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A New Synthetic Approach to Pyridinium N-Phenoxide Betaine Dyes (1994)

Sander, Wolfram ; Hintze, Frank

Weinheim : Wiley-Blackwell

Berichte der deutschen chemischen Gesellschaft 127 (1994), S. 267-269

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ISSN: 0009-2940

Keywords: Betaine dye ; Solvatochromism ; Ylide ; Carbene reaction ; Chemistry ; Inorganic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The reaction of 3,5-di-tert-butyl-4-oxo-2,5-cyclohexadienylidene (3d) with pyridine affords 2,6-di-tert-butyl-4-(2,4,6-tri-tert-butylpyridinio)phenolate (1d) - which is not accessible by the classical route via pyrylium salts - in reasonable yield. Carbene 3d is generated by thermal decomposition of the corresponding quinone diazide 2d in cyclohexane. Betaine 1d shows the expected large solvatochromism.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/cber.19941270137

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