WO2001072682A1 - Verfahren zur herstellung von carbonsäurebenzylestern - Google Patents
Verfahren zur herstellung von carbonsäurebenzylestern Download PDFInfo
- Publication number
- WO2001072682A1 WO2001072682A1 PCT/EP2001/003141 EP0103141W WO0172682A1 WO 2001072682 A1 WO2001072682 A1 WO 2001072682A1 EP 0103141 W EP0103141 W EP 0103141W WO 0172682 A1 WO0172682 A1 WO 0172682A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- acid
- dibenzyl ether
- carried out
- carboxylic acid
- reaction
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/24—Preparation of carboxylic acid esters by reacting carboxylic acids or derivatives thereof with a carbon-to-oxygen ether bond, e.g. acetal, tetrahydrofuran
Definitions
- the invention relates to a process for the preparation of carboxylic acid benzyl esters from dibenzyl ether.
- Benzyl acetate the main component of jasmine oil, is an important fragrance for the production of fragrance compositions and the starting product for the production of fruit ethers.
- Benzyl acetate has been reported several times. For example, the production of benzyl acetate by reacting benzyl alcohol with acetic acid has been known for a long time.
- Benzyl acetate can also be prepared by reacting benzyl chloride with alkali metal acetates, if appropriate in the presence of phase transfer reagents (Wang et al., Chem. Eng. Com un.
- DD-A5-286 577 describes the preparation of benzyl acetate by reacting dibenzyl ether with acetic anhydride.
- the drastic ones are disadvantageous
- the dibenzyl ether used in the process according to the invention is an unsubstituted or substituted dibenzyl ether which, for example, has one or more substituents from the series of branched or straight-chain C r C 6 alkyl, C r C 6 alkoxy, CN, CO (C r can carry C 6 ) -alkyl, NO 2 or halogen.
- substituents are methyl, methoxy or chlorine.
- An unsubstituted dibenzyl ether is particularly preferably used.
- Dibenzyl ether or dibenzyl ether / benzyl alcohol mixtures such as are obtained, for example, in the production of benzyl alcohol from benzyl chloride, can be used in the process according to the invention.
- Dibenzyl ether / benzyl alcohol mixtures of dibenzyl ether can be, for example, from 50 to 100% by weight, preferably from 60 to 100% by weight, particularly preferably from 70 to 100% by weight.
- the carboxylic acids used in the process according to the invention are straight-chain or branched alkyl, aryl or aralkyl carboxylic acids which are saturated or unsaturated and have 1 to 50 C atoms, preferably 2 to 30 C atoms, particularly preferably 2 to 10 C atoms Contain atoms.
- Lauric acid, myristic acid, stearic acid, oleic acid, acrylic acid, cinnamic acid, phenylacetic acid, benzoic acid or salicylic acid can be used.
- Particularly preferred carboxylic acids are acetic acid and propionic acid.
- the process according to the invention is preferably carried out with removal of the formed
- Water performed The removal of the water by distillation or by passing an inert gas such as nitrogen is suitable.
- Dehydrating agents for example zeolites, aluminum oxides or clays, are preferably used to remove the water formed.
- the water formed is particularly preferably removed by reacting the reaction in the presence of the corresponding anhydride of the carboxylic acid used as dehydrating Funds.
- Very particularly preferred anhydrides are acetic anhydride and propionic anhydride.
- strong inorganic acids such as, for example, sulfuric acid, hydrogen chloride, hydrogen bromide, hydrogen iodide, hydrofluoric acid, perchloric acid or are preferably used as homogeneous acid catalysts
- Phosphoric acid strong organic acids such as trifluoroacetic acid, methanesulfonic acid, ethanesulfonic acid, benzenesulfonic acid, 4-toluenesulfonic acid, chlorosulfonic acid or trifluoromethanesulfonic acid and Lewis acids such as boron trifluoride, aluminum chloride, zinc chloride, tin chloride, titanium chloride or iron chloride.
- Preferred homogeneous acidic catalysts are sulfuric acid, trifluoromethanesulfonic acid, 4-toluenesulfonic acid and boron trifluoride.
- the homogeneous acid catalyst is preferably used in an amount of 10 -5 to 1 equivalents, particularly preferably 10 " 4 to 1 equivalents, very particularly preferably 5 x 10" 4 to 1 equivalents, based on dibenzyl ether.
