boron trifluoride diethyl etherate in neat (no solvent) T=25°C;
参考文献
Doyle, Michael P.; Buhro, William E.; Davidson, James G.; Elliott, Robert C.; Hoekstra, James W.; Oppenhuizen, Mark
Journal of Organic Chemistry, 1980 , vol. 45, # 18 p. 3657 - 3664
McKay, William R.; Proctor, George R.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1981 , p. 2443 - 2450