A CHIRAL ARYLAZOMETHYLENEINDOLINE DYE

Authors
BUSS V EGGERS L
Citation
V. Buss et L. Eggers, A CHIRAL ARYLAZOMETHYLENEINDOLINE DYE, Tetrahedron : asymmetry, 8(10), 1997, pp. 1531-1533
Citations number
8
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear","Chemistry Physical
Journal title
Tetrahedron : asymmetry → ACNP
ISSN journal
09574166
Volume
8
Issue
10
Year of publication
1997
Pages
1531 - 1533
Database
ISI
SICI code
0957-4166(1997)8:10<1531:ACAD>2.0.ZU;2-K
Abstract
The chiral arylazomethyleneindoline dye 3 has been synthesized by coup ling the chiral Fischer base 1 with p-nitrophenyldiazonium tetrafluoro borate 2, The NMR spectrum of 3 reveals the existence of two conformat ions with a ratio of 6:1, Whereas at room temperature no photochromism is observed, E/Z isomerisation of the azo group of 3 is detected at - 155 degrees C. The Cotton effect is small and is not affected by irrad iation with UV or visible light. (C) 1997 Elsevier Science Ltd.