Direct Carboxylation of the Diazo Group <i>ipso</i>-C(sp<sup>2</sup>)–H bond with Carbon Dioxide: Access to Unsymmetrical Diazomalonates and Derivatives
作者:Qianyi Liu、Man Li、Rui Xiong、Fanyang Mo
DOI:10.1021/acs.orglett.7b03573
日期:2017.12.15
The directcarboxylation of the ipso-C(sp2)–H bond of a diazo compound with carbondioxide under mild reaction conditions is described. This method is transition-metal-free, uses a weak base, and proceeds at ambient temperature under atmospheric pressure in carbondioxide. The carboxylation exhibits high reactivity and is amenable to subsequent diversification. A series of unsymmetrical 1,3-diester/keto/amide