toluene-4-sulfonic acid; copper(II) sulfate in dichloromethane
3 h; Heating;
参考文献
Cai, Jiaqiang; Davies, Alwyn G.; Schiesser, Carl H.
Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999), 1994 , # 6 p. 1151 - 1156
