title: Experimental antiulcer drugs. 1. Indole-1-alkanamides and pyrrole-1-alkanamides.
abstract: The synthesis and gastric antisecretory activity of a series of indole-1-alkanamides and pyrrole-1-alkanamides are presented. A marked elevation of the pH of the gastric secretions of the rat was observed after oral administration of 100 mg/kg of 2,3-dimethylindole-1-acetamide (2), -1-propionamide (8), and -1-butyramide (13). Replacement of either methyl group by a hydrogen atom or an ethyl radical resulted in greatly diminished activity. In the acetamide and propionamide series the 3-hydroxymethyl-2-methyl (14 and 15) derivatives exhibited activity but only when administered by the subcutaneous route. 2,3-Dimethylindole (18) was active and 2,3,4,5-tetramethylpyrrole-1-acetamide was moderately active. A number of the activ compounds were tested in the mouse mydriasis test for anticholinergic activity and found to be inactive. They were also found to be inactive in blocking histamine-induced acid secretion in the dog.
mesh_terms: D000818:Animals; D000897:Anti-Ulcer Agents / Q000138:chemical synthesis*; D004285:Dogs; D005750:Gastric Juice / Q000378:metabolism; D006168:Guinea Pigs; D006339:Heart Rate / Q000187:drug effects; D066298:In Vitro Techniques; D007211:Indoles / Q000138:chemical synthesis* / Q000494:pharmacology; D008297:Male; D051379:Mice; D011680:Pupil / Q000187:drug effects; D011758:Pyrroles / Q000138:chemical synthesis* / Q000494:pharmacology; D051381:Rats; D013329:Structure-Activity Relationship; D014839:Vomiting / Q000139:chemically induced
chemical_list: D000897:Anti-Ulcer Agents; D007211:Indoles; D011758:Pyrroles