SU498298A1 - The method of obtaining 5/6 / -amino-2- / pamino-phenyl / benzimidazole - Google Patents
The method of obtaining 5/6 / -amino-2- / pamino-phenyl / benzimidazoleInfo
- Publication number
- SU498298A1 SU498298A1 SU1992727A SU1992727A SU498298A1 SU 498298 A1 SU498298 A1 SU 498298A1 SU 1992727 A SU1992727 A SU 1992727A SU 1992727 A SU1992727 A SU 1992727A SU 498298 A1 SU498298 A1 SU 498298A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- amino
- obtaining
- benzimidazole
- pamino
- phenyl
- Prior art date
Links
Landscapes
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Description
Найдено, %: N 16,25; 16,18.Found,%: N 16.25; 16.18.
C,3Hi3N4-H20.H3P04.C, 3Hi3N4-H20.H3P04.
Вычислено, %: N 16,47.Calculated,%: N 16.47.
Полученный осадок суспендируют в 100 мл 1ВОДЫ, подщелачивают 25%-ным раствором аммиа.ка до рН 8,5-9, отфильтровывают 5 (6) -амино-2- (п-аминофенил) -бензЕМИдазол , промывают водой и сушат. Выход 13,2 г (90%), т. .пл. 230-23ГС (по литературным данным т. пл. 235-236° С). Фильтрат после отделени фосфорнокислой соли целевого продукта перегон ют в вакууме. Отогнанный изопропилавый спирт используют дл последующего выделени целевого вродукта. Остаток фосфорной кислоты укрепл ют фосфорным ангидридом до получени 116%-ной полифосфорной кислоты и используют дл проведени реакции конденсации. Процесс может быть непрерывным.The precipitate obtained is suspended in 100 ml of WATOD, alkalized with 25% ammonia solution until pH 8.5–9, 5 (6) -amino-2- (p-aminophenyl) benzimidazole is filtered, washed with water and dried. Yield 13.2 g (90%), t. Pl. 230-23GS (according to literary data, t. Pl. 235-236 ° C). After separation of the phosphate salt of the target product, the filtrate is distilled under vacuum. Distilled isopropyl alcohol is used for the subsequent isolation of the desired product. The phosphoric acid residue is strengthened with phosphoric anhydride to obtain 116% polyphosphoric acid and used to carry out a condensation reaction. The process can be continuous.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1992727A SU498298A1 (en) | 1974-02-06 | 1974-02-06 | The method of obtaining 5/6 / -amino-2- / pamino-phenyl / benzimidazole |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1992727A SU498298A1 (en) | 1974-02-06 | 1974-02-06 | The method of obtaining 5/6 / -amino-2- / pamino-phenyl / benzimidazole |
Publications (1)
Publication Number | Publication Date |
---|---|
SU498298A1 true SU498298A1 (en) | 1976-01-05 |
Family
ID=20574695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1992727A SU498298A1 (en) | 1974-02-06 | 1974-02-06 | The method of obtaining 5/6 / -amino-2- / pamino-phenyl / benzimidazole |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU498298A1 (en) |
-
1974
- 1974-02-06 SU SU1992727A patent/SU498298A1/en active
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