6-Chloronicotinic acid → HCID 12862352, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-amino-5-propyl-3-thiophenecarboxylic acid, ethyl ester, 7.4 g (0.035 mol) and 6-chloro-3-pyridinecarboxylic acid (Aldrich Chemical Company), 6.4 g (0.041 mol) is heated in an oil bath at 180° C. for two hours. The mixture is cooled, extracted with hot chloroform and the residue is dissolved in hot pyridine, cooled and 0.45 g of 4-oxo-2-propyl-4H-pyrido[1,2-a]thieno[2,3-d]pyrimidine-7-carboxylic acid is collected; mp 250°-254° C. after recrystallization from pyridine.

Provenance & Evidence