Diethyl Oxalate → HCID 135705329, compound

Participants

Reaction Steps

Diethyl oxalate (350 ml.) and 5-chloro-2-aminoquinoline-3carboxamide (5.9 g., 0.0267 mole) are heated together at 170° C. for four hours. By-product water and ethanol are distilled from the reaction mixture. The dark reaction mixture is cooled, treated with hexane (300 ml.) and filtered. The brown solid is dissolved in methylene chloride:ethanol (1:1), decolorized with charcoal and concentrated to give a tan solid. The solid is recrystallized from methylene chloride-hexane. It is purified further by chromatography on silica gel using methylene chloride:ethanol (9:1) as eluant. The product, recovered by evaporation of the eluate, is recrystallized from methylene chloride-ethanol. Yield = 0.756 g. (9.3%). M.P. 278°-279° C. (dec.).

Provenance & Evidence