SU742431A1 - Method of preparing 1- and 2-alkyltetrazoles - Google Patents
Method of preparing 1- and 2-alkyltetrazoles Download PDFInfo
- Publication number
- SU742431A1 SU742431A1 SU782675214A SU2675214A SU742431A1 SU 742431 A1 SU742431 A1 SU 742431A1 SU 782675214 A SU782675214 A SU 782675214A SU 2675214 A SU2675214 A SU 2675214A SU 742431 A1 SU742431 A1 SU 742431A1
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- SU
- USSR - Soviet Union
- Prior art keywords
- allyl
- tetrazole
- alkyltetrazoles
- preparing
- allyltetrazole
- Prior art date
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- Plural Heterocyclic Compounds (AREA)
Description
Изобретение относитс к способу по лучени исходных продуктов в синтезе полимеров. Известен способ получени 1- и 2-аллилтетразолов взаимодействием тетра зола с бромистым аллилом в присутствии едкого натра в этиловом спирте при кип чении д.. Целевые продукты экстра гируют бензолом и перегон ют в вакуум Выход смеси 1- и 2-аллилтетразолов составл ет 66%, из них 1-аллилтетразол составл ет 37%, 2-аллилтетразол - 29% Недостатком этого способа вл етс низкий выход целевого продукта. Цель изобретени - повышение выхода целевых продуктов. Это достигаетс способом получени 1- и 2-аллилтетразолов взаимодействием тетразола с бромистым аллилом, где в качестве основани используют карбонат кали , а в качестве растворител - ацетон. Предлагаемый способ позвол ет повысить выход 1-й 2-аллилтетразолов до 95%, где 1-аллилтетразола 52%, 2-ал- лилтетразола 43%. П р и м е р . К суспензии 7О г тет- разола в 2ОО мл ацетона прибавл ют i 38 г углекислого кали . Смесь нагревают до кипени , к ней при перемешивании прибавл ют по капл м 95 мл бромистого аллила и кип чение продолжают в течение 9 ч. После охлаждени выпавший осадок отфильтровывают, промывают эфиром , раствор ют в воде и водный раствор. промьшают эфиром. Из фильтрата отгон ют растворитель, остаток раствор ют в эфире. Все эфирные растворы объедин ют и сушат сульфатом магни . Эфир отгон ют , продукт перегон ют в вакуут е. Полу- чают 77 г (43%) 2-аллилтетразола, т.кип. 63-65°С/10 мм рт. ст., h |f 1,4673 и 57,4 г (52%) 1-аллилтетразола , т.кип. 132 С/3 мм рт. ст., И 1,4854.This invention relates to a process for the preparation of starting materials in the synthesis of polymers. A known method for producing 1- and 2-allyltetrazoles by reacting tetrazole with allyl bromide in the presence of caustic soda in ethyl alcohol at the boil. , of which 1-allyl tetrazole is 37%, 2-allyl tetrazole — 29%. The disadvantage of this method is the low yield of the desired product. The purpose of the invention is to increase the yield of target products. This is achieved by a process for the preparation of 1- and 2-allyltetrazole by reacting tetrazole with allyl bromide, where potassium carbonate is used as the base, and acetone as the solvent. The proposed method allows to increase the yield of the 1st 2-allyltetrazole to 95%, where 1-allyltetrazole is 52%, 2-allyltetrazole is 43%. PRI me R. To a suspension of 7O g of tetrazol in 2OO ml of acetone was added i 38 g of potassium carbonate. The mixture is heated to boiling, 95 ml of allyl bromide is added dropwise to it with stirring, and the boiling is continued for 9 hours. After cooling, the precipitated precipitate is filtered, washed with ether, dissolved in water and the aqueous solution. Promoted by ether. The solvent was distilled off from the filtrate, the residue was dissolved in ether. All ethereal solutions were combined and dried with magnesium sulfate. The ether is distilled off, the product is distilled into vacuo. 77 g (43%) of 2-allyl tetrazole are obtained, b.p. 63-65 ° C / 10 mm Hg. Art., h | f 1,4673 and 57.4 g (52%) of 1-allyltetrazole, so kip. 132 C / 3 mmHg Art. And 1,4854.
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782675214A SU742431A1 (en) | 1978-10-18 | 1978-10-18 | Method of preparing 1- and 2-alkyltetrazoles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782675214A SU742431A1 (en) | 1978-10-18 | 1978-10-18 | Method of preparing 1- and 2-alkyltetrazoles |
Publications (1)
Publication Number | Publication Date |
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SU742431A1 true SU742431A1 (en) | 1980-06-25 |
Family
ID=20789777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU782675214A SU742431A1 (en) | 1978-10-18 | 1978-10-18 | Method of preparing 1- and 2-alkyltetrazoles |
Country Status (1)
Country | Link |
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SU (1) | SU742431A1 (en) |
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1978
- 1978-10-18 SU SU782675214A patent/SU742431A1/en active
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