The iodolactone approach to enantiopure oxiranes of constrained chiral cyclic β-amino acids
摘要:
A simple and efficient method has been developed for the synthesis of enantiopure epoxide derivatives of some constrained chiral cyclic beta-amino acids via iodolactonization and alkaline de-iodation. Lower stereo-selectivities were observed when the classical method using mCPBA was used when a bicyclic beta-amino acid was involved leading to a quasi-inseparable mixture of two epoxides. (C) 2008 Elsevier Ltd. All rights reserved.
ISOQUINUCLIDINE DERIVATIVE AND METHOD FOR PRODUCING 1-CYCLOHEXENE-1-CARBOXYLIC ACID DERIVATIVE BY USING THE SAME
申请人:The University of Tokyo
公开号:EP2050752A1
公开(公告)日:2009-04-22
The present invention provides an isoquinuclidine derivative which can be used to easily synthesize oseltamivir or an analog thereof. In particular, the present invention provides an isoquinuclidine derivative represented by the following formula (1) or an enantiomer thereof:
wherein in the formula (1), A represents a protective group for the nitrogen atom; R1 to R1 each independently represent an alkyl group which may have a substituent, an aryl group which may have a substituent, or a hydrogen atom; and X represents a halogen atom.