GB399723A - Process for the manufacture of aromatic hydroxy aldehydes - Google Patents

Process for the manufacture of aromatic hydroxy aldehydes

Info

Publication number
GB399723A
GB399723A GB9052/33A GB905233A GB399723A GB 399723 A GB399723 A GB 399723A GB 9052/33 A GB9052/33 A GB 9052/33A GB 905233 A GB905233 A GB 905233A GB 399723 A GB399723 A GB 399723A
Authority
GB
United Kingdom
Prior art keywords
nitrobenzene
sulphonic
prepared
acid
nitroaryl
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
GB9052/33A
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.)
F Hoffmann La Roche AG
Original Assignee
F Hoffmann La Roche AG
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 F Hoffmann La Roche AG filed Critical F Hoffmann La Roche AG
Publication of GB399723A publication Critical patent/GB399723A/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
    • C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
    • C07C45/29—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation of hydroxy groups

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Aromatic oxyaldehydes are prepared by oxidizing phenols containing a carbinol group in o- or p-position with nitroaryl sulphonic and carboxylic acids in alkaline solution. The use of nitroaryl sulphonic and carboxylic acids containing a halogen atom in o-position to the nitro group is excluded. The starting materials may be obtained by condensing phenols with formaldehyde p in alkaline solution. According to the examples, (1) vanillin is prepared from vanillyl alcohol using m-nitrobenzene-sulphonic acid or p-nitrobenzoic acid, (2) vanillin together with 4-hydroxy-3-methoxybenzoyl-carboxylic acid is obtained from guaiacol-trichloromethylcarbinol using a nitrobenzene sulphonation product, (3) phenol is condensed with formaldehyde in sodium hydroxide solution and oxidized with m-nitrobenzene-sulphonic acid to a mixture of salicylaldehyde and p-hydroxybenzaldehyde, (4) 4-hydroxyuvitine-aldehyde is prepared from dimethylol-p-cresol with the aid of m-nitrobenzene-sulphonic acid. Specifications 219,676, [Class 2 (iii), Dyes &c.], and 392,399 are referred to.
GB9052/33A 1932-05-18 1933-03-25 Process for the manufacture of aromatic hydroxy aldehydes Expired GB399723A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE399723X 1932-05-18

Publications (1)

Publication Number Publication Date
GB399723A true GB399723A (en) 1933-10-12

Family

ID=6397511

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9052/33A Expired GB399723A (en) 1932-05-18 1933-03-25 Process for the manufacture of aromatic hydroxy aldehydes

Country Status (1)

Country Link
GB (1) GB399723A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108636423A (en) * 2018-05-17 2018-10-12 云南大学 A kind of preparation method of load type nano gold catalyst and application

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108636423A (en) * 2018-05-17 2018-10-12 云南大学 A kind of preparation method of load type nano gold catalyst and application

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