Nickel-Catalyzed Reductive Arylation of Redox Active Esters for the Synthesis of α-Aryl Nitriles: Investigation of a Chlorosilane Additive
作者:Nicholas W. M. Michel、Alexis L. Gabbey、Racquel K. Edjoc、Emmanuel Fagbola、Jonathan M. E. Hughes、Louis-Charles Campeau、Sophie A. L. Rousseaux
DOI:10.1021/acs.joc.3c02354
日期:——
iodoarenes for the synthesis of α-aryl nitriles is described. The NHP ester substrate is derived from cyanoacetic acid, which allows for a modular synthesis of substituted α-aryl nitriles, an important scaffold in the pharmaceutical sciences. The reaction exhibits a broad scope, and many functional groups are compatible under the reaction conditions, including complex highly functionalized medicinal agents
描述了氧化还原活性 N-羟基邻苯二甲酰亚胺 (NHP) 酯和碘芳烃合成 α-芳基腈的镍催化还原交叉偶联。NHP 酯底物来源于氰乙酸,允许取代 α-芳基腈的模块化合成,这是制药科学中的重要支架。该反应范围广泛,许多官能团在反应条件下相容,包括复杂的高度官能化药物。机理研究表明,NHP 酯还原和脱羧为反应性自由基中间体是通过氯硅烷添加剂和 Zn 粉尘的组合完成的。我们证明了化学计量氯硅烷对于产物形成至关重要,并且氯硅烷的作用超出了金属还原剂的活化。