Design, syntheses, and structure–activity relationships of novel NPY Y5 receptor antagonists: 2-{3-Oxospiro[isobenzofuran-1(3H),4′-piperidin]-1′-yl}benzimidazole derivatives
摘要:
Design, syntheses, and structure-activity relationships of a novel class of 2-{3-oxospiro[isobenzofuran-1(3H),4'-piperidin]-1'-yl}benzimidazole NPY Y5 receptor antagonists are described. The benzimidazole structures were newly designed based on the urea linkage of our prototype Y5 receptor antagonists (2 and 3). By optimizing substituents on the benzimidazole core part of the lead compound 5a, we were able to develop a potent, orally available, and brain-penetrable Y5 selective antagonist (5k). Crown Copyright (C) 2008 Published by Elsevier Ltd. All rights reserved.
A visible-light-induced three-component sulfonyl-heteroarylation of vinylethers with sulfinates and five-membered heteroaryl chlorides is reported. This protocol proceeds via a photoinduced electron transfer process of electron-donor-acceptor complex between sulfinates and heteroaryl chlorides, enabling facile excess to β-sulfonyl and β-fluoromethyl α-oxy alkyl heteroaromatics under mild and catalyst-free