Ethyl cyanoacetate → HCID 23153938, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of ethyl cyanoacetate (7.9 ml) in N,N-dimethylacetamide (150 ml) was added sodium hydride (an oily, about 66%, 3.0 g), and added a solution of 1-(4-methoxybenzyl)2H-3,1-benzoxazine-2,4(1H)-dione (21.0 g) in N,N-dimethylacetamide (50 ml), stirred at 120° C. for 19 hours. After cooling, the reaction mixture was concentrated under reduced pressure. Water was added to the residue and the mixture was washed with ether. The aqueous layer was acidified by adding 1N hydrochloric acid. The precipitated solid was collected by filtration, washed with water, and dried to obtain the target compound (8.1 g).

Provenance & Evidence