Efficient cross-coupling, allowing a straightforward access to congested benzophenones, between aromatic aldehydes and potassium aryltrifluoroborates, is described in the presence of a rhodium/tri-tert-butylphosphane catalyst system and acetone as cosolvent. The use of the stable phosphonium salts of tri-tert-butylphosphane prevented the use of highly oxidizable tri-tert-butylphosphane and allowed
在
铑/
三叔丁基膦烷催化剂体系和
丙酮作为助溶剂的存在下,描述了有效的交叉偶联,使芳族醛和芳基三
氟硼酸钾之间可以直接进入拥挤的
二苯甲酮。
三叔丁基膦的稳定phospho盐的使用阻止了高度可氧化的
三叔丁基膦的使用,并允许用
铑小心地控制
化学计量。