N^4—取代缩氨基硫脲衍生物的合成

以Ｎ４－取代氨基硫脲与尿嘧啶－１－乙醛反应，合成了６种Ｎ４－取代氨基硫脲衍生物，并进行了抗菌活性测试。结果表明，当Ｎ４－取代基为对氯苯基（Ⅲ６）时，具有较高的抑制枯草杆菌活性，对八叠球菌、白色念珠菌、黄曲霉菌亦有一定活性。     

N—取代三氯乙酰胺合成N,N“—多亚甲基双（N‘—（4—氯苯基）脲

通过Ｎ－取代三氯乙酰胺与不同的脂肪二胺反应，合成了５种新的Ｎ，Ｎ”－多亚甲基双（Ｎ’－（４－氯苯基）脲（ＡｒＮＨＣＯＮＨ（ＣＨ２）ｎＮＨＣＯＮＨＡｒ，ｎ＝２～６，Ａｒ＝４－ＣｌＣ６Ｈ４）其结构经元素分析，ＨＮＭＲ和ＩＲ证实。     

反相高效液相色谱法测定光诱导反应产物N-(α-萘基)咔唑和N-(β-萘基)咔唑含量

报道了以Ｗａｔｅｒｓ ＢｏｎｄａｐａｋＴＭ，ＯＤＳ—Ｃ１８为色谱柱，甲醇：四氢呋喃：水（７２：６：２２，Ｖ／Ｖ为 流动相，在ＵＶ２５４ｎｍ为测定波长的条件下，利用外标法定量，建立了反相高效液相色谱法测 定光诱导反应粗产物中Ｎ－（α－萘基）咔唑和Ｎ－（β－萘基）咔唑的方法。为光诱导自由基链式亲 核取代反应（ＳＲＮ１）反应机理的探讨提供了可靠的理论依据。     

铜(Ⅱ)-1,4,8,11-四氮杂环十四烷-12,14-二酮-α-氨基酸(5-取代邻菲咯啉)三元配合物的稳定性

本文采用ｐＨ法，在２５．０±０．１℃，Ｉ＝０．１ｍｏｌ·ｄｍ－３ＫＮＯ３存在条件下，测定了铜（Ⅱ）－１，４，８，１１－四氮杂环十四烷－１２，１４－二酮－α－氨基酸（５－取代邻菲咯啉）三元配合物的稳定常数，探讨了大环多胺配体与金属离子的配位能力、配位方式、及其在水溶液中铜（Ⅱ）配合物的稳定性，同时也研究了５－取代邻菲咯啉与铜（Ⅱ）之间的ｄ－ｐ反馈π键，取代基的Ｈａｍｍｅｔ诱导效应对三元配合物稳定性的影响。     

Lewis酸催化1,4-脱水-2,3-二-氧-(对迭氮基苯甲基)-α-D-核糖的选择性开环聚合反应

在低温下用三氟化硼乙醚催化１，４－脱水－２，３－二－氧－（对迭氮基苯甲基）－α－Ｄ－核糖（ＡＤＡＢＲ）的阳离子选择性开环聚合反应，首次合成了具有１，５－开环α－结构的聚合物。单体ＡＤＡＢＲ由１，４－脱水－α－Ｄ－核糖在ＤＭＦ溶剂中与对溴甲基迭氮基苯反应获得。聚合物的结构由比旋光度、１Ｈ－ＮＭＲ和１３Ｃ－ＮＭＲ及ＩＲ谱确认。用五氟化锑为催化剂则得到了同时含有α－呋喃单元和β－吡喃单元混合结构的聚合物。研究了催化剂及其用量、聚合反应时间对聚合反应的影响，讨论了聚合反应机理。为研究１，４－脱水－２，３－二－氧－（对迭氮基苯甲基）－α－Ｄ－吡喃核糖的聚合活性以及便于测试迭氮基的含量对聚合物光刻性能的影响，还初步研究了单体ＡＤＡＢＲ与１，４－脱水－２，３－二－氧－苯甲基－α－Ｄ－吡喃核糖（ＡＤＢＲ）的共聚反应。从共聚物的结构分析可以认定共聚物具有１，５－α－结构，并且单体１，４－脱水－２，３－二－氧－苯甲基－α－Ｄ－吡喃核糖在实验条件下具有较高的活性。     

