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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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Применить Всего найдено 3. Отображено 3.
15-06-2011 дата публикации

Preparation method of 2-O-ethoxyl-D-glucose

Номер: CN0102093439A
Автор: YING FU, YANSHOU YANG, YAOJUAN CHEN, HONGXIA HOU, FU YING, YANG YANSHOU, CHEN YAOJUAN, HOU HONGXIA
Принадлежит:

The invention provides a preparation method of 2-O-ethoxyl-D-glucose, belonging to the technical field of chemical synthesis. The method comprises the following steps of: carrying out glucoside treatment on merchant D-glucose, and protecting 4,6-site hydroxyl groups with benzaldehyde; and then selectively carrying out nucleophilic substitution and hydrolysis with 2-bromoethanol pyran ether to synthesize the 2-O-ethoxyl-D-glucose. The method has the advantages of low cost and easiness of obtaining raw materials, moderate reaction condition, fewer synthesis steps, high productivity, convenience for operation, and the like.

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Номер записи: 1
20-10-2010 дата публикации

N,N-bissubstituted-O-trialkyl silicon-based hydroxylamine compound and preparation thereof

Номер: CN0101863915A
Автор: CHEN YAOJUAN, FU YING, LI JIAO, LIU YANHUA, YANG YANSHOU, ZHANG HUAIYUAN, YAOJUAN CHEN, YING FU, JIAO LI, YANHUA LIU, YANSHOU YANG, HUAIYUAN ZHANG
Принадлежит:

The invention provides a novel hydroxylamine compound, i.e. N,N-bissubstituted-O-trialkyl silicon-based hydroxylamine compound, belonging to the technical field of chemical synthesis. The compound is prepared by the steps of: firstly, reacting nitryl hydrocarbon materials in an ammonium chloride water solution with zinc powder to generate N-alkyl hydroxylamine; secondly, reacting the N-alkyl hydroxylamine with an aldehydes compound in organic solvent to generate nitrone; and thirdly, reacting the nitrone with organic metal reagent in the promotion of trialkyl silicon haloganide. The N,N-bissubstituted-O-trialkyl silicon-based hydroxylamine compound can remove silicon base to obtain the hydroxylamine compound, and the hydroxylamine compound is reduced to obtain an amine compound. The preparation method of the N,N-bissubstituted-O-trialkyl silicon-based hydroxylamine compound has the advantages of easily obtained and low cost raw materials, mild reaction condition, high yield, convenient ...

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Номер записи: 2
15-06-2011 дата публикации

Chalcone-containing acylthiourea compounds and preparation method and use thereof

Номер: CN0102093274A
Автор: YING FU, CAIQIN XIAO, YANSHOU YANG, YAOJUAN CHEN, KANGQING CAI, LIANG AN, FU YING, XIAO CAIQIN, YANG YANSHOU, CHEN YAOJUAN, CAI KANGQING, AN LIANG
Принадлежит:

The invention provides chalcone-containing acylthiourea compounds and a preparation method and use thereof and belongs to the technical field of chemical synthesis. The compounds are prepared by reacting acyl chloride with ammonium thiocyanate in the presence of a phase transfer catalyst in a protonic solvent to obtain acylisosulfocyante, reacting acylisosulfocyante with aminoacetophenone to obtain N-benzoyl-N'-acetylphenylthiourea, and performing condensation of N-benzoyl-N'-acetylphenylthiourea and aromatic aldehydes under an alkaline condition to obtain target compounds. The chalcone-containing acylthiourea compounds prepared by the invention have carbonyl, vinyl, acyl and thiourea functional groups and belong to bioactive materials having multiple functional groups. Initial bioactivity tests show that the materials have regulating effect on the growth of dicotyledonous rape seeds.

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Номер записи: 3