146765-81-3Relevant academic research and scientific papers
Pyryliumolates. III. Synthesis of Annulated Benzotropolones
Plueg, Carsten,Friedrichsen, Willy,Debaerdemaeker, Tony
, p. 205 - 216 (2007/10/03)
Dirhodiumtetraacetate catalyzed nitrogen extrusion from diazocarbonyl compounds (2a-f, 19c, 23d-f, 25b) yields benzopyryliumolates (3), which were trapped intramolecularly in situ to give tetracyclic adducts (4a, 5a-d, 20, 24a-c, 26). Starting with 5a and 5d annulated benzotropolones (12a, d) are accessible.
Pyryliumolates. 1. A simple access to anellated benzotropolones
Plug,Friedrichsen
, p. 7509 - 7510 (2007/10/02)
The synthesis of benzotropolones 4a,b utilizing an intramolecular 1,3-dipolar cycloaddition reaction with benzopyryliumolates (2a,b; generated in situ) is reported.
