Radical-mediated thiodesulfonylation of the vinyl sulfones: access to (α-fluoro)vinyl sulfides
摘要:
Radical-mediated thiodesulfonylation of the vinyl and (alpha-fluoro)vinyl sulfones, derived from aldehydes and ketones, with aryl thiols in organic or aqueous medium provided access to vinyl and (a-fluoro)vinyl sulfides. The vinyl sulfides were formed predominantly with E stereochemistry independent of the stereochemistry of the starting vinyl sulfones. (C) 2009 Elsevier Ltd. All rights reserved.
作者:James R. McCarthy、Donald P. Matthews、Michael L. Edwards、David M. Stemerick、Esa T. Jarvi
DOI:10.1016/s0040-4039(00)97869-9
日期:1990.1
The carbanion of diethyl 1-fluoro-1-(phenylsulfonyl)methanephosphonate (), generated from fluoromethyl phenyl sulfone () undergoes the Horner-Wittig reaction with aldehydes and ketones to yield α-fluoro-α,β-unsaturated sulfones (). Reductive removal of the phenylsulfonyl group provides a facile two-step route to vinyl fluorides froa , where the fluorine source is either KF or DAST.