116. Among them, 11-[3-[N-[2-(N-benzyl-N- methylamino)ethyl]-N-ethylcarbamoyl]propionyl]-5,11-dihydro-6H-pyr ido [2,3-b][1,4]benzodiazepin-6-one (68) was found to be the most potent and selective M2 muscarinic receptor antagonist in vitro. This compound also strongly inhibited the oxotremorine-induced bradycardia after intravenous administration and showed 130-fold selectivity for M2 muscarinic receptors
合成了一系列含有琥珀酰胺骨架的5,11-二氢-6H-
吡啶并[2,3-b] [1,4]苯并二氮杂-1-酮衍
生物,并评估了M1,M2和M3毒蕈碱受体的结合亲和力(体外)以及M2和M3毒蕈碱受体的拮抗活性(体内)。它们中的一些对M(2)毒蕈碱受体的结合亲和力比AF-DX 116更高。其中,11- [3- [N- [2-(N-苄基-N-甲基
氨基)乙基] -N-乙基
氨基甲酰基]丙酰基] -5,11-二氢-6H-
吡咯[2,3-b] [1,4]苯并二氮杂-1--6(68)被发现是最有效和选择性的M2毒蕈碱受体体外拮抗剂。静脉内给药后,该化合物还强烈抑制氧代苯乙
吗啡引起的心动过缓,并且在体内对M2毒蕈碱受体的选择性比M3毒蕈碱受体高130倍。