PYRROLO[2,3-D]PYRIDAZINE DERIVATIVES, PROCESS FOR THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM

摘要

Pyrrolopyridazine derivatives having the general formula. ÄIn the above formula, R<1> represents a C2-C6 alkenyl group, a halogeno-C2-C6-alkenyl group, a C6-C10 aryl-C2-C6-alkenyl group, a C2-C6 alkynyl group, a C3-C7 cycloalkyl group, a C3-C7 cycloalkyl-C1-C6-alkyl group, a C5-C7 cycloalkenyl-C1-C6-alkyl group or a halogeno-C1-C6-alkyl group; R<2> and R<3> are the same or different and each represents a hydrogen atom, a C1-C6 alkyl group or a C6-C10 aryl group; R<4> represents a hydrogen atom or a C1-C6 alkyl group; R<5> represents a C6-C10 aryl group or a 5-10 membered heteroaryl group comtaining heteroatom(s) selected from nitrogen, oxygen and sulfur; A represents a C1-C3 alkylene group; X represents an imino group, an oxygen atom, a sulfur atom or a methylene group; m represents 0 or 1; and n represents 0 or 1Ü or pharmaceutically acceptable salts thereof. ÄEffectÜ The pyrrolopyridazine derivatives of the present invention have an excellent gastric secretion inhibiting activity, gastric mucosa protective activity and antibacterial activity against Helicobacter pylori, and are useful as a preventive or therapeutic agent for ulcerous diseases.