Reaction of trifluoroacetylchromenes with 6-aminouracils. Synthesis of pyrido[2,3-d]pyrimidines-1,3-dimethyluracil and 6-aminothiouracil afforded
a number of pyrido[2,3-d]pyrimidine derivatives
Ortho-Quinone methides as key intermediates in cascade heterocyclizationsDevelopment of new methods of heterocyclic synthesis is still
a topical issue. In this connection
Classification of linear relaxational models of two-phase filtrationA classification of the linear relaxational models of two-phase filtration is given. Five types
PROBLEMS OF INVESTIGATING CRIMES COMMITTED BY MIGRANTS. The difficulties encountered in the investigation of crimes committed by migrants are outlined.
A number