Site-Selective Silylation of Aliphatic C–H Bonds Mediated by [1,5]-Hydrogen Transfer: Synthesis of α-Sila Benzamides
作者:Pei Liu、Jinghua Tang、Xiaoming Zeng
DOI:10.1021/acs.orglett.6b02784
日期:2016.11.4
reported. This reaction occurs selectively at the α-position of benzamides with a combination of tert-butylmagnesium chloride and a catalytic amount of 4,4′-di-tert-butylbipyridine (dtbpy) ligand and provides a facile route for the creation of biologically interesting α-sila benzamides. Late-stage functionalization of the incorporated silyl moieties facilitates the synthesis of N-formyl, cis-enamine, β-hydroxyl
报道了由[1,5]-氢转移介导的C(sp 3)-H键的位点选择性甲硅烷基化的第一个例子。该反应选择性地在苯甲酰胺的α-位与叔丁基氯化镁和催化量的4,4'-二叔丁基联吡啶(dtbpy)配体结合而发生,并提供了一条容易的途径来产生具有生物学意义的α -sila苯甲酰胺。掺入的甲硅烷基部分的后期官能化促进了N-甲酰基,顺式-烯胺,β-羟基,氨基和含吡咯的衍生物的合成。