Studies on antiulcer drugs. VI. 4-Furyl-2-guanidinothiazoles and related compounds as potent histamine H2-receptor antagonists.
A series of 4-furyl-2-guanidinothiazole derivatives and related compounds were synthesized and evaluated for histamine H2-receptor antagonist and gastric acid antisecretory activities. Among them, compounds I-17, I-48 and I-49 showed high activities in these tests. In addition, compound I-17 possessed potent inhibitory activities on each of the gastric ulcers induced by stress, ethanol and HCl-aspirin. On the other hand, compound I-48 demonstrated antimicrobial activity against Helicobacter Pylori and the potency was far stronger than that of clinically used H2-antagonists. Some structure-activity relationships are discussed.
Katsura
Y
Y
New Drug Research Laboratories, Fujisawa Pharmaceutical Co., Ltd., Osaka, Japan.
Inoue
Y
Y
Tomishi
T
T
Itoh
H
H
Ishikawa
H
H
Takasugi
H
H
D000818:Animals; D000900:Anti-Bacterial Agents / Q000138:chemical synthesis / Q000494:pharmacology; D000897:Anti-Ulcer Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects; D004285:Dogs; D006146:Guanidines / Q000138:chemical synthesis* / Q000494:pharmacology; D006168:Guinea Pigs; D006635:Histamine H2 Antagonists / Q000138:chemical synthesis* / Q000494:pharmacology; D008297:Male; D051381:Rats; D013844:Thiazoles / Q000138:chemical synthesis* / Q000494:pharmacology
D000900:Anti-Bacterial Agents; D000897:Anti-Ulcer Agents; D006146:Guanidines; D006635:Histamine H2 Antagonists; D013844:Thiazoles