boron trifluoride diethyl etherate in dichloromethane
Yield given;
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