EA201400241A1 - METHOD FOR OBTAINING 5-AMINO-2- (4-AMINOPHENYL) -1H-BENZIMIDAZOLE - Google Patents

METHOD FOR OBTAINING 5-AMINO-2- (4-AMINOPHENYL) -1H-BENZIMIDAZOLE

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Publication number
EA201400241A1
EA201400241A1 EA201400241A EA201400241A EA201400241A1 EA 201400241 A1 EA201400241 A1 EA 201400241A1 EA 201400241 A EA201400241 A EA 201400241A EA 201400241 A EA201400241 A EA 201400241A EA 201400241 A1 EA201400241 A1 EA 201400241A1
Authority
EA
Eurasian Patent Office
Prior art keywords
dabi
aminophenyl
benzimidazole
amino
isolated
Prior art date
Application number
EA201400241A
Other languages
Russian (ru)
Other versions
EA024484B1 (en
Inventor
Юрий Валентинович Винокуров
Юрий Тимофеевич Ефимов
Светлана Александровна Селезнева
Original Assignee
Открытое акционерное общество "Химпром"
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Открытое акционерное общество "Химпром" filed Critical Открытое акционерное общество "Химпром"
Priority to EA201400241A priority Critical patent/EA024484B1/en
Publication of EA201400241A1 publication Critical patent/EA201400241A1/en
Publication of EA024484B1 publication Critical patent/EA024484B1/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)

Abstract

Изобретение относится к области органической химии и касается способа получения 5-амино-2-(4-аминофенил)-1Н-бензимидазола (ДАБИ), который находит применение в производстве волокнообразующих полимеров со специальными характеристиками, например, для производства параамидных высокопрочных термостойких волокон. Предложен способ получения ДАБИ, характеризующийся тем, что 2',4',4-триаминобензанилид подвергают циклодегидратации при 90-110°С в присутствии муравьиной кислоты или ее соли первоначально в среде разбавленного раствора соляной кислоты, полученную солянокислую соль ДАБИ выделяют путем введения концентрированной соляной кислоты, обрабатывают активированным углем в водном растворе при 90-110°С и рН среды 0,5-3,0, целевой продукт выделяют нейтрализацией газообразным аммиаком или аммиачной водой. Предложенным способом получают продукт с содержанием основного вещества не менее 99,2 мас.%.The invention relates to the field of organic chemistry and relates to a method for producing 5-amino-2- (4-aminophenyl) -1H-benzimidazole (DABI), which is used in the production of fiber-forming polymers with special characteristics, for example, for the production of para-amide high-strength heat-resistant fibers. A method of obtaining DABI, characterized by the fact that 2 ', 4', 4-diaminobenzanilide is subjected to cyclodehydration at 90-110 ° C in the presence of formic acid or its salt, initially in a dilute hydrochloric acid solution, the resulting hydrochloric acid salt of DABI is isolated by introducing concentrated hydrochloric acids, treated with activated carbon in an aqueous solution at 90-110 ° C and a pH of 0.5-3.0, the target product is isolated by neutralization with gaseous ammonia or ammonia water. The proposed method receive a product with a content of the basic substance of not less than 99.2 wt.%.

EA201400241A 2014-03-17 2014-03-17 Process for preparing 5-amino-2-(4-aminophenyl)-1h-benzimidazole EA024484B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EA201400241A EA024484B1 (en) 2014-03-17 2014-03-17 Process for preparing 5-amino-2-(4-aminophenyl)-1h-benzimidazole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EA201400241A EA024484B1 (en) 2014-03-17 2014-03-17 Process for preparing 5-amino-2-(4-aminophenyl)-1h-benzimidazole

Publications (2)

Publication Number Publication Date
EA201400241A1 true EA201400241A1 (en) 2015-09-30
EA024484B1 EA024484B1 (en) 2016-09-30

Family

ID=54198830

Family Applications (1)

Application Number Title Priority Date Filing Date
EA201400241A EA024484B1 (en) 2014-03-17 2014-03-17 Process for preparing 5-amino-2-(4-aminophenyl)-1h-benzimidazole

Country Status (1)

Country Link
EA (1) EA024484B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109093A (en) * 1975-01-14 1978-08-22 Produits Chimiques Ugine Kuhlmann Process for making 2-(4'-aminophenyl) 5-amino benzimidazole
RU1438178C (en) * 1986-03-17 1995-07-25 Чебоксарское производственное объединение "Химпром" Method of synthesis of 5(6)-amino-2-(4'-aminophenyl)benzimidazole
RU2283307C1 (en) * 2005-07-18 2006-09-10 Открытое акционерное общество "Каменскволокно" (ОАО "Каменскволокно") Method for preparing 5(6)-amino-2-(4'-aminophenyl)-benzimidazole
RU2345988C2 (en) * 2006-06-30 2009-02-10 Евгений Львович Вулах Method of obtaining 5(6)-amino-2-(4-aminophenyl) benzimidazole

Also Published As

Publication number Publication date
EA024484B1 (en) 2016-09-30

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MM4A Lapse of a eurasian patent due to non-payment of renewal fees within the time limit in the following designated state(s)

Designated state(s): AM KG TJ TM