2-Alkyl-2,4-diacyloxy-but-3-enals
    4.
    发明授权
    2-Alkyl-2,4-diacyloxy-but-3-enals 失效
    2-烷基-2,4-二酰氧基 - 丁-3-烯醛

    公开(公告)号:US4506096A

    公开(公告)日:1985-03-19

    申请号:US473773

    申请日:1983-03-10

    CPC分类号: C07C69/007 C07C67/29

    摘要: 2-Alkyl-2,4-diacyloxy-but-3-enals of the formula ##STR1## where R.sup.1 is alkyl and R.sup.2 is hydrogen, alkyl, a cycloaliphatic radical or an aromatic radical, are prepared by reacting a buta-1,3-diene of the formula ##STR2## with an oxygen donor. The new compounds are valuable intermediates in the preparation of terpenes, e.g. retinal, .beta.-carotin and apocarotinoids.

    摘要翻译: 其中R 1是烷基且R 2是氢,烷基,脂环族基团或芳族基团,其中R1是2-烷基-2,4-二酰氧基 - 丁-3-烯,其中R1是烷基,R2是氢,烷基, 具有式(III)的3-二烯与氧供体。 新化合物是制备萜烯的有价值的中间体,例如 视网膜,β-胡萝卜素和去角质素。

    Preparation of 4-acyloxy-2-methyl-crotonaldehydes
    8.
    发明授权
    Preparation of 4-acyloxy-2-methyl-crotonaldehydes 失效
    4-酰氧基-2-甲基 - 巴豆醛的制备

    公开(公告)号:US4284796A

    公开(公告)日:1981-08-18

    申请号:US78722

    申请日:1979-09-25

    CPC分类号: C07C67/29

    摘要: A process for the preparation of a 4-acyloxy-2-methyl-crotonaldehyde of the formula ##STR1## where R is hydrogen or an aliphatic radical of 1 to 5 carbon atoms, by reacting a 1,1,4-triacyloxy-2-methyl-but-2-ene of the formula ##STR2## where R.sup.1 and R.sup.2 are each hydrogen or an aliphatic radical of 1 to 5 carbon atoms, with water in the presence of a carboxylic acid of the formulaR--COOH III.

    摘要翻译: 制备式“IMAGE”的4-酰氧基-2-甲基 - 巴豆醛的方法,其中R是氢或1至5个碳原子的脂族基团,通过使1,1,4-三酰氧基-2- 其中R 1和R 2各自为氢或具有1至5个碳原子的脂肪族基团,在式R-COOH III的羧酸存在下与水反应。

    Preparation of diacyloxyhexadienes from hexatrienes
    10.
    发明授权
    Preparation of diacyloxyhexadienes from hexatrienes 失效
    从己三烯制备二酰氧基己二烯

    公开(公告)号:US4468525A

    公开(公告)日:1984-08-28

    申请号:US490152

    申请日:1983-04-29

    CPC分类号: C07C69/007 C07C67/055

    摘要: A process for the preparation of a diacyloxyhexadiene of the formula ##STR1## where X is R.sup.9 -CO- and R.sup.1 to R.sup.9 are hydrogen or alkyl of 1 to 3 carbon atoms, by reacting a hexatriene of the formula ##STR2## with oxygen and a carboxylic acid of the formula R.sup.9 COOH in the presence of a catalyst which contains palladium, platinum or a salt of these metals.

    摘要翻译: 通过使式II'的六烯与氧反应制备式I的二酰氧基己二烯的方法,其中X为R 9 -CO-和R 1至R 9为氢或1至3个碳原子的烷基 和式R9COOH的羧酸在含有钯,铂或这些金属的盐的催化剂存在下进行。