2-Ethoxycarbonyl-1-silacyclobutanes were synthesized by intramolecular C–H insertion of carbenes generated photochemically from α-(di-tert-butylsilyl)-α-diazoacetates; they undergo smooth thermal ring-expansion by a 1,3(C → O) silyl shift to form 6-ethoxy-1-oxa-2-silacyclohex-5-enes.
2-Ethoxycarbonyl-1-silacyclobutanes 是通过 α-(二叔丁基甲
硅烷基)-α-
重氮乙酸酯光
化学产生的卡宾的分子内 C-H 插入合成的;它们通过 1,3(C → O) 甲
硅烷基位移进行平滑的热扩环,形成 6-ethoxy-1-oxa-2-silacyclohex-5-enes。