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Stereoselective hetero-Diels–Alder reactions: structure determination of new xanthenedione derivatives by NMR spectroscopy and x-ray crystallography

✍ Scribed by Anne Giraud; Patrice Vanelle; Luc Giraud

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 119 KB
Volume: 37
Category: Article
ISSN: 0749-1581
DOI: 10.1002/(sici)1097-458x(199901)37:1<77::aid-mrc397>3.0.co;2-q

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✦ Synopsis

The proton and carbon spectra of chromane derivatives were completely assigned by the use of 1H, 13C and 2D NMR spectroscopy, including NOESY and 2D INADEQUATE. The unambiguous conÐgurational assignments of all regioisomers were achieved via 2D NOESY. The structure of the regioisomer 7A was conÐrmed using x-ray di †raction.

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