1: in tetrahydrofuran T=20°C; 16 h; Inert atmosphere; 2: With oxygen in tetrahydrofuran 3: With hydrogenchloride; acetic acid in water 0.333333 h; Reflux;
参考文献
Huber, Stefan M.; Hennig, Andre; Puehlhofer, Frank G.; Weiss, Robert
Journal of Heterocyclic Chemistry, 2009 , vol. 46, # 3 p. 421 - 427