Rearrangement of carbanions and of ylides derived from 4-thiacyclohexenyl systems
作者:J.F. Biellmann、J.B. Ducep、J.J. Vicens
DOI:10.1016/0040-4020(76)85177-0
日期:1976.1
The rearrangement of the carbanion and of the ylide derived from 5,5-diphenyl-4-thiacyclohexene to (E)2,2-diphenyle-1-methylthiovynylcyclopropane is shown to depend on the presence of a stabilizing substituent at C-5. A non concerted mechanism is proposed for this rearrangement. The carbanions from the 4-thiacyclohexene and from the sulfone of the 5,5-diphenyl-4-thiacyclohexene are stable. The cycloaddition
由5,5-二苯基-4-硫代环己烯衍生的碳负离子和内鎓盐的重排至(E)2,2-二苯基e-1-甲基硫代亚乙烯基环丙烷取决于在C-5处稳定取代基的存在。对于这种重新布置,提出了一种不协调的机制。来自4-硫代环己烯和来自5,5-二苯基-4-硫代环己烯的砜的碳负离子是稳定的。芳香族硫酮与丁二烯的环加成反应已扩展为脂肪族硫酮。