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 phosphoniumylide-betaines of the pyrimidineseries, 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