METHOD OF OBTAINING PYRADIZINE SUBSTITUTED DERIVATIVES

摘要

The present invention relates to amino derivatives of pyridazine of general formula: (I) in which one of the substituents R1, R2 or R3 represents a phenyl or hydroxyphenyl group, while the other two represent hydrogen or an alkyl group with C1-C4; A represents a linear or branched alkylene group having 2 to 5 carbon atoms; X represents hydrogen or an alkyl group with C1-C4, as well as the salts of said derivatives with the pharmaceutically acceptable acids, and also relates to a process for preparing the products of formula (I) and to drugs containing a product of formula (I).