A challenging synthetic approach to phosphonium ylide-betaines of the pyrimidine series
作者:Luc Van Meervelt、Oleg B. Smolii、Nikolai I. Mishchenko、Dmitrii B. Shakhnin、Evgenii A. Romanenko、Boris S. Drach
DOI:10.1016/0040-4020(96)00425-5
日期:1996.6
several types of phosphonium ylide-betaines of the pyrimidine series, the structure of which was established by chemical transformations and X-ray diffraction analysis. Despite the mesomeric character of these heterocyclic nucleophilic agents, they are alkylated in a regioselective manner, which proves this approach to be important for the synthesis of non-phosphorylated pyrimidine derivatives, which
可用的内鎓盐-C̄HCN与酰基异氰酸酯及其硫代类似物的加合物进行易环化,在甲醇中由氯化氢促进,得到高产率的2-烷基(芳基)-4-羟基(巯基)-6-氧代-1,6 -二氢嘧啶-5-基-三苯基-氯化物适用于制备嘧啶系列的几种类型的内酯-甜菜碱,其结构通过化学转化和X射线衍射分析确定。尽管这些杂环亲核试剂具有介观特性,但它们仍以区域选择性方式烷基化,这证明该方法对于合成非磷酸化嘧啶衍生物非常重要,否则很难获得。