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Studies in chromone derivatives: cycloaddition reactions of 4-oxo 4h-1-benzopyran-3-carboxaldehyde imines with benzonitrile oxide and nitrilimine of 4-oxo-4h-1-benzopyran-3-carboxaldehyde with alkenes

✍ Scribed by Arpan Kumar Baruah; Dipak Prajapati; Jagir Singh Sandhu

Publisher: Elsevier Science
Year: 1988
Tongue: French
Weight: 474 KB
Volume: 44
Category: Article
ISSN: 0040-4020
DOI: 10.1016/s0040-4020(01)85904-4

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✦ Synopsis

The chromone fmfn s 1 and benzonitrile oxide reacted regioapaciffcally to yield 6 1 -172,4 oxadiarolinyl chromonea 2_in good yields. Also the preparation of a novel dipole & derived from f-formylchromons and its cycloaddition reactions with a variety of alkenes which gave pyrazolinyl chromones zia described. I242 A. K. B.UWAH et al. sit. salactivity follouad by th. dipole 14 and oyclaaddition ocaurring only l aroaa the azomethina Punction leaving chromona double bond intact.

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