substit相关论文
Recent progresses of late-transition metal complexes with nonsymmetric diimine ligands in ethylene p
Researches of late-transition metal complexes for ethylene polymerization and oligomerization have attracted a lot of at......
UV-Vis Spectrum and the Third-order Nonlinear Optical Properties of the Chiral Camphorderived β-dike
UV-Vis spectrum and the third-order nonlinear optical properties of the chiral camphor-derived β-diketonate have been s......
New efficient synthesis of 2,5,6-trisubstituted oxazolo[5,4-d]pyrimidi-7(6H)-ones via an oxazolylimi
A new efficient synthesis of 2,5,6-trisubstituted oxazolo(5,4-d]pyrimidi-7(6H)-ones by consecutive azaWittig reaction wa......
An efficient methodology for the synthesis of 2,3-disubstituted 3H-quinazolin-4-ones is described via one-pot three comp......
Efficient aerobic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid on Ru/C catalys
2,5-Furandicarboxylic(FDCA) is a potential substitute for petroleum-derived terephthalic acid, and aerobic oxidation of5......
The structure and properties of Mg-doped SrBi4Ti4O15(SBT) were dicussed. Mg substitution into SBT had two possibilities ......
Well-aligned and uniform Co0.8Zn0.2Fe2O4 nanofibers(NFs) are prepared by electrospinning via sol–gel and subsequent hea......
A technology for recovering indium from Jinchuan copper-smelting ash was developed. Indium in the ash was first enriched......
Objective:To analyze the effect of selected plant product against several bacterial which commonly causes oral infection......
Four complexes of the types of Cp2Ti (OOCC6H4NHPh-o)2 and Cp2TiCl2(Cp=Cp, MeCp= (CH3C5H4-)) have been investigated unde......
Abs, methylation analysis, structure, fructan 539(2R.4S)-5-Acetoxy-2,4dimethyl-pentanol, Prelog-Djerassi lactone, lipas......
The title compound 1,3,3,5,2’-pentamethylspirooxazine (I) is synthesized and identified by 1R, 1H NMR and elemental an......
This paper reports that the reaction of the propargyl bromides with aldehydes promoted by powdered lead in aqueous medi......
Reaction of C60 with DL-valine and cyclohexanone in refluxing chlorobenzene under N2 yields three [60]fulleropyrrolidin......
Synthesis and Crystal Structure of 2-Amino- 3-ethoxycarbonyl-4-(4-chlorophenyl)-4H, 5H-pyrano-[3,2-c
The title compound 2-amino-3-ethoxycarbonyl-4-(4-chlorophenyl)-4H,5H-pyrano- [3,2-c]-benzopyran-5-one (C21H16ClNO5, Mr =......
The search for environmentally benign and economic process has been the impetus for much of the research involving epoxi......
Unexpected Side Reaction in the Intermolecular N-H Insertion of Phenyl Diazoacetates with Arylamines
Unexpected side reaction is discovered from the N-H insertion of phenyl diazoacetates with arylamines in the presence of......
Further Investigation on the Rearrangement Mechanism of Reactions of 1,5-Benzothiazepines with Ethox
The reactions of 2,3-dihydro-1,5-benzothiazepines with ethoxycarbonylcarbene undergo complex rearrangements to produce r......
Two novel diphoshinoamine ligands have been synthesized. Combination of Cr(III) and methylaluminoxane(MAO) generated act......
An operationally simple and inexpensive catalyst system was developed for the cross coupling of aryl iodides and bromide......
A new trimeric linear-type furanocoumarin,rapultririn A(1),was isolated from the underground part ofHeracleum rapula.The......
Nanostructured LaFeO3 and substituted LaZnxFe1-xO3(x = 0.01,0.05,0.1,0.2,and 0.3) perovskites were synthesized by the so......
Phenyl sulfone-containing 2,3-diarylindole derivatives were designed and identified to be selective COX-2 inhibitors.A c......
环境保护行政代执行,是一项十分重要的环境行政管理制度或间接强制措施,本文通过环境保护法律法规和规章的规定,全面论述了环境保......
３－吗啉基－４－丁氧基－３－环丁烯二酮１与胺反应时，因胺的性质和反应条件不同会出现多种情况，一般情况下，酯基被胺解，胺基进入邻位如３和４．１，３－丙二胺、间氨基......
为培养学生主动学习的意识和能力,在有机化学教学中,以“官能团-取代基”模式为核心,对于每一类有机化合物,首先引导学生准确分析......
Methyl 3-trimethylsilylpropargyl carbonate reacted with dinucleophiles under the catalysis of palladium(0) complex to gi......
本文以润灵环球责任评级综合得分衡量非会计信息质量,并通过线性方程分析会计信息质量与非会计信息质量之间的相关性问题。结果表......
Organophosphonotungstic HPA of Keggin Type with Sulfo,Taurine and Glycine Substituted Ethylphosphoni
The title compounds 2a-c were synthesized and characterized for the first time.Their proton numbers are around 3.2±......
用固相反应法制备123相YBa2-xSrxCu3O7-δ(YBCO)和掺Sr的YBa2-xSrxCu3O7-δ系列超导样品．利用四端引线电阻法测量样品的电阻温度曲......
采用共沉淀法先合成出氢氧化物前驱体LiNi（0.85-x）Co0.15MnxO2,其中X=0、0.1、0.2和0.4,前驱体与Li2CO3在空气气氛中固相烧结制得正......
汉字的形体变异可以导致构形理据的变化,甚至导致构形理据的丧失。但构形理据也并非完全处于被动的地位,一方面,构形理据对形体变......
这研究描述了 Pb1x Sr x 的结构、绝缘、压电的行为[(Zr0.52Ti0.48 ) 0.95 (Mn1/3Nb2/3 ) 0.05 ] O3 陶艺(PSZT-PMN， x = 0， 0.025， 0......
为了改良六倍体小偃麦,创制携带E组染色体优良基因的普通小麦新类型。本研究利用六倍体小偃麦与克旱9号杂交选育六倍体小偃麦的衍......
用图论方法对取代〔１４〕轮烯、〔１８〕轮烯和卟吩的构造异构和构型异构体数进行计算。计算结果列表表示。......
以1′-(4-氯-2-氟-5-甲基苯基)-4′,4′,4′-三氟-1,3-丁二酮为原料, 合成了一系列具有取代苯基吡唑结构的新化合物. 化合物结构经......
家庭经营适合农业生产特点,具有较强的内部激励性和较少管理成本.从20世纪50年代中期推行的集体经营,由于其生产效率太低,70年代末......
Electrochemical performances of as-cast and annealed La0.8.xNdxMg0.2Ni3.35Al0.1Si0.05 （x = 0-0.4） al
The La-Mg-Ni-based A2B7-type La0.8-xNdxMg0.2Ni3.35 Al0.1Si0.05(x=0,0.1,0.2,0.3,and0.4) electrode alloys were prepared by......
用激光闪光光解法对室温溶液中产生的三线态二苯基卡宾进行了直接观察，并通过对产生的三线态二苯基卡宾寿命的测定以及与氧气反应速......
