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Method for producing organic compound and method for decomposing compound having dicarboxyimide skeleton

A technology of organic compounds and dicarboximides, applied in the preparation of organic compounds, organic chemical methods, organic chemistry, etc.

Inactive Publication Date: 2008-03-26
DAICEL CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, when such catalyst-derived impurities are contained in compounds such as terephthalic acid or pyromellitic acid used as a raw material for polyester or polyimide, there may be disadvantages such as inhibition of polymerization and deterioration of the resulting polymer. Coloring, because said impurities usually contain nitrogen atoms

Method used

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  • Method for producing organic compound and method for decomposing compound having dicarboxyimide skeleton
  • Method for producing organic compound and method for decomposing compound having dicarboxyimide skeleton
  • Method for producing organic compound and method for decomposing compound having dicarboxyimide skeleton

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preparation example Construction

[0040] The method for producing an organic compound according to the present invention includes reacting a reactant in the presence of a catalyst including a compound having a dicarboximide skeleton represented by formula (i). The method further includes the step of treating the reaction product with hot water to decompose and remove impurities originating from the aforementioned catalyst. In the hot water treatment step, the compound having a dicarboximide skeleton represented by formula (i') as the aforementioned catalyst or a denatured product of the catalyst can be decomposed into low molecular weight compounds and / or easily water-soluble compounds. Therefore, the target compound can be prepared with high purity by subsequent simple separation steps. Among the compounds having a dicarboximide skeleton represented by the formula (i'), the compound wherein Z is an -OR group corresponds to the compound represented by the formula (i), that is, a catalyst; and wherein Z is a hy...

Embodiment 1

[0205] Use a reactor equipped with a reflux condenser, a stirrer, a flow meter, a feed line, a gas supply line, a reaction mixture discharge line, an exhaust line, a pressure gauge and a pressure regulator, in a gas-liquid-continuous reaction mode react. The acetic acid mixture is continuously fed to the reactor, and air is continuously introduced into the reactor so that the oxygen concentration in the exhaust line at the bottom of the reactor is 3% to 6%, at a temperature of 170°C and a pressure of 2MPa The reaction was carried out at a residence time of 2 hours, and the reaction mixture was continuously discharged from the reaction system. The acetic acid mixture fed included 10 weight percent p-xylene, 0.5 weight percent N,N',N"-trihydroxyisocyanuric acid, 0.23 weight percent manganese(II) acetate tetrahydrate and 0.09 weight percent Cobalt (II) acetate tetrahydrate.The obtained reaction mixture is cooled to room temperature to precipitate crystals, and the crystals are c...

Embodiment 2

[0207] The procedure of Example 1 was carried out except that hot water treatment was carried out at 60° C. for one hour. The hot water treated crystals had a nitrogen content of 130 parts per million by weight.

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Abstract

It is intended to provide a method for efficiently obtaining a desired compound with high purity by easily removing an impurity derived from a catalyst from a reaction product obtained by using a compound having a dicarboxyimide skeleton as the catalyst. The method for producing an organic compound of the invention comprises the step of decomposing and removing the impurity derived from the catalyst by treating the reaction product with hot water in the method for producing an organic compound by reacting a substrate in the presence of the catalyst composed of a compound having a dicarboxyimide skeleton represented by the following formula (i) (wherein R represents a hydrogen atom or a protecting group for a hydroxyl group). The temperature of hot water is preferably 100 DEG C or higher.

Description

technical field [0001] The present invention relates to a method of producing an organic compound using a catalyst including a compound having a dicarboximide skeleton, and a method of decomposing the compound having a dicarboximide skeleton. Background technique [0002] When a compound having a dicarboximide skeleton such as a cyclic imide compound or a cyclic acylurea compound is used as a catalyst, various reactants can satisfactorily undergo various free radicals under mild conditions. reaction to efficiently obtain various useful organic compounds (Patent Documents 1 to 6). For example, by oxidizing an aromatic compound having an alkyl group bonded to an aromatic ring with oxygen in the presence of such a catalyst, the alkyl group is efficiently oxidized, and therefore, aromatic carboxylic acids such as para Phthalic acid or pyromellitic acid. In addition, by oxidizing a non-aromatic cyclic hydrocarbon such as cyclohexane with oxygen in the presence of the catalyst, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/487C07B61/00C07C63/26
CPCC07C51/265C07C51/487C07B61/00Y02P20/55
Inventor 平井成尚桑名淳
Owner DAICEL CHEM IND LTD