- the temperature at which the process according to the invention is carried out is preferably 15 to 200 ° C., particularly preferably 25 to 190 ° C., very particularly preferably 30 to 180 ° C.
- the pressure required is then at least equal to the vapor pressure of the reaction mixture. It can be up to about 50 bar, preferably up to 25 bar.
- the process according to the invention is preferably carried out with thorough mixing of the reactants.
- Intensive mixing can be achieved in various ways known to those skilled in the art, for example by stirring, nozzles, baffles, static mixers, pumps, turbulent flows in narrow tubes and by ultrasound.
- the process according to the invention is preferably carried out under a conventional protective gas such as nitrogen, helium or argon.
- the process according to the invention can be carried out batchwise, continuously or partially continuously.
- the process according to the invention gives benzyl carboxylates in good yields with high conversion and good selectivity.
- the method according to the invention can be carried out in a simple manner without high expenditure on equipment.
- the starting materials with the catalyst can be placed in a reaction vessel.
- the reaction preferably takes place with thorough mixing and the presence of inert gas.
- the workup can be carried out by adding a water-immiscible solvent, preferably toluene, to the reaction mixture. After separation of the organic phase, which contains the reaction product, this can be separated by distillation.
- Example 2 was carried out analogously to Example 1. 60.0 g (1.0 mol)
- Example 3 was carried out analogously to Example 1.
- the reaction temperature was 120 ° C.
- the reaction mixture contained benzyl acetate and dibenzyl ether in a ratio of 67 to
- Example 4 was carried out analogously to Example 1. 90.0 g (1.5 mol) of acetic acid and 0.5 g of trifluoromethanesulfonic acid were used. The reaction mixture contained benzyl acetate and dibenzyl ether in a ratio of 52 to
- the reaction mixture contained benzyl acetate and dibenzyl ether in a ratio of 83 to 3.
- Example 6 was carried out analogously to example 5. 15.0 g (0.25 mol)
- the reaction mixture contained benzyl acetate and dibenzyl ether in a ratio of 32 to
- Example 7 was carried out analogously to example 5. 6.0 g (0.1 mol) of acetic acid were used, the reaction time was 3 hours. The reaction mixture contained benzyl acetate and dibenzyl ether in a ratio of 75 to Example 8
- Example 8 was carried out analogously to example 5. 0.1 g of trifluoromethanesulfonic acid was used, the reaction temperature was 25 ° C.
- the reaction mixture contained benzyl acetate and dibenzyl ether in a ratio of 77 to 5.
- Example 9 was carried out analogously to example 5. 0.5 g of boron trifluoride diethyl etherate was used.
- the reaction mixture contained benzyl acetate and dibenzyl ether in a ratio of 74 to
- Example 10 was carried out analogously to example 5. There were 37.0 g (0.5 mol) of propionic acid, 65.1 g (0.5 mol) of propionic anhydride and 0.5 g of conc. Sulfuric acid used, the reaction time was 7 hours.
- the reaction mixture contained benzyl acetate and dibenzyl ether in a ratio of 73 to 15.
- Example 11 was analogous to Example 1 but with a mixture of 79.3 g (0.4 mol)
- the reaction mixture contained benzyl acetate and dibenzyl ether in a ratio of 68 to
- Example 12 was carried out analogously to Example 11 but with 0.5 g of trifluoromethanesulfonic acid.
- the reaction mixture contained benzyl acetate and dibenzyl ether in a ratio of 75 to
- Example 13 was carried out analogously to example 5 but without a catalyst.
- the reaction mixture contained benzyl acetate and dibenzyl ether in a ratio of 1 to 94.
- Example 14 was carried out analogously to example 5.
- the reaction temperature was 110 ° C, the reaction time 4 hours.
