SU170052A1 - - Google Patents
Info
- Publication number
- SU170052A1 SU170052A1 SU887861A SU887861A SU170052A1 SU 170052 A1 SU170052 A1 SU 170052A1 SU 887861 A SU887861 A SU 887861A SU 887861 A SU887861 A SU 887861A SU 170052 A1 SU170052 A1 SU 170052A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- acid
- ester
- sulfuric acid
- hours
- product
- Prior art date
Links
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- -1 chelidonic acid monoethyl ester Chemical class 0.000 claims description 7
- PBAYDYUZOSNJGU-UHFFFAOYSA-N Chelidonic acid Natural products OC(=O)C1=CC(=O)C=C(C(O)=O)O1 PBAYDYUZOSNJGU-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 230000005591 charge neutralization Effects 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000005712 crystallization Effects 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000001264 neutralization Effects 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- OXQGTIUCKGYOAA-UHFFFAOYSA-N 2-ethylbutanoic acid Chemical compound CCC(CC)C(O)=O OXQGTIUCKGYOAA-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N HCl Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L cacl2 Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
Description
Известен способ получени моноэтилового эфира хелидоновой кислоты, заключающийс в том, что через спиртовой раствор диэтилового эфира ацетондищавелевой кислоты, содержаш ,ий незначительное количество воды, пропускают хлороводород в течение 10 дней. При этом получают смесь моноэтилового эфира (76%) и диэтилового эфира хелидоновой кислоты (11%).A known method for producing chelidonic acid monoethyl ester is that a hydrogen chloride solution is passed through an alcohol solution of diethyl acetic acid ester acid, containing a small amount of water for 10 days. A mixture of monoethyl ester (76%) and chelidonic acid diethyl ester (11%) is obtained.
С целью упрощени технологического процесса и увеличени выхода продукта, диэтиловый эфир ацетондищавелевой кислоты подвергают обработке серной кислотой с последующим нагреванием при температуре 80-85° С в течение 3 час.In order to simplify the process and increase the yield of the product, diethyl ester of acetic acid and oxalic acid is treated with sulfuric acid, followed by heating at a temperature of 80-85 ° C for 3 hours.
Пример 1. В колбу, снабженную механп-, ческой мещалкой и обратным холодильником с хлоркальциевой трубкой, помещают 51,6 г сухого диэтилового эфира ацетондищавелевой кислоты и приливают 52 мл серной кислоты (уд. вес 1,84). После нагревани на вод ной бане при 80-85° С в течение 3 час реакционный раствор разлагают 200 г льда с добавлением поваренной соли до насыщени . На следующий день осадок отдел ют, промывают водой и хлороформом. Кристаллизацией из спирта получают 34,0 г (80% от теоретического) продукта. Т. пл. 223° С, эквивалент нейтрализации (по метилроту) 210, мол. вес 212.Example 1. In a flask equipped with a mechanic, baking dish and a reflux condenser with a calcium chloride tube, 51.6 g of dry diethyl ether of acetone is added to the gel and placed 52 ml of sulfuric acid (specific weight 1.84). After heating in a water bath at 80-85 ° C for 3 hours, the reaction solution is decomposed with 200 g of ice with the addition of sodium chloride to saturation. The next day, the precipitate is separated, washed with water and chloroform. Crystallization from alcohol gives 34.0 g (80% of theoretical) of the product. T. pl. 223 ° C, the equivalent of neutralization (by methylrot) 210, mol. weight 212.
Пример 2. 3,5 г сухого диэтилового эфира хелидоновой кислоты в растворе 5 мл серной кислоты (уд. вес 1,84) нагревают 3 час по примеру 1 с выделением н кристаллизацией продукта . Выход 2,5 г (80% от теоретического) Т. пл. 223° С, эквивалент нейтрализации (по метилроту) 211, мол. вес 212.Example 2. 3.5 g of dry diethyl ester of chelidonic acid in a solution of 5 ml of sulfuric acid (specific weight 1.84) is heated for 3 hours as in example 1 with the release and crystallization of the product. Yield 2.5 g (80% of theory). So pl. 223 ° C, the equivalent of neutralization (by methylrot) 211, mol. weight 212.
Предмет изобретени Subject invention
Claims (2)
Publications (1)
Publication Number | Publication Date |
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SU170052A1 true SU170052A1 (en) |
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