A NEW ACCESS TO PHOSPHAINDOLIZINES BY [3+2] CYCLOADDITION OF AZOMETHINE YLIDES ONTO PHOSPHAALKYNES

被引：39

作者：

BERGSTRASSER, U ^{[1
]}

HOFFMANN, A ^{[1
]}

REGITZ, M ^{[1
]}

机构：

[1] UNIV KAISERSLAUTERN,FACHBEREICH CHEM,ERWIN SCHRODINGER STASSE,W-6750 KAISERSLAUTERN,GERMANY

来源：

TETRAHEDRON LETTERS | 1992年 / 33卷 / 08期

关键词：

D O I：

10.1016/S0040-4039(00)91856-2

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Azomethine ylides such as 1 and 4 in which the nitrogen atom is incorporated in a six-membered heterocyclic ring undergo regiospecific [3 + 2] cycloadditions with the phosphaalkynes 2a and b at 130-140-degrees-C to furnish the phosphaindolizines 3 and 5a-c after elimination of ethyl formate or hydrogen cyanide, respectively. In contrast, dipoles of the type 6 react unspecifically with the phosphaalkyne 2a to yield the regioisomers 7 and 8.

引用

页码：1049 / 1052

页数：4

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