882491-37-4Relevant articles and documents
6-HYDROXY-3-[3-HYDROXY-3-METHYL-PENTA-1,4-DIENYL]-2,4,4-TRIMETHYL-CYCLOHEXA-2,5-DIEN-1-ONE
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Page/Page column 17, (2018/02/20)
The present invention relates to a process for preparing 6-hydroxy-3-[3-hydroxy-3- methyl-penta-1,4-dienyl]-2,4,4-trimethyl-cyclohexa-2,5-dien-1 -one of the formula (I). The invention also relates to 6-hydroxy-3-[3-hydroxy-3-methyl-penta-1,4-dienyl]-2,4,4
Synthese von Astaxanthin aus β-Jonon. I. Erschliessung der enantiomeren C15-Wittigsalze durch chemische und mikrobiologische Racematspaltung von (+/-)-3-Acetoxy-4-oxo-β-jonon
Becher, Elisabeth,Albrecht, Robert,Bernhard, Kurt,Leuenberger, Hans G. W.,Mayer, Hans,et al.
, p. 2419 - 2435 (2007/10/02)
Racemic 3-acetoxy-4-oxo-β-ionone (10) was synthesized from the industrially accessible intermediate β-ionone (5).Resolution of 10 into its enantiomers was achieved via the corresponding diastereometric camphanates and by microbial resolution.Site-selective alkylation of racemic and of optically pure 3-acyloxy-4-oxo-β-ionones with vinyl magnesium chloride at -70 deg furnished the corresponding 3-acyloxy-4-oxo-9-vinyl-β-ionols which could be transformed to the Wittig salts 1, 3 and 4, respectively, following known procedures .