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A Nonconcerted IntramolecularDiels‐AlderReaction of Chiral Allenic‐Acid Derivatives

 

作者: Latchezar S. Trifonov,   Alexander S. Orahovats,  

 

期刊: Helvetica Chimica Acta  （WILEY Available online 1989）
卷期: Volume 72, issue 1  

页码: 59-64

 

ISSN:0018-019X

 

年代: 1989

 

DOI:10.1002/hlca.19890720108

 

出版商: WILEY‐VCH Verlag GmbH

 

数据来源: WILEY

 

摘要:

AbstractThe reaction between the chiral allenic acid (+)‐(S)‐1and the carbodiimides2a–dand the keten‐imine6gives, under mild conditions, the tricyclic compounds3–5,7, and8. Low diastereoselectivity and a partial loss of optical activity are observed. A stepwise mechanistic pathwayviaa biradical intermediate is p

 

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