1: With toluene-4-sulfonic acid; ethylene glycol in toluene Heating; 2: With water; toluene-4-sulfonic acid in acetone Heating; 3: With triethylsilane; trifluoroacetic acid in benzene
参考文献
Hanada, Keisuke; Miyazawa, Norio; Ogasawara, Kunio
Chemical and pharmaceutical bulletin, 2003 , vol. 51, # 1 p. 104 - 106
