GB638196A - Improvements in or relating to the preparation of hydroxy aromatic carboxylic acids - Google Patents

Improvements in or relating to the preparation of hydroxy aromatic carboxylic acids

Info

Publication number
GB638196A
GB638196A GB1269848A GB1269848A GB638196A GB 638196 A GB638196 A GB 638196A GB 1269848 A GB1269848 A GB 1269848A GB 1269848 A GB1269848 A GB 1269848A GB 638196 A GB638196 A GB 638196A
Authority
GB
United Kingdom
Prior art keywords
ketone
hydroxy
water
acid
alkali
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.)
Expired
Application number
GB1269848A
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.)
Ilford Imaging UK Ltd
Original Assignee
Ilford Ltd
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 Ilford Ltd filed Critical Ilford Ltd
Priority to GB1269848A priority Critical patent/GB638196A/en
Publication of GB638196A publication Critical patent/GB638196A/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/15Preparation of carboxylic acids or their salts, halides or anhydrides by reaction of organic compounds with carbon dioxide, e.g. Kolbe-Schmitt synthesis

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Mono-hydroxy mono-carboxylic acids of the benzene and naphthalene series are obtained by the action of carbon dioxide on a dry solution of an alkali metal phenolate or naphtholate in a dialkyl ketone which is liquid at ordinary temperatures and has a boiling point of at least 75 DEG C. Various substituents may be present in the nucleus but at least one of the positions ortho to the hydroxy group is preferably unsubstituted. Methyl isobutyl ketone is the preferred solvent for naphthols and di-isobutyl ketone for phenol itself, these being substantially immiscible with water. The reaction is preferably carried out at least 10 degrees below the boiling point of the ketone, carbon dioxide being passed in and the di-salt of the hydroxy acid being precipitated. This is filtered off and a further portion of alkali and phenol or naphthol added, giving after dehydration a solution which may be again reacted with carbon dioxide. The free hydroxy-acid is liberated from the salt and isolated in various ways. Examples show the preparation of 1-hydroxy-2-naphthoic acid, 2-hydroxy-1-naphthoic acid, salicylic acid and 5-benzyl-salicylic acid. Specifications 384,619, 460,282, 483,795 and 511,393 are referred to. Solutions of alkali phenolates or naphtholates in dialkyl ketones are obtained by mixing a solution of the phenol or naphthol in the ketone with alkali metal, or concentrated aqueous alkali; in the latter case the water is removed by distillation. If the ketone is substantially immiscible with water, e.g. methyl isobutyl ketone, the distillate is separated and the ketone layer returned to the reaction vessel. When using water-soluble ketones such as methyl ethyl ketone, an azeotrope distils and fresh dry ketone must be added to replace that removed.
GB1269848A 1948-05-08 1948-05-08 Improvements in or relating to the preparation of hydroxy aromatic carboxylic acids Expired GB638196A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1269848A GB638196A (en) 1948-05-08 1948-05-08 Improvements in or relating to the preparation of hydroxy aromatic carboxylic acids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1269848A GB638196A (en) 1948-05-08 1948-05-08 Improvements in or relating to the preparation of hydroxy aromatic carboxylic acids

Publications (1)

Publication Number Publication Date
GB638196A true GB638196A (en) 1950-05-31

Family

ID=10009464

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1269848A Expired GB638196A (en) 1948-05-08 1948-05-08 Improvements in or relating to the preparation of hydroxy aromatic carboxylic acids

Country Status (1)

Country Link
GB (1) GB638196A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59186942A (en) * 1983-04-07 1984-10-23 Kawasaki Kasei Chem Ltd Purification of crude 1,4-dihydroxy-2-naphthoic acid or its salt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59186942A (en) * 1983-04-07 1984-10-23 Kawasaki Kasei Chem Ltd Purification of crude 1,4-dihydroxy-2-naphthoic acid or its salt
JPH0468301B2 (en) * 1983-04-07 1992-11-02 Kawasaki Kasei Chemicals

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