WO1996038400A1 - Method for preparing a meta-dihydroxylated aromatic compound - Google Patents
Method for preparing a meta-dihydroxylated aromatic compound Download PDFInfo
- Publication number
- WO1996038400A1 WO1996038400A1 PCT/FR1996/000814 FR9600814W WO9638400A1 WO 1996038400 A1 WO1996038400 A1 WO 1996038400A1 FR 9600814 W FR9600814 W FR 9600814W WO 9638400 A1 WO9638400 A1 WO 9638400A1
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- WO
- WIPO (PCT)
- Prior art keywords
- acid
- copper
- compound
- formula
- aromatic
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/50—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by reactions decreasing the number of carbon atoms
- C07C37/56—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by reactions decreasing the number of carbon atoms by replacing a carboxyl or aldehyde group by a hydroxy group
Definitions
- the subject of the present invention is a process for the preparation of a meta-dihydroxy aromatic compound.
- the invention relates more particularly to the preparation of resorcinol or 1, 3-diphenol.
- the invention also relates to the preparation of a meta-dihydroxylated aromatic acid as an intermediate product.
- Another access route to resorcin is a hydroperoxidation process for m-diisopropylbenzene.
- the process comprises two stages: an air oxidation of the m-diisopropylbenzene to the corresponding dihydroperoxide then a separation of the m-diisopropylbenzene from the oxidation products and the excess of m-diisopropylbenzene is recycled.
- This process co-produces acetone in large quantities and the economic interest of the process is based on the market demand for acetone. Furthermore, it should be noted the presence of products secondary to oxidation.
- the present invention provides a new method for overcoming the aforementioned drawbacks.
- a process for the preparation of a meta-dihydroxylated aromatic compound characterized in that it consists in subjecting an aromatic compound carrying at least a carboxylic and / or carboxylate group and, on either side, in the ortho position, a hydroxyl group and a hydrogen atom, at a hydroxylation and decarboxylation stage; said steps being able to take place successively or simultaneously.
- the two steps are carried out successively.
- the method of the invention consists in preparing a meta-dihydroxylated aromatic acid, by hydroxylation of an aromatic compound carrying at least one carboxylate group and of a hydroxyl group in the ortho position, then in carrying out the decarboxylation of the compound obtained thus leading to a meta-dihydroxy aromatic compound.
- the hydroxylation and the decarboxylation are carried out simultaneously starting from an aromatic compound carrying at least one carboxylic group in acid form and from a hydroxyl group in the ortho position.
- the starting substrate involved in the process of the invention is any aromatic compound in which the aromatic nucleus carries at least one carboxylic and / or carboxylate group and having, on either side, in the ortho position, a hydroxyl group and a hydrogen atom.
- aromatic compound means the classic notion of aromaticity as defined in the literature, in particular by Jerry MARCH, Advanced Organic Chemistry, 4 th edition, John
- - Z represents one or more substituents, identical or different
- - Y represents a hydrogen atom, a metal cation or the rest of a base
- - n is a number less than or equal to 3
- the ortho position of the COOY group is a hydrogen atom.
- the compounds of formula (I) are of salicylic type.
- the benzene ring can carry one or more substituents on the aromatic ring.
- Z substituents are given below, but this list is not limiting. Any substituent can be present on the cycle as long as it does not interfere with the desired product.
- Y it is preferably a hydrogen atom.
- the COOY group is designated "carboxylic group”.
- COOY group is then called "carboxylate group" when Y represents a metallic cation in particular of the group la, Ma or Ib of the periodic table of the elements, an ammonium radical or a primary, secondary or tertiary amino group.
- Y preferably represents a metal from group la of the periodic table, namely an alkali metal and, preferably, sodium and potassium; a metal of group IIa, that is to say an alkaline earth metal and more particularly, magnesium, calcium or barium; a group Ib metal, copper.
- - n is a number less than or equal to 3, preferably equal to 0, 1 or 2,
- - Y represents a hydrogen atom, sodium or potassium
- radical (s) Z represent one of the following atoms or groups:
- an alkyl radical linear or branched, having from 1 to 6 carbon atoms, preferably from 1 to 4 carbon atoms, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl,.
- a linear or branched alkoxy radical having from 1 to 6 carbon atoms, preferably from 1 to 4 carbon atoms such as the methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy, tert-butoxy radicals,
- a halogen atom preferably a fluorine, chlorine or bromine atom,. a trifluoromethyl radical.
- the process of the invention applies more particularly to aromatic compounds of formula (I) in which n is equal to 0 or 1, the group Z represents an alkyl or alkoxy radical having from 1 to 4 carbon atoms.
- the aromatic compound preferably chosen is salicylic acid.
- the hydroxylation of the aromatic compound of formula (I) is carried out in acid form or in salified form.
- a first embodiment of the invention consists in reacting said compound with an oxidant which is a copper compound.
- Another embodiment of the invention is to bring said compound of formula (I) into contact with molecular oxygen or a gas containing it, in the presence of an effective amount of copper and / or of a compound copper.
- the copper and / or the copper compound is used in catalytic amounts.
