Synthesis of imidazo[1,2- a]pyrazine and imidazo[1,2- a]pyrimidine derivatives.

Synthetic approaches to the construction of bicyclic systems containing the imidazole nucleus have been considered. Methods for obtaining derivatives of imidazo[1,2- a]pyrazine and imidazo[1,2- a]pyrimidine have been studied, and methods have been developed for catalytic hydrogenation of these compounds. Partial reduction of the imidazole ring on imidazo[1,2- a]pyrimidine hydrogenation has been discovered for the first time. [ABSTRACT FROM AUTHOR]