New one-step process for the synthesis of functionalized 1,6-dioxaspiro[4,5]decanes
作者:Juan C. Carretero、Javier Rojo、Nuria Díaz、Chafiq Hamdouchi、Ana Poveda
DOI:10.1016/0040-4020(95)00453-f
日期:1995.7
β-Phenylsulfonyldihydrofurans 1 were readily prepared by reduction of α-phenylsulfonyl-γ-lactones with DIBAL-H, followed by dehydration with MsCl-Et3N. Dihydrofurans 1 were deprotonated with n-BuLi and the resulting α-lithiated carbanion reacted with a wide variety of electrophiles. Particularly interesting is its reaction with γ-lactones because affords 1,6-dioxaspiro[4,5]decanes in good yields in