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Hydrogénation de sels de flavylium: formation de composés heptacycliques; structure radiocristallographique du [tétrahydro‐10b,10c,16,16a‐diméthyl‐16,16a‐méthylène‐10b,16‐5a H ‐di(benzo[1]pyranno)[4,3‐ b :3′,4′,‐ c ;2,3:2′,3′]‐benz[1]oxépinyl‐5a]‐2‐phénol
Author(s) -
Jolibois Henri,
Vebrel Joël,
Ouahab Lahcene,
Boultif Ahmed,
Grandjean Daniel
Publication year - 1988
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19880710128
Subject(s) - chemistry , crystal structure , methylene , mass spectrum , stereochemistry , phenol , catalysis , medicinal chemistry , nmr spectra database , spectral line , organic chemistry , ion , physics , astronomy
Hydrogenation of Flavylium Salts: Formation of Heptacyclic compounds; X‐Ray Crystal Structure of 2‐[10b,10c,16,16a‐Tetrahydro‐16,16a‐dimethyl‐10b,16‐methylene‐5a H ‐di[1]benzopyrano[4,3‐ b :3′,4′ ‐ c ; 2,3:2′,3′][1]benzoxepin‐5a‐yl]phenol The hydrogenation of flavylium salts 1 either by catalytic reduction or by chemical reduction afforded the unexpected heptacyclic compound 2 , the structure of which was determined by X‐ray analysis. The latter was confirmed by 1 H‐NMR and mass spectra.