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Heterocyclic alternatives for benzidine‐based mono‐ and disarylazo pigments: Synthesis and characterization of a novel class of pyrazolo (1,5‐ a )pyrimidine azo pigments
Author(s) -
Hanna Mokhtar A.,
Girges Margret M.
Publication year - 1995
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280620413
Subject(s) - benzidine , pyrimidine , pigment , chemistry , characterization (materials science) , combinatorial chemistry , organic chemistry , stereochemistry , nanotechnology , materials science
In a sequence of reactions, three different series of novel mono‐ and disarylazo pyrazolo(1,5‐ a )pyrimidine pigments were prepared to determine whether these products might successfully act as possible alternatives for benzidine‐based dyestuffs, which are known to be associated with toxicological hazard and carcinogenic effects. The structure of the named compounds was inferred from elemental and spectral analysis and, in some cases, by alternative synthetic routes.