Tetrahedron p. 4905 - 4912 (1994)
Update date:2022-08-05
Topics:
Ghosh, Chandra Kanta
Bhattacharya, Kaberi
Ghosh, Chandreyi
The chromone derivatives 1, 2, and 4 give with N-phenylmaleimide the cycloadducts 5, 12, and 13 which are converted by palladised charcoal into 2-azaxanthone 6, xanthones 14 and 15, respectively.Treatment of the azaxanthone 5 with acidic ethanol produces a mixture of salicyloyl-pyridines 7-9.
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