boron tribromide in dichloromethane T=0 - 20°C; 2 h;
参考文献
Marwah, A. K.; Marwah, Padma; Rao, G. Shankar; Trivedi, B. S.; Rao, B. E.; et al.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1995 , vol. 34, # 3 p. 197 - 200