SU469700A1 - Method for preparing 2,2-diimidazole - Google Patents
Method for preparing 2,2-diimidazoleInfo
- Publication number
- SU469700A1 SU469700A1 SU1796556A SU1796556A SU469700A1 SU 469700 A1 SU469700 A1 SU 469700A1 SU 1796556 A SU1796556 A SU 1796556A SU 1796556 A SU1796556 A SU 1796556A SU 469700 A1 SU469700 A1 SU 469700A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- diimidazole
- ammonia
- preparing
- glyoxal
- sulfate
- Prior art date
Links
Landscapes
- Nitrogen Condensed Heterocyclic Rings (AREA)
Description
1one
Изобретение относитс к способу получени 2,2-диимидазола, используемого в синтезе биологически активных веществ.This invention relates to a process for the preparation of 2,2-diimidazole used in the synthesis of biologically active substances.
Известен способ получени 2,2-диимидазола взаимодействием глиоксал с аммиаком. A known method for producing 2,2-diimidazole by the interaction of glyoxal with ammonia.
Недостатком известного способа вл етс низкий выход целевого продукта ().The disadvantage of this method is the low yield of the target product ().
Цель изобретени - устранение указанного недостатка-достигаетс тем, что глиоксальсульфат ввод т в концентрированный водный раствор аммиака.The purpose of the invention is to eliminate this drawback-that is achieved by introducing glyoxal sulfate into a concentrated aqueous ammonia solution.
Выход целевого продукта 32-38%.The yield of the target product 32-38%.
Пример. К 900 мл 25%-ного водного раствора аммиака, помещенным в реактор объемом 3000 мл, присыпают 654,0 г (3,0 г-моль) глиоксальсульфата. После присыпани 250 г глиоксальсульфата температура в реакторе достигает 50-60°С и начинаетс образование 2,2-диимидазола. Подачу глиоксальсульфата замедл ют и одновременно начинают подавать 1000 мл 25%-пого водного раствора аммиака, поддержива те.мпературу в реакторе 60-70°С изменением скорости подачи глиоксальсульфата и аммиака, а также с помощью охлаждающей воды. Подачу аммиака заканчивают одновременно с прекращением подачи глиоксальсульфата, после чего реакционную массу выдерживают 10-15 мин, охлаждают , отфильтровывают 2,2-диимидазол, промывают его водой и ацетоном. Вы.ход 45-Г 0 г (32-38%).Example. 654.0 g (3.0 g-mol) of glyoxal sulfate are added to 900 ml of a 25% aqueous solution of ammonia placed in a 3000 ml reactor. After powdering 250 g of glyoxal sulfate, the temperature in the reactor reaches 50-60 ° C and the formation of 2,2-diimidazole begins. The supply of glyoxal sulfate is slowed down and 1000 ml of a 25% aqueous ammonia solution are simultaneously started to be fed, maintaining a temperature of 60-70 ° C in the reactor by varying the feed rate of glyoxal sulfate and ammonia, as well as using cooling water. The flow of ammonia is completed simultaneously with the termination of the supply of glyoxal sulfate, after which the reaction mass is kept for 10-15 minutes, cooled, 2,2-diimidazole is filtered off, washed with water and acetone. You. 45-G 0 g (32-38%).
Предмет изобретени Subject invention
Способ получени 2,2-диимидазола на основе аммиака, отличающийс тем, что, с целью повышени выхода целевого продукта, аммиак подвергают взаимодействию с глиоксальсульфатом , причем .последний ввод т в концентрированный водный раствор аммнака.A method of producing 2,2-diimidazole based on ammonia, characterized in that, in order to increase the yield of the target product, ammonia is reacted with glyoxal sulfate, the latter being introduced into a concentrated aqueous solution of ammonia.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1796556A SU469700A1 (en) | 1972-06-13 | 1972-06-13 | Method for preparing 2,2-diimidazole |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1796556A SU469700A1 (en) | 1972-06-13 | 1972-06-13 | Method for preparing 2,2-diimidazole |
Publications (1)
Publication Number | Publication Date |
---|---|
SU469700A1 true SU469700A1 (en) | 1975-05-05 |
Family
ID=20517805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1796556A SU469700A1 (en) | 1972-06-13 | 1972-06-13 | Method for preparing 2,2-diimidazole |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU469700A1 (en) |
-
1972
- 1972-06-13 SU SU1796556A patent/SU469700A1/en active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1117903A (en) | Process for the production of anhydrous crystalline fructose | |
ES405961A1 (en) | Process for preparing an iron-saccharide complex | |
SU469700A1 (en) | Method for preparing 2,2-diimidazole | |
GB1405269A (en) | Preparation of melamine-formaldehyde resin solutions | |
SU584002A1 (en) | Method of preparing iodized betaine | |
US3737454A (en) | Racemization of optically active ammonium n-acetyl-alpha-aminophenylacetate | |
US2376334A (en) | Synthesis of beta-alanine | |
SU149427A1 (en) | Method for preparing monothiocarbamic acid alkyl S-esters | |
JP2773920B2 (en) | Method for producing tetraammine palladium (II) chloride | |
SU437761A1 (en) | Method for preparing 6-amino-substituted 2,3,5-trichloro-4-mercaptopyridines | |
US2417440A (en) | Preparation of guanidine salts | |
US2779760A (en) | Lithium maltobionate and process for making same | |
US3420876A (en) | Process for preparing 1-amino-3-carboxypropane-2-sulfonic acid | |
ES414393A1 (en) | Process for the manufacture of inorganic acid addition salts of urea | |
SU137910A1 (en) | Method for producing malonic acid | |
US2994716A (en) | Addition product of tetracycline and methanol and process for preparing it | |
SU458556A1 (en) | Method for preparing substituted 2-oxo or 2-thioxohexahydro-1,3,5-triazines | |
SU763329A1 (en) | Method of preparing di-alpha-aminoacids | |
GB1036815A (en) | Method of producing n-methyleneglycinonitrile | |
SU386968A1 (en) | METHOD FOR OBTAINING A GRADUAL FORM OF PHTHALOCYANOGEN.4.4 “ZM” | |
GB1466444A (en) | Manufacture of formaldehyde | |
US2775598A (en) | Process of preparing pyridoxal isonicotinoylhydrazone and intermediate used therein | |
SU438647A1 (en) | Method for preparing sodium metal sulfonate | |
SU119529A1 (en) | The method of obtaining rhodanine | |
SU431161A1 (en) | METHOD OF OBTAINING TIOCHOLINE |