Novel Synthetic Reactions Using Bis(2,2,2-trifluoroethoxy)diorganosulfuranes
作者:Tomoya Kitazume、Nobuo Ishikawa
DOI:10.1246/bcsj.53.2064
日期:1980.7
Alkoxy- or acyloxysulfuranes prepared in situ by the ligand exchange of bis(2,2,2-trifluoroethoxy)diorganosulfuranes with alcohols or carboxylic acids were found to behave as a potential alkylating or acylating reagent for the preparation of unsymmetrical sulfides, ketones, and esters.
Free radical allylations of α-seleno carbonyl compounds with tributyl-substituted 2,4-pentadienyltin, 2-methyl-2-propenyltin, 2-butenyltin, and 3-methyl-2-butenyltin, are described. Such successful C–C bond formations, in particular with the 2-butenyltin and the 3-methyl-2-butenyltin, are owing to the high reactivity of the α-carbon radical, generated from α-seleno carbonyl compounds, toward allylic tin compounds.
We report a nickel/NHC-catalyzed branched-selective acrotylation of simple ketones using 1,3-butadiene as the alkylation agent. This reaction is regioselective and operated under pH and redox-neutral conditions. Water was used as the sole additive, which significantly accelerates the transformation.
Mikami, Koichi; Takahashi, Kazuhiko; Nakai, Takeshi, Journal of the American Chemical Society, 1994, vol. 116, # 24, p. 10948 - 10954