1-(3-Cyanobenzylpiperidin-4-yl)-5-methyl-4-phenyl-1,3-dihydroimidazol-2-one: A Selective High-Affinity Antagonist for the Human Dopamine D4 Receptor with Excellent Selectivity over Ion Channels
摘要:
After the requirement of pseudocycle formation in the ureas 3 and 7 for hD(4) binding and selectivity was confirmed, structural hybridization with the known hD(4) ligand 2 led to the design and identification of the lead 4-(2-oxo-1,3-dihydroimidazol-2-yl)piperidine . Optimization studies were carried out on 8 with the aim of achieving 1000-fold selectivity for hD(4) over all other receptors while retaining the good pharmacokinetic properties of the lead. After initial preparation of 8 as a minor component in a low-yielding reaction, a novel and regioselective "four-step/one-pot'' procedure was developed which proved to be applicable to rapid investigation of the SAR of the 1,3-dihydroimidazol-2-one ring. Various changes to substituents attached to the 3-, 4-, or B-position of the 1,3-dihydroimidazol-2-one core of 8 did not significantly improve selectivity for hD(4) over hD(2) and hD(3). Greater Selectivity( > 1000-foId) was ultimately achieved by meta substitution of the benzyl group of 8 with various substituents. Compounds 28, 31, and 32 all possess the required selectivity for hD(4) over the other dopamine subtypes, but only 32 has > 1000-fold selectivity over-all the key counterscreens we tested against. Compound 32 is an antagonist at hD(4) and has a good pharmacokinetic profile in the rat, with excellent estimated in vivo receptor occupancy, thus making it a potentially useful pharmacological tool to investigate the role of the D-4 receptor.
DOI:
10.1021/jm991029k
作为产物:
描述:
4-氨基-1-苄基哌啶 、 苯甲酰异氰酸脂 在
ice 、 乙醚 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以to give the required product as a white solid 15.4 g (87%)的产率得到4-(Phenylcarbonylaminocarbonyl)amino-1-benzyl-piperidine
参考文献:
名称:
Imidazolone and oxazolone derivatives as dopamine antagonists
Imidazolone and oxazolone derivatives as dopamine antagonists
申请人:Merck, Sharp & Dohme, Ltd.
公开号:US05698573A1
公开(公告)日:1997-12-16
A class of imidazolone and oxazolone derivatives of Structure I, ##STR1## wherein X represents oxygen or N--R.sup.1 ; Q represents a substituted five-, six- or seven-membered monocyclic heteroaliphatic ring which contains one nitrogen atom as the sole heteroatom and is linked to the imidazolone or oxazolone ring via a carbon atom; R.sup.1 represents hydrogen or C.sub.1-6 alkyl; and one of R.sup.2 and R.sup.3 represents hydrogen or C.sub.1-6 alkyl and the other of R.sup.2 and R.sup.3 represents cycloalkyl or a group of formula (i), (ii) or (iii): ##STR2## in which Z represents oxygen, sulphur or NH; R.sup.4, R.sup.5 and R.sup.6 independently represent hydrogen, a hydrocarbon group or a heterocyclic group wherein the hydrocarbon group and heterocyclic group are as defined in the specification; or a pharmaceutically acceptable salt or prodrug thereof, which are ligands for dopamine receptor subtypes within the brain and are therefore of use in the treatment and/or prevention of disorders of the dopamine system, such as schizophrenia.
I. 结构的咪唑酮和噁唑酮衍生物类,其中X代表氧或N--R.sup.1;Q代表一种取代的五、六或七元杂环脂肪环,其中含有一个氮原子作为唯一杂原子,并通过一个碳原子连接到咪唑酮或噁唑酮环上;R.sup.1代表氢或C.sub.1-6烷基;R.sup.2和R.sup.3中的一个代表氢或C.sub.1-6烷基,另一个代表环烷基或式(i)、(ii)或(iii)的基团:##STR2## 其中Z代表氧、硫或NH;R.sup.4、R.sup.5和R.sup.6独立地代表氢、烃基或杂环基,其中烃基和杂环基如规范中定义;或其药学上可接受的盐或前药,它们是大脑内多巴胺受体亚型的配体,因此可用于治疗和/或预防多巴胺系统紊乱,如精神分裂症。
IMIDAZOLONE AND OXAZOLONE DERIVATIVES AS DOPAMINE ANTAGONISTS
申请人:MERCK SHARP & DOHME LTD.
公开号:EP0719264B1
公开(公告)日:1997-12-29
US5698573A
申请人:——
公开号:US5698573A
公开(公告)日:1997-12-16
1-(3-Cyanobenzylpiperidin-4-yl)-5-methyl-4-phenyl-1,3-dihydroimidazol-2-one: A Selective High-Affinity Antagonist for the Human Dopamine D<sub>4</sub> Receptor with Excellent Selectivity over Ion Channels
作者:Robert W. Carling、Kevin W. Moore、Christopher R. Moyes、Elizabeth A. Jones、Katrine Bonner、Frances Emms、Rosemary Marwood、Shil Patel、Smita Patel、Alan E. Fletcher、Margaret Beer、Bindi Sohal、Andrew Pike、Paul D. Leeson
DOI:10.1021/jm991029k
日期:1999.7.1
After the requirement of pseudocycle formation in the ureas 3 and 7 for hD(4) binding and selectivity was confirmed, structural hybridization with the known hD(4) ligand 2 led to the design and identification of the lead 4-(2-oxo-1,3-dihydroimidazol-2-yl)piperidine . Optimization studies were carried out on 8 with the aim of achieving 1000-fold selectivity for hD(4) over all other receptors while retaining the good pharmacokinetic properties of the lead. After initial preparation of 8 as a minor component in a low-yielding reaction, a novel and regioselective "four-step/one-pot'' procedure was developed which proved to be applicable to rapid investigation of the SAR of the 1,3-dihydroimidazol-2-one ring. Various changes to substituents attached to the 3-, 4-, or B-position of the 1,3-dihydroimidazol-2-one core of 8 did not significantly improve selectivity for hD(4) over hD(2) and hD(3). Greater Selectivity( > 1000-foId) was ultimately achieved by meta substitution of the benzyl group of 8 with various substituents. Compounds 28, 31, and 32 all possess the required selectivity for hD(4) over the other dopamine subtypes, but only 32 has > 1000-fold selectivity over-all the key counterscreens we tested against. Compound 32 is an antagonist at hD(4) and has a good pharmacokinetic profile in the rat, with excellent estimated in vivo receptor occupancy, thus making it a potentially useful pharmacological tool to investigate the role of the D-4 receptor.