1.1: 120 °C 1.2: 95 percent / H2SO4; CF3COOH / 0.5 h / 20 °C 2.1: NaH / dimethylformamide / 0.33 h / 0 °C 2.2: 36 percent / NaH / dimethylformamide / 5 h / 0 - 20 °C View Scheme
参考文献
Seshadri; Venkateswarlu
Proceedings - Indian Academy of Sciences, Section A, 1941 , # 14 p. 297,304