Regiospecific synthesis of gem -dinitro derivatives of 2-halogenocycloalka[ b ]pyridine-3,4-dicarbonitriles
作者:Oleg V. Ershov、Veronika N. Maksimova、Konstanin V. Lipin、Mikhail Yu. Belikov、Mikhail Yu. Ievlev、Victor A. Tafeenko、Oleg E. Nasakin
DOI:10.1016/j.tet.2015.06.031
日期:2015.9
A simple method for the synthesis of inaccessible gem-dinitro derivatives of pyridine is described. A wide range of 2-halogencycloalka[b]pyridine-3,4-dicarbonitriles are produced by the three-component reaction (ketone, TCNE, hydrohalic acid), side-chain nitration of latter with 60% nitric acid in a solvent-free conditions leads to the formation of gem-dinitro derivatives with high selectivity and
描述了一种合成难以获得的吡啶的宝石-二硝基衍生物的简单方法。通过三组分反应(酮,TCNE,氢卤酸),在无溶剂的情况下用60%硝酸对后者进行侧链硝化,可制得各种2-卤代环烷基[ b ]吡啶-3,4-二腈。条件导致形成具有高选择性且不干扰其他反应中心的宝石-二硝基衍生物。