ES408236A1 - Method for producing pure 3,6-dioxo-4-hydroxy-tetrahydropyridazines - Google Patents
Method for producing pure 3,6-dioxo-4-hydroxy-tetrahydropyridazinesInfo
- Publication number
- ES408236A1 ES408236A1 ES408236A ES408236A ES408236A1 ES 408236 A1 ES408236 A1 ES 408236A1 ES 408236 A ES408236 A ES 408236A ES 408236 A ES408236 A ES 408236A ES 408236 A1 ES408236 A1 ES 408236A1
- Authority
- ES
- Spain
- Prior art keywords
- tetrahydropyridazines
- dioxo
- hydroxy
- radical
- carbon atoms
- 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
Links
Abstract
Procedure for the purification of 3,6-dioxo-4-hydroxy-tetrahydropyridazines of the general formula I **(See formula)** where R1 and R2 represent straight or branched alcohol radicals with 1 to 5 carbon atoms, phenyl radicals, which may optionally be substituted by halogen or alcohol groups, or phenylalkyl radicals and R3 represents a straight or branched alcohol radical with 1 to 5 carbon atoms, a phenyl radical, a phenylalkyl radical or an alicyclic radical with up to 6 carbon atoms, characterized in that salts of the 3,6-dioxo-4-hydroxy-tetrahydropyridazines of formula I are prepared with nitrogenous bases Organic, then the salts are purified by recrystallization from an organic solvent and from these the 3,6-dioxo-4-hydroxy-tetrahydropyridazines are recovered again as pure colorless products. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19712155001 DE2155001A1 (en) | 1971-11-05 | 1971-11-05 | PROCESS FOR THE PREPARATION OF PURE 3,6-DIOXO-4-HYDROXY-TETRAHYDROPYRIDAZINES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES408236A1 true ES408236A1 (en) | 1975-11-16 |
Family
ID=5824280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES408236A Expired ES408236A1 (en) | 1971-11-05 | 1972-11-03 | Method for producing pure 3,6-dioxo-4-hydroxy-tetrahydropyridazines |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS4854092A (en) |
| AR (1) | AR197307A1 (en) |
| AT (1) | AT319258B (en) |
| BE (1) | BE790922A (en) |
| DE (1) | DE2155001A1 (en) |
| ES (1) | ES408236A1 (en) |
| FR (1) | FR2159996A5 (en) |
| GB (1) | GB1397257A (en) |
| LU (1) | LU66407A1 (en) |
| NL (1) | NL7214866A (en) |
-
0
- BE BE790922D patent/BE790922A/en unknown
-
1971
- 1971-11-05 DE DE19712155001 patent/DE2155001A1/en active Pending
-
1972
- 1972-02-04 JP JP1278172A patent/JPS4854092A/ja active Pending
- 1972-11-02 AR AR24494672A patent/AR197307A1/en active
- 1972-11-02 AT AT931372A patent/AT319258B/en not_active IP Right Cessation
- 1972-11-03 GB GB5075072A patent/GB1397257A/en not_active Expired
- 1972-11-03 NL NL7214866A patent/NL7214866A/xx unknown
- 1972-11-03 ES ES408236A patent/ES408236A1/en not_active Expired
- 1972-11-03 LU LU66407D patent/LU66407A1/xx unknown
- 1972-11-03 FR FR7238905A patent/FR2159996A5/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2155001A1 (en) | 1973-05-17 |
| FR2159996A5 (en) | 1973-06-22 |
| LU66407A1 (en) | 1973-11-12 |
| BE790922A (en) | 1973-05-03 |
| GB1397257A (en) | 1975-06-11 |
| AT319258B (en) | 1974-12-10 |
| JPS4854092A (en) | 1973-07-30 |
| AR197307A1 (en) | 1974-03-29 |
| NL7214866A (en) | 1973-05-08 |
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