Process for the preparation of di- or tricarboxylates by alkoxycarbonylation of dienes with conjugated double bonds
A technology of alkoxycarbonyl and conjugated double bonds, which is applied in the field of preparing di- or tricarboxylic acid esters through the alkoxycarbonylation of dienes with conjugated double bonds, which can solve the problem of waste generation and improve the preparation Problems such as process cost, to achieve the effect of easy preparation, easy di- or tricarboxylic acid ester
Active Publication Date: 2020-08-11
赢创奥克森诺有限责任两合公司
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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
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[0084] The following examples illustrate the invention.
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Abstract
The present invention relates to a process for the preparation of di- or tricarboxylic acid esters by alkoxycarbonylation of dienes having conjugated double bonds. In particular, the invention relates to a process comprising the following process steps: a) prefeeding a diene with two conjugated double bonds; b) adding a phosphine ligand and a catalyst precursor selected from the group consisting of palladium dichloride, Palladium dibromide, palladium diiodide, palladium(II) acetylacetonate, palladium(II) acetate, bis(dibenzylideneacetone)palladium, bis(acetonitrile)palladium(II) dichloride, (cinnamyl) dichloride palladium chloride; c) addition of alcohol; d) input of CO; e) heating of the reaction mixture wherein the diene is converted to di- or tricarboxylate.
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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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 赢创奥克森诺有限责任两合公司
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