The present invention relates to a new process for the preparation of one of the enantiomers of 3,4-dihydroxy-2,6,6-trimethylcyclohex-2-enoneand to a process for preparing (3S,3'S)-astaxanthin, which comprises the step of providing the (4S)-enantiomerof 3,4-dihydroxy-2,6,6-trimethylcyclohex-2-enone.
本发明涉及一种制备3,4-二羟基-2,6,6-三甲基环己-2-烯酮对映体之一的新工艺,以及制备(3S,3'S)-
虾青素的工艺,其中包括提供3,4-二羟基-2,6,6-三甲基环己-2-烯酮的(4S)-对映体的步骤。