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Bioorg Med Chem. 2012 Nov 15;20(22):6559-78. doi: 10.1016/j.bmc.2012.09.028. Epub 2012 Sep 23.

Synthesis and structure-activity relationships of 8-substituted-2-aryl-5-alkylaminoquinolines: Potent, orally active corticotropin-releasing factor-1 receptor antagonists.

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  • 1Medicinal Chemistry, Tsukuba Research Laboratories, Eisai Co., Ltd, 5-1-3 Tokodai, Tsukuba-shi, Ibaraki, Japan. k5-takeda@hhc.eisai.co.jp

Abstract

We previously reported a series of 8-methyl-2-aryl-5-alkylaminoquinolines as a novel class of corticotropin-releasing factor-1 (CRF(1)) receptor antagonists. A critical issue encountered for this series of compounds was low aqueous solubility at physiological pH (pH 7.4). To address this issue, derivatization at key sites (R(2), R(3), R(5), R(5'), and R(8)) was performed and the relationships between structure and solubility were examined. As a result, it was revealed that introduction of a methoxy substituent at the C(8) position had a positive impact on the solubility of the derivatives. Consequently, through in vivo and in vitro biological studies, compound 21d was identified as a potent, orally active CRF(1) receptor antagonist with improved physicochemical properties.

Copyright © 2012 Elsevier Ltd. All rights reserved.

PMID:
23062820
[PubMed - indexed for MEDLINE]
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