Cyclopentenone and cyclohexenone annulations via acid-catalyzed 1,2- and 1,3-acyl migration of 2-vinylcyclobutanones. Rearrangement route to spiro- and angularly substituted fused-cyclopentenones.
作者:James R. Matz、Theodore Cohen
DOI:10.1016/s0040-4039(01)92932-6
日期:1981.1
In the presence of acid, 2-alkyl-2-vinylcyclobutanones rearrange mainly by a 1,2-acyl migration to give cyclopentenones while 2-vinylcyclobutanones lacking 2-alkyl substituents undergo a 1,3-acyl migration to produce cyclohexenones; the former rearrangement can be used to produce angularly substituted fused bicyclic systems.
在酸的存在下,2-烷基-2-乙烯基环丁酮主要通过1,2-酰基迁移而重排以产生环戊烯酮,而缺少2-烷基取代基的2-乙烯基环丁酮经历1,3-酰基迁移以产生环己烯酮;前者的重排可用于产生有角度取代的稠合双环系统。