Synthesis of (2,2,2-Trifluoroethyl)benzene Derivatives
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Ando, Akira,Miki, Takuichi,Kumadaki, Itsumaro
p. 3637 - 3639
(2007/10/02)
HOMOLYTIC DISPLACEMENT AT CARBON VI. SYNTHESIS OF TRICHLOROETHYLARENES FROM BENZYLCOBALOXIMES
Benzylbis(dimethylglyoximato)pyridinecobalt(III) reacts with bromotrichloromethane at from 50 to 90 deg C in chloroform to give good yields of trichloroethylbenzene, which are higher when imidazole is present in the reaction mixture.Methyl- and polymethyl-substituted benzylbis(dimethylglyximato)pyridinecobalt(III) complexes give higher yields of the corresponding trichloroethylarenes (85-90percent), whereas 4-chlorobenzylbis(dimethylglyoximato)pyridinecobalt(III) only gives the 4-nitro-trichloroethylarene when imidazole is present during the reaciton.Similar reactions were observed with benzylcobaloximes and trichloromethanesulphonyl chloride both thermally and under irradiation by tungsten lamps through all-pyrex apparatus.The reactions are interpreted as a direct attack of the trichloromethyl radical on the α-carbon of the benzyl ligand.
Bougeard, Peter,Gupta, B. Dass,Johnson, Michael D.
p. 211 - 219
(2007/10/02)
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