搜索结果: 121-135 共查到“知识库 有机合成化学”相关记录1973条 . 查询时间(0.656 秒)
以N甲基咪唑为原料,经过两步硝化反应得到1甲基2,4,5三硝基咪唑（MTNI），并用红外光谱、核磁共振、元素分析对其结构进行了表征。研究了发烟硝酸与发烟硫酸的体积比、加料顺序、反应时间、温度对1甲基2，4二硝基咪唑(2,4MDNI)和MTNI收率的影响。结果表明,当一段硝化采用正加法加料, 发烟硝酸与发烟硫酸的体积比1∶2,二段硝化采用反加法加料, 发烟硝酸与发烟硫酸的体积比1∶4...
以α-蒎烯为原料合成2,6-二氯莰烷,再以2,6-二氯莰烷为原料合成冰片二烯。α-蒎烯合成2,6-二氯莰烷反应,当α-蒎烯和NaHCO3的物质的量之比为1:1时,控制温度-10℃,反应 7h 后,2,6-二氯莰烷的得率最高。2,6-二氯莰烷合成冰片二烯的工艺条件为,以叔丁醇钾为消除反应试剂,2,6-二氯莰烷与叔丁醇钾的物质的量之比为1:4, 二甲基甲酰胺(DMF)为溶剂、反应温度 120℃、反应时...
Synthesis and Biological Activity of 4-(4-Hydroxybenzylidene)-2- (substituted styryl) oxazol-5-ones and Their o-glucosides
Oxazolone a -acetobromoglucose decetylation o-glucosides antimicrobial antifungal activity
2010/4/9
The 4-(4-hydroxybenzylidene)-2-methyl oxazol-5-ones 1 were treated with various aldehydes in the presence of acetic acid to form 4-(4-hydroxybenzylidene)-2-(substituted styryl) oxazol-5-ones 2a-i, whi...
Development of Alumina Supported Alkaline Catalysts Used for Biodiesel Production
Biodiesel canola oil heterogeneous catalyst Al2O3 supported catalysts
2010/4/9
The transesterification of canola oil with methanol was studied in a heterogeneous system, using g-Al2O3 supported alkaline catalysts. All the catalysts were prepared by incipient-wetness impregnation...
Synthesis of 5-Arylamino-1H (2H)-tetrazoles and 5-Amino-1-aryl-1H-tetrazoles from Secondary Arylcyanamides in Glacial Acetic Acid: A Simple and Efficient Method
5-Arylamino-1H (2H)-tetrazoles 5-amino-1-aryl-1H-tetrazoles arylcyanamides guanyl azides glacial acetic acid
2010/4/9
A simple and efficient method for the preparation of 5-arylamino-1H (2H)-tetrazoles (3a-i) and 5-amino-1-ary-1H-tetrazoles (4a-i), with excellent yields and high purity, from secondary arylcyanamides ...
Synthesis, Spectral Characterization, and Antimicrobial Activity of Arsenic(III) and Bismuth(III) tri[3(2´-hydroxyphenyl)-5-(4-subsituted phenyl)pyrazolinates]
Arsenic Bismuth Pyrazolinates Antimicrobial activity
2010/4/9
Arsenic(III) tripyrazolinates and bismuth(III) tripyrazolinates of the type M(C15H12N2OX)3 [where C15H12N2OX = 3(2'-hydroxyphenyl)-5-(4-substituted phenyl)pyrazoline] have been synthesized by the reac...
Water-Gas Shift Reaction over Bimetallic Pt-Ni/Al2O3 Catalysts
Water-gas shift Pt-Ni CO removal high temperature shift (HTS)
2010/4/9
The water-gas shift (WGS) activity of bimetallic Pt-Ni/Al2O3 catalysts was investigated in the temperature range 200-450 °C using an idealized feed composition consisting of 3% CO and 6%-10% H2O. The ...
The Role of the Entropy Factor on the Adsorption of an Optical Brightener on Pulp
Optical brighteners pulp adsorption entropy non-homogeneity
2010/4/9
The present paper reports results of the thermodynamic study of adsorption of 2 optical brighteners (Tinopal UP and Leucophor AP) on pulp. The entropy non-homogeneity of the pulp surface was confirmed...
The Effect of Electrocatalytic Activity and Crystal Structure of PbO2 Surfaces on Polyphenylene Oxide (PPO) Production in Acetonitrile
a-PbO2 b -PbO2 phenol electrocatalysis PPO
2010/4/9
The crystallographic nature of PbO2 films was changed by optimizing the electrolysis conditions in an electrodeposition solution of PbO2. These PbO2 films were then used to prepare PPO films. It was d...
The Effect of Electrocatalytic Activity and Crystal Structure of PbO2 Surfaces on Polyphenylene Oxide (PPO) Production in Acetonitrile
a-PbO2 b -PbO2 phenol electrocatalysis PPO
2010/4/9
The crystallographic nature of PbO2 films was changed by optimizing the electrolysis conditions in an electrodeposition solution of PbO2. These PbO2 films were then used to prepare PPO films. It was d...
Rapid Synthesis of New Poly(amide-imide)s Based on N-(4-Carboxy phenyl) trimellitimide and Hydantoin Derivatives under Microwave Irradiation
Thermally stable polymers icrowave irradiation Poly (amide-imide Hydantoin derivatives
2010/4/9
Six new poly (amide-imide)s (6a-f) were prepared under microwave irradiation by polycondensation reaction of diacid chloride (4) with 6 different derivatives of hydantoins (5a-f) using O-cresol as a m...
Mild and Efficient Iodination of Aromatic Compounds with Trichloroisocyanuric Acid/I2/Wet SiO2 System
Iodination trichloroisocyanuric acid aromatic compound wet SiO2
2010/4/9
Iodoarenes can be obtained using trichloroisocyanuric acid/I2/wet SiO2 system at room temperature with high yield in CH2Cl2.
A Convenient Synthesis of 2-Azido and 2-Thiocyanato-2,3-Unsaturated Cyclic Ketones
Azides thiocyanates enols deoxygenation 1,2-cyclic diketones
2010/4/9
2-Azido and 2-thiocyanato-2,3-unsaturated ketones were synthesized by utilizing functionalization of 5- or 6-membered cycloalkane-1,2-diones, namely diosphenols, with dimethylthiocarbomoyl chloride, w...
Synthesis and Leishmanicidal Evaluation of Novel 4-Substituted-2,2-Dimethyl-7-(prop-2-ynyloxy)Chromenes
Synthesis chromene leishmanicidal activity
2010/4/9
Substituted 4-chromenes were synthesized via the Grignard coupling reaction of various substituted phenyl- and benzylmagnesium chlorides with 2,2-dimethyl-7-(prop-2-ynyloxy)chroman-4-one (1) in relati...
CTAB-Assisted Hydrothermal Synthesis and Magnetic Characterization of NixCo1-xFe2O4 Nanoparticles (x = 0.0, 0.6, 1.0)
Magnetic materials Spinels XRD Coercivity Hydrothermal synthesis
2010/4/9
Nickel ferrite, NixCo1-xFe2O4, NPs (where x = 0.0, 0.6 and 1.0) were successfully synthesized by a rapid and reproducible CTAB-assisted hydrothermal route. The influence of different hydrolyzing agent...