- Copper compounds are known products. These are generally all the organic or inorganic compounds of copper I or copper II, but the copper II compounds are chosen when they are used, alone, as oxidants.
- copper compound cuprous bromide, cupric bromide, cuprous iodide, cuprous chloride, cupric chloride, basic copper carbonate II, cuprous nitrate, cupric nitrate, cuprous sulfate, cupric sulfate, cuprous sulfite, cuprous oxide, cupric hydroxide, cuprous acetate, cupric acetate, cupric trifluoromethylsulfonate, copper salicylate I, copper salicylate II, p- copper hydroxybenzoate I, copper p-hydroxybenzoate II, copper benzoate I, copper benzoate II, copper methylate I, copper methylate II, chloro-copper methylate
- a mixture of copper compounds can be used.
- acetates, salicylates, copper benzoates and cupric chloride are preferred.
- the amount of copper compound used in the process of the invention can vary widely, depending on the variant used.
- the compound to copper / compound molar ratio of formula (I) is from 100% to 500% and, preferably, around 200%.
- the molar ratio of catalyst to copper / compound of formula (I) is from 0.01% to 10% and preferably from 2% to 5%.
- the hydroxylation reaction can be carried out in an aqueous medium or in an organic medium.
- the solvent used must at least partially but preferably completely dissolve the starting substrate.
- solvents which are entirely suitable for the present invention are given below: water,
- - monalcohols or diols preferably aliphatic or arylaliphatic and more preferably, methanol, ethanol, propanol, isopropanol, butanol, ⁇ -phenylethyl alcohol, ethylene glycol, diethylene glycol, propylene glycol , glycerol;
- Aliphatic carboxylic acids preferably acetic acid, propionic acid, butyric acid, isobutyric acid, pentanoic acid, 2-methylbutanoic acid, benzoic acid.
- - aliphatic, cycloaliphatic or aromatic ketones preferably, acetone, methyl ethyl ketone, methylisobutyl ketone, - alkyl or arylalkyl esters of carboxylic, aliphatic, cycloaliphatic or aromatic acids, and more preferably, acetate d ethyl, butyl acetate, benzyl salicylate, methyl laurate, methyl benzoate, ethyl citrate,
- - Aliphatic or aromatic halogenated hydrocarbons and one can mention more particularly, perchlorinated hydrocarbons such as in particular tetrachlorethylene, Thexachloroethane; partially chlorinated hydrocarbons such as dichloromethane, chloroform, 1,2-dichloroethane, 1, 1, 1-trichloroethane, 1, 1, 2,2-tetrachloroethane, pentachloroethane, trichlorethylene, 1-chlorobutane, 1,2-dichlorobutane; monochlorobenzene, 1,2-dichlorobenzene, 1,3-dichlorobenzene, 1,4-dichlorobenzene, 1,2,4-trichlorobenzene or mixtures of different chlorobenzenes; bromoform, bromoethane or 1,2-dibromoethane; monobromobenzene or mixtures of monobromobenzene with one or more dibromobenzenes;
- a carboxylic acid is advantageously chosen, preferably acetic acid and / or water.
- concentration by weight of the aromatic compound of formula (I) in the medium is usually between 5% and 30%.
- the reaction is carried out in the presence of molecular oxygen or of a gas containing it.
- This gas can be pure oxygen or oxygen diluted with an inert gas, for example nitrogen or a rare gas, preferably argon. We can therefore use air.
- the amount of oxygen to be used is adapted as a function of the amount of the compound of formula (I), the speed of the reaction and the amount of committed copper catalyst.
- the molar ratio between the oxygen to be consumed and the compound of formula (I) is preferably at least 0.5 but is advantageously chosen between 0.5 and 5.0.
- the operation is carried out at atmospheric pressure, by bubbling oxygen through the reaction medium, but it is also possible, if necessary, to operate under pressure, preferably between 1 and 20 bar.
- the preferred embodiments of the invention consist in carrying out the process of the invention under a stream of air or in bubbling oxygen.
- the mixture is then stirred at the desired temperature until consumption of an amount of oxygen corresponding to that necessary to fix a hydroxyl group.
- the reaction temperature to be adopted varies according to the thermal stability of the products to be prepared.
- reaction is carried out in a temperature range from 100 ° C to 200 ° C, preferably from 100 ° C to 180 ° C.
- a meta-dihydroxylated aromatic acid is obtained if one starts from a substrate in salified form, that is to say an aromatic compound carrying at least one hydroxyl group and one carboxylate group.
- the OH group which is added to the benzene nucleus is not always found in the OH form. It can also be in esterified form OR which can result from its reaction either with the starting aromatic compound (I) or from the reaction with the copper compound in the case where the latter is used in the form of a carboxylic ligand .
- the ester function if existing, is hydrolyzed during the next decarboxylation step and we arrive at compound (II).
- the hydroxylation step is therefore followed by a step in which a decarboxylation reaction is then carried out.
- the resulting medium is acidified by adding a protonic acid of mineral origin, preferably hydrochloric acid or sulfuric acid or an organic acid such as, for example, acetic acid, trifluromethanesulfonic acid or methanesulfonic acid until a pH less than or equal to 5 is obtained.
