2-Chloro-6,7-dimethoxy-4-quinazolinamine → HCID 131712025, compound

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Reaction Steps

4-Amino-2-chloro-6,7-dimethoxyquinazoline (24.9 g) and 3-(4-piperidinyl)propionic acid, hydrochloride (20 g) in n-butanol (1000 ml) were stirred under reflux for 20 hours. The hot suspension was filtered and the insoluble material discarded. The filtrate was cooled in ice/water, the precipitated solid collected and the filtrate evaporated in vacuo. The resulting solid and the precipitated solid were combined and crystallised from isopropanol to give 4-amino-2-[4-(2-{n-butoxycarbonyl}ethyl)piperidino]-6,7-dimethoxyquinazoline, hydrochloride (27.0 g) with m.p. 250°-252°.

Provenance & Evidence