Настройки

Укажите год
-

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

Подробнее
-

Мониторинг СМИ

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

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 4. Отображено 4.
04-07-2023 дата публикации

Preparation method of glufosinate-ammonium

Номер: CN116375764A
Автор: TANG WENJIE, WU CHENGJUN, LI NAN, TANG XIANZHONG, XU KAIKAI, XU JIANJIE, MAO CHUNHUI
Принадлежит:

The invention relates to a preparation method of glufosinate-ammonium. Specifically, the invention relates to a method for preparing glufosinate-ammonium represented by a formula (I) or a salt thereof, an enantiomer or a mixture of enantiomers in any proportion, which comprises the following steps of: reacting a compound represented by a formula (II) or a salt thereof, an enantiomer or a mixture of enantiomers in any proportion with an alcohol compound or a phenolic compound, and hydrolyzing the reaction product after separating by-products to obtain the compound of the formula (I). The byproduct is separated through a simple separation process, the recovery rate can reach 90% or above, and the obtained byproduct can be sold or recycled after being further purified, so that the cost of raw materials is greatly reduced, and the emission of three wastes is reduced. In addition, by-products can be separated and recycled before hydrolysis, so that the separation and purification difficulty ...

Подробнее
Номер записи: 1
15-12-2004 дата публикации

具有杀菌活性的含硫不饱和肟醚类化合物及其制备方法

Номер: CN0001179942C
Автор: MAO CHUNHUI, WANG XIAOGUANG, HUANG MINGZHI, CHUNHUI MAO, XIAOGUANG WANG, MINGZHI HUANG, 毛春晖
Принадлежит:

... 本发明公开了通式(I)所示的具有杀菌活性的含硫不饱和肟醚类化合物及其制备方法。通式(I)中A是氢，卤素，氰基，烷基，烷氧基，卤代烷基，卤代烷氧基；X是CH或N；Y是O，S，NR#-[6]；R#-[1]，R#-[6]是H或烷基；R#-[2]，R#-[3]，R#-[4]，及R#-[5]分别是氢，卤素，任意取代的烷基，任意取代的烷氧基，任意取代的烯基，任意取代的炔基，任意取代的芳基，任意取代的杂芳基。n是0，1或2。∴ ...

Подробнее
Номер записи: 2
25-07-2023 дата публикации

Preparation method of glufosinate-ammonium

Номер: CN116478207A
Автор: TANG WENJIE, WU CHENGJUN, LI NAN, TANG XIANZHONG, XU KAIKAI, XU JIANJIE, MAO CHUNHUI
Принадлежит:

The invention relates to a preparation method of glufosinate-ammonium. Specifically, the invention relates to a method for preparing glufosinate-ammonium represented by a formula (I) or a salt thereof, an enantiomer or a mixture of enantiomers in any proportion, which comprises the following steps: reacting a compound of a formula (II) with a compound of a formula (III), and hydrolyzing the reaction product to obtain the compound of the formula (I). According to the method disclosed by the invention, the reaction activity of the substrate is higher, so that the construction condition of a P-C bond is milder, the reaction temperature is lower, and the racemization of an L-configuration at high temperature can be reduced, thereby improving the maintenance of the L-configuration during the preparation of the L-glufosinate-ammonium.

Подробнее
Номер записи: 3
02-05-2023 дата публикации

Preparation method of glufosinate-ammonium

Номер: CN116041387A
Автор: TANG WENJIE, WU CHENGJUN, LI NAN, XU JIANJIE, TANG XIANZHONG, MAO CHUNHUI
Принадлежит:

The invention relates to a preparation method of glufosinate-ammonium. Specifically, the invention relates to a method for preparing glufosinate-ammonium represented by a formula (I) or a salt thereof, an enantiomer or a mixture of enantiomers in any proportion, which comprises the following steps: hydrolyzing a compound of a formula (III) to obtain the compound of the formula (I). According to the method, due to different reaction mechanisms, halogenated hydrocarbon byproducts in the Michaelis-Arbuzov reaction can be avoided, the destructive effect of the halogenated hydrocarbon byproducts on ozone in the atmosphere is prevented, correspondingly, equipment and engineering investment for separation, purification, collection and the like of the byproducts are also omitted, and potential environment and safety risks caused by the byproducts are also avoided.

Подробнее
Номер записи: 4