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Title: Synthesis of pyrano[3', 2':5, 6]pyrido[1, 2-a]benzimidazoles and their application on polyester fibres as fluorescent disperse dyes
Authors: Rangnekar, D W
Rajadhyaksha, D D
Keywords: Disperse dyes;Heterocyclic compounds;Polyester fibre;Pyrano[3', 2':5, 6]pyrido[1, 2-a]benzimidazoles
Issue Date: Jun-1991
Publisher: NISCAIR-CSIR, India
Abstract: 3-Methyl-1-oxo-1H, 5H-pyrido[1, 2-a]benzimidazole-4-carbonitrile was formylated to its 2-formyl derivative and condensed with different active methylene carboxylic acids and nitriles to get substituted pyrano[3', 2':5, 6]pyrido[1, 2-a]benzimidazoles. These brilliant dyes when applied on polyester fibres gave yellow shades with greenish fluorescence having moderate light fastness and good sublimation fastness.
Page(s): 170-172
ISSN: 0975-1025 (Online); 0971-0426 (Print)
Appears in Collections:IJFTR Vol.16(2) [June 1991]

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