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Updated: Mar 11, 2026

Facile Preparation of 4-Substituted Quinazoline Derivatives
Published on: February 15, 2016
The discovery of quinoline based single-ligand human H1 and H3 receptor antagonists
Panayiotis A Procopiou1, Rachael A Ancliff1, Paul M Gore1
1Medicinal Chemistry, GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, United Kingdom.
Abstract:
A novel series of potent quinoline-based human H1 and H3 bivalent histamine receptor antagonists, suitable for intranasal administration for the potential treatment of allergic rhinitis associated nasal congestion, were identified. Compound 18b had slightly lower H1 potency (pA2 8.8 vs 9.7 for the clinical goldstandard azelastine), and H3 potency (pKi 9.1vs 6.8 for azelastine), better selectivity over α1A, α1B and hERG, similar duration of action, making 18b a good back-up compound to our previous candidate, but with a more desirable profile.
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