RING TRANSFORMATIONS OF HETEROCYCLIC-COMPOUNDS .15. N-(2-HYDROXYPHENYL) SUBSTITUTED 2-ALKYLAMINO-4,6-DIARYLBENZOPHENONES BY RING TRANSFORMATION OF 2,4,6-TRIARYLPYRYLIUM SALTS WITH ANHYDROBASES OF BENZOXAZOLIUMSALTS

Citation
T. Zimmermann et al., RING TRANSFORMATIONS OF HETEROCYCLIC-COMPOUNDS .15. N-(2-HYDROXYPHENYL) SUBSTITUTED 2-ALKYLAMINO-4,6-DIARYLBENZOPHENONES BY RING TRANSFORMATION OF 2,4,6-TRIARYLPYRYLIUM SALTS WITH ANHYDROBASES OF BENZOXAZOLIUMSALTS, Journal of heterocyclic chemistry, 33(6), 1996, pp. 1679-1683
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemistry Inorganic & Nuclear
ISSN journal
0022-152X
Volume
33
Issue
6
Year of publication
1996
Pages
1679 - 1683
Database
ISI
SICI code
0022-152X(1996)33:6<1679:RTOH.N>2.0.ZU;2-B
Abstract
The synthesis of hitherto unknown N-(2-hydroxyphenyl) substituted 2-al kylamino-4,6-diarylbenzophenones 3 from 2,4,6-triarylpyrylium salts 1 and 3-alkyl-2-methylbenzoxazolium salts 2 in the presence of triethyla mine in ethanol by a 2,5-[C-4+C-2] pyrylium ring transformation is rep orted. Structure elucidation is performed by an X-ray crystal structur e determination of the benzophenone 3a. Spectroscopic data of the tran sformation products and their mode of formation via anhydrobases of th e salts 2 are discussed.