- a protonic acid of mineral origin preferably hydrochloric acid or sulfuric acid or an organic acid such as, for example, acetic acid, trifluromethanesulfonic acid or methanesulfonic acid
- the reaction medium is heated to a temperature varying for example between 100 ° C and 220 ° C and, preferably, from 100 ° C to 180 ° C.
- the process is preferably carried out under the autogenous pressure of the reactants.
- reaction medium is cooled to between 20 ° C and 80 ° C.
- An essentially homogeneous medium is obtained consisting of an organic or aqueous phase comprising on the one hand, optionally the starting substrate of formula (I) and on the other hand, the aromatic meta-dihydroxylated compound obtained, preferably corresponding to the formula (III):
- Z and n have the meaning given above.
- the starting substrate of formula (I) is separated by extraction at a controlled pH in an organic solvent which can be chosen from those which have been mentioned above.
- the pH is brought to between 6 and 8 by adding a base, preferably sodium hydroxide, carbonate or sodium bicarbonate.
- a base preferably sodium hydroxide, carbonate or sodium bicarbonate.
- An aqueous phase is obtained comprising the compound of formula (I) in salified form and an organic phase comprising the aromatic meta-dihydroxylated compound preferably corresponding to formula (III).
- the organic and aqueous phases are separated and the aromatic meta-dihydroxylated compound is recovered from the organic phase, according to conventional separation techniques, preferably by distillation or by crystallization.
- the process of the invention is particularly well suited for the preparation of resorcinol from salicylic acid.
- the reaction mixture is brought to reflux for 30 hours.
- reaction medium is then cooled and assayed by high performance liquid chromatography and by gas chromatography.
- reaction medium After being brought back to atmospheric pressure and cooled, the reaction medium is analyzed by high performance liquid chromatography and by gas chromatography.
- the conversion of salicylic acid is 21%, and the yield of resorcinol 11%.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8531537A JPH10510544A (en) | 1995-05-31 | 1996-05-31 | Method for producing meta-dihydroxylated aromatic compound |
EP96920871A EP0773917A1 (en) | 1995-05-31 | 1996-05-31 | Method for preparing a meta-dihydroxylated aromatic compound |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9506449A FR2735468B1 (en) | 1995-05-31 | 1995-05-31 | PROCESS FOR THE PREPARATION OF A DI- OR POLYHYDROXYL AROMATIC COMPOUND |
FR95/06449 | 1995-05-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996038400A1 true WO1996038400A1 (en) | 1996-12-05 |
Family
ID=9479537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1996/000814 WO1996038400A1 (en) | 1995-05-31 | 1996-05-31 | Method for preparing a meta-dihydroxylated aromatic compound |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0773917A1 (en) |
JP (1) | JPH10510544A (en) |
FR (1) | FR2735468B1 (en) |
WO (1) | WO1996038400A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112645799A (en) * | 2020-12-09 | 2021-04-13 | 山东兴强化工产业技术研究院有限公司 | Resorcinol post-treatment process |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023090298A1 (en) * | 2021-11-16 | 2023-05-25 | 住友ベークライト株式会社 | Cyclic compound and method for producing cyclic compound |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2727926A (en) * | 1954-01-08 | 1955-12-20 | Dow Chemical Co | Catalytic oxidation of armoatic carboxylic acids to phenols |
DE3224156A1 (en) * | 1982-06-29 | 1983-12-29 | Bayer Ag, 5090 Leverkusen | Process for the preparation of aromatic meta-dihydroxy compounds |
-
1995
- 1995-05-31 FR FR9506449A patent/FR2735468B1/en not_active Expired - Fee Related
-
1996
- 1996-05-31 WO PCT/FR1996/000814 patent/WO1996038400A1/en not_active Application Discontinuation
- 1996-05-31 EP EP96920871A patent/EP0773917A1/en not_active Withdrawn
- 1996-05-31 JP JP8531537A patent/JPH10510544A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2727926A (en) * | 1954-01-08 | 1955-12-20 | Dow Chemical Co | Catalytic oxidation of armoatic carboxylic acids to phenols |
DE3224156A1 (en) * | 1982-06-29 | 1983-12-29 | Bayer Ag, 5090 Leverkusen | Process for the preparation of aromatic meta-dihydroxy compounds |
Non-Patent Citations (1)
Title |
---|
W.W. KAEDING: "Oxidation of aromatic compounds", JOURNAL OF ORGANIC CHEMISTRY, vol. 26, no. 9, 12 September 1961 (1961-09-12), WASHINGTON, DC, US, pages 3144 - 3148, XP002014502 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112645799A (en) * | 2020-12-09 | 2021-04-13 | 山东兴强化工产业技术研究院有限公司 | Resorcinol post-treatment process |
Also Published As
Publication number | Publication date |
---|---|
JPH10510544A (en) | 1998-10-13 |
FR2735468A1 (en) | 1996-12-20 |
EP0773917A1 (en) | 1997-05-21 |
FR2735468B1 (en) | 1997-07-18 |
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