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4-Alkoxynaphthaldehydes and their application in synthesis of styryl pyrylium dyes with broad absorption band in visible spectrum
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1  Technologist Co., Ltd., Mendeleev sq. 2 bldg. 157, Pereslavl-Zalesskiy, Yaroslavl reg., 152020, Russian Federation

Abstract: 2,4-Di(4-propoxyphenyl)-6-(4-propoxynaphthyl)pyrylium tetrafluoborate - styryl pyrylium dye with broad absorption bands at 400-500nm and 500-630nm was synthesized. Method for obtaining intermediate 4-propoxynaphthaldehyde was improved.
Keywords: pyrylium salt, styryl pyrylium dye, 4-alkoxynaphthaldehydes