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Isolation of a New Carotenoid and Two New Carotenoid Glycosides from Curtobacterium flaccumfaciens pvar poinsettiae
Author(s) -
Häberli Adrian,
Bircher Christof,
Pfander Hanspeter
Publication year - 2000
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/(sici)1522-2675(20000216)83:2<328::aid-hlca328>3.0.co;2-n
Subject(s) - carotenoid , chemistry , glycoside , derivative (finance) , stereochemistry , isolation (microbiology) , extraction (chemistry) , food science , organic chemistry , microbiology and biotechnology , biology , financial economics , economics
An efficient method for the extraction of the carotenoids from Curtobacterium flaccumfaciens pvar poinsettiae was developed. The glucosides of C.p. 450 (=(all‐ E ,2 R ,2′ R )‐2‐[4‐( β ‐ D ‐glucopyranosyloxy)‐3‐methylbut‐2‐enyl]‐2′‐(4‐hydroxy‐3‐methylbut‐2‐enyl)‐ β , β ‐carotene; 4 ) and of C.p. 473 (=(all‐ E ,2 R ,2′ S )‐2‐[4‐( β ‐ D ‐glucopyranosyloxy)‐3‐methylbut‐2‐enyl]‐2′‐(3‐methylbut‐2‐enyl)‐3′,4′‐didehydro‐1′,2′‐dihydro‐ β , ψ ‐caroten‐1′‐ol; 5 ) were isolated for the first time. In addition, the hitherto unknown 3′,4′‐dihydro derivative of C.p. 450 , called C.p. 460 (=(all‐ E ,2 R ,2′ R )‐2‐(4‐hydroxy‐3‐methylbut‐2‐enyl)‐2′‐(3‐methylbut‐2‐enyl)‐1′,2′‐dihydro‐ β , ψ ‐caroten‐1′‐ol; 6 ), was identified. The structures were established by UV/VIS, CD, 1 H‐ and 13 C‐NMR, and mass spectra.