Deprotonative Metalation of Aromatic Compounds by Using an Amino-Based Lithium Cuprate
作者:Tan Tai Nguyen、Nada Marquise、Floris Chevallier、Florence Mongin
DOI:10.1002/chem.201100990
日期:2011.9.5
employed to attempt the interception of the generated aryl cuprates, aroyl chlorides, iodomethane, and diphenyl disulfide efficiently reacted. In addition, different oxidative agents were identified to afford symmetrical biaryls. Finally, palladium‐catalyzed coupling with aryl halides was optimized and allowed the synthesis of different aryl derivatives in medium to good yields.
以2,4-二甲氧基嘧啶和2-甲氧基吡啶为底物,以苯甲酰氯为亲电子试剂,对基于氨基的铜酸锂对芳香族化合物的去质子化进行了优化。[(tmp)2 CuLi](+2 LiCl)(tmp = 2,2,6,6-四甲基哌啶子基)被确定为最佳试剂,其应用范围已扩展到苯甲醚,1,4-二甲氧基苯,其他取代的吡啶,呋喃,噻吩及其衍生物和N -Boc-吲哚(Boc =叔-丁氧羰基)。在试图拦截所生成的芳基铜酸酯的亲电试剂中,芳酰氯,碘甲烷和二苯基二硫化物有效地反应了。另外,鉴定出不同的氧化剂以提供对称的联芳基。最后,优化了钯催化与芳基卤化物的偶联,并以中等收率合成了不同的芳基衍生物。