A new method for the preparation of solvatochromic 5-(5-X-6-hydroxynaphthyl-2)-7H-indolo[1,2-a]quinolinium merocyanines

• Authors: Marta Sawicka , Jacek Soroka , Monika Gąsiorowska
• Languages of publication: EN

Abstracts

EN

A new method for the preparation of 7H-indolo[1,2-a]quinolinium solvatochromic dye precursors has been investigated. 5-(6-Hydroxynaphthyl-2)-7,7-dimethyl-7H-indolo[1,2-a]quinolinium perchlorate, 5-(5-bromo-6-hydroxynaphthyl-2)-7,7-dimethyl-7H-indolo[1,2-a]quinolinium perchlorate and 5-(5-nitro-6-hydroxynaphthyl-2)-7,7-dimethyl-7H-indolo[1,2-a]quinolinium perchlorate were obtained via demethylation of the corresponding 5-(5-X-6-methoxynaphthyl-2)-7,7-dimethyl-7H-indolo[1,2-a]quinolinium salts. The application of pyridinium hydrochloride in the demethylation of the methoxy perchlorates allowed to obtain the products with the almost quantitative yield in a very short time, especially when the reaction was carried out using microwave irradiation.

Keywords

EN

7H-indolo[1,2-a]quinolinium perchlorate; solvatochromic dye; pyridinium hydrochloride; microwave synthesis; demethylation

• Publisher: De Gruyter Open
• Journal: Polish Journal of Chemical Technology
• Year: 2010
• Volume: 12
• Issue: 1
• Pages: 17-22

Dates

published

1 - 1 - 2010

online

8 - 4 - 2010

Contributors

author

Marta Sawicka

• Institute of Chemistry and Environmental Protection, Section of Instrumental Analysis, West Pomeranian University of Technology, Szczecin, ul. Piastów 42, 71-065 Szczecin, Poland

author

Jacek Soroka

• Institute of Chemistry and Environmental Protection, Section of Instrumental Analysis, West Pomeranian University of Technology, Szczecin, ul. Piastów 42, 71-065 Szczecin, Poland

author

Monika Gąsiorowska

• Institute of Chemistry and Environmental Protection, Section of Instrumental Analysis, West Pomeranian University of Technology, Szczecin, ul. Piastów 42, 71-065 Szczecin, Poland

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Identifiers

DOI

10.2478/v10026-010-0004-3