搜索结果: 1-11 共查到“有机化学 Silica”相关记录11条 . 查询时间(0.036 秒)
Friedel-Crafts acylation of arenes with carboxylic acids using silica gel supported AlCl3
Acylation aluminium trichloride ketones silica gel
2010/10/19
Aromatic compounds react smoothly with carboxylic acids in the presence of silica gel supported aluminium trichloride to afford the corresponding ketones with high regioselectivity in high to excellen...
Sulfonic acid-functionalized silica: a remarkably efficient heterogeneous reusable catalyst for the one-pot synthesis of 1,4-dihydropyridines
1,4-Dihydropyridine b-dicarbonyl compounds solid acid SiO2-R-SO3H
2010/10/19
An efficient one-pot method for the synthesis of 1,4-dihydropyridines from b-dicarbonyl compounds, aldehyde, and ammonium acetate is reported using sulfonic acid-functionalized silica at 90 °C under s...
Silica supported polyphosphoric acid (PPA-SiO2): an efficient and reusable heterogeneous catalyst for the one-pot synthesis of a -amino phosphonates
a -Amino phosphonates PPA-SiO2 heterogeneous catalyst
2010/10/19
An efficient green protocol is described for the preparation of a -amino phosphonates, employing a one-pot three-component condensation reaction between aldehydes, amines, and trialkyl phosphites in t...
Direct reductive amination of carbonyl compounds using sodium borohydride-silica chloride
Reductive amination silica chloride sodium borohydride
2010/10/15
A simple and convenient procedure for reductive amination of aldehydes and ketones using sodium borohydride in the presence of silica chloride as an active, inexpensive, recoverable, and recyclable ca...
H2{SO}4-silica as an efficient and chemoselective catalyst for the synthesis of acylal from aldehydes under solvent-free conditions
Acylals aldehydes catalysis solvent-free reactions
2010/4/9
A variety of aldehydes react with acetic anhydride in the presence of a catalytic amount of H2SO4-silica to afford the corresponding 1,1-diacetates (acylals) in excellent yields. Ketones are not affec...
A Convenient and Efficient Synthesis of N-Acylsulfonamides in the Presence of Silica Phosphoric Acid under Heterogeneous and Solvent-Free Conditions
N-acylsulfonamide solvent-free silica phosphoric acid heterogeneous condition N-acylation
2010/4/8
Reaction of sulfonamides with carboxylic acid anhydrides and chlorides in the presence of silica phosphoric acid provided N-acyl sulfonamides in good to high yields. All reactions were performed under...
专著信息
书名
Synthesis of mesoporous silica by templating of amphiphilic diblock copolymer under neutral condition
语种
英文
撰写或编译
撰写
作者
X. G Cui,W. J Cho,C. S. Ha
第一作者单位
延边大学
出版社
Molecular Crystals and Liquid...
专著信息
书名
Polypropylene glycol as a swelling agent for the synthesis of mesoporous silica (SBA-15) by amphiphilic block copolymer templating
语种
英文
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撰写
作者
X. G Cui,J. H. Ahn,W. C. Zin,W. J Cho,C. S....
专著信息
书名
Synthesis of mesoporous silica by poly(ethylene glycol) -block-poly(propylene glycol)- block-poly(ethylene glycol)
语种
英文
撰写或编译
撰写
作者
X. G Cui,G. H. Yoo,W. J Cho,C. S. Ha
第一作者单位
延边大学
出版社
Molecu...
期刊信息
篇名
Influence of RE Addition on the Synthesis Mechanism of Si3N4 from silica Reduction by Carbon in Nitrogen Atmosphere
语种
英文
撰写或编译
作者
LI Wenchao,Zhuang Youqing,Sun Guiru
第一作者单位
刊物名称
J.of Rare Ear...
Solid Phase Extraction of Copper(II) by Modified Octadecyl Silica Membrane Disks with 3-{2-[2-(2-Hydroxyimino-1-methyl-propylideneamino)- ethylamino]-ethyl-imino}-butan-2-one~Oxime
Copper solid phase extraction ultratrace elements silica membrane
2010/4/21
A simple, selective and rapid method for determining trace amounts of copper(II) ions in various types of water samples using atomic absorption spectrophotometry was investigated. Copper(II) ions fro...