A variety of 1-(phenylthio)-1-(trimethylsilyl)cyclopropanes, fused to five-, six-, and seven-membered rings have been prepared by several procedures and reductively lithiated by means of aromatic radical anions. The resulting 1-lithio-1-(trimethylsilyl)cyclopropanes have been treated in most cases with α,β-unsaturated aldehydes, followed by potassium tert-butoxide to yield allylidenecyclopropanes.
多种 1-(苯
硫基)-1-(三甲基甲
硅烷基)
环丙烷与五、六和七元环稠合已通过多种方法制备,并通过芳香基阴离子还原
锂化。在大多数情况下,所得的 1-
锂硫基-1-(三甲基甲
硅烷基)
环丙烷已用 α,β-不饱和醛处理,然后用
叔丁醇钾处理,生成烯
丙基环丙烷。后者在密封管或闪蒸真空热解装置中进行热重排后,会发生双环膨胀,生成
环戊烯环己烯、-
环庚烯(氢化
茚)或-环
辛烯