EP1697317A1 - Verfahren zur herstellung von vitamin a- acetat - Google Patents

Verfahren zur herstellung von vitamin a- acetat

Info

Publication number
EP1697317A1
EP1697317A1 EP04803835A EP04803835A EP1697317A1 EP 1697317 A1 EP1697317 A1 EP 1697317A1 EP 04803835 A EP04803835 A EP 04803835A EP 04803835 A EP04803835 A EP 04803835A EP 1697317 A1 EP1697317 A1 EP 1697317A1
Authority
EP
European Patent Office
Prior art keywords
salt
weight
formula
synthesis
acetate
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Withdrawn
Application number
EP04803835A
Other languages
German (de)
English (en)
French (fr)
Inventor
Kai Michael Exner
Klemens Massonne
Harald Laas
Detlev Glas
Laszlo Szarvas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Publication of EP1697317A1 publication Critical patent/EP1697317A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C403/00—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone
    • C07C403/06—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone having side-chains substituted by singly-bound oxygen atoms
    • C07C403/12—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone having side-chains substituted by singly-bound oxygen atoms by esterified hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2601/00—Systems containing only non-condensed rings
    • C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
    • C07C2601/16—Systems containing only non-condensed rings with a six-membered ring the ring being unsaturated

Definitions

  • the present invention relates to a process for the preparation of vitamin A acetate (VAA) by reacting? -Vinyl-lonol with triphenylphosphine in the presence of sulfuric acid to yS-lonylidenethyltriphenylphosphonium salts (C15 salt) and subsequent Wittig reaction with 4-acetoxy -2-methyl-but-2-en-al (C5 acetate).
  • VAA vitamin A acetate
  • Vitamin A acetate is an important industrial product that is widely used in the pharmaceutical and cosmetic sectors, as well as in food and nutritional supplements and as a feed additive in animal nutrition.
  • DE-A 2729974 describes a technical synthesis of C15 salt starting from jff-vinyl-ionol by reaction with triphenylphosphine in the presence of sulfuric acid.
  • Lower aliphatic alcohols, in particular methanol, are described as solvents.
  • DE-A 1279677 discloses a continuous process for carrying out the Wittig reaction of C15 salt with C5 acetate in methanolic solution at temperatures below 5 ° C.
  • DE-A 2636879 describes a reaction in two-phase systems consisting of water and halogenated organic solvents at temperatures from 0 to 60 ° C.
  • DE-A 2733231 describes an embodiment of the Wittig reaction of various C15 salts with C5 acetate in water at temperatures from 0 to about 100 ° C.
  • ammonia is disclosed as the base.
  • the reaction of the C15 salts obtained using sulfuric acid, a hydrogen sulfate or phosphoric acid is particularly advantageously carried out at room temperature.
  • -Vinyl-lonol produced in any way is suitable for producing the C15 salt.
  • -VinylI-lonol is used with a purity of about 90 to about 99%, preferably those with a purity of about 90 to about 95%.
  • triphenylphosphine is suitable for the implementation of the yff vinyl ionol.
  • Triphenylphosphine with a purity of about 95 to about 99.9%, preferably of about 98 to about 99.9%, is advantageously used in the process according to the invention.
  • an approximately equimolar amount of triphenylphosphine preferably from about 0.95 to about 1.05 equivalents, is used. It is often advantageous to use triphenylphosphine in a slight deficit, i.e. in an amount of, based on yff-vinyl-ionol, about 0.95 to about 0.995 equivalents.
  • methanol and water which additionally contain further organic solvents, serve as the dissolving medium in carrying out the C15 synthesis according to the invention.
  • Aqueous methanol is usually used, with an excess of methanol usually being present.
  • Another organic component is added to the solvent mixture, for example a hydrocarbon with 5 to 8 carbon atoms, which can be aliphatic, cyclic or aromatic, such as e.g.
  • methanol which already contains the hydrocarbons as an impurity.
  • alkanes such as heptane, cyclohexane, octane, isooctane or mixtures thereof has proven to be particularly advantageous. It has been shown that the course of the reaction depends on the composition of the dissolving medium. Good results are generally achieved using ternary solvent mixtures which consist of methanol, water and heptane, the heptane used also being able to contain up to about 40% by weight of further hydrocarbons with about 5 to about 8 carbon atoms.
  • solvent mixtures which consist of about 64 to 72% by weight of methanol and about 14 to 18% by weight.
  • Water and about 14 to 18 wt .-% of heptane which can contain up to 40 wt.% Of other hydrocarbons.
  • solvent mixtures which consist of about 66.5% by weight of methanol, about 16.5% by weight of water and about 17% by weight of heptane, with heptane in the mixture instead of heptane can be used with other hydrocarbons as mentioned above.
  • concentration of the reagents in the selected solvent mixture can in principle be varied over a wide range. Taking into account the economic aspect, however, it is advantageous not to work with excessive dilution. Concentrations based on the amount of the total reaction mixture of about 16 to about 24% by weight, preferably about 18 to about 22% by weight? -Vinyl-ionol and about 18 to about 26% by weight, have been found to be expedient about 20 to about 24 weight percent triphenylphosphine.
  • the solvent mixtures used are separated off from the reaction products and preferably recycled, for example in the course of a further reaction according to the invention of yff-vinyl-ionol with triphenylphosphine to give the C15 salt.
  • Changes in the composition of the solvent mixture caused thereby can be compensated for by adding additional amounts of the respective components.
  • Changes in the composition of the alkane component for example due to the enrichment or depletion of individual hydrocarbons, are not critical as long as they do not appreciably affect the course of the reaction.
  • the reaction of ⁇ -vinyl ionol with triphenylphosphine to form the C15 salt is carried out in the presence of sulfuric acid.
