EP4612158A1 - Methoxypyridylliganden und deren einsatz in der alkoxycarbonylierung - Google Patents
Methoxypyridylliganden und deren einsatz in der alkoxycarbonylierungInfo
- Publication number
- EP4612158A1 EP4612158A1 EP23798922.3A EP23798922A EP4612158A1 EP 4612158 A1 EP4612158 A1 EP 4612158A1 EP 23798922 A EP23798922 A EP 23798922A EP 4612158 A1 EP4612158 A1 EP 4612158A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compound
- palladium
- process according
- stands
- ethylenically unsaturated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/547—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
- C07F9/553—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having one nitrogen atom as the only ring hetero atom
- C07F9/576—Six-membered rings
- C07F9/58—Pyridine rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/36—Preparation of carboxylic acid esters by reaction with carbon monoxide or formates
- C07C67/38—Preparation of carboxylic acid esters by reaction with carbon monoxide or formates by addition to an unsaturated carbon-to-carbon bond
Definitions
- Alkoxycarbonylation is the reaction of ethylenically unsaturated compounds (olefins) with carbon monoxide and alcohols in the presence of a metal-ligand complex to form the corresponding esters. Palladium is usually used as the metal.
- the following scheme shows the general reaction equation for an alkoxycarbonylation:
- the technical object of the invention is to provide a new ligand/process with which the conversion can be increased.
- one of the two radicals R 1 , R 2 stands for -O-CHs, and the other radical stands for -H.
- the compound has the structure (1):
- Process comprising the process steps: a) initial charge of an ethylenically unsaturated compound; b) addition of a previously described compound according to formula (I); c) addition of a Pd compound; d) addition of a co-catalyst selected from: aluminum triflate, H2SO4, MSA, pTSA, TFA; e) addition of an alcohol; f) supply of CO; g) heating the reaction mixture from a) to f), whereby the ethylenically unsaturated compound is converted to an ester.
- the substances can be added in any order. However, CO is usually added after the reactants have been introduced in steps a) to e). In addition, CO can also be added in several steps, so that, for example, part of the CO is added first, then heated and then another part of CO is added.
- the Pd compound is selected from: palladium dichloride, palladium(II) acetylacetonate, palladium(II) acetate, dichloro(1,5-cyclooctadiene)palladium(II), bis(dibenzylideneacetone)palladium, bis(acetonitrile)dichloropalladium(II),
- the Pd compound is Pd(acac)2.
- the alcohol in process step e) is selected from: methanol, ethanol, 1-propanol, 1-butanol, 1-pentanol, 1-hexanol, 2-propanol, tert-butanol, 3-pentanol, cyclohexanol, phenol, or mixtures thereof.
- the alcohol in process step e) is methanol.
- the alcohol is used in excess in process step e).
- the alcohol is simultaneously used as a solvent in process step e).
- CO is added in process step f) at a CO partial pressure in the range of 1 to 5 MPa (10 to 50 bar).
- CO is added in process step f) at a CO partial pressure in the range of 1 to 5 MPa (10 to 40 bar).
- reaction mixture in process step g) is heated to a temperature in the range of 40 °C to 140 °C. In a variant of the process, the reaction mixture in process step g) is heated to a temperature in the range of 80 °C to 140 °C.
- di-iso-butene is used as the ethylenically unsaturated compound.
- TMP1 2,4,4-trimethylpent-1-ene
- TMP2 2,4,4-trimethylpent-2-ene
- the co-catalyst is aluminum triflate.
- reaction is carried out under an argon atmosphere.
- Reaction vessels have previously been dried under the influence of temperature (80 °C) and oil pump vacuum.
- Liquid substances are degassed for at least 15 minutes by bubbling in argon.
- Aluminium trifluoromethanesulfonic acid (AI(OTf)s) is used as the acid.
- the ligands used are (1), (2) and the comparison ligand (3), (4).
- Palladium(II)bis(acetylacetonate) (Pd(acac)2) is used as the precursor.
- Pd(acac)2 (10 mg, 33 pmol) is weighed into a 20 mL vial, sealed hermetically with a crimped septum and dissolved in methanol (10 mL).
- the reaction is carried out in 20 mL glass vessels with magnetic stirrers. First, Al(OTf)s (0.8 mol%) and the ligand (0.2 mol%) are weighed into the glass vessel and then sealed hermetically using a flanged septum. An argon atmosphere is guaranteed in the following steps using a pierced cannula connected to an argon distribution station and at the same time there is the possibility of pressure equalization (adding solutions). The required amount of precursor stock solution (1.5 mL) is added using a pL syringe so that a weight of Pd(acac)2 (0.05 mol%) is obtained.
- methanol is added using a pL syringe so that a total volume of 8.4 mL is obtained.
- the autoclave is closed, flushed three times with nitrogen and checked for density using 20 bar nitrogen. After determining the density, the same procedure with CO.
- the reaction solutions are then heated to the required temperature of 120 °C. After 20 minutes at constant temperature, the substrate is transferred to the reaction vessels using an HPLC pump. After 15 minutes, a sample is taken from each of the substrate lines.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22205593 | 2022-11-04 | ||
| PCT/EP2023/080109 WO2024094568A1 (de) | 2022-11-04 | 2023-10-27 | Methoxypyridylliganden und deren einsatz in der alkoxycarbonylierung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4612158A1 true EP4612158A1 (de) | 2025-09-10 |
Family
ID=84245916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23798922.3A Withdrawn EP4612158A1 (de) | 2022-11-04 | 2023-10-27 | Methoxypyridylliganden und deren einsatz in der alkoxycarbonylierung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4612158A1 (de) |
| CN (1) | CN120152983A (de) |
| WO (1) | WO2024094568A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025237424A1 (zh) * | 2024-05-17 | 2025-11-20 | 中国科学院上海有机化学研究所 | 一种长碳烯烃氢酯化合成长碳脂肪酸酯的方法 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3441384B1 (de) * | 2017-08-08 | 2019-12-25 | Evonik Operations GmbH | Methoxycarbonylierung mit ameisensäure und methanol |
-
2023
- 2023-10-27 CN CN202380076651.6A patent/CN120152983A/zh active Pending
- 2023-10-27 WO PCT/EP2023/080109 patent/WO2024094568A1/de not_active Ceased
- 2023-10-27 EP EP23798922.3A patent/EP4612158A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| CN120152983A (zh) | 2025-06-13 |
| WO2024094568A1 (de) | 2024-05-10 |
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