106776-90-3

Basic information

• Product Name: semi-astacene
• Synonyms: semi-astacene
• CAS NO: 106776-90-3
• Molecular Weight: 594.835
• Mol File: 106776-90-3.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: semi-astacene(CAS DataBase Reference)
• NIST Chemistry Reference: semi-astacene(106776-90-3)
• EPA Substance Registry System: semi-astacene(106776-90-3)

Safety Data

• Hazardous Substances Data: 106776-90-3(Hazardous Substances Data)

Upstream product

• 5056-17-7 (2E,4E,6E)-2,7-dimethyl-2,4,6-octatrienedial 

Relevant articles and documents

PROCESS FOR THE PREPARATION OF ASTAXANTHIN

The invention therefore relates to a process for the preparation of astaxanthin of the formula I by reacting 2 mol of the triphenylphosphonium salt of the general formula II in which X represents chlorine, bromine or the (HSO4) radical, preferably bromine, in a Wittig reaction with one mol of the C10-dialdehyde of the formula III which is characterized in that a) the starting compounds of the formulae II and III are taken up in a solvent, the mixture is cooled to a temperature of not more than 10°C, preferably -18°C to +5°C, b) about 0.9 to 1.5, preferably 0.9 to 1.2, mol of a base per mole of triphenylphosphonium salt are added to the resulting reaction mixture at a temperature of not more than 10°C, preferably -18°C to +5°C, c) the base is metered and mixed in over a predetermined reaction time T so that at least a ? base equivalent is added to the reaction mixture continuously or quasicontinuously within a timespan T' ?T and the remainder of the base within the remaining reaction time.