Potential antipsychotic agents. 9. Synthesis and stereoselective dopamine D-2 receptor blockade of a potent class of substituted (R)-N-[(1-benzyl-2-pyrrolidinyl)methyl]benzamides. Relations to other side chain congeners
作者:Thomas Hoegberg、Peter Stroem、Tomas De Paulis、Birgitta Stensland、Ingeborg Csoeregh、Kerstin Lundin、Haakan Hall、Sven Ove Oegren
DOI:10.1021/jm00107a012
日期:1991.3
of substituted benzamides with three types of side chains, i.e. (R)-(1-benzyl-2-pyrrolidinyl)methyl, (S)-(1-ethyl-2-pyrrolidinyl)methyl and 1-benzyl-4-piperidinyl, was compared. The 3-bromo-5,6-dimethoxysalicylamide substitution pattern was found to be the most general since it gave very potent compounds in all series. The substituted (R)-N-[(1-(4-fluoro-benzyl)-2-pyrrolidinyl)methyl]benzamides (26)
已经制备了许多取代的N-[(1-苄基-2-吡咯烷基)甲基]苯甲酰胺和-水杨酰胺,并作为多巴胺D-2受体拮抗剂在体外和体内进行了研究。与相应的N-乙基或N-烯丙基衍生物相反,发现亲和力仅限于R对映异构体。化合物(15)之一的X射线结构证实了R立体化学。发现该化合物(15)具有固态构象,其中4-氟苄基被折叠在水杨酰胺部分上。具有2,3-二甲氧基取代模式的苯甲酰胺(24和26)或具有5,6-二甲氧基基团的水杨酰胺(21和22)特别有效,因为它们抑制[3H]哌隆与大鼠纹状体多巴胺D-2的结合。受体在体外的IC50值约为1 nM。新化合物 阻断阿扑吗啡诱发的刻板印象的能力与对[3H] spiperone结合位点的亲和力有关。与阻止阿扑吗啡诱导的反应相比,更高的剂量水平对于引起僵直症是必需的。芳族取代基对具有三种侧链的取代苯甲酰胺的效能的影响,即(R)-(1-苄基-2-吡咯烷基)甲基,(S)-(1-乙