toluene-4-sulfonic acid in diethyl ether
Title compound not separated from byproducts;
参考文献
Louw, Robert; Vermeeren, Hans P.W.; Vogelzang, Martijn W.
Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999), 1983 , # 12 p. 1875 - 1880