling experiments Accounts of Chemical Research. 26: X1-233.  1
1993 Bernstein MP, Collum DB. Solvent- and substrate-dependent rates of imine metalations by lithium diisopropylamide: Understanding the mechanisms underlying "krel" Journal of the American Chemical Society. 115: 8008-8018.  1
1993 Romesberg FE, Bernstein MP, Gilchrist JH, Harrison AT, Fuller DJ, Collum DB. Structure of lithium hexamethyldisilazide (LiHMDS) in the presence of hexamethylphosphoramide (HMPA). Spectroscopic and computational studies of monomers, dimers, and triple ions Journal of the American Chemical Society. 115: 3475-3483.  1
1992 Gilchrist JH, Collum DB. Distinction of symmetric lithium dialkylamide dimers from higher oligomers by inverse-detected15N homonuclear zero-quantum NMR spectroscopy Journal of the American Chemical Society. 114: 794-795.  1
1992 Romesberg FE, Collum DB. Determination of structures of solvated lithium dialkylamides by semiempirical (MNDO) methods. Comparison of theory and experiment Journal of the American Chemical Society. 114: 2112-2121.  1
1992 Collum DB. Is N,N,N',N'-tetramethylethylenediamine a good ligand for lithium? Accounts of Chemical Research. 25: 448-454.  1
1992 Bernstein MP, Romesberg FE, Fuller DJ, Harrison AT, Collum DB, Liu QY, Williard PG. Structure and reactivity of lithium diisopropylamide in the presence of N,N,N′,N′-tetramethylethylenediamine Journal of the American Chemical Society. 114: 5100-5110.  1
1991 Hall PL, Gilchrist JH, Collum DB. Effects of lithium salts on the stereochemistry of ketone enolization by lithium 2,2,6,6-tetramethylpiperidide (LiTMP). A convenient method for highly E-selective enolate formation Journal of the American Chemical Society. 113: 9571-9574.  1
1991 Kim YJ, Bernstein MP, Roth ASG, Romesberg FE, Williard PG, Fuller DJ, Harrison AT, Collum DB. On the structure and reactivity of lithium diisopropylamide (LDA) in hydrocarbon solutions. Formation of unsolvated ketone, ester, and carboxamide enolates Journal of Organic Chemistry. 56: 4435-4439.  1
1991 Galiano-Roth AS, Kim YJ, Gilchrist JH, Harrison AT, Fuller DJ, Collum DB. Lithium diisopropylamide mixed aggregates: Structures and consequences on the stereochemistry of ketone enolate formation Journal of the American Chemical Society. 113: 5053-5055.  1
1991 Hall PL, Gilchrist JH, Harrison AT, Fuller DJ, Collum DB. Mixed aggregation of lithium enolates and lithium halides with lithium 2,2,6,6-tetramethylpiperidide (LiTMP) Journal of the American Chemical Society. 113: 9575-9585.  1
1991 Romesberg FE, Gilchrist JH, Harrison AT, Fuller DJ, Collum DB. On the structure of lithium 2,2,6,6-tetramethylpiperidide (LiTMP) and lithium diisopropylamide (LDA) in the presence of hexamethylphosphoramide (HMPA): Structure-dependent distribution of cyclic and open dimers, ion triplets, and monomers Journal of the American Chemical Society. 113: 5751-5757.  1
1990 Gilchrist JH, Harrison AT, Fuller DJ, Collum DB. 6Li and 15N nuclear magnetic resonance spectroscopic studies of lithiated cyclohexanone phenylimine revisited. Aggregation-state determination by single-frequency 15N decoupling Journal of the American Chemical Society. 112: 4069-4070.  1
1989 Galiano-Roth AS, Collum DB. Structure and reactivity of lithium diisopropylamide (LDA). The consequences of aggregation and solvation during the metalation of an N,N-dimethylhydrazone Journal of the American Chemical Society. 111: 6772-6778.  1
1988 DePue JS, Collum DB. Structure and reactivity of lithium amides. 6Li, 13C, and 15N NMR spectroscopic studies and colligative measurements of lithium diphenylamide and lithium diphenylamide-lithium bromide complex solvated by tetrahydrofuran Journal of the American Chemical Society. 110: 5518-5524.  1
1988 Klang JA, Collum DB. Syntheses and reactions of η5-(dimethylboryl)cyclopentadienyl cobalt and rhodium derivatives. Site-specific binding of unsaturated amines Organometallics. 7: 1532-1537.  1
1988 Hallock JS, Galiano-Roth AS, Collum DB. Organometallic chemistry of sulfinic acids. Highly stereo- and regioselective intramolecular hydroplatinations. X-ray crystal structure of (Ph3P)2Pt[trans-SO2CH(CH3)CH 2CH(CH2CH3)] Organometallics. 7: 2486-2494.  1
1988 DePue JS, Collum DB. Structure and reactivity of lithium diphenylamide. Role of aggregates, mixed aggregates, monomers, and free ions on the rates and selectivities of N-alkylation and E2 elimination Journal of the American Chemical Society. 110: 5524-5533.  1
