tetrafluoroboric acid in dichloromethane
T=25°C; 7 h;
参考文献
Francisco, Cosme G.; Hernandez, Rosendo; Leon, Elisa I.; Salazar, Jose A.; Suarez, Ernesto
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1990 , # 9 p. 2417 - 2427