AZINOTHRICIN SYNTHETIC STUDIES .1. EFFICIENT ASYMMETRIC SYNTHESES OF (3R)-PIPERAZIC AND (3S)-PIPERAZIC ACIDS

被引:43
作者
HALE, KJ
DELISSER, VM
MANAVIAZAR, S
机构
[1] The Christopher Ingold Laboratories, Department of Chemistry, University College London, London, WC1H OAJ England
关键词
D O I
10.1016/S0040-4039(00)60838-9
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
A convenient asymmetric synthesis of both (3R)- and (3S)-piperazic acids has been developed that is based on electrophilic hydrazination of a chiral bromovaleryl carboximide enolate with di-tert-butyl azodicarboxylate, followed by subsequent intramolecular S(N)2 displacement of the bromide by the resulting substituted aza anion. The diastereoselectivity of the process is typically greater than 96%.
引用
收藏
页码:7613 / 7616
页数:4
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