ES227157A2 - Procedure for obtaining dioxopyrazolidines. (Machine-translation by Google Translate, not legally binding) - Google Patents
Procedure for obtaining dioxopyrazolidines. (Machine-translation by Google Translate, not legally binding)Info
- Publication number
- ES227157A2 ES227157A2 ES0227157A ES227157A ES227157A2 ES 227157 A2 ES227157 A2 ES 227157A2 ES 0227157 A ES0227157 A ES 0227157A ES 227157 A ES227157 A ES 227157A ES 227157 A2 ES227157 A2 ES 227157A2
- Authority
- ES
- Spain
- Prior art keywords
- dioxopyrazolidines
- aryl radical
- alkyl
- carboxylic acid
- halide
- 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
- DNTVKOMHCDKATN-UHFFFAOYSA-N pyrazolidine-3,5-dione Chemical class O=C1CC(=O)NN1 DNTVKOMHCDKATN-UHFFFAOYSA-N 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 2
- 150000005840 aryl radicals Chemical class 0.000 abstract 4
- -1 alkyl radical Chemical class 0.000 abstract 3
- 125000003262 carboxylic acid ester group Chemical class [H]C([H])([*:2])OC(=O)C([H])([H])[*:1] 0.000 abstract 3
- 125000000217 alkyl group Chemical group 0.000 abstract 2
- 125000004438 haloalkoxy group Chemical group 0.000 abstract 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- 125000004036 acetal group Chemical group 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000007795 chemical reaction product Substances 0.000 abstract 1
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 125000001033 ether group Chemical group 0.000 abstract 1
- 150000002429 hydrazines Chemical class 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910000039 hydrogen halide Inorganic materials 0.000 abstract 1
- 239000012433 hydrogen halide Substances 0.000 abstract 1
- 239000002904 solvent Substances 0.000 abstract 1
Landscapes
- Plural Heterocyclic Compounds (AREA)
Abstract
Refinements on the procedure for obtaining dioxopyrazolidines of the general formula in which R1 represents an aryl radical or optionally an aryl radical substituted by halogen alkoxy or alkyl groups R2 hydrogen an alkyl radical or an aryl radical optionally substituted by halogen alkoxy or alkyl groups R3 an alkyl cycloalkyl aralkyl or aryl radical which may also be substituted by ether moieties acetal groups and/or amino-tertiary groups characterized in that monoacylaryl hydrazines of the general formula ** (see formula) ** in which R1 R2 and R3 have the aforementioned meaning, they are reacted with semi-halides of the carboxylic acid esters without preferably adding a condensing medium in the presence of excess semihalogenide of the carboxylic acid ester, and at elevated temperature, the elimination or removal of the hydrogen halide is removed from the excess halide halide of the carboxylic acid ester and the N-acyl-N'-carbalkoxyhydrazines formed from the general formulas ** (see formula) ** in which R1 R2 and R3 have the meaning indicated above and Alc represents an alkyl radical transformed in the presence of alkaline condensers and preferably in the presence of solvents that behave indifferently in the reaction and at elevated temperature and from the reaction products the corresponding dioxopyrazolidines formed are isolated. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE227157X | 1955-08-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES227157A2 true ES227157A2 (en) | 1956-05-01 |
Family
ID=38528276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES0227157A Expired ES227157A2 (en) | 1955-08-03 | 1956-03-07 | Procedure for obtaining dioxopyrazolidines. (Machine-translation by Google Translate, not legally binding) |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES227157A2 (en) |
-
1956
- 1956-03-07 ES ES0227157A patent/ES227157A2/en not_active Expired
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