N－取代三氯乙酰胺合成N，N″－多亚甲基双［N′－（4－氯苯基）］脲

通过Ｎ－取代三氯乙酰胺与不同的脂肪二胺反应，合成了５种新的Ｎ，Ｎ″－多亚甲基双［Ｎ′－（４－氯苯基）］脲［ＡｒＮＨＣＯＮＨ（ＣＨ２）ｎＮＨＣＯＮＨＡｒ，ｎ＝２～６，Ａｒ＝４－ＣｌＣ６Ｈ４］，其结构经元素分析、１ＨＮＭＲ和ＩＲ证实     

N,N′-二(芳磺酰)亚磺酰胺-S-(2-苯并咪唑)钠作为稳定剂的研究

研究了新型感光稳定剂Ｎ，Ｎ′－二（芳磺酰）亚磺酰胺－Ｓ－（２－苯并咪唑）钠（芳磺酰基为苯磺酰，对甲苯磺酰，对氯苯磺酰）与增感染料在实用照相乳剂中的超增感与防灰雾作用。实验结果表明，在多种不同组分的卤化银乳剂中，可提高感光度，抑制灰雾或对感光度和灰雾具有一致的理想效果。     

含硅香原料研究(VI)－顺(反)-1-取代-3-三甲硅基环己醇的合成、13C NMR谱及其香气评定

合成并分离得到７对１－取代－３－三甲硅基环己醇的顺、反异构体,它们的结构通过＾Ｈ ＮＭＲ、＾１３Ｃ ＮＭＲ、ＭＳ谱及ＧＣ（测其纯度）测定,利用＾１３Ｃ ＮＭＲ确定了各对顺、反异构体的构型。评定了各化合物的香气,大部化合的具有甜香或甜香与木香香气,其中（反）－１－正丁基－３－三甲硅基环己醇具有甜香和木香香气,香气透发,留香持久,质量上乘。     

含1-(2-甲氧乙基)茚基和二(三甲硅基)胺基的稀土有机配合物的合成和表征

无水三氯化稀土（ＬｎＣｌ３），二（三甲硅基）胺基钾（ＬｉＮ（ＳｉＭｅ３）２〗及１－（２－甲乙基）茚室温上在四氢呋喃溶剂中反应，得到了４个含１－（２－甲氧乙基）茚基和二（三甲硅基）胺基的稀土金属有机物｛（Ｃ９Ｈ６ＣＨ２Ｃ２ＯＭｅ）Ｌｎ〖Ｎ（ＳｉＭｅ３）２〗２（Ｌｎ＝Ｎｄ，Ｓｍ，Ｄｙ，Ｙｂ）｝，这些配合物均经元素分析、ＩＲ和ＭＳ表征。     

二安替比林基氯代苯基甲烷与钒（Ⅴ）显色反应的研究

合成了二安替比林－邻氯苯基甲烷（ＤＡｏＣＭ），二安替比林－间氯苯基甲烷（ＤＡｍＣＭ），二安替比林－２，４－二氯苯基甲烷（ＤＡＤＣＭ）三个新试剂。研究了它们与钒（Ⅴ）的显色反应，得到了一些取代基位置对试剂性能影响的规律。建立了三个光度法测定微量钒的新方法。     

Reaction of (R)-(-)-2-aminomethylpyrrolidine(1,1-cyclobutanedicarboxylato)platinum( II) with guanosine

The reaction of a new antitumor platinum complex, (R)-(-)-2-aminomethylpyrrolidine(1,1-cyclobutanedicarboxylato++ +)platinum(II) (1) with guanosine at room temperature in an aqueous solution was followed by proton nuclear magnetic resonance (1H-NMR) spectroscopy and high performance liquid chromatography (HPLC) at intervals. Both techniques showed that a new compound was formed by displacement of the 1,1-cyclobutanedicarboxylate moiety of 1 with two guanosines, and its 1H-NMR spectrum and HPLC chromatogram were proved to be identical with those of [(R)-(-)-2-aminomethylpyrrolidine]bis(N7-guanosine)platinum(II) (2), which was obtained upon successive treatment of (R)-(-)-2-aminomethylpyrrolidinedichloroplatinum(II) (3) with AgNO3 and 2 mol eq of guanosine in water. The binding sites of the platinum to the two guanosine moieties in 2 were confirmed by the pH dependence of the two G-H8 signals.     

Determination of (S)-(-)-cathinone and its metabolites (R,S)-(-)-norephedrine and (R,R)-(-)-norpseudoephedrine in urine by high-performance liquid chromatography with photodiode-array detection.

