AMINO DERIVATIVES OF PYRAZOLO 1,5-A S. TRIAZINE, PROCESSES FOR THEIR PREPARATION AND THEIR THERAPEUTIC APPLICATIONS

摘要

- 21 -NEW AMINO DERIVATIVES OF PYRAZOLO [1.5-A]S.TRIAZINE,PROCESSES FOR THEIR PREPARATION ANDTHEIR THERAPEUTIC APPLICATIONS.ABSTRACT OF THE DISCLOSURE.This invention relates to compounds havingthe general formula : (I)in which :R1 represents a hydrogen atom or a (C1-4)alkyl radical,R2 represents a hydrogen atom, a (C1-4)alkyl radical,a (C2-4)alkenyl radical, a (C1-4)alkoxy-(C1-4)alkyl radical or a tetrahydrofuryl- ortetrahydropyranyl-(C1-4)alkyl radical,R3 represents a hydrogen atom or a (C1-4)alkylradical, andR4 represents a hydrogen atom or a (C1-4)alkyl radical,and their pharmaceutically acceptable acid additionsalts.Said compounds have valuable bronchodilatorproperties.