OXA-[3+3] ANNULATION OF 1<i>H</i>-BENZO[<i>f</i>]CHROMENE-2-CARBALDEHYDES AND 2-NAPHTHOLS: SYNTHESIS OF 7a<i>H</i>,15<i>H</i>-BENZO[<i>f</i>]BENZO[5,6]CHROMENO[2,3-<i>b</i>]CHROMENES
DOI:
https://doi.org/10.1007/6287Keywords:
1H-benzo[f]chromene-2-carbaldehydes, chromeno[2, 3-b]chromenes, 2-naphthols, electrocyclization, formal [3 3] cycloaddition.Abstract
A method for the preparation of polycondensed chromeno[2,3-b]chromenes was developed based on the formal [3+3] cycloaddition reaction between 1H-benzo[f]chromene-2-carbaldehydes and 2-naphthols. In the case of resorcinol, the bisannulation product formed with the participation of both hydroxy groups was isolated.
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Published
2021-06-19
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Short Communications