GB1490350A - Manufacture of hydroxynaphthaldehydes - Google Patents

Manufacture of hydroxynaphthaldehydes

Info

Publication number
GB1490350A
GB1490350A GB2483874A GB2483874A GB1490350A GB 1490350 A GB1490350 A GB 1490350A GB 2483874 A GB2483874 A GB 2483874A GB 2483874 A GB2483874 A GB 2483874A GB 1490350 A GB1490350 A GB 1490350A
Authority
GB
United Kingdom
Prior art keywords
hydroxynaphthaldehydes
aqueous phase
phase transfer
formula
phase
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
GB2483874A
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB2483874A priority Critical patent/GB1490350A/en
Publication of GB1490350A publication Critical patent/GB1490350A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/008—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reaction with tri- or tetrahalomethyl compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

1490350 2-Hydroxynaphthaldehydes IMPERIAL CHEMICAL INDUSTRIES Ltd 30 April 1975 [5 June 1974] 24838/74 Heading C2C 2-Hydroxynaphthaldehydes are prepared by reacting chloroform with an aqueous solution of a 2-naphthol alkali metal salt solution in the presence of a phase transfer catalyst. The phase transfer catalyst is a substance which transfers a reactant from aqueous phase to non-aqueous phase where it undergoes reaction thus releasing the catalyst back into the aqueous phase, preferred phase transfer catalysts are quaternary ammonium salts of the formula where R 1 , R 2 , R 3 and R 4 are each alkyl, aralkyl, and cycloalkyl, or two together may form a ring with 5 to 7 carbon atoms and X is halogen, bisulphate or hydroxyl, and the equivalent quaternary phosphonium salts. The 2-naphthol starting material preferably has the formula wherein R 1 and R 3 are hydrogen atoms or sulphonic acid groups, and R 3 is a carboxyl or sulphonic acid group or hydrogen.
GB2483874A 1975-04-30 1975-04-30 Manufacture of hydroxynaphthaldehydes Expired GB1490350A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2483874A GB1490350A (en) 1975-04-30 1975-04-30 Manufacture of hydroxynaphthaldehydes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2483874A GB1490350A (en) 1975-04-30 1975-04-30 Manufacture of hydroxynaphthaldehydes

Publications (1)

Publication Number Publication Date
GB1490350A true GB1490350A (en) 1977-11-02

Family

ID=10218041

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2483874A Expired GB1490350A (en) 1975-04-30 1975-04-30 Manufacture of hydroxynaphthaldehydes

Country Status (1)

Country Link
GB (1) GB1490350A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5841834A (en) * 1981-09-07 1983-03-11 Sumitomo Chem Co Ltd Preparation of hydroxybenzaldehyde

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5841834A (en) * 1981-09-07 1983-03-11 Sumitomo Chem Co Ltd Preparation of hydroxybenzaldehyde
EP0074272A1 (en) * 1981-09-07 1983-03-16 Sumitomo Chemical Company, Limited Process for the preparation of hydroxybenzaldehydes

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee