JPS57136548A - Preparation of 3,5-di-alkyl-4-hydroxyphenylpropionic higher alkyl ester - Google Patents
Preparation of 3,5-di-alkyl-4-hydroxyphenylpropionic higher alkyl esterInfo
- Publication number
- JPS57136548A JPS57136548A JP56022189A JP2218981A JPS57136548A JP S57136548 A JPS57136548 A JP S57136548A JP 56022189 A JP56022189 A JP 56022189A JP 2218981 A JP2218981 A JP 2218981A JP S57136548 A JPS57136548 A JP S57136548A
- Authority
- JP
- Japan
- Prior art keywords
- alkyl
- hydroxyphenylpropionic
- catalyst
- ester
- formulai
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
PURPOSE: To obtain the titled compound, having improved initial color tone and reduced discoloration with time, and useful as a stabilizer for organic compounds without requiring complicated purifying steps, by using an acidic catalyst as a catalyst in the ester interchange reaction of a 3,5-di-alkyl-4-hydroxyphenylpropionic alkyl ester with a high alkyl alcohol.
CONSTITUTION: A 3,5-di-alkyl-4-hydroxyphenylpropionic alkyl ester of formulaI (R1 is 1W8C alkyl; R2 and R3 are H or 1W12C alkyl; however, both are not H at the same time) is subjected to the ester interchange reaction with a higher alkyl alcohol of the formula R4-OH (R4 is 4W20C alkyl; however, the carbon number is larger than that of R1) in the presence of an aromatic sulfonic acid, e.g. p-toluenesulfonic acid, or a cation exchange resin as a catalyst, preferably at 60W120°C and 1W30mmHg, to give the aimed compound of formula II. Preferably, the amount of the p-toluenesulfonic acid as the catalyst added is 0.01W 0.20mol based on one mole compound of formulaI, and that of the cation exchange resin is 50W150g.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56022189A JPS57136548A (en) | 1981-02-19 | 1981-02-19 | Preparation of 3,5-di-alkyl-4-hydroxyphenylpropionic higher alkyl ester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56022189A JPS57136548A (en) | 1981-02-19 | 1981-02-19 | Preparation of 3,5-di-alkyl-4-hydroxyphenylpropionic higher alkyl ester |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57136548A true JPS57136548A (en) | 1982-08-23 |
Family
ID=12075844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56022189A Pending JPS57136548A (en) | 1981-02-19 | 1981-02-19 | Preparation of 3,5-di-alkyl-4-hydroxyphenylpropionic higher alkyl ester |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57136548A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6291703B1 (en) | 1998-02-09 | 2001-09-18 | Ciba Specialty Chemicals Corporation | Preparation of substituted hydroxyhydrocinnamate esters by continuous transesterification using reactive distillation |
-
1981
- 1981-02-19 JP JP56022189A patent/JPS57136548A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6291703B1 (en) | 1998-02-09 | 2001-09-18 | Ciba Specialty Chemicals Corporation | Preparation of substituted hydroxyhydrocinnamate esters by continuous transesterification using reactive distillation |
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