Amine-free melanin-concentrating hormone receptor 1 antagonists: Novel 1-(1H-benzimidazol-6-yl)pyridin-2(1H)-one derivatives and design to avoid CYP3A4 time-dependent inhibition
作者:Hideyuki Igawa、Masashi Takahashi、Mikio Shirasaki、Keiko Kakegawa、Asato Kina、Minoru Ikoma、Jumpei Aida、Tsuneo Yasuma、Shoki Okuda、Yayoi Kawata、Toshihiro Noguchi、Syunsuke Yamamoto、Yasushi Fujioka、Mrinalkanti Kundu、Uttam Khamrai、Masaharu Nakayama、Yasutaka Nagisa、Shizuo Kasai、Tsuyoshi Maekawa
DOI:10.1016/j.bmc.2016.04.011
日期:2016.6
(MCH) is an attractive target for antiobesity agents, and numerous drug discovery programs are dedicated to finding small-molecule MCH receptor 1 (MCHR1) antagonists. We recently reported novel pyridine-2(1H)-ones as aliphatic amine-free MCHR1 antagonists that structurally featured an imidazo[1,2-a]pyridine-based bicyclic motif. To investigate imidazopyridine variants with lower basicity and less potential
黑色素浓缩激素(MCH)是抗肥胖药的诱人靶标,许多药物发现计划致力于发现小分子MCH受体1(MCHR1)拮抗剂。我们最近报道了新型吡啶2(1 H)-作为无脂肪胺的MCHR1拮抗剂,其结构上具有基于咪唑并[1,2- a ]吡啶的双环基序。为了研究具有较低碱性和抑制细胞色素P450 3A4(CYP3A4)潜力较小的咪唑并吡啶变体,我们设计了带有多个较少碱性双环基序的吡啶-2(1 H)-。在这些化合物中,带有1 H-苯并咪唑基序的铅化合物6a对MCHR1与相应的咪唑并吡啶衍生物具有相当的结合亲和力1。优化6a可得到一系列有效的噻吩衍生物(6q - u);然而,大多数被发现引起CYP3A4的时间依赖性抑制(TDI)。由于噻吩的生物活化作用形成亚砜或环氧化物物种被认为是CYP3A4 TDI的主要原因,因此我们在噻吩上引入了吸电子基团,发现环上的CF 3基团或与硫原子相邻的Cl有助于防止CYP3A4