toluene-4-sulfonic acid in methanol; acetone
T=20°C; 16 h;
参考文献
Vlahov, Iontcho R.; Santhapuram, Hari Krishna R.; You, Fei; Wang, Yu; Kleindl, Paul J.; Hahn, Spencer J.; Vaughn, Jeremy F.; Reno, Daniel S.; Leamon, Christopher P.
Journal of Organic Chemistry, 2010 , vol. 75, # 11 p. 3685 - 3691