Isomerization of (all-E)-cucurbitaxanthin A

Authors
Molnar, P Deli, J Matus, Z Toth, G Renneberg, D Pfander, H
Citation
P. Molnar et al., Isomerization of (all-E)-cucurbitaxanthin A, HELV CHIM A, 83(7), 2000, pp. 1535-1541
Citations number
17
Categorie Soggetti
Chemistry & Analysis",Chemistry
Journal title
HELVETICA CHIMICA ACTA
ISSN journal
0018019X → ACNP
Volume
83
Issue
7
Year of publication
2000
Pages
1535 - 1541
Database
ISI
SICI code
0018-019X(2000)83:7<1535:IO(A>2.0.ZU;2-F
Abstract
Cucurbitaxanthin A (= (all-E,3S,5R,6R,3'R)-3,6-epoxy-5,6-dihydro-beta,beta- carotene-5,3'-diol; 1) was submitted to thermal isomerization and to I-2-ca talysed photoisomerization. The structure of the main reaction products (9Z )- (2), (9'Z)- (3), (13Z)- (4), and (13'Z)-cucurbitaxanthin A (5) was deter mined by their UV/VIS, CD, H-1-NMR, and mass spectra.