Efficient Carbonyl Addition of Polyfluorochloroethyl, -ethylidene, and -ethenyl Units by Means of 1,1,1-Trichloro-2,2,2-trifluoroethane and Zinc
作者:Makoto Fujita、Tamejiro Hiyama
DOI:10.1246/bcsj.60.4377
日期:1987.12
powder in N,N-dimethylformamide and was allowed to add to carbonyls of aldehydes and α-keto esters in excellent yields to give 1-substituted 2,2-dichloro-3,3,3-trifluoro-1-propanols. Employment of excess zinc induced further reductive β-elimination to afford 1-substituted 2-chloro-3,3,3-trifluoropropenes (3) and 1-substituted 2-chloro-3,3-difluoro-2-propen-1-ols (4). Exclusive formation of 3 was achieved
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.
Practical ways from aldehydes to 2-chloro-1,1,1-trifluoro-2-alkenes and 2-chloro-1,1-difluoro-1-alken-3-ols
作者:Makoto Fujita、Tamejiro Hiyama
DOI:10.1016/s0040-4039(00)84873-x
日期:1986.1
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.
Synthesis of trifluoromethylalkenes and alkynes. Trifluoromethyl captodative olefins
作者:André J. Laurent、Isabelle M. Le drean、Abdelaziz Selmi
DOI:10.1016/0040-4039(91)80692-y
日期:1991.6
beta-ethylthio-beta-trifluoromethylketones 3 and aldehydes 4 are easily prepared from beta-chloroolefines 5 and 6. Trifluoromethylalkynes 7 and captodative alkenes 8 are obtained by reaction of KOH on aldehydes 6 or 4.