Novel environmentally benign procedures for the synthesis of styryl dyes

Authors
Vasilev, Aleksey; Deligeorgiev, Todor; Gadjev, Nikolai; Kaloyanova, Stefka; Vaquero López, Juan J.; [et al.]
Identifiers
Permanent link (URI): http://hdl.handle.net/10017/4205
DOI: 10.1016/j.dyepig.2007.08.004
ISSN: 0143-7208
Publisher
Elsevier
Date
2008
Affiliation
Universidad de Alcalá. Departamento de Química Orgánica
Bibliographic citation
Dyes and Pigments, 2008, v.77, n.3, p.550-555
Keywords
Styryl dyes
Synthesis
Solvent-free
Microwave
Green chemistry
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/publishedVersion
Publisher's version
http://dx.doi.org/10.1016/j.dyepig.2007.08.004
Rights
© Elsevier, 2007
Access rights
info:eu-repo/semantics/openAccess
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Abstract
A series of styrylpyridinium, styrylquinolinium and styrylbenzothiazolium dyes have been synthesized by novel environmentally benign procedures. The condensation of 4-methylpyridinium methosulphate, 2- or 4-methylquinolinium methosulphate or 2-methylbenzothiazolium methosulphate with aromatic aldehydes was performed under solvent-free conditions or microwave irradiation in the presence of different basic or acidic reagents. The chemical structures of the derived styrylcyanine dyes were confirmed by 1H NMR and UV–vis spectroscopies and elemental analysis.
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