A NEW SYNTHETIC APPROACH TO PYRIDINIUM N-PHENOXIDE BETAINE DYES

Authors
SANDER W HINTZE F
Citation
W. Sander et F. Hintze, A NEW SYNTHETIC APPROACH TO PYRIDINIUM N-PHENOXIDE BETAINE DYES, Chemische Berichte, 127(1), 1994, pp. 267-269
Citations number
19
Categorie Soggetti
Chemistry
Journal title
Chemische Berichte → ACNP
ISSN journal
00092940
Volume
127
Issue
1
Year of publication
1994
Pages
267 - 269
Database
ISI
SICI code
0009-2940(1994)127:1<267:ANSATP>2.0.ZU;2-W
Abstract
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-butylpy ridinio)phenolate (Id) - which is not accessible by the classical rout e via pyrylium salts - in reasonable yield. Carbene 3d is generated by thermal decomposition of the corresponding quinone diazide 2d in cycl ohexane. Betaine 1d shows the expected large solvatochromism.