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Method for preparing di- or tricarboxylic esters by alkoxycarbonylation of dienes having conjugated double bonds

A technology of alkyl and diene, which is applied to the preparation of organic compounds, the preparation of carbon monoxide or formate reaction, and the preparation of carboxylate, etc., which can solve the problems of increasing the cost of the preparation process and generating waste, and achieve easy two-or Tricarboxylate, the effect of easy preparation

Active Publication Date: 2018-01-26
EVONIK OPERATIONS GMBH
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  • Abstract
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Problems solved by technology

However, the reaction has the disadvantage that it is carried out in two steps and that a different catalyst complex must be used in each step
This unnecessarily generates waste and increases the cost of the manufacturing process

Method used

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  • Method for preparing di- or tricarboxylic esters by alkoxycarbonylation of dienes having conjugated double bonds
  • Method for preparing di- or tricarboxylic esters by alkoxycarbonylation of dienes having conjugated double bonds
  • Method for preparing di- or tricarboxylic esters by alkoxycarbonylation of dienes having conjugated double bonds

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Embodiment Construction

[0084] The following examples illustrate the invention.

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Abstract

The invention relates to a method for preparing di- or tricarboxylic esters by alkoxycarbonylation of dienes having conjugated double bonds. The method steps of: a) initially charging a diene having two conjugated double bonds; b) adding a phosphine ligand and a catalyst precursor selected from palladium dichloride, palladium dibromide, palladium diiodide, palladium(II) acetylacetonate, palladium(II) acetate, bis(dibenzylideneacetone)palladium, bis(acetonitrile)dichloropalladium(II), palladium (cinnamyl) dichloride; c) adding an alcohol; d) feeding in CO; and e) heating the reaction mixture, with conversion of the diene to a di- or tricarboxylic ester.

Description

technical field [0001] The present invention relates to a novel process for the preparation of di- or tricarboxylic acid esters by alkoxycarbonylation of dienes having conjugated double bonds. Background technique [0002] Dienes (1,3-dienes) with conjugated double bonds, especially 1,3-butadiene and isoprene, have wide applications in the chemical industry and are used, for example, as basic materials for the production of synthetic rubbers . Another promising application is the alkoxycarbonylation of 1,3-dienes to give dicarboxylic acids and corresponding esters. [0003] Alkoxycarbonylation refers to the reaction of ethylenically unsaturated compounds such as dienes with carbon monoxide and alcohols in the presence of metal / metal complexes and ligands to give the corresponding esters. The following scheme shows the general reaction equation for the alkoxycarbonylation of ethylenically unsaturated compounds. [0004] [0005] It is known that by using this method, fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/38C07C69/34C07C69/612
CPCB01J31/2495C07C67/38B01J2231/349B01J2231/321C07C69/34C07C69/612B01J31/24C07C67/62C07C69/44B01J2531/824B01J27/13
Inventor 董开武R.雅克施特尔M.贝勒D.弗里达格D.黑斯K.M.迪巴拉F.盖伦R.弗兰克
Owner EVONIK OPERATIONS GMBH
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