toluene-4-sulfonic acid in dichloromethane
Heating;
参考文献
Fokin, Andrey A.; Butova, Ekaterina D.; Chernish, Lesya V.; Fokina, Natalie A.; Dahl, Jeremy E. P.; Carlson, Robert M. K.; Schreiner, Peter R.
Organic Letters, 2007 , vol. 9, # 13 p. 2541 - 2544