A high-performance liquid chromatographic (HPLC) procedure with photodiode-array detection (DAD) is described for the determination of (S)-(-)-cathinone (S-CA) and its metabolites (R,S)-(-)-norephedrine (R-NE) and (R,R)-(-)-norpseudoephedrine (R-NPE) in urine. Extraction and clean-up of 1-ml urine samples were performed on a cyano-bonded solid-phase column using (+/-)-amphetamine as internal standard. The concentrated extracts were separated on a 3-microns ODS-1 column with acetonitrile-water-phosphoric acid-hexylamine as the mobile phase. Peak detection was done at 192 nm. The detection limits for S-CA and R-NE/R-NPE in urine were 50 and 25 ng/ml, respectively. The differentiation of the enantiomers of cathinone and norephedrine was achieved by derivatization with (S)-(-)-1-phenylethyl isocyanate to the corresponding diastereomers followed by HPLC-DAD on a 5-microns normal-phase column. The R and S enantiomers of norpseudoephedrine were determined by gas chromatography-mass spectrometry after on-column derivatization with (S)-(-)-N-trifluoroacetylprolyl chloride. Following a single oral dose of 0.5 mg/kg of S-CA, the concentrations found in urine ranged from 0.2 to 3.8 micrograms/ml of S-CA, from 7.2 to 46.0 micrograms/ml of R-NE and from 0.5 to 2.5 micrograms/ml of R-NPE.     

Smectic A and smectic C materials: partially deuteriated chiral liquid crystals (S)-(-)-2-methylbuty 4-(4-(d13)-hexyloxyphenyl)benzoate and (S)-(-)-2-methylbutyl 4-(4-(d17)-octyloxyphenyl)benzoate

In order to study the difference in microscopic orientation of ferro- and antiferroelectric liquid crystalline molecules, we synthesized the partially deuteriated chiral compounds, (S)-(^-)-2-methylbutyl 4-(4-(d₁₃)-hexyloxy- and (S)-(^-)-2-methylbutyl 4-(4-(d₁₇)-octyloxy-phenyl)benzoates. Fundamental physical properties such as phase transition temperatures, spontaneous polarization and tilt angle were determined. Polarized FTIR measurements were also made to provide information on molecular structure and orientation.     

Preparation of Zinc (II) and cadmium (II) complexes of the tetradentate Schiff base ligand 2-((E)-(2-(2-(pyridine-2-yl)- ethylthio)ethylimino)methyl)-4-bromophenol (PytBrsalH)

We describe the synthesis and characterization of two new zinc (II) and cadmium (II) complexes of the tetradentate dissymmetric Schiff base ligand 2-((E)-(2-(2-(pyridine-2-yl)ethylthio)ethylimino)methyl)-4-bromophenol (PytBrsalH), prepared from 1-(2-pyridyl)-3-thia-5-aminopentane (pyta) and 5-bromosalicylaldehyde. The complexes were synthesized by treating an ethanolic solution of the ligand with equimolar amounts of appropriate metal salts in 1 M methanolic solution of NaOH or alternatively, by a more direct route in which the two reactants are added to a solution of the ligand immediately after formation of the latter and prior to any isolation. The complexes were characterized by elemental analysis, FTIR, (1)H-NMR, electronic spectra and molar conductivity. According to obtained data, the probable coordination geometries of zinc and cadmium in these complexes with mixed N, S and O donor atoms are tetrahedral- and octahedral-like,respectively. Both complexes were found to be 1:1 electrolyte systems in acetonitrile.     

An equilibrium analysis of the aqueous H+-MoO4(2-)-(HP)O(3)2- and H+-MoO4(2-)-(HP)O(3)2--HPO4(2-) systems

The speciation in the phosphitomolybdate system, H+-MoO4(2-)-(HP)O(3)2-, has been determined from combined potentiometric and 31P NMR measurements in 0.600 M Na(Cl) medium at 298(1) K. Potentiometric titration data were collected in the ranges 2.5<-log[H+]<6.2, 40.0相似文献   

Photoelectron spectroscopy and density functional theory study of TiAlO(y) (-) (y=1-3) and TiAl(2)O(y) (-) (y=2-3) clusters

Small titanium-aluminum oxide clusters, TiAlO(y) (-) (y=1-3) and TiAl(2)O(y) (-) (y=2-3), were studied by using anion photoelectron spectroscopy. The adiabatic detachment energies of TiAlO(y) (-) (y=1-3) were estimated to be 1.11±0.05, 1.70±0.08, and 2.47±0.08eV based on their photoelectron spectra; those of TiAl(2)O(2) (-) and TiAl(2)O(3) (-) were estimated to be 1.17±0.08 and 2.2±0.1eV, respectively. The structures of these clusters were determined by comparison of density functional calculations with the experimental results. The structure of TiAlO(-) is nearly linear with the O atom in the middle. That of TiAlO(2) (-) is a kite-shaped structure. TiAlO(3) (-) has a kite-shaped TiAlO(2) unit with the third O atom attaching to the Ti atom. TiAl(2)O(2) (-) has two nearly degenerate Al-O-Ti-O-Al chain structures that can be considered as cis and trans forms. TiAl(2)O(3) (-) has two low-lying isomers, kite structure and book structure. The structures of these clusters indicate that the Ti atom tends to bind to more O atoms.     

