Discovery of Orally Bioavailable 1,3,4-Trisubstituted 2-Oxopiperazine-Based Melanocortin-4 Receptor Agonists as Potential Antiobesity Agents
作者:Xinrong Tian、Adrian G. Switzer、Steve A. Derose、Rajesh K. Mishra、Mark G. Solinsky、Rashid N. Mumin、Frank H. Ebetino、Lalith R. Jayasinghe、Mark E. Webster、Anny-Odile Colson、Doreen Crossdoersen、Beth B. Pinney、Julie A. Farmer、Martin E. Dowty、Cindy M. Obringer、Charles A. Cruze、Melissa L. Burklow、Paula M. Suchanek、Lily Dong、Mary Kay Dirr、Russell J. Sheldon、John A. Wos
DOI:10.1021/jm800525p
日期:2008.10.9
highly basic guanidine moiety contained in potent MC4R agonists, as exemplified by 1, led to the discovery of initial nonguanidine lead 5. Propyl analog 23 was subsequently found to be equipotent to 5, whereas analogs bearing smaller and branched alkyl groups at the 3 position of the oxopiperazine template demonstrated reduced binding affinity and agonist potency for MC4R. Acylation of the NH2 group of the
一项旨在确定有效的MC4R激动剂中所含的高度碱性胍基部分的可能替代物的研究(以1为例)导致了最初的非胍基铅5的发现。随后发现丙基类似物23与5具有等价性,而类似物带有在氧杂哌嗪模板的3位上的较小和分支的烷基显示出降低的对MC4R的结合亲和力和激动剂效力。3-丙基类似物23的4F-D-Phe残基的NH2基团的酰化作用显着提高了对MC4R的结合亲和力和功能活性。具有D-Phe残基的中性和弱碱性封端基团的类似物对MC1R表现出优异的MC4R选择性,而具有氨基酸的类似物具有中等的MC4R / MC1R选择性。