Journal
BIOORGANIC & MEDICINAL CHEMISTRY
Volume 14, Issue 16, Pages 5729-5741Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmc.2006.04.012
Keywords
follicle-stimulating hormone; FSH; FSH receptor agonist; thiazolidinone
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We prepared analogs of potent thiazolidinone-based follicle-stimulating hormone (FSH) agonists 1, that is, 3 that contained an additional 5-alkyl substituent. This extra substituent was added to reduce synthetic problems that arose during preparation of analogs of 1. These compounds (3) were evaluated in a Chinese hamster ovary (CHO) cell line that expressed recombinant human FSH receptor (FSHR) and a luciferase reporter gene regulated by a cAMP response element (CRE). Selected compounds were also tested on a CHO-cell line that over expressed the FSHR for the ability to induce cAMP production. When the 5-alkyl substituent was a methyl group as in analog 16a, similar FSH activity (i.e., EC50 = 51 nM, 100% efficacy relative to hFSH) to the analogous 5-hydrogen series compound (e.g., 2) was observed; thus, proving that a small 5-alkyl substituent was well tolerated. New derivatives of 3, in which the potentially hydrolytically labile secondary amide function of 1 (-CONH-) was modified to other moieties (e.g., -CH2NH-, -CH2S-, and -CH2O-CONH-), were also prepared and evaluated. These congeners (namely 21, 22, and 24) also displayed good potency in the CRE-luciferase assay. (c) 2006 Elsevier Ltd. All rights reserved.
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