Chemical and Pharmaceutical Bulletin p. 1137 - 1147 (1995)
Update date:2022-08-04
Topics:
Morie
Kato
Harada
Yoshida
Fujiwara
Matsumoto
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.
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