SYNTHESIS OF (3S,4R,3'S,4'R)- AND (3S,4S,3'S,4'S)-CRUSTAXANTHINS AND FURTHER COMPOUNDS WITH 3,4-DIHYDROXY BETA-END-GROUPS

Synthesis of (3S,4R,3′S,4′R)‐ and (3S,4S,3′S,4′S)‐Crustaxanthins and Further Compounds with 3,4‐Dihydroxy β‐End‐groups Starting from 3, the enantiomerically pure title compounds were synthesized in eight steps. Spectra and HPLC systems are presented that allow a distinction between these isomers. Copyright © 1990 Verlag GmbH & Co. KGaA, Weinheim