[EN] PROCESS FOR THE PREPARATION OF STEREOISOMERIC PURE C9-ACETALS<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ACÉTALS C9 PURS STÉRÉOISOMÈRES
申请人:BASF SE
公开号:WO2018114733A1
公开(公告)日:2018-06-28
The present invention relates to a process for the stereoselective preparation of a compound of the general formula S,S-Ior R,R-I, having an enantiomeric and diastereomeric purity of at least 90%,wherein R1 is C1-C4-alkyl, C2-C4-alkenyl, C2-C4-alkinyl, phenyl or benzyl, where phenyl and benzyl are unsubstituted or carry one or two radicals R1a, selected from halogen, C1-C3-alkyl and C1-C3-alkoxy, and to a process for the preparation of (3S,3'S)-astaxanthin or (3R,3'R)-astaxanthin, where the compounds of the general formula S,S-I or R,R-I are employed.
本发明涉及一种用于立体选择性制备具有至少90%对映体和异构体纯度的一般式S,S-I或R,R-I化合物的方法,其中R1是C1-C4-烷基,C2-C4-烯基,C2-C4-炔基,苯基或苄基,其中苯基和苄基未取代或带有一个或两个来自卤素,C1-C3-烷基和C1-C3-烷氧基的基团R1a的基团,以及一种用于制备(3S,3'S)-虾青素或(3R,3'R)-虾青素的方法,其中使用了一般式S,S-I或R,R-I的化合物。