Synthesis of a new class of 2,3-dihydro-2-oxo-1H-benzimidazole-1-carboxylic acid derivatives as highly potent 5-HT3 receptor antagonists
作者:Marco Turconi、Massimo Nicola、Myrna Gil Quintero、Luciano Maiocchi、Rosella Micheletti、Ettore Giraldo、Arturo Donetti
DOI:10.1021/jm00170a009
日期:1990.8
synthesized and evaluated for 5-HT3 antagonistic activity in a radioligand binding assay ([3H]ICS 205930) and in the 5-HT-induced von Bezold-Jarisch reflex in the rat. It was found that endo-substituted azabicycloalkyl derivatives (e.g. 7a, 12a, 12b) were much more active than the corresponding exo analogues (e.g. 7b, 12h, 12i) or azacycloalkyl compounds. Amidic derivatives 12a, 12b, 12c, 12e, 13b, and
合成了一系列含有碱性氮杂环或氮杂双环烷基部分的2,3-二氢-2-氧代-1H-苯并咪唑-1-羧酸酯和酰胺,并在放射性配体结合测定中评估了其对5-HT3的拮抗活性([ 3H] ICS 205930)和5-HT诱导的大鼠von Bezold-Jarisch反射。发现内取代的氮杂双环烷基衍生物(例如7a,12a,12b)比相应的exo类似物(例如7b,12h,12i)或氮杂环烷基化合物具有更高的活性。事实证明,酰胺衍生物12a,12b,12c,12e,13b和13c的活性比相应的酯衍生物7a,11a,7c,7d,8a和8b高约10倍。特别是化合物12a(DA 6215)在结合试验中的Ki = 3.8 nM,在von Bezold-Jarisch反射试验中的ED50 = 1 nM / kg iv,活性与参考化合物2(ICS 205930,Ki = 2 nM,ED50 = 2.1 nM / kg)相当