HIGHLY ENANTIOSELECTIVE SYNTHESIS OF PIPECOLIC ACID-DERIVATIVES VIA AN ASYMMETRIC AZA-DIELS-ALDER REACTION

被引:51
作者
BAILEY, PD
LONDESBROUGH, DJ
HANCOX, TC
HEFFERNAN, JD
HOLMES, AB
机构
[1] UNIV YORK,DEPT CHEM,YORK YO1 5DD,N YORKSHIRE,ENGLAND
[2] UNIV CAMBRIDGE,CHEM LAB,CAMBRIDGE CB2 1EW,ENGLAND
关键词
D O I
10.1039/c39940002543
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Very high asymmetric induction is observed in the aza-Diels-Alder reaction between dienes and the imine (R)-PhMeCH-N=CHCO(2)PhMen* (where PhMen* = 8-phenylmenthyl), which bears matched auxiliaries on nitrogen and on the ester; reactions in trifluoroethanol, in the presence of trifluoroacetic acid (1 equiv.), give substituted pipecolic acid derivatives in ca 50% isolated yield, with only a single regio- and diastereo-isomer of the-cycloadduct detectable in all cases (d.e. >95%).
引用
收藏
页码:2543 / 2544
页数:2
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