反应条件
1: 88 percent / p-toluenesulfonic acid / benzene / 7 h / Heating 2: 59 percent / 1.) butyllithium; 2.) 10percent hydrochloric acid / 1.) hexane/THF, RT, 0.5 h; 2.) reflux, 2 h 3: 41 percent / boron trifluoride etherate/molecular sieve 4A / toluene / 25 h / Heating 4: 72 percent / tetrahydrofuran / RT, 1h; 40 deg C, 1 h; reflux, 2 h 5: 72 percent / potassium hydroxide / ethane-1,2-diol / 6 h / Heating View Scheme
参考文献
Chemical and Pharmaceutical Bulletin, , vol. 31, # 9 p. 3139 - 3148
