1: With boron trifluoride diethyl etherate in dichloromethane
T=-78 - 20°C;
2: With hydrogenchloride; water in dichloromethane
3: With toluene-4-sulfonic acid in toluene
T=40°C; 4 h;
参考文献
Rana, Nirmal K.; Selvakumar, Sermadurai; Singh, Vinod K.
Journal of Organic Chemistry, 2010 , vol. 75, # 6 p. 2089 - 2091