Process for preparing arylacetaldehydes
    12.
    发明授权
    Process for preparing arylacetaldehydes 失效
    芳基乙醛的制备方法

    公开(公告)号:US4338467A

    公开(公告)日:1982-07-06

    申请号:US233148

    申请日:1981-02-10

    IPC分类号: C07C45/49

    CPC分类号: C07C45/49

    摘要: A process for preparing an arylacetaldehyde by reacting the corresponding arylmethyl halide with carbon monoxide and hydrogen in the presence of a cobalt compound and a basic reagent in a liquid medium, characterized in that the basic reagent is an alkali metal compound and the liquid medium is a solvent system chosen from nitriles and their mixtures with hydrocarbons, whereby the arylacetaldehyde can be produced in a good yield by the use of a small amount of the cobalt compound as the catalyst.

    摘要翻译: 在液体介质中,在钴化合物和碱性试剂存在下,使相应的芳基甲基卤化物与一氧化碳和氢气反应制备芳基乙醛的方法,其特征在于碱性试剂是碱金属化合物,液体介质是 选自腈和其与烃的混合物的溶剂体系,由此通过使用少量的钴化合物作为催化剂,可以以良好的产率制备芳基乙醛。

    Process for producing allylic alcohols
    14.
    发明授权
    Process for producing allylic alcohols 失效
    烯丙醇的制备方法

    公开(公告)号:US5004843A

    公开(公告)日:1991-04-02

    申请号:US529730

    申请日:1990-05-29

    摘要: Process for preparing predominantly Z-substituted allylic alcohols of the formula: ##STR1## wherein R.sup.1 is a straight or branched C.sub.1 -C.sub.25 alkyl group optionally bearing at least one substituent and/or at least one unsaturated linkage and R.sup.2 is a hydrogen atom or a methyl group, which comprises reacting a vinyl epoxide of the formula: ##STR2## wherein R.sup.2 is as defined above with an organolithium compound of the formula above. More particularly, there is disclosed a process for R.sup.1 --Li wherein R.sup.1 is as defined above; particularly, process for preparing .alpha.-santalol of the formula: ##STR3## which comprises reacting 3-methyl-3,4-epoxybutene-1 with lithiomethyl-2,3-dimethyltricyclo[2.2.1.0.sup.2,6 ]heptane.

    摘要翻译: 主要制备下式的Z取代的烯丙醇的方法:其中R 1是任选带有至少一个取代基的直链或支链C 1 -C 25烷基和/或至少一个不饱和键,并且R 2是氢原子或 甲基,其包括使下式的乙烯基环氧化物:其中R 2如上定义,与上式的有机锂化合物反应。 更具体地,公开了R1-Li的方法,其中R1如上所定义; 特别是制备下式的α-檀香醇的方法:包括使3-甲基-3,4-环氧丁烯-1与二硫代甲基-2,3-二甲基三环[2.2.1.0 2,6]庚烷反应。

    Racemization of an optically active lysine alkyl ester
    15.
    发明授权
    Racemization of an optically active lysine alkyl ester 失效
    光学活性赖氨酸烷基酯的外消旋化

    公开(公告)号:US4169207A

    公开(公告)日:1979-09-25

    申请号:US916939

    申请日:1978-06-19

    CPC分类号: C07C233/36

    摘要: An optically active lysine alkyl ester.dihydrochloride is racemized by heating at 100.degree. C. to 250.degree. C. under an atmosphere of hydrogen. By combining this process with asymmetric hydrolysis of racemic lysine alkyl ester with enzymes, racemic lysine alkyl ester can be converted all to L-lysine.

    摘要翻译: 光学活性赖氨酸烷基酯二盐酸盐通过在氢气气氛下在100℃加热至250℃进行外消旋化。 通过将该方法与外消旋赖氨酸烷基酯与酶的不对称水解相结合,外消旋赖氨酸烷基酯可全部转化为L-赖氨酸。