toluene-4-sulfonic acid in acetonitrile T=30°C; 60 h;
参考文献
Pontiggia, Rodrigo; Pontiggia, Osvaldo; Simian, Marina; Montserrat, Javier M.; Engels, Joachim W.; Iribarren, Adolfo M.
Bioorganic and Medicinal Chemistry Letters, 2010 , vol. 20, # 9 p. 2806 - 2808