Diethyl (ethoxymethylene)malonate → HCID 178469614, compound

Participants

Reaction Steps

3-Iodoaniline (8.50 mL) and diethyl ethoxymethylenemalonate (14.30 mL) are heated at 130° C. for 1 hour. The reaction is cooled to room temperature and 70 mL diphenyl ether is added. The solution is heated at 250° C. for 1.5 hours with removal of ethanol by a Dean-Stark trap. The reaction is cooled to room temperature and the resulting solid filtered, washed with hexanes, and dried. The solid is triturated in ethyl acetate to give 12.82 g of ethyl 4-hydroxy-7-iodoquinoline-3-carboxylate. A mixture of this ester (0.35 g) and 4-chlorobenzylamine (3.0 mL) are heated at 180° C. for 1 hour. The reaction is cooled to 70° C. and poured into 50 mL diethyl ether. A tan solid which crystallizes slowly out of diethyl ether is obtained. The solid is recrystallized from ethyl acetate/hexanes to give the desired product (0.22 g).

Provenance & Evidence