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Title: Synthesis of pendant 3-[1,2,3-triazol-2-yl]thieno[2,3-b]pyridines and their application on polyester fibres as fluorescent brighteners
Authors: Rangnekar, D W
Kamat, P Y
Keywords: Fluorescent brightener;Polyester fibre;3-[1,2,3-triazol-2-yl]thieno[2,3-b]pyridines
Issue Date: Jun-1992
Publisher: NISCAIR-CSIR, India
Abstract: 3-Amino-2-carbethoxy-4, 6-dimethylthieno[2,3-b]pyridine (III) was prepared by the condensation of 2-chloro-3-cyano-4, 6-dimethylpyridine (II) with ethyl thioglycollate and diazotized and coupled with selected arylamines and hetarylamines to give 3-(2-aminoaryl/hetaryl)azo-2-carbethoxy-4,6-dimethylthieno[2,3-b]pyridines (V). The resulting orthoaminoazo compounds were oxidized with cupric acetate in refluxing DMF in a current of air to give 3-[1,2,3-triazol-2-yl]thieno[2,3-b]pyridine derivatives (VI). The fluorescent properties of pyridine derivatives VI were studied. These compounds when applied as fluorescent brighteners gave moderate whitening effects.
Page(s): 95-97
ISSN: 0975-1025 (Online); 0971-0426 (Print)
Appears in Collections:IJFTR Vol.17(2) [June 1992]

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