Mammalian Alkaloids: Configurations of O
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Maria Chrzanowska; Bernhard SchΓΆnenberger; Arnold Brossi; Judith L. Flippen-Ande
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Article
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1987
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John Wiley and Sons
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German
β 665 KB
Synthesis of the optical isomers of (+)-methyl 6,7-dimethyl-3',4'-dideoxynorlaudanosoline-l-carboxylate ((k)-Z) was accomplished by reaction of (+)-2 with (+)-(R)-1-phenylethyl isocyanate, separation of the urea diastereoisomers (-)-4A and (+)-48, and alcoholysis of the ureas in refluxing BuOH. Opti