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Title:
PROCESS FOR PREPARING -DIKETONE COMPOUND AND PROCESS FOR PREPARING METAL COMPLEX THEREOF
Document Type and Number:
WIPO Patent Application WO2003059858
Kind Code:
A3
Abstract:
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.

Inventors:
SAITO MAKOTO (JP)
UEDA TAKASHI (JP)
TANI TAKASHI (JP)
Application Number:
JP0213238W
Publication Date:
April 22, 2004
Filing Date:
December 18, 2002
Export Citation:
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Assignee:
SHOWA DENKO KK (JP)
SAITO MAKOTO (JP)
UEDA TAKASHI (JP)
TANI TAKASHI (JP)
International Classes:
C07C45/45; C07C45/77; C07C49/12; C07C49/92; (IPC1-7): C07C45/45; C07C45/77; C07C49/12; C07C49/92
Foreign References:
EP0454624A11991-10-30
Other References:
SWAELENS, G. ET AL: "NMR experiments on acetals. XXVI. Influence of.beta.-substitution on geminal coupling values in 1,3-dioxanes", BULLETIN DES SOCIETES CHIMIQUES BELGES (1970), 79(7-8), 441-50, XP000983130
CHEMICAL ABSTRACTS, vol. 116, no. 19, 11 May 1992, Columbus, Ohio, US; abstract no. 193677, WU, YUEHUAN ET AL: "Synthesis of 2,2,6,6-tetramethylheptane-3,5-dione (dipivaloylmethane)" XP002248216
CHEMICAL ABSTRACTS, vol. 126, no. 7, 17 February 1997, Columbus, Ohio, US; abstract no. 98457, REES, WILLIAM S., JR. ET AL: "Tris(2,2,6,6-tetramethyl-3,5-heptanedionato)yttrium" XP002248217
DATABASE WPI Section Ch Week 200255, Derwent World Patents Index; Class E12, AN 1994-124127, XP002248218
PATENT ABSTRACTS OF JAPAN vol. 018, no. 030 (C - 1153) 17 January 1994 (1994-01-17)
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