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-diacetInfo
- 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
Links
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
Landscapes
- 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.
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) |
-
1972
- 1972-02-04 NL NL7201506A patent/NL7201506A/en unknown
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