The chromone imines (2) and nitrite imines (4) reacted smoothly to yield the novel 1,2,4-triazolinyl- and triazepinyl-chromones, (6) and (5) respectively. The facile preparation of nitrones of chromones and their selected reactions with a variety of alkenes to obtain isoxazolidinylchromones (12) is also described.
A. K. Baruah, D. Prajapati and J. S. Sandhu, J. Chem. Soc., Perkin Trans. 1, 1987, 1995 DOI: 10.1039/P19870001995
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