The preparation and cycloaddition reaction of 1-sulfonyl-1-trifluoromethyl allenes
作者:Jun-Li Li、Xian-Jin Yang、Min Jiang、Jin-Tao Liu
DOI:10.1016/j.tetlet.2017.07.050
日期:2017.8
A series of 1-sulfonyl-1-trifluoromethyl allenes were prepared for the first time from commercial available 2-bromo-3,3,3-trifluoropropene. Cycloadditionreaction of these trifluoromethylated allenes with nitrones occured readily under mild conditions, giving the corresponding trifluoromethylated isoxazolidines in high yields.
Treatment of various fluorinated internal alkynes with 10 mol% of RhCl3·H2O and 30 mol% of i-Pr2NEt in toluene at the reflux temperature for 18 h gave the corresponding trimerization products as an isomeric mixture in high yields. Cycloaddition using 1.0 equiv. of fluorinated alkynes and 2.0 equiv. of non-fluorinated alkynes under the same reaction conditions as in the trimerization led to mono- and
A novel method for the generation of 3,3,3-trifluoro-propynyllithium is reported, which involves treatment of trifluoromethyl-substituted enol tosylate, prepared from 1,1-dichloro-3,3,3-trifluoroacetone, with two equivalents of butyllithium. -Palladium-catalyzed coupling reaction of sulfonates of the carbonyl adducts with organozinc reagents gave trifluoromethyl-containing tri- and tetrasubstituted
Palladium-catalyzed cyclocarbonylation of trifluoromethyl propargylic alcohols producing 3-trifluoromethyl-2(5H)-furanones (γ-lactones)
作者:Zhong-Xing Jiang、Feng-Ling Qing
DOI:10.1016/s0040-4039(01)02006-8
日期:2001.12
The reaction of trifluoromethyl propargylic alcohols 1, CO and H-2 in the presence of catalytic Pd(OAc)(2) and PPh3 afforded 3-tifluoroinethyl-2(5H)-furanones 2 in high yields. (C) 2001 Published by Elsevier Science Ltd.
Ruthenium-catalyzed 1,3-dipolar cycloaddition of trifluoromethylated propargylic alcohols with azides
作者:Chun-Tao Zhang、Xingang Zhang、Feng-Ling Qing
DOI:10.1016/j.tetlet.2008.04.065
日期:2008.6
The 1,3-dipolar cycloaddition of trifluoromethylated propargylic alcohols 1 with azides in the presence of catalytic [Cp*RuCl2], afforded exclusively 4-trifluoroniethyl-1,4,5-trisubstituted-1,2,3-triazoles 2 in high yields. (c) 2008 Elsevier Ltd. All rights reserved.