  • concentration of sulfuric acid can be varied over a wide range and is usually about 50 to about 96% by weight.
  • Sulfuric acid is preferably used at a concentration of about 60 to about 90% by weight, particularly preferably from about 70 to about 80% by weight.
  • About 73 to about 77% by weight sulfuric acid is very particularly preferably used. It is expressed in an approximately equimolar amount, based on the jff vinyl alcohol to be reacted, i.e. used in an amount of about 0.9 to about 1.1 equivalents. It is advantageous to use a slight excess of sulfuric acid, i.e. about 1.01 to about 1.1 equivalents.
  • triphenylphosphine is generally introduced in the selected solvent mixture and the necessary amount of sulfuric acid is added at from about 30 to about 50.degree.
  • the sulfuric acid is advantageously added in portions or continuously over a longer period of time (about 1 to about 10 h).
  • the selected amount of jff-vinyl-ionol is added and a temperature of about 45 to about 55 ° C. is advantageously set.
  • the reaction is usually complete after about 2 to about 20 hours.
  • the reaction mixture obtained can be worked up in a manner known per se to the person skilled in the art.
  • preferred reaction products contain as little as possible, for example about 0.1 to about 15 mol% of the methyl sulfate.
  • C15 salt, which contains only about 0.1 to about 5 mol% of the methyl sulfate, is particularly preferred, especially in the context of the further reaction according to the invention to give vitamin A acetate.
  • the C15 salt obtained is converted into vitamin A acetate by reaction with the aldehyde of the formula IV (4-acetoxy-2-methyl-but-2-en-al) referred to as C5 acetate.
  • the C5 acetate there are no special requirements for the C5 acetate to be used. As a rule, it is obtained in a purity that is usually expected from chemical intermediates, i.e. a purity of about 90 to about 99%.
  • the reaction with the C15 salt obtained according to the invention is carried out in water or aqueous solvent mixtures which can contain, for example, alcohols having 1 to 4 carbon atoms, such as methanol, ethanol, propanol or isopropanol.
  • the reaction is preferably carried out in water.
  • a solution or a mixture of the C15 salt in the chosen solvent medium is advantageously placed at about 45 to about 55 ° C, preferably at about 48 to about 52 ° C, and a suitable base such as e.g. Sodium hydroxide solution, potassium hydroxide solution, alkali or alkaline earth hydroxides, alkaline earth oxides such as MgO or BaO, sodium carbonate, potassium carbonate or other basic carbonates, alcoholates or amines such as e.g. Triethylamine or mixtures of the compounds mentioned.
  • a suitable base such as e.g. Sodium hydroxide solution, potassium hydroxide solution, alkali or alkaline earth hydroxides, alkaline earth oxides such as MgO or BaO, sodium carbonate, potassium carbonate or other basic carbonates, alcoholates or amines such as e.g. Triethylamine or mixtures of the compounds mentioned.
  • a base which is preferred in the process according to the invention is ammonia, which is advantageously used in an amount of about 2 to about 2.3 equivalents, based on the amount of C15 salt to be reacted.
  • Ammonia is particularly preferably used in an amount of from 2.1 to about 2.2 equivalents.
  • the selected amount of ammonia can be introduced into the reaction mixture or the reaction solution in various forms.
  • gaseous or liquid ammonia can be introduced into the reaction mixture or evaporated or dripped onto its surface.
  • Ammonia is preferably added in the form of aqueous solutions, which can contain, for example, about 5 to about 20% by weight of ammonia. Preferred solutions contain about 9 to about 15 weight percent ammonia.
  • a molar amount approximately equal to the amount of C15 salt to be reacted, ie about 0.9 to about 1.1 equivalents, of C5 acetate is added to the reaction mixture.
  • the reagents are advantageously added in portions or continuously.
  • reaction mixture can be stirred in the specified temperature range or, if appropriate, also at lower or higher temperatures.
  • the reaction mixture can be worked up by methods known per se to the person skilled in the art, for example extractively.
  • the method according to the invention is suitable for reactions on any scale. It can be carried out batchwise, semi-continuously or fully continuously with good success.
  • the special efficiency of the process is particularly important for implementations on a technical scale.
  • the semi-continuous or fully continuous design of the process steps offers clear advantages in terms of process technology as well as economically.
  • all of the time data influenced thereby are understood, e.g. Response times, dosing times and the like as average times.
  • 0.98 equivalents of triphenylphosphine are accordingly in a solvent mixture consisting of 66.5% by weight of methanol, 16.5% by weight of water and 17% by weight of heptane in a concentration of 32% by weight .-% submitted at 40 ° C with stirring and 1, 02 equivalents of about 75 wt .-% sulfuric acid added dropwise within about 1 h.
  • 1.0 equivalents of? -Vinyl-ionol are added at about 50 ° C. and stirring is continued at about 50 ° C. until the reaction is complete.
  • the work-up and isolation of the C15 salt obtained as a reaction product can be carried out in a manner known per se in the art.
  • triphenylphosphine 139.7 g of triphenylphosphine were placed in a solvent mixture consisting of 206.8 g of methanol, 44.46 g of water and 40.68 g of heptane at 40 ° C. with stirring. 72.7 g of 75% sulfuric acid were added dropwise within 1 h. Subsequently, 130 g of? -Vinyl-lonol with a purity of 92.1% were metered in over the course of 2 h, the temperature was raised to 50 ° C. and the mixture was stirred for 4 h. After extractive work-up, C15 salt was obtained in a yield of 99.9% (based on triphenylphosphine used).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP04803835A 2003-12-17 2004-12-14 Verfahren zur herstellung von vitamin a- acetat Withdrawn EP1697317A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10359433A DE10359433A1 (de) 2003-12-17 2003-12-17 Verfahren zur Herstellung von Vitamin A-Acetat
PCT/EP2004/014209 WO2005058811A1 (de) 2003-12-17 2004-12-14 Verfahren zur herstellung von vitamin a- acetat

