GB401562A - Method of making monoalkyl ethers of protocatechuic aldehyde - Google Patents

Method of making monoalkyl ethers of protocatechuic aldehyde

Info

Publication number
GB401562A
GB401562A GB7237/33A GB723733A GB401562A GB 401562 A GB401562 A GB 401562A GB 7237/33 A GB7237/33 A GB 7237/33A GB 723733 A GB723733 A GB 723733A GB 401562 A GB401562 A GB 401562A
Authority
GB
United Kingdom
Prior art keywords
monoalkyl ethers
caustic soda
solution
protocatechuic aldehyde
making
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
GB7237/33A
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.)
Honeywell Riedel de Haen AG
Original Assignee
JD Riedel E de Haen 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 JD Riedel E de Haen AG filed Critical JD Riedel E de Haen AG
Publication of GB401562A publication Critical patent/GB401562A/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

Monoalkyl ethers of protocatechuic aldehyde are prepared by treating pyrocatechol monoalkyl ethers with salts of glyoxylic acid in a basic medium and subjecting the product, preferably without isolating it, to mild oxidation, e.g. with a reducible heavy metal compound or an aromatic nitro compound. According to the example, a solution of glyoxylic acid, obtained by the electrolytic reduction of oxalic acid, is neutralized with caustic soda and allowed to stand for some days with a solution of guaiacol in the equivalent amount of caustic soda; after removal of excess guaiacol by steam distillation, copper sulphate and more caustic soda are added and the mixture heated together; by extraction of the filtered solution with benzene, vanillin is obtained.
GB7237/33A 1932-03-21 1933-03-09 Method of making monoalkyl ethers of protocatechuic aldehyde Expired GB401562A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE401562X 1932-03-21

Publications (1)

Publication Number Publication Date
GB401562A true GB401562A (en) 1933-11-16

Family

ID=6406475

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7237/33A Expired GB401562A (en) 1932-03-21 1933-03-09 Method of making monoalkyl ethers of protocatechuic aldehyde

Country Status (1)

Country Link
GB (1) GB401562A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010007161A1 (en) * 2008-07-18 2010-01-21 Rhodia Operations Method for separating aromatic aldehyde

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010007161A1 (en) * 2008-07-18 2010-01-21 Rhodia Operations Method for separating aromatic aldehyde
FR2933974A1 (en) * 2008-07-18 2010-01-22 Rhodia Operations PROCESS FOR SEPARATING AROMATIC ALDEHYDE
CN102099321A (en) * 2008-07-18 2011-06-15 罗地亚管理公司 Method for separating aromatic aldehyde
US9018421B2 (en) 2008-07-18 2015-04-28 Rhodia Operations Separation of aromatic aldehydes

Similar Documents

Publication Publication Date Title
GB401562A (en) Method of making monoalkyl ethers of protocatechuic aldehyde
DE2944295C2 (en) Process for the preparation of racemic p-hydroxy mandelic acid
Leger et al. Studies on Lignin and Related Compounds. XXXIV. Acetovanillone and Acetosyringone as Degradation Products of Lignin Sulfonic Acids
AT141159B (en) Process for the preparation of trichloromethyloxyarylcarbinols and their corresponding oxyaldehydes.
US2414120A (en) Production of vanillyl alcohol
DE707006C (en) Process for the production of water-soluble condensation products
US2284287A (en) Ethers of protocatechuic aldehyde
DE388795C (en) Process for the preparation of condensation products from phenols and aldehydes
US2035418A (en) Process for stabilizing white oils
DE870268C (en) Process for the production of water-soluble, tanning condensation products
AT132698B (en) Process for breaking down tars or tar oils into pure phenols and neutral oils.
GB323784A (en) Improvements in or relating to the treatment of hydrocarbon oils
AT119115B (en) Process for making a pulp mass.
SU51841A1 (en) The method of cleaning raw wood creosote
DE164883C (en)
SU48321A1 (en) The method of obtaining purified creosote
US1663818A (en) Process for the manufacture of farnesol
GB461972A (en) Improvements in the oxidation of hydrocarbons
DE616545C (en) Process for the production of cyclohexylated phenols
GB417072A (en) Improvements in or relating to the manufacture of vanillin and its homologues and other parahydroxy aldehydes such as protocatechuic aldehyde
GB451595A (en) Treatment of rubber
CH188497A (en) Process for making a viscous tar product.
GB290649A (en)
CH196545A (en) Process for the preparation of eis-Androstandiol- (3.17).
GB244598A (en) Process of making emulsions using emulsifiers derived from wool fat