ABSTRACT
The reactional ability of the glycoside center with the purpose of elaboration of the effective methods of introduction of the urea rests and its derivatives in the first position of the carbohydrate ring have been presented in this work. It was shown that the protoning of N-glycoside in the conditions of acid catalysis leads to the growth of the effective, positive charge on C1 and it increases its reactional ability with reference to attacking nucleophiles, that was confirmed by the quantum-chemical calculations.
