Johannes Rudolf Jansen

Affiliations: 
Bayer CropScience AG 
Area:
small molecules, active ingridients
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"Johannes Jansen"
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Publications

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Bringmann G, Jansen JR. (1991) Stereocontrolled ring opening of Axially prostereogenic biaryl lactones with hydrogen nucleophiles: Directed synthesis of a dioncophylline A precursor and (optionally) its atropdiastereomer Synthesis. 825-827
Bringmann G, Rubenacker M, Jansen JR, et al. (1990) Isolation, structure elucidation, and stereoselective total synthesis of novel alkaloids from Triphyophyllum peltatum Planta Medica. 56: 495-496
Bringmann G, Jansen JR, Reuscher H, et al. (1990) First total synthesis of (-)-dioncophylline A ("Triphyophylline") and of selected stereoisomers: Complete (revised) stereostructure Tetrahedron Letters. 31: 643-646
Bringmann G, Rübenacker M, Jansen JR, et al. (1990) On the structure of the dioncophyllaceae alkaloids dioncophylline a ("triphyophylline") and "O-Methyl-Triphyophylline" Tetrahedron Letters. 31: 639-642
Bringmann G, Jansen JR. (1989) Chiral economy with respect to rotational isomerism: Rational synthesis of hamatine and (optionally) ancistrocladine from joint helical precursors Heterocycles. 28: 137-142
Bringmann G, Jansen JR. (1986) One pot preparation of 1,3-dimethyltetrahydroisoquinolines from their biosynthetic diketo precursors Heterocycles. 24: 2407-2410
Bringmann G, Jansen JR, Rink HP. (1986) Regioselective and atropoisomeric-selective aryl coupling to give naphthyl isoquinoline alkaloids: The first total synthesis of (-)-ancistrocladine Angewandte Chemie - International Edition in English. 25: 913-915
Bringmann G, Jansen JR. (1984) A first and general route to naphthylisoquinoline alkaloids: the total synthesis of O-methyl-tetradehydro-triphyophylline Tetrahedron Letters. 25: 2537-2540
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