ES419809A1 - A procedure for the production of 3,4-dihydro-2H-piran -2,4-dionas. (Machine-translation by Google Translate, not legally binding) - Google Patents
A procedure for the production of 3,4-dihydro-2H-piran -2,4-dionas. (Machine-translation by Google Translate, not legally binding)Info
- Publication number
- ES419809A1 ES419809A1 ES419809A ES419809A ES419809A1 ES 419809 A1 ES419809 A1 ES 419809A1 ES 419809 A ES419809 A ES 419809A ES 419809 A ES419809 A ES 419809A ES 419809 A1 ES419809 A1 ES 419809A1
- Authority
- ES
- Spain
- Prior art keywords
- carbon atoms
- formula
- less
- dihydro
- translation
- 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
Landscapes
- Pyrane Compounds (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
A process for the production of 3,4-dihydro-2H-pyran-2,4-diones, of the formula **(See formula)** and its salts; whose procedure is to react a compound of formula **(See formula)** with a compound of formula NH2-0-R3 in whose formulas X is hydrogen or halogen; R1 is alkyl of 6 or less carbon atoms or phenyl; R2 is alkyl of 1 to 20 carbon atoms, haloalkyl of 6 carbon atoms or less, phenyl, phenyl substituted by halogen or nitro, benzyl, phenoxymethyl or 2-phenylvinyl; R3 is hydrogen, alkyl of 1 to 10 carbon atoms, alkenyl of 6 carbon atoms or less, alkynyl of 6 carbon atoms or less, or benzyl; with the proviso that and R2 do not simultaneously represent a methyl group; 1) producing the sodium or potassium salts by reacting a compound of formula (1) with sodium or potassium hydroxide in an organic solvent at room temperature. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10496272A JPS5147773B2 (en) | 1972-10-20 | 1972-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES419809A1 true ES419809A1 (en) | 1976-08-01 |
Family
ID=14394710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES419809A Expired ES419809A1 (en) | 1972-10-20 | 1973-10-19 | A procedure for the production of 3,4-dihydro-2H-piran -2,4-dionas. (Machine-translation by Google Translate, not legally binding) |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5147773B2 (en) |
| AR (1) | AR208655A1 (en) |
| AU (1) | AU476908B2 (en) |
| BR (1) | BR7308209D0 (en) |
| EG (1) | EG11220A (en) |
| ES (1) | ES419809A1 (en) |
| ZA (1) | ZA738077B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS581081B2 (en) * | 1975-11-27 | 1983-01-10 | ホクコウカガクコウギヨウ カブシキガイシヤ | Nouengeiyousatsukinzai |
-
1972
- 1972-10-20 JP JP10496272A patent/JPS5147773B2/ja not_active Expired
-
1973
- 1973-10-17 ZA ZA738077A patent/ZA738077B/en unknown
- 1973-10-19 ES ES419809A patent/ES419809A1/en not_active Expired
- 1973-10-19 AU AU61625/73A patent/AU476908B2/en not_active Expired
- 1973-10-19 BR BR820973A patent/BR7308209D0/en unknown
- 1973-10-22 AR AR25062573A patent/AR208655A1/en active
- 1973-12-24 EG EG48473A patent/EG11220A/en active
Also Published As
| Publication number | Publication date |
|---|---|
| AU476908B2 (en) | 1976-10-07 |
| JPS5147773B2 (en) | 1976-12-16 |
| EG11220A (en) | 1977-01-31 |
| AU6162573A (en) | 1975-04-24 |
| JPS4962471A (en) | 1974-06-17 |
| AR208655A1 (en) | 1977-02-28 |
| ZA738077B (en) | 1974-12-24 |
| BR7308209D0 (en) | 1974-06-27 |
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