6-Chloronicotinamide → HCID 12953063, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 5 g (0.0226 mol) of 4-amino-2,5-dimethyl-3-thiophenecarboxylic acid, methyl ester and 3.5 g (0.0226 mol) of 6-chloro-3-pyridinecarboxamide (Aldrich Chemical Company) is heated in an oil bath at 180° C. for thirty minutes. The mixture is cooled, dissolved in hot pyridine, cooled, the precipitate collected and dissolved in hot methanol, activated charcoal (Darco-G60, Matheson, Coleman and Bell) is added and the hot suspension is filtered through Supercell Hyflo® (Johns-Manville). The filtrate is cooled to give 0.2 g of 1,3-dimethyl-10-oxo-10H-pyrido[1,2-a]thieno[3,4-d]pyrimidine-7-carboxamide with methanol (1:0.125); mp 272°-275° C. after recrystallization from methanol.

Provenance & Evidence