Traceless Directing Group for Stereospecific Nickel-Catalyzed Alkyl−Alkyl Cross-Coupling Reactions
作者:Margaret A. Greene、Ivelina M. Yonova、Florence J. Williams、Elizabeth R. Jarvo
DOI:10.1021/ol300891k
日期:2012.8.17
Stereospecific nickel-catalyzed cross-coupling reactions of benzylic 2-methoxyethyl ethers are reported for the preparation of enantioenriched 1,1-diarylethanes. The 2-methoxyethyl ether serves as a traceless directing group that accelerates cross-coupling. Chelation of magnesium ions is proposed to activate the benzylic C–O bond for oxidative addition.
据报道,苄基2-甲氧基乙基醚的立体特异性镍催化的交叉偶联反应用于制备对映体富集的1,1-二芳基乙烷。2-甲氧基乙基醚用作加速交叉偶联的无痕导向基团。提出镁离子螯合可激活苄基C–O键以进行氧化加成。