✦ LIBER ✦

A novel conversion reaction of 4-oxo-4H-1-benzopyran-3-carboxaldehydes to 3-substituted-5-(2-hydroxybenzoyl)-2(1H)-pyridones

✍ Scribed by Akira Nohara; Toshihiro Ishiguro; Yasushi Sanno

Publisher: Elsevier Science
Year: 1974
Tongue: French
Weight: 148 KB
Volume: 15
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)82440-0

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✦ Synopsis

It is well known

that the pyrone ring of chromones is cleaved at C-2

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## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

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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

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## Abstract For Abstract see ChemInform Abstract in Full Text.