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Updated: Jul 19, 2026

Facile Preparation of 4-Substituted Quinazoline Derivatives
Published on: February 15, 2016
8-Aminoquinolines as anticoccidials--II
R E Armer1, J S Barlow, C J Dutton
1Animal Health Discovery, Pfizer Central Research, Sandwich, Kent, U.K.
Abstract:
During a chemistry program aimed at finding a novel analogue of pentaquine with improved in vivo activity, a number of hypotheses concerning the way this drug acts in the chicken were investigated. Consideration of the products of monoamine oxidase metabolism of pentaquine suggested that pentaquine aldehyde is the likely active metabolite. Although isolation of this unstable compound was not possible, oxime and cyclic acetal and ketal derivatives were obtained and shown to possess in vitro anticoccidial activity.
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