Details

Autor(en) / Beteiligte

• Englert, Gerhard
• Aakemann, Torunn
• Schiedt, Katharina
• Liaaen-Jensen, Synnove

Titel

Structure Elucidation of the Algal Carotenoid (3S,5R,6R,3'S,5'R,6'S)-13'-cis-7',8'-Dihydroneoxanthin-20'-al 3'-β-lactoside (P457). Part 2, Nmr Studies

Ist Teil von

• Journal of natural products (Washington, D.C.), 1995-11, Vol.58 (11), p.1675-1682

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

1995

Quelle

MEDLINE

Beschreibungen/Notizen

• Extensive nmr studies on the algal carotenoid P457 [1], its octaacetate 2, and a heptaacetate 3 resulted in the elucidation of its structure including the C-13'-cis configuration of the cross-conjugated C-20'-al chromophore, the relative stereochemistry of the allenic end group, the presence of an uncommon C-7',C-8'-single bond, the C-5',C-6'-epoxide, and of a beta-lactoside attached to C-3' of the carotenoid. P457 [1] is one of the most structurally complex carotenoids known, and its 1H- and 13C-nmr data have been fully interpreted.