Rearrangement thermique de cycles a 3 chainons α-ethyleniques α'-acetyleniques trans
作者:N Manisse、J Chuche
DOI:10.1016/0040-4020(77)80254-8
日期:1977.1
The thermal rearrangement of α-ethylenic α'-acetylenic oxiranes and aziridines is described. Trans-vinyl-ethynyloxirane 1a yields trans (3aT) and cis (3aC) formyl-ethynyl-cyclopropane and dihydrofuran4a. The cis isomer 1aC yields the same products, but by a different mechanism. The proposed mechanism is supported by the analogous conversion of oxiranes substituted on the acetylenic carbon (1e and 1d)
描述了α-乙烯α'-炔基环氧乙烷和氮丙啶的热重排。反式-乙炔基环氧乙烷1a产生反式(3aT)和顺式(3aC)甲酰基-乙炔基-环丙烷和二氢呋喃4a。顺式异构体1aC产生相同的产物,但机理不同。乙炔碳(1e和1d)上取代的环氧乙烷类化合物的类似转化为拟议的机理提供了支持。反式N-叔丁基-2-乙炔基-3-乙烯基氮丙啶的热解产生N-叔丁基-1H-氮杂。