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A method for the production of canthaxanthin and astaxanthin

机译:一种生产角黄素和虾青素的方法

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.
机译:通式为I……的邻苯二黄嘌呤(Ia)和虾青素(Ib)的制备方法,其中R代表H(a)或OH(b),该方法的特征在于一般的叔醇使R代表H(a)或OH(b)的式II……与三氟乙酸反应,将通式Ⅲ所得的新型三氟乙酸酯与三苯基膦反应,将新型的三苯基膦三氟乙酸酯反应在Wittig合成的条件下,将由通式IV……制得的化合物与2,7-二甲基-2,4,6-辛三烯-1,8-二丁酯反应。另外,本发明涉及式III的新型三氟乙酸盐和相应的式IV的三苯基tri三氟乙酸盐。

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