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A method for the production of canthaxanthin and astaxanthin
A method for the production of canthaxanthin and astaxanthin
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机译:一种生产角黄素和虾青素的方法
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摘要
Process for the preparation of canthaxanthine (Ia) and astaxanthine (Ib) of the general formula I …IMAGE… in which R represents H (a) or OH (b), which process is characterised in that a tertiary alcohol of the general formula II …IMAGE… in which R represents H (a) or OH (b), is reacted with trifluoroacetic acid, the novel trifluoroacetate obtained of the general formula III …IMAGE… is reacted with triphenylphosphine, the novel triphenylphosphonium trifluoroacetate obtained of the general formula IV …IMAGE… is reacted with 2,7-dimethyl-2,4,6-octatriene-1,8-dial under the conditions of a Wittig synthesis. In addition, the invention relates to the novel trifluoroacetates of the formula III and the corresponding triphenylphosphonium trifluoroacetates of the formula IV.
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