Ligand exchange reaction of sulfoxides in organic synthesis: A novel method for synthesizing acetylenes and allenes from carbonyl compounds through sulfoxides having a trifluoro-methanesulfonyloxy group on the β-carbon
A novel method for synthesizing acetylenes and allenes from carbonyl compounds is described. Ligand exchange reaction of alkenylsulfoxides having a trifluoromethanesulfonyloxy group on the β-carbon, which were derived from α-alkyl β-ketosulfoxides, with n-BuLi gave disubstituted acetylenes in good yields. In the case of alkenylsulfoxides having both the trifluoromethanesulfonyloxy and aryl groups on
Ligand exchange reaction of sulfoxides in organic synthesis: Sulfoxide version of the Julia-Lythgoe olefination
作者:Tsuyoshi Satoh、Noriko Yamada、Tohru Asano
DOI:10.1016/s0040-4039(98)01457-9
日期:1998.9
Reaction of beta-mesyloxy sulfoxides, derived from alkyl (or arylmethyl) pheny] sulfoxides and aldehydes in two steps, with alkylmetal (n-BuLi, t-BuLi, or EtMgBr) at -78 degrees C gave olefins in good to excellent yields. This reaction offers a sulfoxide version of the Julia-Lythgoe olefination. (C) 1998 Elsevier Science Ltd. All rights reserved.