Rearrangement of 2,3-disubstituted benzofuran epoxides prepared by dimethyldioxirane oxidation
作者:Waldemar Adam、Markus Sauter
DOI:10.1016/s0040-4020(01)89283-8
日期:1994.1
Benzofuran epoxides, prepared by dimethyldioxirane (DMD) oxidation of the corresponding 2,3-disubstituted benzofurans, afford on 1,2 migration the respective benzofuranones 4a,d-f, except 3-tert-butyl-2-methylbenzofuran epoxide (2c), which persists even at room temperature; however, on DMD oxidation of 2-methylbenzofuran (1b), the ester 5b is formed by a novel oxidative cleavage of the intermediary
通过二甲基二环氧乙烷(DMD)氧化相应的2,3-二取代的苯并呋喃制得的苯并呋喃环氧化物在1,2迁移时分别提供苯并呋喃酮4a,df,但3-叔丁基-2-甲基苯并呋喃环氧化物(2c)持续存在即使在室温下 然而,在2-甲基苯并呋喃(1b)的DMD氧化中,酯5b是通过中间环氧化物的新型氧化裂解而形成的。