942419-98-9

Basic information

• Product Name: 4-trimethylsilyloxy-β-ionone 9-ethylene ketal
• Synonyms: 4-trimethylsilyloxy-β-ionone 9-ethylene ketal
• CAS NO: 942419-98-9
• Molecular Weight: 322.52
• Mol File: 942419-98-9.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 4-trimethylsilyloxy-β-ionone 9-ethylene ketal(CAS DataBase Reference)
• NIST Chemistry Reference: 4-trimethylsilyloxy-β-ionone 9-ethylene ketal(942419-98-9)
• EPA Substance Registry System: 4-trimethylsilyloxy-β-ionone 9-ethylene ketal(942419-98-9)

Safety Data

• Hazardous Substances Data: 942419-98-9(Hazardous Substances Data)

Upstream product

• 75-77-4 chloro-trimethyl-silane 
• 69659-83-2 4-Oxo-β-jonon-9-(aethylenacetal) 

Downstream Products

• 74285-61-3 (+/-)-3-Hydroxy-4-oxo-β-jonon 

Relevant articles and documents

PROCESS FOR THE SYNTHESIS OF INTERMEDIATES FOR THE PREPARATION OF ASTAXANTHIN

The present invention relates to a process for the preparation of intermediates useful in the synthesis of Astaxanthin, in particular C15-Wittig salts, but also 4-oxo-β-ionones, 3-hydroxy-4-oxo-β-ionones and the aryl esters thereof. 4-oxo-β-ionone is prepared by starting from a β-ionone by oxidation with bromates in the presence of iodine or iodide. 3-hydroxy-4-oxo-β-ionone is prepared in 4 steps, starting from 4 -oxo- β-ionone by oxidation with peracids; the aryl esters thereof are solids that are easily isolated and purified by crystallisation, and may be converted in 5 steps to C15-Wittig salts and finally, by the Wittig reaction, to Astaxanthin.