RU2013138525A - METHOD FOR PRODUCING DIALKYL ETHERS OF 4,5-Dicyanophthalic Acid - Google Patents
METHOD FOR PRODUCING DIALKYL ETHERS OF 4,5-Dicyanophthalic Acid Download PDFInfo
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- RU2013138525A RU2013138525A RU2013138525/04A RU2013138525A RU2013138525A RU 2013138525 A RU2013138525 A RU 2013138525A RU 2013138525/04 A RU2013138525/04 A RU 2013138525/04A RU 2013138525 A RU2013138525 A RU 2013138525A RU 2013138525 A RU2013138525 A RU 2013138525A
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- acid
- dicyanophthalic
- dicarbalkoxyphthalimide
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- producing dialkyl
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Indole Compounds (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
Abstract
Способ получения диалкиловых эфиров 4,5-дицианофталевой кислоты,включающий стадии раскрытия имидного цикла 4,5-дикарбалкоксифталимида с получением эфира 4,5-дикарбамоилфталевой кислоты с последующей его дегидратацией до соответствующего диалкилового эфира 4,5-дицианофталевой кислоты, отличающийся тем, что в качестве исходного продукта используют пиромеллитовую кислоту, которую превращают в 4,5-дикарбоксифталимид взаимодействием с водным аммиаком с последующим нагреванием полученной соли до 260-270°C, который затем этерифицируют с образованием 4,5-дикарбалкоксифталимида.The method of producing dialkyl esters of 4,5-dicyanophthalic acid, comprising the steps of opening the imide cycle of 4,5-dicarbalkoxyphthalimide to produce 4,5-dicarbamoylphthalic acid ester followed by its dehydration to the corresponding 4,5-dicyanophthalic acid dialkyl ester, characterized in that Pyromellitic acid is used as the starting product, which is converted into 4,5-dicarboxyphthalimide by reaction with aqueous ammonia, followed by heating of the resulting salt to 260-270 ° C, which is then esterified to form 4,5-dicarbalkoxyphthalimide.
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RU2013138525/04A RU2533121C2 (en) | 2013-08-20 | 2013-08-20 | Method of obtaining dialkyl ethers of 4,5-dicyanophthalic acid |
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RU2013138525/04A RU2533121C2 (en) | 2013-08-20 | 2013-08-20 | Method of obtaining dialkyl ethers of 4,5-dicyanophthalic acid |
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RU2013138525A true RU2013138525A (en) | 2014-01-10 |
RU2533121C2 RU2533121C2 (en) | 2014-11-20 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111018664A (en) * | 2019-12-27 | 2020-04-17 | 江苏广域化学有限公司 | Synthesis method of 2-alkyl-1, 3-propanediol compound |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111018664A (en) * | 2019-12-27 | 2020-04-17 | 江苏广域化学有限公司 | Synthesis method of 2-alkyl-1, 3-propanediol compound |
CN111018664B (en) * | 2019-12-27 | 2023-04-14 | 江苏广域化学有限公司 | Synthesis method of 2-alkyl-1, 3-propanediol compound |
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RU2533121C2 (en) | 2014-11-20 |
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Effective date: 20180821 |