Ethanol → Pirolate

Participants

Reaction Steps

An alternative route to this product comprises heating a mixture of ethyl 6,7-dimethoxy-2-aminoquinoline-3-carboxylate (1.38 g., 5.0 mM), ethyl 1-carbethoxyformimidate hydrochloride (1.82 g., 10 mM), triethylamine (5.1 g., 5.0 mM), ethanol (50 ml.) and N,N-dimethylformamide (20 ml.) on a steam bath for 17 hours. The reaction mixture is cooled and the solid which separates filtered off, triturated with hot chloroform and then recrystallized from chloroform to give 0.170 g. of product. M.P. 273°-274° C. (dec.)

Provenance & Evidence