Synthesis of 2,2′-Diaminobischromones Using a Modified Procedure for the Rearrangement of 5-(2-Hydroxyphenyl)isoxazole to 2-Aminochromone

Tarun Ghosh; Satyajit Saha; Chandrakanta Bandyopadhyay

doi:10.1055/s-2005-869965

PAPER

Synthesis of 2,2′-Diaminobischromones Using a Modified Procedure for the Rearrangement of 5-(2-Hydroxyphenyl)isoxazole to 2-Aminochromone

Tarun Ghosh, Satyajit Saha, Chandrakanta Bandyopadhyay*
Department of Chemistry, R. K. Mission Vivekananda Centenary College, Rahara, Kolkata 700 118, West Bengal, India
e-Mail: kantachandra@rediffmail.com;

Abstract

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Abstract

A modified procedure for the rearrangement of 5-(2-hydroxyphenyl)isoxazoles 6a-e to 2-aminochromones 8a-e was developed and this procedure was utilised in the synthesis of hitherto unreported bischromones 3a-c. The isoxazoles 6a-e were prepared regioselectively from aminovinylketones 5.

Key words

heterocycles - chromones - regioselectivity - rearrangements - isoxazoles

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References

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