6-Chloronicotinamide → HCID 12862362, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 6.0 g (0.038 mol) of 6-chloro-3-pyridinecarboxamide (Aldrich Chemical Company) and 10.0 g (0.054 mol) of 2-amino-5-methyl-3-thiophenecarboxylic acid, ethyl ester (Chemische Berichte, Vol. 99, pages 94-100, 1966) is heated in an oil bath at 185° C. for one hour then at 135°-140° C. for sixteen hours and finally at 195° C. for six hours. The mixture is cooled and then suspended in hot chloroform and filtered to give 0.6 g of 2-methyl-4-oxo-4H-pyrido[1,2-a]thieno[2,3-d]pyrimidine-7-carboxamide; mp 350°-354° C. after recrystallization from pyridine.

Provenance & Evidence