trifluoroacetic acid in tetrachloromethane T=-40 - -35°C; Yield given. Yields of byproduct given. Title compound not separated from byproducts;
参考文献
Bogoradovskii, E. T.; Zavgorodnii, V. S.; Liepin'sh, E. E.; Petrov, A. A.
J. Gen. Chem. USSR (Engl. Transl.), 1991 , vol. 61, # 6.2 p. 1430 - 1435,1306 - 1310