Direct <i>ortho</i> Cupration: A New Route to Regioselectively Functionalized Aromatics
作者:Shinya Usui、Yuichi Hashimoto、James V. Morey、Andrew E. H. Wheatley、Masanobu Uchiyama
DOI:10.1021/ja074669i
日期:2007.12.1
electrophilic functional groups, such as cyano, amide, and halogens. Direct cupration, followed by electrophilic trapping, provided a convenient preparative method for 1,2- or 1,2,3-multisubstituted aromatic compounds. The functionalized aromatic cuprate intermediates were also found to undergo oxidation reactions very efficiently and with high regio- and chemoselectivity to afford functionalized phenol,
我们开发了一种直接区域选择性和化学选择性方法,用于使用 TMP(四甲基哌啶基)-铜酸盐(R(TMP)Cu(CN)Li2;R = 烷基、苯基或 TMP)通过去质子定向邻位铜酸盐生成官能化芳香铜酸盐化合物通过在 THF 中混合 CuCN、RLi 和四甲基哌啶锂 (LTMP) 制备。用 TMP-铜酸盐对各种官能化苯进行去质子铜化证明,可有效直接生成邻官能化铜芳香族和杂芳香族衍生物,尤其是具有亲电官能团的那些,如氰基、酰胺和卤素。直接铜化,然后进行亲电捕获,为 1,2- 或 1,2,3- 多取代芳族化合物提供了一种方便的制备方法。