SYNTHESIS OF ALPHA-METHYLENE BETA-LACTONES, NOVEL HETEROCYCLES

被引:26
|
作者
ADAM, W [1 ]
ALBERT, R [1 ]
GRAU, ND [1 ]
HASEMANN, L [1 ]
NESTLER, B [1 ]
PETERS, EM [1 ]
PETERS, K [1 ]
PRECHTL, F [1 ]
VONSCHNERING, HG [1 ]
机构
[1] MAX PLANCK INST FESTKORPERFORSCH,W-7000 STUTTGART,GERMANY
来源
JOURNAL OF ORGANIC CHEMISTRY | 1991年 / 56卷 / 20期
关键词
D O I
10.1021/jo00020a016
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Triphenylphosphine deoxygenation of beta-alkyl, beta,beta-dialkyl-, and beta,beta-spirocycloalkyl-substituted alpha-methylene-beta-peroxy lactones 3a-k, which are readily available by photooxygenation of the corresponding alpha,beta-unsaturated carboxylic acids 1, and cyclization of the resulting alpha-methylene-beta-hydroperoxy acids 2 constitute a convenient method for the preparation of a variety of alpha-methylene beta-lactones 5. Alternatively, the alpha-methylene-beta-hydroxy carboxylic acids 4 can be directly cyclized by benzenesulfonyl chloride in pyridine into these novel four-membered ring heterocycles 5.
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页码:5778 / 5781
页数:4
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