（1R，3R）－（－）－1－甲氧基－5，6－亚甲二氧基－3－（3，4，5－三甲氧苯基）－异苯并二氢呋喃的选择性合成

在ＬｉＡｌＨ４及光学活性物质（５Ｒ）－孟氧基－２（５Ｈ）－呋喃酮（５）存在下，将６－（３′，４′，５′－三甲氧基羟卞基）－胡椒醛二甲缩醛（４）的甲苯溶液加热回流８小时，可得旋光性的（１Ｒ，３Ｒ）－（－）－１－甲氧基－５，６－亚甲二氧基－３－（３，４，５－三甲氧苯基）－异苯并二氢呋喃晶体（１），产率６１．８％．     

（3S,4S）—1—苄基—3,4—二羟基吡咯的合成表征和电化学行为

合成了手性（３Ｓ，４Ｓ）－１－苄基－３，４－二羟基吡咯（１），通过元素分析、红外光谱、核磁共振光谱和旋光测定对其进行了表征，并通过循环伏安法研究其氧化还原性质．结果表明１的比旋光度为［α］２０Ｄ＝＋３０．４（ｃ＝４．３ｍｏｌ／Ｌ，甲醇），在ＤＭＦ中可电氧化为１－苄基－３，４－二羰基吡咯．     

芝麻素类型木脂素的合成研究Ⅳ2－苯基呋喃3，4－二羧酸二甲脂与格氏试剂反应的研究

研究了２－苯基呋喃－３，４－二羧酸二甲酯（２）与格氏试剂苯基溴化镁等（３）反应，生成酮基酸酯２－苯基－４－苯甲酰基呋喃－３－羧酸甲酯（１）的条件和方法。     

1－（ω－烷氧基烷基）己内酰胺的相转移合成法

己内酰胺与α，ω－二卤代烷在固－液相转移条件下（ＫＯＨ／Ｋ２ＣＯ３混合碱，ＴＢＡＢ为ＰＴＣ）反应得１－（ω－卤代烷基）己内酰胺１，研究了反应温度、时间、碱及催化剂用量对１，４－二溴了烷与己内酰胺进行单取代反应产率的影响．结果表明：当己内酰胺：１，４－二溴丁烷：氢氧化钾：碳酸钾：ＴＢＡＢ为１：３：１．５、３：０．０５（摩尔比）时，９０℃下反应，１３ｈ，产率可达７５．４％，并合成了其它３个１－（ω－卤代烷基）己内酰胺，在类似的固－液相转移条件下，１与醇反应得标题化合物．     

〔Eu(NTO)_3(H_2O)_5〕5H_2O的合成和晶体结构

用３－硝基－１，２，４－三唑－５－酮（ＮＴＯ）的锂盐水溶液与Ｅｕ２Ｏ３的稀硝酸溶液反应，合成了ＮＴＯ的铕配合物，其单晶结构用Ｘ射线分析法进行了测定，确定了它的结构式为〔Ｅｕ（ＮＴＯ）３（Ｈ２Ｏ）５〕５Ｈ２Ｏ。其晶体属单斜晶系，空间群为Ｐ２１／ｎ，最终偏离因子Ｒ为０．０２３。晶胞参数如下：ａ１．８７２０（２）ｎｍ，ｂ０．６５４８（３），ｃ１．９３２３（３）ｎｍ，β９５．３３（１）°，Ｖ２．３５８３（５）ｎｍ３，Ｚ４，Ｄｃ２．０２６ｇｃｍ－３，μ２７．６７８ｃｍ－１，Ｆ（０００）１４３２。铕离子的配位数为８，其配位多面体为畸变的十二面体     

2－硝基甲基噻唑－4－羧酸乙酯的合成及与丙烯酰胺的缩合

２－溴代甲基噻唑－４－羧酸乙酯（Ⅱ）用ＮａＮＯ２或ＡｇＮＯ２硝化，得到２－硝基甲基噻唑－４－羧酸乙酯（Ⅲ）．发现Ⅲ在ＤＭＳＯ中以酸式异构体存在，在ＣＤＣｌ３中以假酸式存在．在Ｍｉｃｈａｅｌ加成条件下，（Ⅲ）与丙烯酰胺缩合，没有得到预期的产物２－〔３′（３′－硝基丙酰胺）〕噻唑－４－羧酸乙酯（Ⅳ）而是得到相当于１，３－偶极加成产物，２－〔３′（５′－酰胺基二氢异口恶唑基）〕噻唑－４－羧酸乙酯（Ⅴ）．讨论它的形成机理     

