反应条件
1: 1) BuLi / 1) THF, hexane, -78 deg C, 1 h, 2) THF, -78 deg C, 2 h, then rt, 15 h
2: BF3*OEt2 / tetrahydrofuran / Ambient temperature
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参考文献
Katritzky, Alan R.; Afridi, Amir S.; Kuzmierkiewicz, Wojciech
Helvetica Chimica Acta, 1991 , vol. 74, # 8 p. 1931 - 1935
