Novel Benzamides as Selective and Potent Gastrokinetic Agents. IV. Synthesis and Structure-Activity Relationships of 2-Substituted 4-Amino-N-((4-benzyl-2-morpholinyl)methyl)-5-chlorobenzamides.
作者:Shiro KATO、Toshiya MORIE、Naoyuki YOSHIDA、Jun-ichi MATSUMOTO
DOI:10.1248/cpb.40.1470
日期:——
A new series of 2-substituted 4-amino-N-[(4-benzyl-2-morpholinyl)methyl]-5-chlorobenzamides (4-39) including a few 4-fluorobenzyl analogues were prepared and evaluated for their gastrokinetic activity by determining their effects on the gastric emptying activity of phenol red semisolid meal in rats. The C-2 substituent comprises alkoxy and variously substituted alkoxy groups. Among the derivatives, 4-amino-N-[(4-benzyl-2-morpholinyl)methyl]-2-(n-butoxy)-5-chlorobenzamide (5), its 4-fluorobenzyl (6), and 3-methyl-2-butenyloxy analogues (22) were superior to cisapride and essentially equipotent to the 2-ethoxy analogue (1b, AS-4370 as its citrate) in gastrokinetic activity. These compounds, like AS-4370, had no dopamine D2 receptor antagonistic activity.
制备了一系列新的 2-取代的 4-氨基-N-[(4-苄基-2-吗啉基)甲基]-5-氯苯甲酰胺(4-39),包括一些 4-氟苄基类似物,并通过测定它们对大鼠酚红半固体膳食胃排空活性的影响,评估了它们的胃动力活性。C-2 取代基包括烷氧基和各种取代的烷氧基。在这些衍生物中,4-氨基-N-[(4-苄基-2-吗啉基)甲基]-2-(正丁氧基)-5-氯苯甲酰胺(5)、其 4-氟苄基(6)和 3-甲基-2-丁烯氧基类似物(22)的胃动力活性优于西沙必利,与 2-乙氧基类似物(1b,AS-4370 作为其柠檬酸盐)基本相当。这些化合物与 AS-4370 一样,没有多巴胺 D2 受体拮抗活性。