SU787407A1 - Method of preparing 2-methyl-6-cyano- and 2,6-dicyanopyridines - Google Patents
Method of preparing 2-methyl-6-cyano- and 2,6-dicyanopyridines Download PDFInfo
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- SU787407A1 SU787407A1 SU792730183A SU2730183A SU787407A1 SU 787407 A1 SU787407 A1 SU 787407A1 SU 792730183 A SU792730183 A SU 792730183A SU 2730183 A SU2730183 A SU 2730183A SU 787407 A1 SU787407 A1 SU 787407A1
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- USSR - Soviet Union
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- methyl
- catalyst
- yield
- increase
- dicyanopyridines
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- Pyridine Compounds (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Description
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Изобретение относитс к усовершен ствованному способу получени 2,6-дицианпиридина и 2-метил-6-ч1ианпириаина, которые наход т широкое применение в синтезе биологически активных соединений и в производстве полимерных материалов .The invention relates to an improved process for the preparation of 2,6-dicyanopyridine and 2-methyl-6-h1-pyrianaine, which are widely used in the synthesis of biologically active compounds and in the manufacture of polymeric materials.
Известен способ получени 2,6-аицианпиридина и 2-метил-6- 1ианпириаина окислительным аммонолизом 2,6- 1утиди- на в присутствии окисного ванадиево-се- ребр ного катализатора при 410-470 С. Максимальные выходы указанных нитрилов-составл ет 16 и 50% соответственно , счита на прореагировавший 2,6-лутицин (14 и 26% в расчете на поданное сырье). Суммарный выход обоих нитрилов в одном цикле не превышает 36% |l.A known method for producing 2,6-acyanopyridine and 2-methyl-6-1-pyriana is by oxidative ammonolysis of 2,6-1-utidine in the presence of oxide vanadium-silver catalyst at 410-470 C. The maximum yields of these nitriles are 16 and 50%, respectively, counting on the reacted 2,6-lutycin (14 and 26%, calculated on the feedstock). The total yield of both nitriles in one cycle does not exceed 36% | l.
Недостатками этого способа вл ютс низкий выход целевых продуктов и применение дорогого и сложного в изготовлении катализатора.The disadvantages of this method are the low yield of the target products and the use of expensive and difficult to manufacture catalyst.
Наиболее -близким к предлагаемому вл етс способ получени 2,6-дициан-The closest to the proposed method is the preparation of 2,6-dicyanol
И 2-метил-6-цианпиридинов окислительным аммонолизом 2,6-лутидина над окисным ванадиево -титановым катализатором ( 2.0. , TiO2. ) при 350-370 С. Выход 2,6-д циaнm pидинa 40-60%, мононитрила 7-19%, в расчете на поданный 2,6-ллутидин. Суммарный выход нитрилов за 1 цикл 58-67% 2.And 2-methyl-6-cyanpyridines by oxidative ammonolysis of 2,6-lutidine over vanadium oxide-titanium catalyst (2.0., TiO2.) At 350-370 C. The yield of 2,6-d cyanide is 40-60%, mononitrile 7- 19%, based on 2,6-llutidine. The total yield of nitriles per 1 cycle is 58-67% 2.
Однако дранный способ характеризуетс недостаточно высоким выходом 2,6-дицианпиридина и низким выходом 2-ме- тш1-6-41ианпиридина.However, the durr method is characterized by an insufficiently high yield of 2,6-dicyanopyridine and a low yield of 2-mash 1-6-41 yanopyridine.
Шль изобретени - увеличение выхода целевых продуктов и повышение селективности процесса.The invention is an increase in the yield of the target products and an increase in the selectivity of the process.
Поставленна , цель достигаетс тем, что ок ислительный аммонолиз 2,6-глутидина провод т в присутствии катализатораплавленой п тиокиси ванади при 320380С .The goal set is achieved by the fact that the oxidative ammonolysis of 2,6-glutidine is carried out in the presence of a catalyst with fused vanadium pentoxide at 3203 ° C.
При 380 С и времени контакта 0,5 с процессе направл етс в сторону обраг(о- вани 2,6-дицианпиридина, его выходAt 380 ° C and a contact time of 0.5 s, the process is directed towards the treatment (formation of 2,6-dicyanopyridine, its output
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792730183A SU787407A1 (en) | 1979-02-23 | 1979-02-23 | Method of preparing 2-methyl-6-cyano- and 2,6-dicyanopyridines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792730183A SU787407A1 (en) | 1979-02-23 | 1979-02-23 | Method of preparing 2-methyl-6-cyano- and 2,6-dicyanopyridines |
Publications (1)
Publication Number | Publication Date |
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SU787407A1 true SU787407A1 (en) | 1980-12-15 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SU792730183A SU787407A1 (en) | 1979-02-23 | 1979-02-23 | Method of preparing 2-methyl-6-cyano- and 2,6-dicyanopyridines |
Country Status (1)
Country | Link |
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SU (1) | SU787407A1 (en) |
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1979
- 1979-02-23 SU SU792730183A patent/SU787407A1/en active
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