Synthesis and biological evaluation of isoxazoline derivatives as potent M₁ muscarinic acetylcholine receptor agonists

Bioorganic & Medicinal Chemistry Letters
Minghua HuangGyochang Keum

Abstract

A series of azacyclic compounds substituted with isoxazole and 5-substituted isoxazolines were synthesized as acyclic modifications of the oxime class M1 mACh receptor agonist. Among them, 3-(tetrahydropyrin-3-yl)-5-(2-pyrrolodin-1-yl)isoxazoline compound 4f displayed potent and selective M1 mACh receptor agonist activity in the functional calcium mobilization assay (EC50=31 nM). Introduction of 2-pyrrolidinone and 3-tetrahydropyridine groups are pivotal to the high potency. Moreover, 4f was found to facilitate non-amyloidogenic amyloid precursor protein (APP) processing by significantly increasing ERK1/2 phosphorylation and sAPPα secretion, known disease-modifying effects related to M1 mAChR agonists in Alzheimer's disease (AD).

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Citations

Jan 1, 2018·Medicinal Chemistry Research : an International Journal for Rapid Communications on Design and Mechanisms of Action of Biologically Active Agents·Neetu Agrawal, Pradeep Mishra

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