3－（5－甲基异恶唑－3－基）－4－芳酰基－1．2．4－三唑啉－5－巯基乙酸的合成

以３－（５－甲基异恶唑－３－基）－４－芳酰基－１．２．４－三唑啉－５－硫酮为原料，合成了８个新的３－（５－甲基异恶唑－３－基）－４－芳酰基－１．２．４－三唑啉－５－巯基乙酸类化合物，该化合物经ＩＲ，￣１Ｈ－ＮＭＲ和ＭＳ裂解碎片分析确定其结构。     

4-全氟烷基-6-(α-噻吩基)-2-吡喃酮和4-(α-噻吩甲酰基)-3-全氟烷基-3-丁烯酸甲酯的简便合成

溴化（α－噻吩甲酰基）甲基三苯基钅米舛１在碳酸钾存在下，二氯甲烷为溶剂，室温与２－全氟炔酸甲酯２反应，高产率地得到加合产物——４－（α－噻吩甲酰基）－２－三苯基膦基－３－全氟烷基－３－丁烯酸甲酯３．加合产物３在９∶１甲醇－水中封管１４０℃或１８０℃加热一定时间，高产率地得到４－全氟烷基－６－（α－噻吩基）－２－吡喃酮４和４－（α－噻吩甲酰基）－３－全氟烷基－３－丁烯酸甲酯５．化合物５是一对Ｚ、Ｅ异构体．所有新化合物的结构都由波谱予以确定．本文对反应机理也作了推测．     

镝(Ⅲ)-1,10-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)癸二酮-[1,10]-溴化十六烷基三甲胺体系的荧光性质及其应用研究

研究了镝（Ⅲ）－１,１０－双（１′－苯基－３′－甲基－５′－氧代吡唑－４′－基）癸二酮－［１,１０］（ＢＰＭＰＤＤ）－溴化十六烷基三甲胺（ＣＴＭＡＢ）体系的荧光性质,探讨了体系的组成比及影响体系荧光性质的多种因素,拟定了应用该体系测定Ｄｙ（Ⅲ）的新方法,在２０×１０－６～４０×１０－９ｍｏｌ·Ｌ－１范围内Ｄｙ（Ⅲ）浓度与荧光强度呈线性关系,检测限为３３×１０－１０ｍｏｌ·Ｌ－１．将该法应用于合成样品中微量Ｄｙ（Ⅲ）的测定,结果满意     

4－羟基－3，5－二溴苄叉绕丹宁分光光度法测定银（Ⅰ）

本文提出了新显色剂４－羟基－３，５－二溴苄叉绕丹宁测定银（Ｉ）的分光光度方法．在ｐＨ１２，聚乙二醇－４００存在下，银（Ｉ）与４－羟基－３，５－二溴苄叉绕丹宁形成１：２深红色络合物，其最大吸收波长在５１０ｎｍ，并且在室温下可稳定存在２４小时以上．在２５ｍＬ容积中，Ａｇ￣＋在０～１００μｇ范围符合比尔定律，摩尔吸光系数为１．１５×１０￣４Ｌ·ｍｏＬ￣（－ｌ）·ｃｍ￣（－１），标准偏差为０．００３（ｎ＝１０）．     

关于丢番图方程Ax4+Bx2y2+Cy4=z2的解

证明了丢番图方程4x4-6x2y2 3y4=z2,(x,y)=1的全部正整数解为(x,y,z)=(x0／2,ab,(3a4 b4)／4), (Xn,2yn,2zn),认为仅有正整数解(x,y,z)=(1,1,1)是不妥的,它漏掉了(xn,2yn,2zn)及(x0／2,ab,(3a4 b4)／ 4);丢番图方程x4-6x2y2 12y4=z2,(x,y)=1的全部正整数解为(x,y,z)=(x0,ab,(3a4 b4)／2),(xn,yn, zn),认为仅有正整数解(xn,yn,zn),则漏掉了(x0,ab,(3a4 b4)／2)。     

