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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 6. Отображено 6.
16-09-2009 дата публикации

Method for preparing levamlodipine from racemic amlodipine maleate

Номер: CN0101531629A
Автор: LIU YONGHUI, ZHANG LIANDI, DING LEI, HE QINFEI, YONGHUI LIU, LIANDI ZHANG, LEI DING, QINFEI HE
Принадлежит:

The invention relates to a method for removing maleate of amlodipine maleate, which prepares free base of amlodipine from weak inorganic base, DMF and water as solvent by a settling method. The invention relates to a method for preparing levamlodipine from the amlodipine, which removes dextroisomer through salifying precipitation by using mixed solvent of N, N-dimethylformamide and ethanol and D(-)tartaric acid taken as a chiral reagent, and prepares the levamlodipine through precipitation by adding excessive water. The levamlodipine can be used for preparing levamlodipine besylate.

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Номер записи: 1
23-09-2009 дата публикации

Ruthenium-chiral diphosphine ligand complex, preparation method of same, and use of same in catalytic hydrogenation of beta-carbonyl methyl myristate

Номер: CN0101538285A
Автор: QIN YONG, HE QINFEI, YANG ENPING, SONG HAO, XU TIANSHUAI, DENG XIANGLIN, WANG XIAOLIN, YONG QIN, QINFEI HE, ENPING YANG, HAO SONG, TIANSHUAI XU, XIANGLIN DENG, XIAOLIN WANG
Принадлежит:

The invention discloses a ruthenium-chiral diphosphine ligand complex catalyst and a preparation method of the same. The ruthenium-chiral diphosphine ligand complex catalyst is prepared by starting from a chiral phosphine ligand of 6,6'- dimethoxy-2,2'-bis(biarylphosphino)-1,1'-phenyl benzene and by further reactions of the chiral phosphine ligand of 6,6'- dimethoxy-2,2'-bis(biarylphosphino)-1,1'-phenyl benzene and a (cyclooctadiene) and ruthenium dichloride complex and Et3N. The catalyst has good catalytic effect.

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Номер записи: 2
20-02-2008 дата публикации

Preparation method for alendronic acid

Номер: CN0101125863A
Автор: SHEN RUEN, KONG JIALANG, TAO JIYANG, HE QINFEI, RUEN SHEN, JIALANG KONG, JIYANG TAO, QINFEI HE
Принадлежит:

The invention provides a novel preparation method of alendronic acid, pertaining to medicine and chemical technical field. The method solves the run-away safety hidden trouble caused by self-putting heat flush materials in the existing preparation method of alendronic acid. The novel preparation method of the alendronic acid comprises the steps: (1) 2-pyrrolidone is added in acidic aqueous solution, thus obtaining Gamma -aminobutyrate after reaction; (2) the Gamma -aminobutyrate system that is obtained from reaction is added into organic solvent of 2-pyrrolidone, and phosphorus tricholoride is added; (3) water is added in the reaction system to lower the temperature, remove organic horizon, and aqueous layer reflows, and active carbon is added to decolor, the solution is added in alcohol solution to be crystallized after filtration and concentration, thus obtaining alendronic acid through filtration and drying. The novel preparation method of the alendronic acid has the advantages of low ...

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Номер записи: 3
27-07-2011 дата публикации

Preparation method for alendronic acid

Номер: CN0101125863B
Автор: KONG JIALANG, HE QINFEI, SHEN RUEN, TAO JIYANG, JIALANG KONG, QINFEI HE, RUEN SHEN, JIYANG TAO
Принадлежит:

The invention provides a novel preparation method of alendronic acid, pertaining to medicine and chemical technical field. The method solves the run-away safety hidden trouble caused by self-putting heat flush materials in the existing preparation method of alendronic acid. The novel preparation method of the alendronic acid comprises the steps: (1) 2-pyrrolidone is added in acidic aqueous solution, thus obtaining Gamma -aminobutyrate after reaction; (2) the Gamma -aminobutyrate system that is obtained from reaction is added into organic solvent of 2-pyrrolidone, and phosphorus tricholoride is added; (3) water is added in the reaction system to lower the temperature, remove organic horizon, and aqueous layer reflows, and active carbon is added to decolor, the solution is added in alcohol solution to be crystallized after filtration and concentration, thus obtaining alendronic acid through filtration and drying. The novel preparation method of the alendronic acid has the advantages of low ...

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Номер записи: 4
29-12-2010 дата публикации

Method for preparing levamlodipine from racemic amlodipine maleate

Номер: CN0101531629B
Автор: LEI DING, YONGHUI LIU, LIANDI ZHANG, QINFEI HE, DING LEI, LIU YONGHUI, ZHANG LIANDI, HE QINFEI
Принадлежит:

The invention relates to a method for removing maleate of amlodipine maleate, which prepares free base of amlodipine from weak inorganic base, DMF and water as solvent by a settling method. The invention relates to a method for preparing levamlodipine from the amlodipine, which removes dextroisomer through salifying precipitation by using mixed solvent of N, N-dimethylformamide and ethanol and D(-)tartaric acid taken as a chiral reagent, and prepares the levamlodipine through precipitation by adding excessive water. The levamlodipine can be used for preparing levamlodipine besylate.

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Номер записи: 5
22-08-2012 дата публикации

Method for culturing teak seedlings by spike culture and rapid propagation in container

Номер: CN0102204489B
Автор: YUHUA PENG, HAIKUN HAO, YANYUN CAO, ZHILING HUANG, WENHUI SHEN, QINFEI HE, PENG YUHUA, HAO HAIKUN, CAO YANYUN, HUANG ZHILING, SHEN WENHUI, HE QINFEI
Принадлежит:

The invention discloses a method for culturing teak seedlings by spike culture and rapid propagation in containers. High-quality single teak seeds are used as the parent plants; when growing to 4 to 5 centimeters high, the seedlings sown on a sand bed are transplanted into a parent plant containing cup filled with nutrient substrate, and placed on a lifting seedling culturing bed to be cultured; when the diameter of each parent plant is larger than 0.3 centimeter, the parent plant is cut off from the part 10 to 15 centimeters far from the basic part to promote side branches to germinate; whenthe seedlings are semi-lignified, side branches are cut off, used as cuttings, inserted into a cutting containing cup filled with substrate and placed on the lifting seedling culturing bed to be cultured; therefore, a large amount of high-quality teak seedlings maintaining the excellent hereditary characters of the parent plants can be propagated rapidly in a short time, and the success rate of cottage ...

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Номер записи: 6