Publications (1)

Publication Number Publication Date
EP1697317A1 true EP1697317A1 (de) 2006-09-06

Family

ID=34683506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04803835A Withdrawn EP1697317A1 (de) 2003-12-17 2004-12-14 Verfahren zur herstellung von vitamin a- acetat

Country Status (7)

Country Link
US (2) US20070082950A1 (zh)
EP (1) EP1697317A1 (zh)
JP (1) JP2007514681A (zh)
CN (1) CN100455558C (zh)
CA (1) CA2546307A1 (zh)
DE (1) DE10359433A1 (zh)
WO (1) WO2005058811A1 (zh)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2130833A1 (en) 2008-06-05 2009-12-09 DSM IP Assets B.V. Process for the preparation of zeacarotenes
CN103288875A (zh) * 2013-05-24 2013-09-11 广州巨元生化有限公司 一种维生素a磷盐的制备方法
CN109517851B (zh) * 2018-11-29 2021-03-02 厦门金达威维生素有限公司 一种维生素a醋酸酯的合成方法
CN109651150B (zh) * 2018-12-20 2022-02-18 万华化学集团股份有限公司 一种制备维生素a醋酸酯的方法
CN111484524B (zh) * 2019-01-25 2022-04-12 新发药业有限公司 一种维生素a乙酸酯中间体c15及维生素a乙酸酯的制备方法
EP3956305A1 (en) * 2019-04-15 2022-02-23 DSM IP Assets B.V. Novel enol-acetates(ii)
CN113661160A (zh) * 2019-04-15 2021-11-16 帝斯曼知识产权资产管理有限公司 新的烯醇乙酸酯
CN111205209B (zh) * 2020-03-05 2021-12-14 万华化学集团股份有限公司 一种多级连续串联反应萃取制备维生素a醋酸酯的装置及方法
CN112876395B (zh) * 2021-01-15 2023-01-13 万华化学集团股份有限公司 一种维生素a醋酸酯的制备方法
WO2022241669A1 (zh) 2021-05-19 2022-11-24 万华化学集团股份有限公司 一种维生素a醋酸酯的制备方法
WO2022241670A1 (zh) 2021-05-19 2022-11-24 万华化学集团股份有限公司 一种c15膦盐的制备方法
CN113214126B (zh) * 2021-05-19 2023-07-25 万华化学集团股份有限公司 一种维生素a醋酸酯的制备方法
CN113201016B (zh) * 2021-05-19 2023-09-19 万华化学集团股份有限公司 一种c15膦盐的制备方法
CN114031534B (zh) * 2021-11-19 2023-09-19 万华化学集团股份有限公司 一种高稳定性维生素a及其制备方法
CN115057886B (zh) * 2022-06-20 2024-05-03 万华化学集团股份有限公司 一种c15膦盐的制备方法

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US3932485A (en) * 1974-08-28 1976-01-13 Hoffmann-La Roche Inc. Improved preparation of Wittig salt of vinyl β-ionol
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Also Published As

Publication number Publication date
CA2546307A1 (en) 2005-06-30
CN100455558C (zh) 2009-01-28
US20070082950A1 (en) 2007-04-12
WO2005058811A1 (de) 2005-06-30
CN1894208A (zh) 2007-01-10
JP2007514681A (ja) 2007-06-07
US20090043121A1 (en) 2009-02-12
DE10359433A1 (de) 2005-07-21

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