catalyzed transformations of O-acyl oximes to various N-heterocycles are well established. Herein, we report a catalyst free, oxime carboxylate based, three-component condensation method to access mono- and disubstituted pyrimidines. A broad range of substituted pyrimidines were prepared in moderate to excellent yields. Control experiments reveal that in situ generated formamidine is the key intermediate.
O-酰基
肟向各种N-杂环的过渡
金属或
碘催化的转化是公认的。在本文中,我们报道了一种无催化剂,基于
肟羧酸盐的三组分缩合方法,可用于获得单取代和二取代的
嘧啶。制备了各种取代的
嘧啶,它们的产率中等至优异。对照实验表明,原位生成的甲am是关键中间体。