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Synthesis of 2 and 6‐triazolylthiazolo[4,5‐b]quinoxaline derivatives and their application as fluorescent disperse dyes
Author(s) -
Phadke Ravindra Chintaman,
Rangnekar Dinesh Wamanrao
Publication year - 1986
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.280360505
Subject(s) - quinoxaline , sodium nitrite , chemistry , hydrochloric acid , fluorescence , nitric acid , organic chemistry , nitrite , nitro , derivative (finance) , medicinal chemistry , combinatorial chemistry , nitrate , physics , alkyl , quantum mechanics , financial economics , economics
Synthesis of 2‐triazolylthiazolo[4,5‐b]quinoxaline derivatives was achieved by diazotisation of 2‐aminothiazolo[4,5‐b]quinoxaline and its 6‐nitro derivative using orthophosphoric acid and sodium nitrite with a trace of nitric acid, coupling with suitable aromatic amines and subsequent cyclisation of the resulting ortho amino azo compounds. Diazotisation of 2,6‐diaminothiazolo[4,5‐b]quinoxaline with concentrated hydrochloric acid and sodium nitrite and subsequent coupling and cyclisation resulted in the 6‐triazolylthiazolo[4,5‐b]quinoxaline derivatives. These compounds were applied on polyester as fluorescent disperse dyes.