Studies on antiulcer drugs. III. Synthesis and antiulcer activities of imidazo[1,2-a]pyridinylethylbenzoxazoles and related compounds. A novel class of histamine H2-receptor antagonists.
A series of imidazo[1,2-a]pyridinylalkylbenzoxazole derivatives was synthesized and tested for histamine H2-receptor antagonist, gastric antisecretory and antiulcer activities. Some of 2-amino-6-[2-(imidazo[1,2-a]pyridin-2-yl)ethyl]benzoxazole derivatives were found to have good pharmacological activities. Among them, 2-amino-6-[2-(7-methoxy-3-methylimidazo[1,2-a]pyridin-2-yl)ethyl] benzoxazole (II-11) and 2-acetamido-6-[2-(7-methylimidazo[1,2-a]pyridin-2-yl)ethyl] benzoxazole (II-38) showed potent antisecretory and cytoprotective activity. The structure-activity relationships of these compounds are discussed.
New Drug Research Laboratories, Fujisawa Pharmaceutical Co., Ltd., Osaka, Japan.
Y
Y
Katsura
Y
Y
Inoue
S
S
Nishino
M
M
Tomoi
H
H
Itoh
H
H
Takasugi
D000818:Animals; D000897:Anti-Ulcer Agents / Q000494:pharmacology*; D001583:Benzoxazoles / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D006635:Histamine H2 Antagonists / Q000494:pharmacology*; D066298:In Vitro Techniques; D013329:Structure-Activity Relationship
D000897:Anti-Ulcer Agents; D001583:Benzoxazoles; D006635:Histamine H2 Antagonists