Synthesis of 5-methyl-4-oxo-2-(coumarin-3-yl)-N-aryl-3,4-dihydrothieno[2,3- d]-pyrimidine-6-carboxamides
Possible approaches to synthesis of 5-methyl-4-oxo-2- (coumarin-3-yl)-N- aryl-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxamides 4 have been discussed. It is shown that the preferable approach is cyclization of 2-iminocoumarin-3- carboxamides 1, utilizing
Kovalenko, Sergiy M.,Vlasov, Sergiy V.,Chernykh, Valentin P.