Synthesis of (S)-Plectaniaxanthin Summary The optically active C,,-end group (S)-5, prepared from the C,-aldehyde (R)-4 (ex L-serine (2)), has been used for the synthesis of (S)-plectaniaxanthin (1). The (R)- chirality of natural 1 assigned by Rsnneberg et al. [6] is confirmed. ... Einleitung und Problemstellung. - Plectaniaxanthin (3',4'-Didehydro-lf,2'-dihydro- P,u/-carotin-lf,2'-diol; l), ein Carotinoid mit der chiralen 1,2-Dihydroxy-3,4-dide- hydroy -Endgruppe, wurde ...