- the mixture was neutralized with sodium carbonate, filtered and the reaction mixture was separated by distillation.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/239,718 US6800780B2 (en) | 2000-03-29 | 2001-03-19 | Method for producing carboxylic acid benzyl esters |
JP2001570597A JP2003528843A (ja) | 2000-03-29 | 2001-03-19 | カルボン酸ベンジルエステルの製法 |
AU2001244211A AU2001244211A1 (en) | 2000-03-29 | 2001-03-19 | Method for producing carboxylic acid benzyl esters |
EP01917097A EP1268391A1 (de) | 2000-03-29 | 2001-03-19 | Verfahren zur herstellung von carbonsäurebenzylestern |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10015659A DE10015659A1 (de) | 2000-03-29 | 2000-03-29 | Verfahren zur Herstellung von Carbonsäurebenzylestern |
DE10015659.2 | 2000-03-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001072682A1 true WO2001072682A1 (de) | 2001-10-04 |
Family
ID=7636870
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2001/003141 WO2001072682A1 (de) | 2000-03-29 | 2001-03-19 | Verfahren zur herstellung von carbonsäurebenzylestern |
Country Status (6)
Country | Link |
---|---|
US (1) | US6800780B2 (de) |
EP (1) | EP1268391A1 (de) |
JP (1) | JP2003528843A (de) |
AU (1) | AU2001244211A1 (de) |
DE (1) | DE10015659A1 (de) |
WO (1) | WO2001072682A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1288187A2 (de) * | 2001-08-27 | 2003-03-05 | Bayer Aktiengesellschaft | Verfahren zur Herstellung von Carbonsäurebenzylestern |
EP1357101A1 (de) * | 2002-04-24 | 2003-10-29 | Bayer Aktiengesellschaft | Verfahren zur Herstellung von Benzylalkoholen |
EP1400506A2 (de) * | 2002-09-18 | 2004-03-24 | Bayer Chemicals AG | Verfahren zur Herstellung von Carbonsäurebenzylestern |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10226040A1 (de) * | 2002-06-12 | 2003-12-24 | Bayer Ag | Verfahren zur Herstellung von Carbonsäurebenzylestern |
JP5124260B2 (ja) * | 2007-12-21 | 2013-01-23 | 東京応化工業株式会社 | 化合物の製造方法 |
US11300390B1 (en) | 2018-03-05 | 2022-04-12 | Dynamic Structures And Materials, Llc | Control surface deployment apparatus and method of use |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2197798A (en) * | 1935-09-04 | 1940-04-23 | Jr Henry B Gans | Method of producing esters |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE286577C (de) | ||||
US2030835A (en) | 1934-10-26 | 1936-02-11 | Union Carbide & Carbon Corp | Preparation of esters |
FR1498370A (fr) | 1966-06-06 | 1967-10-20 | Rhone Poulenc Sa | Procédé de production d'esters organiques |
JPS63150245A (ja) | 1986-12-12 | 1988-06-22 | Idemitsu Kosan Co Ltd | カルボン酸エステルの製造方法 |
-
2000
- 2000-03-29 DE DE10015659A patent/DE10015659A1/de not_active Withdrawn
-
2001
- 2001-03-19 WO PCT/EP2001/003141 patent/WO2001072682A1/de not_active Application Discontinuation
- 2001-03-19 US US10/239,718 patent/US6800780B2/en not_active Expired - Fee Related
- 2001-03-19 AU AU2001244211A patent/AU2001244211A1/en not_active Abandoned
- 2001-03-19 EP EP01917097A patent/EP1268391A1/de not_active Withdrawn
- 2001-03-19 JP JP2001570597A patent/JP2003528843A/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2197798A (en) * | 1935-09-04 | 1940-04-23 | Jr Henry B Gans | Method of producing esters |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1288187A2 (de) * | 2001-08-27 | 2003-03-05 | Bayer Aktiengesellschaft | Verfahren zur Herstellung von Carbonsäurebenzylestern |
EP1288187A3 (de) * | 2001-08-27 | 2004-01-14 | Bayer Chemicals AG | Verfahren zur Herstellung von Carbonsäurebenzylestern |
EP1357101A1 (de) * | 2002-04-24 | 2003-10-29 | Bayer Aktiengesellschaft | Verfahren zur Herstellung von Benzylalkoholen |
EP1400506A2 (de) * | 2002-09-18 | 2004-03-24 | Bayer Chemicals AG | Verfahren zur Herstellung von Carbonsäurebenzylestern |
EP1400506A3 (de) * | 2002-09-18 | 2004-04-07 | Bayer Chemicals AG | Verfahren zur Herstellung von Carbonsäurebenzylestern |
Also Published As
Publication number | Publication date |
---|---|
US20030125578A1 (en) | 2003-07-03 |
AU2001244211A1 (en) | 2001-10-08 |
EP1268391A1 (de) | 2003-01-02 |
JP2003528843A (ja) | 2003-09-30 |
DE10015659A1 (de) | 2001-10-04 |
US6800780B2 (en) | 2004-10-05 |
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