INTRAMOLECULAR INTERCONVERSION OF SYN-TRICARBONYL(1-ETHOXY-1,2-DIHYDROCYCLOBUTABENZENE)CHROMIUM AND ANTI-TRICARBONYL(1-ETHOXY-1,2-DIHYDROCYCLOBUTABENZENE)CHROMIUM - TRAPPING OF THE ORTHO-QUINODIMETHANE INTERMEDIATE

被引：31

作者：

KUNDIG, EP ^{[1
]}

BERNARDINELLI, G ^{[1
]}

LERESCHE, J ^{[1
]}

ROMANENS, P ^{[1
]}

机构：

[1] UNIV GENEVA,CRYSTALLOG LAB,CH-1211 GENEVA 4,SWITZERLAND

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH | 1990年 / 29卷 / 04期

关键词：

D O I：

10.1002/anie.199004071

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The reversible isomerization of syn‐1 to anti‐1 occurs without cleavage of metal‐ligand bonds, as demonstrated through a [4 + 2] cycloaddition with trans‐1,2‐bis(trimethylsilyl)ethene as the dienophile, which led to the trapping of an ortho‐quinodimethane intermediate. Further evidence comes from kinetic studies. Ring opening in 1 proceeds considerably more slowly than in the case of the non‐complexed analogue, a finding that can be explained by entropy effects. (Figure Presented.) Copyright © 1990 by VCH Verlagsgesellschaft mbH, Germany

引用

页码：407 / 409

页数：3

共 17 条

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