反应条件
1: 1.) potassium tert-butoxide / 1.)DMF, 2.) 20 to 90 deg C, 2 h, 25 deg C, 16 h, to 10 deg C
2: 70 percent / 70percent perchloric acid / acetic acid / 1 h / Heating
3: 94 percent / 10percent palladium on carbon, H2 / methanol / 2.) reflux, 72 h
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