1988 Galiano-Roth AS, Michaelides EM, Collum DB. 6Li, 13C, and 15N NMR spectroscopic studies of lithium dialkylamides. Solution structure of lithium isopropylcyclohexylamide (LICA) in tetrahydrofuran Journal of the American Chemical Society. 110: 2658-2660.  1
1988 Galiano-Roth AS, Collum DB. 6Li and 23Na NMR spectroscopic studies of metalated hydrazone cryptates. Effects of ion triplet formation on the stereochemistry of alkylation Journal of the American Chemical Society. 110: 3546-3553.  1
1987 Kallman N, Collum DB. 15N, 13C, and 6Li NMR spectroscopic studies and colligative measurements of lithiated cyclohexanone phenylimine solvated by tetrahydrofuran Journal of the American Chemical Society. 109: 7466-7472.  1
1986 Collum DB, Klang JA, Depue RT. Mechanistic studies of phosphorus-oxygen bond cleavages in group 7 dinuclear complexes of 2-pyridyl dimethylphosphinite. Journal of the American Chemical Society. 108: 2333-40. PMID 22175579 DOI: 10.1021/ja00269a032  1
1986 Collum DB, Depue RT, Klang JA. Metal- and alkoxide-mediated phosphorus-oxygen bond cleavage in (η5-cyclopentadienyl)cobalt phosphinite ester complexes Organometallics. 5: 1015-1018.  1
1986 Collum DB, Still WC, Mohamadi F. Synthesis of alternating hydroxy- and methyl-substituted hydrocarbons by oxymercuration of cyclopropylcarbinols Journal of the American Chemical Society. 108: 2094-2096.  1
1986 Wanat RA, Collum DB, Van Duyne G, Clardy J, DePue RT. Solid-state and solution studies of lithiated 2-carbomethoxycyclohexanone dimethylhydrazone and lithiated cyclohexanone phenylimine Journal of the American Chemical Society. 108: 3415-3422.  1
1986 Wanat RA, Collum DB. Approaches to the synthesis and detection of a transient palladium(0) alkylidene Organometallics. 5: 120-127.  1
1985 DePue RT, Collum DB, Ziller JW, Churchill MR. Alkoxide triggered ligand substitution. Highly stereoselective formation of unsaturated phosphinite ester - Mo(CO)4 chelates and the X-ray crystal structure of (PMe2OCHPhCH=CH2)Mo(CO)4 Journal of the American Chemical Society. 107: 2131-2137.  1
1985 Wanat RA, Collum DB. On the origin of the stereoselectivity of hydrazone alkylations. Investigation of aggregation effects and solution kinetics Journal of the American Chemical Society. 107: 2078-2082.  1
1985 Abruña HD, Breikss AI, Collum DB. Improved synthesis of 4-vinyl-4′-methyl-2,2′-bipyridine [3] Inorganic Chemistry. 24: 987-988.  1
1984 Mohamadi F, Collum DB. Conversion of ketones to trisubstituted olefins under neutral conditions Tetrahedron Letters. 25: 271-272. DOI: 10.1016/S0040-4039(00)99859-9  1
1984 Collum DB, Kahne D, Gut SA, DePue RT, Mohamadi F, Wanat RA, Clardy J, Van Duyne G. Substituent effects on the stereochemistry of substituted cyclohexanone dimethylhydrazone alkylations. An X-ray crystal structure of lithiated cyclohexanone dimethylhydrazone Journal of the American Chemical Society. 106: 4865-4869.  1
1984 McGuirk PR, Collum DB. Total synthesis and stereochemistry of (+)-phyllanthocindiol Journal of Organic Chemistry. 49: 843-852.  1
1983 Collum DB, Mohamadi F, Hallock JS. Mercury(II)-mediated opening of cyclopropanes. Effects of proximate internal nucleophiles on stereo- and regioselectivity Journal of the American Chemical Society. 105: 6882-6889.  1
1982 McGuirk PR, Collum DB. Total synthesis of (+)-phyllanthocin Journal of the American Chemical Society. 104: 4496-4497.  1
1981 Kahne D, Collum DB. Kinetic cyanations of ketone enolates Tetrahedron Letters. 22: 5011-5014. DOI: 10.1016/S0040-4039(01)92406-2  1
1980 Collum DB, McDonald JH, Still WC. Synthesis of the polyether antibiotic monensin. 3. Coupling of precursors and transformation to monensin [23] Journal of the American Chemical Society. 102: 2120-2121.  1
1980 Collum DB, McDonald JH, Still WC. Synthesis of the polyether antibiotic monensin. 1. Strategy and degradations [21] Journal of the American Chemical Society. 102: 2117-2118.  1
1980 Collum DB, McDonald JH, Still WC. Synthesis of the polyether antibiotic monensin. 2. Preparation of intermediates [22] Journal of the American Chemical Society. 102: 2118-2120.  1
1979 Still WC, McDonald JH, Collum DB, Mitra A. A highly stereoselective synthesis of the C18 cecropia juvenile hormone Tetrahedron Letters. 20: 593-594. DOI: 10.1016/S0040-4039(01)86010-X  1
1978 Collum DB, Chen SC, Ganem B. A new synthesis of amides and macrocyclic lactams Journal of Organic Chemistry. 43: 4393-4394.  1
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