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Dihydropyridine neuropeptide Y Y1 receptor antagonists 2. bioisosteric urea replacements
Graham S Poindexter1, Marc A Bruce, J Guy Breitenbucher
1Pharmaceutical Research Institute, Bristol-Myers Squibb Co., 5 Research Parkway, Wallingford, CT 06492-7660, USA. graham.poindexter@bms.com
Abstract:
Structure-activity studies around the urea linkage in BMS-193885 (4a) identified the cyanoguanidine moiety as an effective urea replacement in a series of dihydropyridine NPY Y(1) receptor antagonists. In comparison to urea 4a (K(i)=3.3 nM), cyanoguanidine 20 (BMS-205749) displayed similar binding potency at the Y(1) receptor (K(i)=5.1 nM) and full functional antagonism (K(b)=2.6 nM) in SK-N-MC cells. Cyanoguanidine 20 also demonstrated improved permeability properties in Caco-2 cells in comparison to urea 4a (43 vs 19 nm/s).
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