Novel Benzamides as Selective and Potent Gastrokinetic Agents. III. Synthesis and Structure-Activity Relationships of 4-Amino-5-chloro-2-methoxy- and 2-Ethoxy-N-((4-substituted 2-morpholinyl)methyl)- benzamides.
作者:Shiro KATO、Toshiya MORIE、Hiroshi HARADA、Naoyuki YOSHIDA、Jun-ichi MATSUMOTO
DOI:10.1248/cpb.40.652
日期:——
A series of 4-amino-5-chloro-2-methoxy- and 2-ethoxy-N-[(4-substituted 2-morpholinyl)methyl]benzamides (11-64) were prepared and evaluated for gastrokinetic activity by determining their effects on the gastric emptying of phenol red semisolid meal in rats. The N-4 substituent includes alkyl, phenoxyalkyl, (4-fluorobenzoyl)alkyl, and heteroarylmethyl groups. The benzamide derivatives, having an isopropyl
制备了一系列的4-氨基-5-氯-2-甲氧基-和2-乙氧基-N-[(4-取代的2-吗啉基)甲基]苯甲酰胺(11-64),并通过确定它们的作用来评估其胃肠动力。在大鼠胃排空酚红半固态粉中的作用。N-4取代基包括烷基,苯氧基烷基,(4-氟苯甲酰基)烷基和杂芳基甲基。在N-4处具有异丙基,异戊基,新戊基,3-(4-氯苯氧基)-丙基或吡啶基甲基的苯甲酰胺衍生物显示出有效的体内胃排空活性。尤其是4-氨基-5-氯-2-乙氧基-N-[[4-(3-吡啶基甲基)-2-吗啉基]甲基]苯甲酰胺(57b)与4-氟苄基类似物1b(AS-4370 (柠檬酸盐)对大鼠和小鼠的酚红半固体粉和大鼠树脂颗粒固体粉的胃肠动力学。此外,化合物57b在体外([3H] spiperone结合)和体内(阿扑吗啡诱导的犬呕吐)测试中均没有多巴胺D2受体拮抗活性。还讨论了在N-4处具有各种取代基的化合物的结构活性关系。