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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 3. Отображено 3.
07-10-2009 дата публикации

Method of de-alkyl amine

Номер: CN0101550047A
Автор: ZHANG KE, XU JINFENG, GAO XINGZHU, PENG XIAN, SHI YIFENG, MA RUJIAN, CHEN SHUHUI, KE ZHANG, JINFENG XU, XINGZHU GAO, XIAN PENG, YIFENG SHI, RUJIAN MA, SHUHUI CHEN
Принадлежит:

The invention relates to a method of de-tert-alkyl amine, which mainly solves the technical problems of over strong reacting conditions and low yield of the prior method. The method of de-tert-alkyl amine is characterized in that tertiary tert-alkyl acid amide is reacted in the mixed solution of trifluoroacetic acid and water and is hydrolyzed into corresponding carboxylic acids, the volume ratio of the trifluoroacetic acid and water is 1-100: 0-5, and the reacting formula is as above. In the formula, R and R' are the alkyl group or the aromatic group of C1 to C20, and the reaction temperature is from the room temperature to the solvent reflux temperature. The invention hydrolyzes the tertiary tert-alkyl amine into corresponding carboxylic acids under a mild condition.

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Номер записи: 1
01-07-2009 дата публикации

Hydrolyzing method for aromatic primary amide

Номер: CN0101468947A
Автор: KE ZHANG, JINFENG XU, XINGZHU GAO, XIAN PENG, YIFENG SHI, RUJIAN MA, SHUHUI CHEN, GE LI, ZHANG KE, XU JINFENG, GAO XINGZHU, PENG XIAN, SHI YIFENG, MA RUJIAN, CHEN SHUHUI, LI GE
Принадлежит:

The invention relates to a method for hydrolyzing aromatic primary amide, which mildly hydrolyzes the aromatic primary amide into corresponding carboxylic acid. The method mainly solves the technical problems of rigorous reaction conditions and low yield in the prior art. The method adopts the technical proposal that the synthesis technology for hydrolyzing the aromatic primary amide into the carboxylic acid is as shown as follows; and the method hydrolyzes the aromatic primary amide into the corresponding carboxylic acid by reacting in a mixed solvent of trifluoroacetic acid and water. In the technology, R refers to alkyl groups or aryl groups between C1 and C20, and Ar refers to aromatic rings or aromatic hetero rings; the volume ratio of the trifluoroacetic acid to the water, namely TFA to H2O is equal to between 1:5 and 100:0; and the reaction temperature is between the room temperature and the solvent reflux temperature. The method is mainly used for hydrolyzing the aromatic primary ...

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Номер записи: 2
01-07-2009 дата публикации

Method for synthesizing substituted amino carboxylic acid by ugi reaction

Номер: CN0101468953A
Автор: KE ZHANG, JINFENG XU, XINGZHU GAO, XIAN PENG, YIFENG SHI, RUJIAN MA, SHUHUI CHEN, GE LI, ZHANG KE, XU JINFENG, GAO XINGZHU, PENG XIAN, SHI YIFENG, MA RUJIAN, CHEN SHUHUI, LI GE
Принадлежит:

The invention relates to a method for synthesizing substituted amino carboxylic acid, in particular to a method for synthesizing the substituted amino carboxylic acid by utilization of Ugi reaction. The method mainly solves the technical problems of rigorous reaction conditions and low industrialization degree in the prior synthesis method. The method adopts the technical proposal that the method adopts tert-butyl isonitrile which can be obtained by commercialization as a raw material, obtains corresponding t-butyl carboxamide through the Ugi reaction, and obtains the substituted amino carboxylic acid by mildly hydrolyzing the t-butyl carboxamide under the action of trifluoroacetic acid and water. The synthesis technology is as shown in the formula. In the technology, R, R1 and R2 refer to alkyl groups or aryl groups between C1 and C20; the volume ratio of the trifluoroacetic acid to the water in the second step, namely TFA:H2O, is between 1:5 and 100:0; and the reaction temperature is ...

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Номер записи: 3