irradiation of ethyl 3-cyclobutylpropen-2-oate delivered the β,γ-unsaturated isomer in high yield. Its CC double bond was submitted to epoxidation and cyclopropanation to deliver the corresponding spiro[3.2]hexane derivatives. Alternatively, the same substrate treated by TMS–I or by OsO4 allowed an easy access to two spiranic butyrolactones.
3-
环丁基丙-2-酸
乙酯的紫外线照射可高产β,γ-不饱和异构体。其CC双键进行环氧化和
环丙烷化,以提供相应的螺[3.2]己烷衍
生物。另外,通过TMS-1或OsO 4处理过的同一底物可以轻松获得两种螺环丁内酯。