搜索结果: 151-165 共查到“知识库 化学 synthesis”相关记录313条 . 查询时间(0.203 秒)
Multicomponent One-pot Diastereoselective Synthesis ofBiologically Important Scaffold under Microwaves
multi-component reaction microwave spiro derivative
2007/12/19
摘要 A simple and fast three-component diastereoselective synthesis of biologically important spiro scaffold 4 was carried out in reasonable purity starting from readily available 1H-indole-2,3-dione 1,...
A Two-coordinate Copper(I) Complex Constructed from Cyanuric acid and 4,4′-bipyridyl: Synthesis, Structure and Photoluminescence
一价铜化合物 光致发光 三聚氰酸 联吡啶
2007/12/19
摘要 通过水热法合成了一个具有很强光致发光特性的两配位一价铜化合物，Cu(bipy)(H2L)2 1 (H3L = cyanuric acid, bipy = 4,4′-bipyridyl)。化合物结构通过单晶X−射线衍射所解析。化合物具有单斜 P21/n空间群，其晶胞参数为， M = 269.71、 a = 13.4806(5) Å、 b =4.5234(2) &Arin...
摘要 Sodium tetrafluoroborate (NaBF4) was found to catalyze the electrophilic substitution reactions of indoles with aldehydes and ketones under solvent-free conditions to afford the corresponding bis(i...
An Efficient Solid Acid Promoted Synthesis of Quinoxaline Derivatives at Room Temperature
silica sulfuric aci quinoxaline 1 2-diketone 1 2-diamine enzilmonoxime
2007/12/19
摘要 Quinoxaline derivatives have been synthesized in a very short time with excellent yields by the condensation of 1,2-diamines with aliphatic or aromatic 1,2-dicarbonyl compounds or benzilmonoxime in...
A Short Synthesis of Natural Isocoumarin Glucoside Delphoside
isocoumarin glucoside glycosylation total synthesis delphoside
2007/12/19
摘要 A simple synthesis of delphoside, 3-methyl-6-hydroxy-8-O-β-D-glucopyranosyloxy isocoumarin (1), isolated from Delphinium spp. isdescribed. 3,5-Dimethoxyhomophthalic anhydride (2) on treatmentwith a...
A New Method of Synthesis of Azo Schiff Base Ligands with Azo and Azomethine Donors: Synthesis of N-4-Methoxy- benzylidene-2-(3-hydroxyphenylazo)-5-hydroxy- aniline and Its Nickel(II) Complex
synthesis azo compound Schiff base ligand azo and azomethine donor
2007/12/19
摘要 A new method for the synthesis of azo Schiff an base ligand in which the azo and azomethine groups are coordination sites was developed through a Schiff base precursor. The precursor, N-4-methoxybe...
摘要 6,8-Dimethoxy-3-[2-(4-methoxyphenyl)ethyl]isocoumarin was synthesized by condensation of 5,7-dimethoxy- hompophthalic acid with 3-(4-methoxyphenyl)propanoyl chloride. The structure of the synthesiz...
Synthesis and Characterization of Complexes of Copper(II), Nickel(II) and Cobalt(II) with vic-Dioximes Bearing N'-p-Aminobenzoyl Benzaldehyde Hydrazone
dioxime hydrazone complex extraction
2007/12/13
摘要 Six different arylhydrazone derivatives of p-aminobenzoic hydrazide of vic-dioximes were synthesized by reaction of chloroglyoxime and dichloroglyoxime with N'-p-aminobenzoyl benzaldehyde, 4-hydrox...
Kinetics of Synthesis of Isobutyl Propionate over Amberlyst-15
Esterification pseudohomogeneous kinetics isobutyl propionate ion-exchange resin Amberlyst-15
2010/4/16
The esterification of propionic acid with isobutanol in the presence of Amberlyst-15 as a catalyst was studied. Isobutyl propionate synthesized in this reaction has the fragrance of rum and is used in...
Direct Hydrothermal Synthesis of Palladium-Incorporated Silicate-Structured Mesoporous Catalysts
Mesoporous catalysts MCM-41 Pd hydrothermal synthesis reforming
2010/4/16
Pd-Si-structured novel mesoporous nanocomposite catalytic materials, having quite high Pd/Si ratios, were synthesized by an acidic direct hydrothermal synthesis route. The nanocomposite catalytic mate...
超低介电常数介孔氧化硅薄膜的制备及其表征（Synthesis of Mesoporous Thin Silica Films with Ultra Low Dielectric Constant）
TEOS蒸汽 甲基化 介孔氧化硅薄膜 超低介电常数
2010/8/24
研究了以正硅酸乙酯(TEOS)和甲基三乙氧基硅烷(MeSi(OEt)3)为混合硅源，十六烷基三甲基溴化铵(CTAB)为模板剂，采取旋涂技术，在硅晶片表面制备出二氧化硅透明薄膜，再经过正硅酸乙酯(TEOS)蒸汽孔壁强化后采用线性升温焙烧法脱除薄膜孔道内的模板剂，制备出具有超低介电性能的氧化硅薄膜。使用FTIR、XRD和SEM对样品进行了结构表征，并采用阻抗分析仪测量了薄膜的介电常数(k)，纳米硬度计...
Synthesis and Cytotoxic Activity of Platinum(II) and Platinum(IV) Complexes with 2-Hydroxymethylbenzimidazole or 5(6)-Chloro-2-hydroxymethylbenzimidazole Ligands against MCF-7 and HeLa Cell Lines
Benzimidazole, cytotoxic activity, HeLa cell line, MCF-7 cell line, platinum(IV) complexes, platinum(II) complexes
2010/4/16
Four platinum(II) and 4 platinum(IV) complexes with the structures [PtL2Cl2], [PtL2I2], [PtL2Cl4], and [PtL2Cl2(OH)2] (L = 5(6)-non/orchloro-substituted-2-hydroxymethylbenzimidazole ligands as ``non-l...
The Synthesis of 2-(Chloromethyl)-6-Hydroxy-2H-Pyran-3 (6H)-one via Achmatowicz Rearrangement
Oxidation furan 2-chloro-1-(furan-2-yl) ethanol m-CPBA rearrangement pyranones
2010/4/16
Achmatowicz rearrangement was carried out with 2-chloro-1-(furan-2-yl) ethanol, which was synthesized starting from 1-(furan-2-yl) ethanone. It was shown that the oxidation of 2-chloro-1-(furan-2-yl) ...
N,N`-Bis(1`-hydroxy-2`-acetonaphthone)propylenediamine: Synthesis, Extractive Properties, and Use as an Ionophore in a Cu(II)-Selective Potentiometric Sensor
propylenediamine Synthesis, Extractive Properties Use as an Ionophore Selective Potentiometric Sensor
2010/4/16
The binding ability of N,N'-bis(1'-hydroxy-2'-acetonaphthone)propylenediimine (H2L) towards metal ions was investigated by performing liquid-liquid extraction experiments to extract Cu2+, Ni2+, Co2+, ...
题目：S14-1 Integrating steroid synthesis with steroid action: multiple mechanisms in birds
作者：Barney A. SCHLINGER, Kiran K. SOMA, Sarah E. LONDON