Synthesis and Structure-Activity Relationships of 4-Amino-5-chloro-2-ethoxybenzamides with Six- and Seven-Membered Heteroalicycles as Potential Gastroprokinetic Agents.
作者:toshiya MORIE、Shiro KATO、Hiroshi HARADA、Naoyuki YOSHIDA、Iwao FUJIWARA、Jun-ichi MATSUMOTO
DOI:10.1248/cpb.43.1137
日期:——
A new series of 4-amino-5-chloro-2-ethoxybenzamides 3b-f and 5-8 bearing six and seven-membered heteroalicycles was prepared and evaluated for gastroprokinetic activity. Compounds 3b-e, derived by replacement of the morpholine oxygen of 4-amino-N-[(4-benzyl-2-morpholinyl)methyl]-5-chloro-2-ethoxybenzamide (3a) with other atoms (sulfur, nitrogen and carbon), generally exhibited a potent gastric emptying activity. N-(4-Benzyl-3-morpholinyl)methylbenzamide (5a) and its analogues 5b-e had weaker activity. However, N-(4-benzyl-3-morpholinyl)ethylbenzamide 8 was as potent as 3a. Benzamides 6a-e, having seven-membered heteroalicycles, showed fairly potent activity.Molecular superimpositions of 5a, 6a and 8 upon 3a using computer graphics suggested that the direction of the N-benzyl group greatly influences the gastric emptying activity, whereas the location of the alicyclic nitrogen is less critical.
一系列新型4-氨基-5-氯-2-乙氧基苯酰胺3b-f和含有六元和七元杂环的化合物5-8被制备并评估了其胃促动活性。通过将4-氨基-N-[(4-苄基-2-吗啉基)甲基]-5-氯-2-乙氧基苯酰胺(3a)中的吗啉氧替换为其他原子(硫、氮和碳)得到的化合物3b-e,一般显示出强效的胃排空活性。N-(4-苄基-3-吗啉基)甲基苯酰胺(5a)及其类似物5b-e活性较弱。然而,N-(4-苄基-3-吗啉基)ethyl苯酰胺8的活性与3a相当。含有七元杂环的苯酰胺6a-e显示出相当强的活性。通过计算机图形学进行的5a、6a和8相对于3a的分子重叠分析表明,N-苄基取代基的方向对胃排空活性影响重大,而杂环氮的位置影响较小。