Process for preparing-diketone compound and process for preparing metal complex thereof
    8.
    发明申请
    Process for preparing-diketone compound and process for preparing metal complex thereof 失效
    制备二酮化合物的方法及其制备金属络合物的方法

    公开(公告)号:US20050119466A1

    公开(公告)日:2005-06-02

    申请号:US10500963

    申请日:2002-12-18

    摘要: Disclosed is a process for preparing 2,2,6,6-tetramethyl-3,5-heptanedione, comprising reacting a pivalic acid alkyl ester with pinacolone in the presence of an alkali metal alkoxide catalyst using a pivalic acid alkyl ester as a solvent but using no other solvent or reacting them in an amide type or urea type solvent in the presence of an alkali metal alkoxide catalyst. Also disclosed is a process for preparing a 2,2,6,6-tetramethyl-3,5-heptanesione metal complex using the 2,2,6,6-tetramethyl-3,5-heptanedione obtained by the above process. The process for preparing 2,2,6,6-tetramethyl-3,5-heptanedione is an industrially advantageous process in which an alkali metal alkoxide that is easy to handle can be used-as a catalyst for preparing 2,2,6,6-tetramethyl-3,5-heptanedione from a pivalic acid alkyl ester and pinacolone.

    摘要翻译: 公开了一种制备2,2,6,6-四甲基-3,5-庚二酮的方法,包括在碱金属醇盐催化剂存在下,使用新戊酸烷基酯作为溶剂使新戊酸烷基酯与频那酮酮反应,但 不使用其它溶剂或在酰胺型或尿素型溶剂中,在碱金属醇盐催化剂的存在下反应。 还公开了使用通过上述方法获得的2,2,6,6-四甲基-3,5-庚二酮制备2,2,6,6-四甲基-3,5-庚内酯金属络合物的方法。 制备2,2,6,6-四甲基-3,5-庚二酮的方法是工业上有利的方法,其中可以使用易于处理的碱金属醇盐 - 作为制备2,2,6,6-四甲基-3,5-庚二酮的催化剂, 由新戊酸烷基酯和频哪醇酮制备6-四甲基-3,5-庚二酮。