Process for the production of di-n-propylacetic acid
    1.
    发明授权
    Process for the production of di-n-propylacetic acid 失效
    生产二正丙基乙酸的方法

    公开(公告)号:US4317925A

    公开(公告)日:1982-03-02

    申请号:US060559

    申请日:1979-07-25

    摘要: A process for the preparation of di-n-propylacetic acid which comprises the steps ofA. converting n-valeraldehyde-diallyl acetal into allyl-1-pentenyl ether by cleaving one mol of allyl alcohol per one mol of n-valeraldehye-diallyl acetal;B. rearranging the allyl-1-pentenyl ether thermally into 2-propyl-pent-4-en-1-al,C. partially hydrogenating the 2-propyl-pent-en-1-al catalytically to form 2-propyl valeraldehyde, andD. oxidizing the 2-propyl valeraldehyde to form dipropyl-acetic acid.

    摘要翻译: 一种制备二正丙基乙酸的方法,其包括以下步骤:通过每1摩尔正缬氨酸二烯丙基缩醛裂解一摩尔烯丙醇,将正戊醛 - 二烯丙基缩醛转化为烯丙基-1-戊烯基醚 ; B.将烯丙基-1-戊烯基醚热重排为2-丙基 - 戊-4-烯-1-醇,C.催化部分氢化2-丙基戊-1-烯,形成2-丙基戊醛, 和D.氧化2-丙基戊醛形成二丙基 - 乙酸。

    Process for preparing 2-methyl-2-sec.butyl-1,3-propanediol
    6.
    发明授权
    Process for preparing 2-methyl-2-sec.butyl-1,3-propanediol 失效
    制备2-甲基-2-间丁基-1,3-丙二醇的方法

    公开(公告)号:US4317945A

    公开(公告)日:1982-03-02

    申请号:US178396

    申请日:1980-08-15

    摘要: A process for the preparation of 2-methyl-2-sec.butyl-1,3-propanediol comprising hydroformylating 2-methyl-1-butene with carbon monoxide and hydrogen in the presence of a first catalyst to form the substance 3-methyl-pentanal, condensing said substance with formaldehyde, or a compound which forms formaldehyde under the conditions of condensation in a basic medium to form alpha-sec.butyl-acrolein, partially hydrogenating said acrolein in the presence of a second catalyst to form the material 2,3-dimethyl pentanal, and converting said material into said diol by treatment with formaldehyde, or a compound which forms formaldehyde under the conditions of conversion, in the presence of a strong base as a third catalyst.The compound of the present invention is useful as an intermediate in the production of pharmaceuticals and drugs; in particular, the production of carbamates which are useful as tranquilizers and blood pressure lowering agents.

    摘要翻译: 一种制备2-甲基-2-仲丁基-1,3-丙二醇的方法,包括在第一催化剂存在下,将2-甲基-1-丁烯与一氧化碳和氢气进行甲酰化,形成3-甲基-2- 戊醛,用甲醛缩合所述物质,或在碱性介质中在冷凝条件下形成甲醛以形成α-仲丁基丙烯醛的化合物,在第二催化剂存在下部分氢化所述丙烯醛以形成材料2, 并通过用甲醛处理或在转化条件下形成甲醛的化合物在作为第三催化剂的强碱存在下将所述物质转化成所述二醇。 本发明化合物可用作药物和药物生产中的中间体; 特别是生产可用作镇定剂和降血压剂的氨基甲酸酯。