Sb＿2O＿3－ZnSn（OH）＿6－ZnNH＿4PO＿4阻燃体系的研究

研究了在聚氯乙烯（ＰＶＣ）中，Ｓｂ＿２Ｏ＿３－ＺｎＳｎ（ＯＨ）＿６，Ｓｂ＿２Ｏ＿３－ＺｎＮＨ＿４ＰＯ＿４，ＺｎＳｎ（ＯＨ）＿６－ＺｎＮＨ＿４ＰＯ＿４二元体系的协同阻燃性能，以及Ｓｂ＿２Ｏ＿３－ＺｎＳｎ（ＯＨ）＿６－ＺｎＮＨ＿４ＰＯ＿４三元系的阻燃性能，采用混料回归实验设计，导出了三元系氧指数与阻燃剂含量关系的数学模型，经计算机计算并绘制出了氧指数等值图，该体系中Ｓｂ＿２Ｏ＿３－ＺｎＳｎ（ＯＨ）＿６，Ｓｂ＿２Ｏ＿３－ＺｎＮＨ＿４ＰＯ＿４复配具有正的协同作用，而ＺｎＳｎ（ＯＨ）＿６－ＺｎＮＨ＿４ＰＯ＿４复配则表现为负的协同作用。     

一种含吡啶环和三氟甲基取代基的芳香二胺的合成与表征

以4-三氟甲基苯甲醛、4'-硝基苯乙酮和醋酸铵为原料,在冰醋酸介质中,通过改进的Chichibabin反应得到了二硝基化合物4-(4-三氟甲基苯基)-2,6-二(4-胺基苯基)吡啶(TMPBNPP),继而用Pd/C和水合肼将TMPBNPP进行还原,成功合成了一种新型含吡啶环和三氟甲基侧基的芳香二胺4-(4-三氟甲基苯基)-2,6-二(4-胺基苯基)吡啶(TMPBAPP),2步反应总收率为48;,并用核磁共振谱、红外光谱和X-射线衍射等手段对其结构进行了分析表征.     

Multiphoton ionization of pyrrole-water mixed clusters

Multiphoton ionization of the hydrogen-bonded pyrrole-water clusters ( C4H5 N)n H2O)m is studied with a reflectron?time of flight mass spectrometer at 355 nm. With increasing partial concentration of pyrrole in a gas mixture source, a series of poly-pyrrole-water binary-mixed cluster ions can be observed, including unprotonated cluster ions [(C4H5N)x (H2O)y]* , protonated cluster ions [(C4H5N)x (H2O)yH]* and dehydrogenated cluster ions [ ( C4 H4 N) ( C4 H5 N) x ( H2O) y ] + . Ab initio calculations of their structures, bond strengths, charge distributions and re action energies are carried out. Stable structures of these clusters are obtained from the calculations. A probable forma tion mechanism of the cluster ions [(C4H5N)x(H2O)y] + , [(C4H5N)x (H2O)y]H+ and [(C4H4N) (C4H5N)x (H2O)y]-is supposed to be the ionization of clusters followed by dissociation.     

对甲苯基-三(异丙烷氧基)钛配合物的晶体结构

Ti(OiPr)3Cl与1当量的对甲苯基溴的格氏试剂反应,合成得到双核的对甲苯基-三(异丙烷氧基)钛配合物{(4-CH3C6H4)Ti(OiPr)2(μ-OiPr)}2.X-ray单晶衍射分析表明该配合物属于三斜晶系,P(-1)空间群,a=10.2110(4),b=11.2419(4),c=17.6221(9),α=78.464(4)°,β=74.771(4)°,γ=69.359(4)°.配合物的分子是一个二聚结构,通过两个异丙烷氧基的氧原子桥联形成一个Ti2O2骨架结构.每个钛金属中心分别与一个对甲苯基和四个异丙烷氧基的氧原子采取五配位的扭曲的双三角锥构型.     