Smectic A and smectic C materials: partially deuteriated chiral liquid crystals (S)-(-)-2-methylbuty 4-(4-(d13)-hexyloxyphenyl)benzoate and (S)-(-)-2-methylbutyl 4-(4-(d17)-octyloxyphenyl)benzoate

In order to study the difference in microscopic orientation of ferro- and antiferroelectric liquid crystalline molecules, we synthesized the partially deuteriated chiral compounds, (S)-(^-)-2-methylbutyl 4-(4-(d₁₃)-hexyloxy- and (S)-(^-)-2-methylbutyl 4-(4-(d₁₇)-octyloxy-phenyl)benzoates. Fundamental physical properties such as phase transition temperatures, spontaneous polarization and tilt angle were determined. Polarized FTIR measurements were also made to provide information on molecular structure and orientation.     

查尔酮衍生物E-2-(甲氨基)-7-(3-(吡啶基)丙烯酰基)卓酮的合成(英文)

以2-乙酰基-7-(甲氨基)卓酮(1)为原料,经由与各种吡啶醛的Claisen-Schmidt缩合反应得到查尔酮衍生物E-2-(甲氨基)-7-(3-(吡啶基)丙烯酰基)卓酮(2～5).全部合成产物均为新化合物,未见文献报道;其结构均由红外光谱分析、1H核磁共振、质谱及元素分析得以证实.     

Synthesis of (-)-7-epiaustraline and (-)-1-epicastanospermine

Highly efficient and selective syntheses of the title compounds are described. The cornerstone of the synthetic plan is the tandem inter [4 + 2]/inter [3 + 2] cycloaddition process. These syntheses differ from previous applications of this strategy in that they incorporate an alkylation in the hydrogenolysis step to close the second ring of the azabicyclic systems. Notable features of the sequence are (1) the highly regio- and stereoselective [3 + 2] cycloaddition of nitronate 15 with siloxymethyl (Z)-beta-silylvinyl ketone (Z)-22b and (2) the highly selective reduction of the resulting ketone 24a with L-Selectride. A single-crystal X-ray structure analysis of synthetic (-)-7-epiaustraline confirmed that the targeted structure was successfully synthesized. This stimulated a reexamination of the structural assignment of the natural product. (-)-1-Epicastanospermine was synthesized in four steps from the common intermediate 27a. The absolute configuration of (-)-1-epicastanospermine was assured by single-crystal X-ray structure analysis of intermediate (-)-27a. Thus, the sign of the optical rotation had to be revised. The overall efficiency of these syntheses were 9 steps and 23% yield for (-)-7-epiaustraline and 10 steps and 20% yield for (-)-1-epicastanospermine     

[Z]-2-(芳基锡基)-1-(9-芴醇)乙烯的合成、结构与性质

用三苯基氢化锡,三对甲苯基氢化锡作为锡氢化试剂与9-乙炔基-9-芴醇进行反应,合成了2个有机锡化合物:[Z]-2-(三苯基锡基)-1-(9-芴醇)乙烯(1)和[Z]-2-(三对甲苯基锡基)-1-(9-芴醇)乙烯(2)。化合物1和2分别与ICl,Br~2,I~2反应,得到6个有机锡一卤化物,6个有机锡二卤化物和2个有机锡混合卤化物(3-16)。有机锡一碘化物7,13和有机锡二碘化物8,14与KOH乙醇溶液反应,分别得到相应的有机锡氢氧化物17,18和有机锡氧化物19,20。有机锡二碘化物8,14分别与含氮双齿配体1,10-邻菲罗啉(Phen),2,2'-联吡啶(Bipy),8-羟基喹啉(Oxin)反应,得到6个相应的配合物21-26。26个新化合物通过元素分析,锡含量测定,IR,^1HNMR测定对其结构进行了表征。同时测定了化合物2的晶体结构,晶体属单斜晶系,空间群P2~1/c。化合物2是以Sn原子为中心扭曲的四面体构型。