3-amino-1h-pyrazolo(3,4-b)pyridines

Abstract

Abstract IN WHICH Z1 stands for an optionally substituted alkyl or aralkyl group, K for the radical of a coupling component and A for an anion, and X, Y and Z are defined as further above. These dyestuffs, which are especially suitable for dyeing polyacrylonitrile, have a high tinctorial strength and generally afford good fastness properties. WHEREIN X is amino, alkylamino with 1 - 6 carbon atoms, lower alkoxy- lower alkylamino, hydroxy- lower alkylamino, amino- lower alkylamino, di-lower alkylamino - lower alkylamino, cyclohexylamino, benzylamino, furfurylamino, pyridylamino, pyridylmethylamino, phenylamino, lower alkoxy-phenylamino, dilower alkylamino, di-hydroxy lower alkylamino, lower alkyl hydroxy lower alkylamino, lower alkyl phenylamino, hydroxy lower alkyl cyclohexylamino, hydroxy lower alkyl lower alkoxyamino, lower alkyl lower alkoxyamino, morpholyl, piperidyl, N- lower alkyl piperazinyl, pyrrolidinyl, morpholyl- lower alkylamino; hydrazino, lower alkylhydrazino, di-lower alkylhydrazino, trilower alkylhydrazino, phenylhydrazino, N-piperidylamino, Nmorpholyalmino, N-pyrrolidinylamino,- lower alkoxy, lower alkoxy - lower alkoxy, cyclohexyloxy, phenoxy, benzyloxy, hydroxy lower alkoxy; lower alkylthio, phenylthio; Y is hydrogen, lower alkyl, hydroxy -lower alkyl, di-lower alkylamino -lower alkyl, cyclohexyl, benzyl, phenyl, chlorophenyl, furyl, pyridyl-methyl and Z is hydrogen or lower alkyl and ''''lower'''' means groups with one to four carbon atoms. These compounds are valuable intermediate products for the preparation of dyestuffs, especially of azo dyestuffs of the formula A 3-amino-1H-pyrazolo(3,4-b)pyridine of the formula

Inventors

• 👤 Erwin Fleckenstein
• 👤 Reinhard Mohr

Bibliographic Details