New 1,4-Benzodiazepin-2-one Derivatives as Gastrin/Cholecystokinin-B Antagonists.
作者:Masato SATOH、Yutaka KONDOH、Yoshinori OKAMOTO、Akito NISHIDA、Keiji MIYATA、Mitsuaki OHTA、Toshiyasu MASE、Kiyoshi MURASE
DOI:10.1248/cpb.43.2159
日期:——
A novel series of 1-aroylmethyl-1, 3-dihydro-2H-1, 4-benzodiazepin-2-one derivatives was prepared and evaluated for activity as gastrin/cholecystokinin (CCK)-B receptor antagonists. In vitro binding studies showed that some derivatives exhibited potent affinity for gastrin/CCK-B receptor and high selectivity over peripheral CCK (CCK-A) receptor. Furthermore, these compounds potently inhibited pentagastrin-induced gastric acid secretion upon intravenous administration in an in vivo model in rats. Structure-activity relationship studies of this series suggested that 1-[(R)-2, 3-dihydro-1-(2-methylphenacyl)-2-oxo-5-phenyl-1H-1, 4-benzodiazepin-3-yl]-3-(3-methylphenyl)urea (35b, YM022) was the optimal compound with IC50 values of 0.17, 0.11 and 150nM for gastrin, CCK-B and CCK-A receptors, respectively, and an ED50 value of 9.5nmol/kg (i.v.) in rats. The absolute configuration of the precursor of YM022, an (R)-3-amino-1, 3-dihydro-2H-1, 4-benzodiazepin-2-one derivative ((R)-25), was determined by X-ray crystallographic analysis of its (S)-mandelate.It would be expected that YM022, a potent and selective gastrin/CCK-B receptor antagonist, inhibits gastric acid secretion without inducing gastrin-mediated side-effects such as hypergastrinemia and hyperplasia of oxyntic mucosa.
研究人员制备了一系列新型 1-芳酰基甲基-1,3-二氢-2H-1,4-苯并二氮杂卓-2-酮衍生物,并对其作为胃泌素/胆囊收缩素(CCK)-B 受体拮抗剂的活性进行了评估。体外结合研究表明,一些衍生物对胃泌素/CCK-B 受体具有很强的亲和力,对外周 CCK(CCK-A)受体具有很高的选择性。此外,在大鼠体内模型中,这些化合物静脉注射后能有效抑制五肽胃泌素诱导的胃酸分泌。该系列化合物的结构-活性关系研究表明,1-[(R)-2, 3-二氢-1-(2-甲基苯乙酰基)-2-氧代-5-苯基-1H-1, 4-苯并二氮杂卓-3-基]-3-(3-甲基苯基)脲(35b,YM022)是最佳化合物,其 IC50 值分别为 0.对胃泌素、CCK-B 和 CCK-A 受体的 IC50 值分别为 0.17、0.11 和 150nM,对大鼠的 ED50 值为 9.5nmol/kg(静脉注射)。YM022 的前体是一种 (R)-3-氨基-1, 3-二氢-2H-1, 4-苯并二氮杂卓-2-酮衍生物((R)-25),其绝对构型是通过对其 (S)-mandelate 的 X 射线晶体学分析确定的。YM022 是一种强效的选择性胃泌素/CCK-B 受体拮抗剂,可抑制胃酸分泌,但不会引起胃泌素介导的副作用,如高胃泌素血症和胃黏膜增生。