反应条件
1: 67 percent / polyphosphoric acid / 115 °C 2: 2.) conc. HCl, 3.) HCl-gas / 1.) THF, toluene, 65 deg C, 2 h, 2.) 1 h, 3.) 75 deg C, 1.5 h, ethanol View Scheme
参考文献
Ohishi; Hayashida; Mukai; Kimura; Nagahara
Chemical and Pharmaceutical Bulletin, 1990 , vol. 38, # 4 p. 1066 - 1068
