An optically active pyrrolopyridazine compound of the formula (I) or a pharmaceutically acceptable salt thereof:
1
wherein R
1
is alkyl; R
2
and R
3
are each independently alkyl; R
4
is optionally substituted aryl; and A is imino, oxygen or sulfur. The pyrrolopyridazine compound or pharmaceutically acceptable salts thereof of the present invention exhibit excellent gastric acid secretory inhibition activity and gastric mucous membrane protection activity, as well as excellent antibacterial activity against
Helicobacter pylori.
They are useful medicines and are particularly useful for treating or preventing ulcerative diseases.
式(I)的旋光异构的
吡咯吡啶嗪化合物或其药学上可接受的盐:
其中R1是烷基;R2和R3各自独立地是烷基;R4是可选取代的芳基;A是
亚胺基、氧原子或
硫原子。本发明的
吡咯吡啶嗪化合物或其药学上可接受的盐,表现出优异的胃酸分泌抑制活性和胃粘膜保护活性,以及对幽门螺杆菌的优异抗菌活性。它们是有用的药物,特别是用于治疗或预防溃疡性疾病。