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 thermalrearrangement 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)