5-Hydroxytryptamine (5-HT3) receptor antagonists. 1. Indazole and indolizine-3-carboxylic acid derivatives
作者:Jose Bermudez、Charles S. Fake、Graham F. Joiner、Karen A. Joiner、Frank D. King、Wesley D. Miner、Gareth J. Sanger
DOI:10.1021/jm00169a016
日期:1990.7
3-indolizines 7b-d and 8, and imidazo[1,5-alpha]pyridines 9 and 10, as potent 5-HT3 receptor antagonists devoid of either dopamine antagonist or gastric motility stimulatory properties. Further conformational restriction of the side chain identified quinuclidine 11 and isoquinuclidine 12 as potent 5-HT3 receptor antagonists which mimic the distorted chair conformation of the tropane with, in the case of
甲氧氯普胺(1)是一种胃动力刺激剂,是一种弱的多巴胺和5-HT3受体拮抗剂。构象限制了氮杂双环托烷形式的1的(二乙基氨基)乙基侧链产生了3,一种非常有效的胃动力刺激剂和5-HT3受体拮抗剂,但没有明显的多巴胺受体拮抗剂特性。芳香核的随后改变导致吲唑6a-h,1-吲哚并3-吲哚并酮7b-d和8以及咪唑并[1,5-α]吡啶9和10被鉴定为有效的5-HT3受体拮抗剂。缺乏多巴胺拮抗剂或胃动力刺激特性。侧链的进一步构象限制确定奎核苷11和异喹核苷12为有效的5-HT3受体拮抗剂,它们模拟了托烷的扭曲椅构象,在11的情况下,N-甲基为轴向。从这些系列中,发现6g(BRL 43694)具有强效和选择性,并已被证明是一种非常有效的止吐药,可对抗雪貂和人体内由细胞毒性药物引起的呕吐。