magnesium sulfate; toluene-4-sulfonic acid in dichloromethane 4.75 h; Ambient temperature;
参考文献
Pilcher, Anthony S.; Hill, David K.; Shimshock, Stephen J.; Waltermire, Robert E.; DeShong, Philip
Journal of Organic Chemistry, 1992 , vol. 57, # 8 p. 2492 - 2495