HUT54670A - Process for producing intermediates of alkyl-ester of isodehydro-acetic acid - Google Patents
Process for producing intermediates of alkyl-ester of isodehydro-acetic acidInfo
- Publication number
- HUT54670A HUT54670A HU395689A HU395689A HUT54670A HU T54670 A HUT54670 A HU T54670A HU 395689 A HU395689 A HU 395689A HU 395689 A HU395689 A HU 395689A HU T54670 A HUT54670 A HU T54670A
- Authority
- HU
- Hungary
- Prior art keywords
- alkyl
- acid
- isodehydro
- ester
- acetic acid
- Prior art date
Links
Abstract
Intermediates of iso-hydro-acetic-acid-alkyl-esters of general formula (I) (R = low C alkyl gp.) are prepd. by condensation of aceto-acetic-acid-alkyl-esters (II) -w-in the presence of hydrochloric acid. Acid and solvents are removed from the reaction mix which is then mixed with or pref. poured into water. - Cpds. (I) acrystallised and filtered. Alkali metal or ammonium salts are added to the filtrate to approach or reach saturation pt. The soln. is extracted by a water-immiscible solvent for (II). The soln is evaporated and (II) is reused.-a
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HU395689A HU205101B (en) | 1989-08-04 | 1989-08-04 | Process for producing isodehydroacetic acid alkyl esters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HU395689A HU205101B (en) | 1989-08-04 | 1989-08-04 | Process for producing isodehydroacetic acid alkyl esters |
Publications (2)
Publication Number | Publication Date |
---|---|
HUT54670A true HUT54670A (en) | 1991-03-28 |
HU205101B HU205101B (en) | 1992-03-30 |
Family
ID=10966224
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HU395689A HU205101B (en) | 1989-08-04 | 1989-08-04 | Process for producing isodehydroacetic acid alkyl esters |
Country Status (1)
Country | Link |
---|---|
HU (1) | HU205101B (en) |
-
1989
- 1989-08-04 HU HU395689A patent/HU205101B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
HU205101B (en) | 1992-03-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
HC9A | Change of name, address |
Owner name: EGIS GYOGYSZERGYAR NYRT., HU Free format text: FORMER OWNER(S): EGIS GYOGYSZERGYAR, HU |
|
MM4A | Lapse of definitive patent protection due to non-payment of fees |