Process for preparing-diketone compound and process for preparing metal complex thereof
申请人:Saito Makoto
公开号:US20050119466A1
公开(公告)日:2005-06-02
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.
本发明揭示了一种制备2,2,6,6-四甲基-3,5-庚二酮的方法,包括在以戊二酸酯为溶剂但不使用其他溶剂的条件下,在碱金属烷氧化物催化剂存在下,将戊二酸酯烷基酯与邻苯二酮反应,或者在酰胺型或脲型溶剂存在下,在碱金属烷氧化物催化剂存在下,将戊二酸酯烷基酯与邻苯二酮反应。本发明还揭示了一种使用上述方法得到的2,2,6,6-四甲基-3,5-庚二酮制备2,2,6,6-四甲基-3,5-庚二酮金属配合物的方法。本发明的制备2,2,6,6-四甲基-3,5-庚二酮的方法具有工业优势,可以使用易于处理的碱金属烷氧化物作为催化剂,从戊二酸酯烷基酯和邻苯二酮制备2,2,6,6-四甲基-3,5-庚二酮。