New Gilman-type lithium cuprate from a copper(II) salt: synthesis and deprotonative cupration of aromatics
作者:Tan Tai Nguyen、Floris Chevallier、Viatcheslav Jouikov、Florence Mongin
DOI:10.1016/j.tetlet.2009.09.100
日期:2009.12
including heterocycles (anisole, 1,4-dimethoxybenzene, thiophene, furan, 2-fluoropyridine, 2-chloropyridine, 2-bromopyridine, and 2,4-dimethoxypyrimidine) was realized in tetrahydrofuran at room temperature using the Gilman-type amido-cuprate (TMP)2CuLi in situ prepared from CuCl2·TMEDA through successive addition of 1 equiv of butyllithium and 2 equiv of LiTMP. The intermediate lithium (hetero)arylcuprates
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 arylhalides was optimized and allowed the synthesis of different arylderivatives in medium to good yields.