NL7201506A - Pure 1-acetoxy-3-methyl-2-butene-4-al prepn - from technical mixtures of 1,2-diacetoxy-3-methyl-4-butanal and 1,2-diacet - Google Patents

Pure 1-acetoxy-3-methyl-2-butene-4-al prepn - from technical mixtures of 1,2-diacetoxy-3-methyl-4-butanal and 1,2-diacet

Info

Publication number
NL7201506A
NL7201506A NL7201506A NL7201506A NL7201506A NL 7201506 A NL7201506 A NL 7201506A NL 7201506 A NL7201506 A NL 7201506A NL 7201506 A NL7201506 A NL 7201506A NL 7201506 A NL7201506 A NL 7201506A
Authority
NL
Netherlands
Prior art keywords
methyl
diacetoxy
catalyst
diacet
butanal
Prior art date
Application number
NL7201506A
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
Priority claimed from DE19712106242 external-priority patent/DE2106242C3/en
Application filed filed Critical
Publication of NL7201506A publication Critical patent/NL7201506A/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00—Preparation of carboxylic acid esters
    • C07C67/28—Preparation of carboxylic acid esters by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group
    • C07C67/297—Preparation of carboxylic acid esters by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups

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

Abstract

According to parent patent 754869 the mixture is treated at 50-180 degrees C with 0.001-10% of a catalyst of formula: Q+Y- (where Q+ is an ammonium or alkali metal cation or the equivalent of an alkaline earth metal cation or of a polyvalent anion exchanger; Y- is a strongly nucleophilic anion or when it is polyvalent, its equivalent); title cpd. is then separated from unchanged 1:2-diacetoxy-5-pentanal. In the present improvement, almost quantitative yields of title cpd., for use in the synthesis of Vitamin A cpds., are obtd. by effecting the reaction at 140-180% using 0.001% of the catalyst (w.r.t. the amt. of mixt.). Catalyst may be absent.
NL7201506A 1971-02-10 1972-02-04 Pure 1-acetoxy-3-methyl-2-butene-4-al prepn - from technical mixtures of 1,2-diacetoxy-3-methyl-4-butanal and 1,2-diacet NL7201506A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712106242 DE2106242C3 (en) 1971-02-10 Process for the preparation of pure 1-acetoxy-S-methyl-Z-buten ^ -al

Publications (1)

Publication Number Publication Date
NL7201506A true NL7201506A (en) 1972-08-14

Family

ID=5798323

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7201506A NL7201506A (en) 1971-02-10 1972-02-04 Pure 1-acetoxy-3-methyl-2-butene-4-al prepn - from technical mixtures of 1,2-diacetoxy-3-methyl-4-butanal and 1,2-diacet

Country Status (1)

Country Link
NL (1) NL7201506A (en)

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