METHYLENE PHOSPHONIUM IONS

被引：58
作者：
GRUTZMACHER, H
PRITZKOW, H
机构：
[1] Anorganisch-Chemisches Institut, Universität Heidelberg, Heidelberg, W-6900
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH | 1991年 / 30卷 / 06期
关键词：
D O I：
10.1002/anie.199107091
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Despite steric shielding of the P = C bond, the methylenephosphonium ions 1 and 2 react with 2,3-dimethylbutadiene in an ene reaction and a [2 + 4]cyclo-addition reaction, respectively, to give 3 and 4 (counterion in all cases AlCl4-). This reaction behavior is understandable from the pronounced electron-deficient character of the alkyl-substituted P atoms. Compounds 1 and 2 are formed in high yields from the corresponding P-chloro-substituted phosphorus ylides by chloride abstraction.
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页码：709 / 710
页数：2
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