Efficient One-Pot Synthesis of 2-Chloro-1,1, 1-trifluoro-2-alkenes Under Solvent-Free Conditions
摘要:
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.
α,β-Disubstituted CF<sub>3</sub>-Enones as a Trifluoromethyl Building Block: Regioselective Preparation of Totally Substituted 3-CF<sub>3</sub>-Pyrazoles
作者:Vasiliy M. Muzalevskiy、Zoia A. Sizova、Vasiliy V. Panyushkin、Vyacheslav A. Chertkov、Victor N. Khrustalev、Valentine G. Nenajdenko
DOI:10.1021/acs.joc.0c02516
日期:2021.2.5
An efficient pathway toward a novel class of trifluoromethyl building blocks was elaborated. The reaction of α-CF3-enamines with arylaldehydes resulted in direct synthesis of α,β-diaryl-CF3-enones isolated in up to 93% yield as E-isomers. The possible reaction mechanism was proposed using the Zimmerman–Traxler model. The reaction of α,β-diaryl-CF3-enones with hydrazines opens a novel pathway to trifluoromethylated
作者:Vasily N Korotchenko、Alexey V Shastin、Valentine G Nenajdenko、Elisabeth S Balenkova
DOI:10.1016/s0040-4020(01)00701-3
日期:2001.8
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.
Synthesis of 2-trifluoromethylated quinolines from CF<sub>3</sub>-alkenes
作者:Vasiliy M. Muzalevskiy、Zoia A. Sizova、Vladimir T. Abaev、Valentine G. Nenajdenko
DOI:10.1039/d1ob00098e
日期:——
2-CF3-3-arylquinolines in up to 99% isolated yield. High synthetic utility of all synthetic steps of the sequence was shown. A one-pot procedure was developed to give the target trifluoromethylated quinolines directly from enamines or haloalkenes.
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.