Synthesis of Vinyl Sulfoxides Using Sulfinyl Chlorides and Olefins
作者:Xiancai Ding、Jianming Wen、Jianqiang Wang、Jun Yu、Jing-Hua Li
DOI:10.3184/174751915x14304098020793
日期:2015.5
synthesis of vinyl sulfoxides, using sulfinyl chlorides and olefins as starting materials and DBU as an HCl scavenger, has been developed. Vinyl sulfoxides were obtained from the ZnCl2 catalysed addition of sulfinyl chlorides to olefins followed by the elimination with DBU. However, the direct reaction of sulfinyl chlorides with olefins in the presence of DBU, usually leads to generation of vinyl sulfones
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
New approach to the stereoselective synthesis of the [4.5] spiroketal moiety of papulacandins
作者:Juan C. Canetero、J.Eugenio de Diego、Chafiq Hamdouchi
DOI:10.1016/s0040-4020(99)00990-4
日期:1999.12
An efficient approach for the stereoselective construction of the spiroketal moiety of papulacandins, based on the condensation of the protected derivative of D-arabino-1,4-lactone 2 with the α-lithiated carbanion of β-phenylsulfonyl dihydrofuran 1, is described.