Asymmetric synthesis of (–)-(1R,2S)-cispentacin and related cis- and trans-2-amino cyclopentane- and cyclohexane-1-carboxylic acids
作者:Stephen G. Davies、Osamu Ichihara、Isabelle Lenoir、Iain A. S. Walters
DOI:10.1039/p19940001411
日期:——
The antifungal antibiotic (–)-(1R,2S)-2-aminocyclopentane-1-carboxylic acid (cispentacin)8 and its cyclohexane homologue 14 have been prepared utilizing the highly stereoselective conjugate addition of homochiral lithium N-benzyl-N-α-methylbenzylamide 5. The corresponding trans-β-amino acids 10 and 16 were also prepared via the selective epimerization of the cis-β-amino ester conjugate addition products
抗真菌抗生素(–)-(1 R,2 S)-2-氨基环戊烷-1-羧酸(顺喷塔星)8及其环己烷同系物14是通过高立体选择性共轭加成手性锂N-苄基-N-制备的。 α-甲基苄基酰胺5。还通过顺式-β-氨基酯缀合物加成产物的选择性差向异构化制备了相应的反式-β-氨基酸10和16。