PYRYLIUMOLATES .3. SYNTHESIS OF ANNULATED BENZOTROPOLONES

Authors
FRIEDRICHSEN W
Citation
W. Friedrichsen, PYRYLIUMOLATES .3. SYNTHESIS OF ANNULATED BENZOTROPOLONES, Journal fur praktische Chemie, Chemiker-Zeitung, 339(3), 1997, pp. 205-216
Citations number
69
Categorie Soggetti
Chemistry,"Chemistry Applied
Journal title
Journal fur praktische Chemie, Chemiker-Zeitung → ACNP
ISSN journal
09411216
Volume
339
Issue
3
Year of publication
1997
Pages
205 - 216
Database
ISI
SICI code
0941-1216(1997)339:3<205:P.SOAB>2.0.ZU;2-#
Abstract
Dirhodiumtetraacetate catalyzed nitrogen extrusion from diazocarbonyl compounds (2a-f, 19c, 23d-f, 25b) yields benzopyryliumolates (3), whic h were trapped intramolecularly in situ to give tetracyclic adducts (4 a, 5a-d, 20, 24a-c, 26). Starting with 5a and 5d annulated benzotropol ones (12a, d) are accessible.