SU592823A1 - Method of preparing 5-amino-2,3-dimethylquinoxaline - Google Patents
Method of preparing 5-amino-2,3-dimethylquinoxalineInfo
- Publication number
- SU592823A1 SU592823A1 SU752302687A SU2302687A SU592823A1 SU 592823 A1 SU592823 A1 SU 592823A1 SU 752302687 A SU752302687 A SU 752302687A SU 2302687 A SU2302687 A SU 2302687A SU 592823 A1 SU592823 A1 SU 592823A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- dimethylquinoxaline
- amino
- preparing
- reacted
- sulfuric acid
- Prior art date
Links
Description
Изобретение относитс к новому способу получени 5-ам,ино-2,3 - диметилхиноксалина, который про вл ет биологическую активность, и может найти применение в медицине.The invention relates to a new method for producing 5-am, alko-2,3-dimethylquinoxaline, which exhibits biological activity, and can be used in medicine.
Известен способ получени 5-амино-2,3диметилхиноксалина , заключаюндийс в том, что 1,2,3-трнаминобензол подвергают взаимодействию с диметилглиоксимом при 78-82° С в присутствии едкого натра 1.A known method for producing 5-amino-2,3-dimethylquinoxaline, concludes that 1,2,3-trnaminobenzene is reacted with dimethylglyoxime at 78-82 ° C in the presence of caustic soda 1.
Иедостатком известного способа получени 5-амино-2,3 - диметилхиноксалина вл етс трудна достунность исходного соединени - 1,2,3-триаминобензола, получаемого многостадийно из ортофенилендиамина, .который сначала превращают в бенз-2,1,3-тиаД|Иазол, далее нитруют и подвергают восстановительному расщеплению с помощью пинковой пыли и сол ной кислоты 2.The disadvantage of the known method for the preparation of 5-amino-2,3-dimethylquinoxaline is the difficult availability of the starting compound, 1,2,3-triaminobenzene, obtained by multistage orthophenylene diamine, which is first converted into benz-2,1,3-thiaD | Iazole, It is then nitrated and subjected to reductive cleavage with the help of kicks and hydrochloric acid 2.
Цель изобретени - упрощение процесса.The purpose of the invention is to simplify the process.
Указанна цель достигаетс тем, чтр 2,3диметилхиноксалип подвергают взаимодействию с сульфатом гидроксиламина в концентрированной серной кислоте в прис тствии п тиокиси ванади при 100±0,5°С.This goal is achieved by the fact that 2,3 dimethylquinoxalip is reacted with hydroxylamine sulfate in concentrated sulfuric acid in the presence of vanadium pentoxide at 100 ± 0.5 ° C.
Иример 1. К раствору 0,52 г (0,0033 мол) 2,3-диметилхиноксалина в 10 мл концентрированной серной кислоты при 100° С прибавл ют 0,27 г (0,0033 мол) сульфата гидроксиламина , 0,02 г п тиокисн ванади и выдерживают при перемешивании 5 ч.Irimer 1. To a solution of 0.52 g (0.0033 mol) of 2,3-dimethylquinoxaline in 10 ml of concentrated sulfuric acid at 100 ° C, 0.27 g (0.0033 mol) of hydroxylamine sulfate, 0.02 g of p vanadium thiocyanine and incubated with stirring for 5 hours
Реакционную массу охлаждают и выливают при перемешивании в 100 мл воды, подщелачивают на холоду 20%-ным раствором едкого натра, экстрагируют этилацетатом.The reaction mass is cooled and poured with stirring into 100 ml of water, basified in the cold with 20% sodium hydroxide solution, extracted with ethyl acetate.
Экстракт испар ют при комнатной температуре , остаток раствор ют в четыреххлористом углероде и хроматографируют па колонке с активированной окисью алюмини . Хроматограмму про вл ют четыреххлористым углеродол . Желтую зону отдел ют, элюируют ацетоном , элюат испар ют. Остаток - желтый порошок с т. пл. С.The extract is evaporated at room temperature, the residue is dissolved in carbon tetrachloride and the PA column is chromatographed with activated alumina. Chromatogram shows carbon tetrachloride. The yellow zone is separated, eluted with acetone, and the eluate is evaporated. The residue is a yellow powder with m. Pl. WITH.
Выход 0,07 г (20%, счита на вступивший в реакцию 2,3-диметилхиноксалин).Yield 0.07 g (20%, calculated on the reacted 2,3-dimethylquinoxaline).
Найдено N, %: 23,84, 23,88.Found N,%: 23.84, 23.88.
СюНцЫз.Syuntsyz.
Вычислено N, %: 24,28.Calculated N,%: 24.28.
Т. пл. ацетильного производного 197- 198°С (из 30% спирта).T. pl. acetyl derivative 197-198 ° C (from 30% alcohol).
Найдено N, %: 19,36, 19,60.Found N,%: 19.36, 19.60.
..
Вычислено N, %: 19,54.Calculated N,%: 19.54.
После испарени растворител получают 0,19 г исходного 2,3-диметилхиноксалина.After evaporation of the solvent, 0.19 g of the starting 2,3-dimethylquinoxaline is obtained.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU752302687A SU592823A1 (en) | 1975-12-23 | 1975-12-23 | Method of preparing 5-amino-2,3-dimethylquinoxaline |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU752302687A SU592823A1 (en) | 1975-12-23 | 1975-12-23 | Method of preparing 5-amino-2,3-dimethylquinoxaline |
Publications (1)
Publication Number | Publication Date |
---|---|
SU592823A1 true SU592823A1 (en) | 1978-02-15 |
Family
ID=20641734
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU752302687A SU592823A1 (en) | 1975-12-23 | 1975-12-23 | Method of preparing 5-amino-2,3-dimethylquinoxaline |
Country Status (1)
Country | Link |
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SU (1) | SU592823A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1705178A1 (en) * | 2004-01-13 | 2006-09-27 | Nissan Chemical Industries, Ltd. | Aminoquinoxaline compound, polyaminoquinoxaline compound, and use thereof |
US7799894B2 (en) | 2004-02-06 | 2010-09-21 | Yamaguchi University | Electrode for energy storage device and process for producing the same |
-
1975
- 1975-12-23 SU SU752302687A patent/SU592823A1/en active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1705178A1 (en) * | 2004-01-13 | 2006-09-27 | Nissan Chemical Industries, Ltd. | Aminoquinoxaline compound, polyaminoquinoxaline compound, and use thereof |
EP1705178A4 (en) * | 2004-01-13 | 2007-09-19 | Nissan Chemical Ind Ltd | Aminoquinoxaline compound, polyaminoquinoxaline compound, and use thereof |
US7803898B2 (en) | 2004-01-13 | 2010-09-28 | Nissan Chemical Industries, Ltd. | Aminoquinoxaline compound, polyaminoquinoxaline compound, and use thereof |
US7799894B2 (en) | 2004-02-06 | 2010-09-21 | Yamaguchi University | Electrode for energy storage device and process for producing the same |
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