69659-83-2

Upstream product

• 29790-29-2 (E)-2,4,4-trimethyl-3-(3-oxobut-1-en-1-yl)cyclohex-2-enone 
• 107-21-1 ethylene glycol 
• 80713-56-0 4-Oxo-β-jonon-4,9-bis(aethylenacetal) 
• 79-77-6 (E)-β-ionone 

Downstream Products

• 74285-60-2 (+/-)-3-Acetoxy-4-oxo-β-jonon-9-(aethylenacetal) 
• 74285-61-3 (+/-)-3-Hydroxy-4-oxo-β-jonon 
• 74311-44-7 (S)-3-Hydroxy-4-oxo-β-jonon 
• 80779-52-8 (R)-3-Hydroxy-4-oxo-β-jonon 
• 882491-37-4 (6S)-6-hydroxy-3-[(1E)-3-hydroxy-3-methylpenta-1,4-dienyl]-2,4,4-trimethylcyclohex-2-en-1-one 
• 74285-59-9 (E)-3,5,5-trimethyl-2-oxo-4-(3-oxobut-1-en-1-yl)cyclohex-3-en-1-yl acetate 
• 74311-42-5 (S)-3-Acetoxy-4-oxo-β-jonon 
• 942419-98-9 4-trimethylsilyloxy-β-ionone 9-ethylene ketal 

Relevant academic research and scientific papers

Synthese von Astaxanthin aus β-Jonon. I. Erschliessung der enantiomeren C15-Wittigsalze durch chemische und mikrobiologische Racematspaltung von (+/-)-3-Acetoxy-4-oxo-β-jonon

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 .