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公开(公告)号:US4268444A
公开(公告)日:1981-05-19
申请号:US94986
申请日:1979-11-16
申请人: Hagen Jaedicke
发明人: Hagen Jaedicke
IPC分类号: C07C47/21 , C07C67/00 , C07C401/00 , C07C403/00 , C07C403/14 , C07C403/16 , C07D319/06 , C07C45/45 , C07D319/04
CPC分类号: C07D319/06 , C07C403/14 , C07C2101/16
摘要: A process for the preparation of polyene-aldehydes, derived from 2,6-dimethyl-2,4,6,8-nonatetraen-1-al by substitution in the 9-position, by means of the Wittig ylide synthesis. The process is based on the observation, contrary to all expectation, that on reacting 2,6-dimethyl-octa-2,4,6-triene-1,8-dial with an equimolar amount of an ylide, it is exclusively the 8-al group of the dialdehyde which reacts. This specificity of the reaction is of particular importance for the preparation of the food dye .beta.-apo-8'-carotinal.
摘要翻译: 通过Wittig内鎓盐合成制备衍生自2,6-二甲基-2,4,6,8-壬四烯-1-醇的在9-位取代的多烯醛的方法。 该过程基于观察,与所有预期相反,在2,6-二甲基 - 八氢-2,4,6-三烯-1,8-表盘与等摩尔量的内鎓盐反应中,仅仅是8 一组二醛反应。 反应的这种特异性对于制备食品染料β-8-8-胡萝卜素是特别重要的。