反应条件
1: 1.) Mg, I2, 2.) dichloro<1,3-bis(diphenylphosphino)propane>nickel(II) / 1.) Et2O, reflux, 3 h, 2.) Et2O, reflux, 2 d
2: 94 percent / ICl / CH2Cl2 / 0.67 h / Ambient temperature
3: 1.) BuLi / 1.) hexane, Et2O, -70 deg C, 1 h, 2.) hexane, Et2O, 20 deg C, 8 h
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