基于2,5-双(4-吡啶基)-1,3,4-(口恶)二唑配体的钴高氯酸盐超分子配合物的一种新晶型研究

在丁二酸和三乙胺存在下,高氯酸钴与2,5-双(4-吡啶基)-1,3,4-(口恶)二唑 (4-bpo) 反应生成配合物[Co(4-bpo)2(H2O)4](4-bpo)2(ClO4)2(H2O)6 (1) 的一种新晶型:单斜晶系,P2/n空间群,晶胞参数为a=1.909 2(2) nm, b=0.699 7(8) nm, c=2.271 1(3) nm, β=98.462(2)o, V=3.000 6(6) nm3, Z=2. 配位单元中的八面体钴离子处于结晶学反演中心,配位原子分别来自于赤道平面上的4个水分子和2个轴向吡啶氮原子. 晶格水分子、4-bpo和高氯酸根位于单核配位阳离子[Co(4-bpo)2(H2O)4]2+的周围,并通过多种O-H...O及O-H...N氢键作用连接形成新颖的主-客体包合结构,其中游离的阴离子处于所形成的二维氢键层内和层间的空隙中.     

A soluble form of CD4 (T4) protein inhibits AIDS virus infection

CD4 (T4) is a glycoprotein of relative molecular mass 55,000 (Mr 55K) on the surface of T lymphocytes which is thought to interact with class II MHC (major histocompatibility complex) molecules, mediating efficient association of helper T cells with antigen-bearing targets. The CD4 protein is also the receptor for HIV, a T-lymphotropic RNA virus responsible for the human acquired immune deficiency syndrome (AIDS) (refs 4-7). To define the mechanisms of interaction of CD4 with the surface of antigen-presenting cells and with HIV, we have isolated the CD4 gene and expressed this gene in several different cellular environments. Here we describe an efficient expression system in which a recombinant, soluble form of CD4 (sCD4) is secreted into tissue culture supernatants. This sCD4 retains the structural and biological properties of CD4 on the cell surface, binds to the envelope glycoprotein (gp110) of HIV and inhibits the binding of virus to CD4+ lymphocytes, resulting in a striking inhibition of virus infectivity.     

(3S,4R)-4-氨基-3-羟基-5-环已基戊酸的非氨基酸途径合成方法

报道了从 (S) -苹果酸出发合成 (3S,4R) - Statine类似物活化形式的改良方法 .使用 N-保护的苹果酰亚胺后 ,其随后的格氏试剂加成和脱氧还原可分别达到 95%的区域选择性和 95%的反式立体选择性     

A new A4 amyloid mRNA contains a domain homologous to serine proteinase inhibitors

The amyloid proteins isolated from neuritic plaques and the cerebrovasculature of Alzheimer's disease are self-aggregating moieties termed A4 protein and beta-protein, respectively. A putative A4 amyloid precursor (herein termed A4(695] has been characterized by analysis of a human brain complementary DNA. We report here the sequence of a closely related amyloid cDNA, A4(751), distinguished from A4(695) by the presence of a 168 base-pair (bp) sequence which adds 57 amino acids to, and removes one residue from, the predicted A4(695) protein. The peptide predicted from this insert is very similar to the Kunitz family of serine proteinase inhibitors. The two A4-specific messenger RNAs are differentially expressed: in a limited survey, A4(751) mRNA appears to be ubiquitous, whereas A4(695) mRNA has a restricted pattern of expression which includes cells from neuronal tissue. These data may have significant implications for understanding amyloid deposition in Alzheimer's disease.     

Tin Oxide and Carbon Composite （Sn6O4（OH）4/AG） as the Anode in a Lithium Ion Battery

A tin oxide and carbon composite （Sn6O4（OH）4/AG） with a Sn content of 0.15-0.30 was prepared by chemical deposition at normal pressures and temperatures. The structures of the artificial graphite （AG）, the Sn6O4（OH）4, and the Sn6O4（OH）4JAG were analyzed using X-ray diffraction. The electrochemical lithiation was investigated by measuring the galvanostatic charge and discharge ratio. The electrochemical capacities of the three materials during the first discharge were 310 mAh/g （AG）, 616 mAh/g （Sn6O4（OH）4/AG）, and 1090 mAh/g （Sn6O4（oa）4）. The discharge capacity of the Sn6O4（OH）4/AG was larger than the simple sum of the capacities provided by AG and Sn6O4（OH）4 with the same content. The cyclic performance of Sn6O4（OH）4/AG was also better than that of Sn6O4（OH）4 for voltages of 0 to 3 V. The results imply that the interaction between Sn and C in Sn6O4（OH）4/AG is very strong and effectively inhibits the volume expansion of the Sn.