PREPARATION PROCESS FOR DIAMINO PYRIDINE

摘要

Diaminopyridine deirvs. of formula (I) [R1=H or C1-4 alkyl; X and Z=The one is CH, the other is N.!, and their salts are prepared for use as inotropic agents. A compd. of formula (II), or its salt, is reacted with hydrogen in the presence of a catalytic amount of a palladium catalyst in a solvent at 50 -150 ≦̸C. The title compds are obtained in high yields and purity.