Synthesis of cyclic ethers
    5.
    发明授权
    Synthesis of cyclic ethers 失效
    环醚的合成

    公开(公告)号:US4866188A

    公开(公告)日:1989-09-12

    申请号:US637370

    申请日:1984-08-03

    申请人: John A. Scheben

    发明人: John A. Scheben

    IPC分类号: C07D307/08 C07D313/04

    CPC分类号: C07D313/04 C07D307/08

    摘要: A process is disclosed for preparing a cyclic ether which comprises cyclodehydrating a polyhydroxy compound of the general formulaHOR.sup.1 HC--R.sup.2 --CHR.sup.3 OHin which R.sup.1 and R.sup.3, each of which is the same or different, is hydrogen or a lower aliphatic, cycloaliphatic or aryl group and R.sup.2 is a divalent aliphatic group of 1 to 10 carbon atoms containing 0, 1 or 2 etheric oxygen atoms or 0, 1 or 2 secondary or tertiary amine nitrogen atoms and 0, 1 or more lower aliphatic, cycloaliphatic and/or aryl groups containing 0 or 1 hydroxyl groups at elevated temperatures in the presence of a catalytically effective amount of a Group VIII metal catalyst or a Group VIII metal-containing material to provide a cyclic ether of the general formula ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 are as defined above. The process is especially useful for preparing the commercially important cyclic ethers tetrahydrofuran and 1,4-dioxane which are derived from 1,4-butanediol and ethylene glycol and/or diethylene glycol, respectively.

    摘要翻译: 公开了一种制备环醚的方法,该方法包括将通式为HOR1HC-R2-CHR3OH的多羟基化合物环化脱水,其中R 1和R 3各自相同或不同,为氢或低级脂族,脂环族或芳基 并且R 2是含有0,1或2个醚性氧原子或0,1或2个仲胺或叔胺氮原子和0,1或更多个低级脂族,脂环族和/或芳基的含1至10个碳原子的二价脂族基团, 0或1个羟基,在催化有效量的第VIII族金属催化剂或含Ⅷ族金属的物质存在下,在高温下提供通式为“IMAGE”的环醚,其中R 1,R 2和R 3为 如上所述。 该方法特别可用于制备分别衍生自1,4-丁二醇和乙二醇和/或二甘醇的商业上重要的环醚四氢呋喃和1,4-二恶烷。

    Liquid phase process for the production of aromatic aldehydes
    6.
    发明授权
    Liquid phase process for the production of aromatic aldehydes 失效
    用于生产芳香醛的液相方法

    公开(公告)号:US4097533A

    公开(公告)日:1978-06-27

    申请号:US743435

    申请日:1976-11-19

    申请人: John A. Scheben

    发明人: John A. Scheben

    CPC分类号: C07C45/36

    摘要: A process is described for the preparation of aromatic aldehydes such as benzaldehyde and substituted benzaldehydes by the liquid phase oxidation of toluene or substituted toluenes in the presence of a catalyst comprising phosphoric acid and a catalytically effective amount of palladium metal, and a sulfur, phosphorus or nitrogen modifier.

    摘要翻译: 描述了通过在包含磷酸和催化有效量的钯金属的催化剂的存在下,通过甲苯或取代的甲苯的液相氧化制备芳族醛如苯甲醛和取代的苯甲醛的方法,以及硫,磷或 氮改性剂。

    Process for the production of esters
    7.
    发明授权
    Process for the production of esters 失效
    生产酯的方法

    公开(公告)号:US4499298A

    公开(公告)日:1985-02-12

    申请号:US105444

    申请日:1979-12-20

    CPC分类号: C07C67/035

    摘要: A process is described for the preparation of aryl esters such as benzyl acetate by reacting an aryl alkyl compound such as toluene with a carboxylic acid such as acetic acid and oxygen in the presence of a catalytically effective amount of a catalyst comprising palladium metal, gold metal and a metal of Group VA of the Periodic Table of the Elements such as bismuth.

    摘要翻译: 描述了通过使芳基烷基化合物如甲苯与羧酸如乙酸和氧在催化有效量的催化剂的存在下反应制备芳基酯如乙酸苄酯的方法,所述催化剂包括钯金属,金属金属 和元素周期表第VA族金属如铋。