Orally active PDE4 inhibitor with therapeutic potential

European Journal of Medicinal Chemistry
Hiroshi OchiaiMasaaki Toda

Abstract

Based on the promising results obtained by the clinical trial of Ariflo, further optimization of the spatial arrangement of the three pharmacophores (the carboxylic acid moiety, nitrile moiety and 3-cyclopentyloxy-4-methoxyphenyl moiety) in the structure of Ariflo 1 was attempted using a bicyclo[3 ?3 ?0]octane template with more stereochemical diversity than the cyclohexane template of Ariflo 1. Biological evaluation of the decyanated analogs and further optimization of the cyclopentyloxy moiety of 2a-b were also performed. Among the compounds tested, 2a, 7a-b and 12a were found to be orally active and were estimated to have therapeutic potential based on cross-species and same-species comparisons. The structure-activity relationships (SARs) of these compounds were investigated and pharmacokinetic data for 2a and 7b were also obtained by single-dose studies in rats.

Citations

Dec 28, 2012·Journal of the American Chemical Society·Gregory L AdamsAmos B Smith
Dec 31, 2008·The Journal of Organic Chemistry·Arif Baran, Metin Balci
May 16, 2007·Journal of the American Chemical Society·Robert W HuigensChristian Melander

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