Ethyl 2-oxocyclohexanecarboxylate → HCID 14423598, compound

Participants

Reaction Steps

A mixture of 7-fluoro-6-hydrazino-4-(pyridin-2-ylmethyl)-2H-1,4-benzoxazin-3(4H)-one (1.49 g), 2-ethoxycarbonyl-cyclohexanone (0.9 g) and ethanol (20 ml) was admixed with a catalytic amount of sodium ethoxide, and heated under reflux for 5 hours. The reaction mixture was distilled to remove the ethanol therefrom, admixed with toluene (30 ml), heated under reflux for 10 minutes, cooled to a temperature of 0° to 10° C., and filtered. The solid portion thus obtained was washed with n-hexane, and dried, so that the aimed compound, i.e. 7-fluoro-6-(3,3a,4,5,6,7-hexahydro-2H-indazole-3-on-2-yl)-4-(pyridin-2-ylmethyl)-2H-1,4-benzoxazin-3(4H)-one (1.24 g) was obtained. m.p. 216°-219° C.

Provenance & Evidence