A new and general one-pot transformation of aromatic aldehydes to fluorinated olefins containing -CH=C(Cl)CF3 or -CH=C(F)CClF2 moieties is described. Freons CCl3CF3 and CCl2FCCIF2 were used as trifluoromethyl and difluoromethyl C-2-building blocks respectively. A proposed mechanism for the reaction is discussed. (C) 2001 Elsevier Science Ltd. Ali rights reserved.
A new, selective protocol for the synthesis of 1-substituted 2-(trifluoromethyl)indoles has been developed by palladium-catalyzed double amination reaction of 2-chloro-1-(2-halophenyl)-3,3,3-trifluoroprop-1-enes with primary amines. This route allows the formation of two C-N bonds in one pot from the reaction between 2-chloro-1-(2-halophenyl)-3,3,3-trifluoroprop-1-enes and primary amines using the
通过钯催化2-氯-1-(2-卤代苯基)-3,3,3-三氟丙-1的双胺化反应,开发了一种新的选择性合成1-取代的2-(三氟甲基)吲哚的方案。 -与伯胺的烯。该路线允许使用Pd 2(dba)3在2-氯-1-(2-卤代苯基)-3,3,3-三氟丙-1-烯与伯胺之间的反应中在一个罐中形成两个CN键/ L4 / t -BuONa系统。 钯-双胺-2-氯-1-(2-卤代苯基)-3,3,3-三氟丙-1-烯-2-(三氟甲基)吲哚
Efficient One-Pot Synthesis of 2-Chloro-1,1, 1-trifluoro-2-alkenes Under Solvent-Free Conditions
作者:Mu-Wang Chen、Xing-Guo Zhang、Ping Zhong、Mao-Lin Hu
DOI:10.1080/00397910802431123
日期:2009.2.9
The improved one-pot Wittig reaction had been used to prepare trifluoromethyl-containing olefins under solvent-free conditions. Treatment of aldehydes with PPh3 and CF3CCl3 in the presence of K2CO3 at 100C afforded 2-chloro-1,1,1-trifluoro-2-alkenes in good to moderate yields.