1: With 3,3-dimethyl-butan-2-one in tetrahydrofuran T=20°C; 3 h; Cooling with ice; 2: With trifluoroacetic acid in tetrahydrofuran T=20°C; 48 h; TimeTemperature;
参考文献
Fu, Ying; Yang, Yanshou; Huegel, Helmut M.; Du, Zhengyin; Wang, Kehu; Huang, Danfeng; Hu, Yulai
Organic and Biomolecular Chemistry, 2013 , vol. 11, # 27 p. 4429 - 4432