PROCESS FOR THE PREPARATION OF $g(a)-OXOALDEHYDES

Title:

PROCESS FOR THE PREPARATION OF $g(a)-OXOALDEHYDES

Document Type and Number:

WIPO Patent Application WO/1999/059948

Kind Code:

A1

Abstract:

$g(a)-Oxoaldehydes are prepared by subjecting an alkylene glycol to the gas-phase reaction in the presence of an alcohol (a), oxygen and a catalyst (a) (first stage reaction). The aldehydes are further converted into $g(a)-oxocarboxylic esters by the gas-phase reaction thereof with an alcohol (b) or an olefin in the presence of oxygen and a catalyst (b) (second stage reaction). It is preferable that the alcohol (a) be the same as the alcohol (b). The processes can give $g(a)-oxoaldehydes and $g(a)-oxocarboxylic esters in enhanced yields.

Inventors:

ARITA YOSHITAKA (JP)
OHTA AKIHIKO (JP)
SAITO NOBORU (JP)
ARIYOSHI KIMIO (JP)

Application Number:

PCT/JP1999/002633

Publication Date:

November 25, 1999

Filing Date:

May 19, 1999

Export Citation:

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Assignee:

NIPPON CATALYTIC CHEM IND (JP)
ARITA YOSHITAKA (JP)
OHTA AKIHIKO (JP)
SAITO NOBORU (JP)
ARIYOSHI KIMIO (JP)

International Classes:

C07C45/37; C07C45/38; C07C45/39; C07C67/39; (IPC1-7): C07C45/37; C07C47/127; C07C49/185; C07C67/36; C07C69/716

Foreign References:

JPH09118650A	1997-05-06
JPH09268156A	1997-10-14
JPH0341046A	1991-02-21
JPS60199846A	1985-10-09
JPS5217408A	1977-02-09

Other References: