New polyheterocyclic series based on 4,5,6,7-tetrahydrothieno[2,3-c]pyridine

4,8-Dimethyl-6,7,8,9-tetrahydropyrido4′,3′:4,5]thieno2,3-e]1,2,4]triazolo3,4-a]-4H-pyrimidin-5-ones, 7-methyl-2,3,6,7,8,9-hexahydropyrido4′,3′:4,5]thieno2,3-d]pyrrolo1,2-a]-1H, 10H-pyrimidin-10-one, 8-methyl-1,2,3,4,7,8,9,10-octahydropyrido4′,3′:4,5]thieno2,3-d]-11H-pyrimidin-11-one, and 9-methyl-2,3,4,5,8,9,10,11-octahydro4′,3′:4,5]thieno2,3-d]azepino-1,2-a]-1H, 12H-pyrimidin-12-one which consist four new heterocyclic ring systems were synthesized from 2-amino-3-carbethoxy-5-methyl-4,5,6,7-tetrahydrothieno2,3-c]pyridine.