学科分类
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435 个结果
  • 简介:乙醇2-的催化不对称的加氢的申请(benzo[b]thiophen-5-yl)为认知enhancerT-588的正式合成的-2-oxoacetate被描述。加氢作为添加剂与HCl在Ru-SunPhos系统的催化作用下面被进行。乙醇2-(benzo[b]thiophen-5-yl)-2-hydroxy-acetate与98.6%ee被获得,它能容易在简单再结晶以后被升级到99.5%ee并且在T-588的合成用作关键中介。

  • 标签: 不对称催化加氢 甲酸乙酯 噻吩 合成 不对称氢化
  • 简介:用具有光学活性和生物学活性的2类化合物(取代)香豆素-3-甲酰氯和2-氨基苯并噻唑作用合成了4种新的兼具香豆素骨架和苯并噻唑基的化合物(3a-3d),用HRMS,IR和1HNMR对化合物结构进行了表征,确定了化合物的结构,并对其紫外吸收光谱和荧光光谱与分子结构的关系进行了讨论.研究发现:在紫外光谱中,新化合物(3a-3d)和2种原料化合物相比,因共轭链的增长而使其最大吸收波长(λmax)红移;4种化合物表现出比原料化合物较强的荧光性能,其中3c的荧光强度最大.文中给出了稀溶液中紫外光谱和荧光光谱相关的一些信息.

  • 标签: 香豆素酰胺 合成 荧光光谱 紫外光谱
  • 简介:有结构N-(3-arylpropyl)-9,10-dihydro-9-oxoacridine-4-carboxamides(2029)的分子的一个新奇的类被用阶段药设计软件为有势力MDR颠倒活动产生pharmacophore设计。设计分子被一条新奇合成线路综合并且由标准Hoechst33342试金方法在P-glycoprotein(P-gp)的运输活动为他们的禁止的效果评估了。基于屏蔽的十标题混合物的pIC50价值,三混合物作为与用作标准的Verapamil相比展出了更好的活动。

  • 标签: 药物设计 合成路线 多药耐药 酰胺类 抗癌药物 二氢
  • 简介:Theadsorptioncapabilityofloamsoilfornano-TiO2affectedbytheamountandintensityofleachedwaterhasbeeninvestigatedbysimulatingthenaturalrainfallprocessundertheleachingcondition.Theresultsshowthattheamountandtheintensityofleachedwateraretwoimportantfactorsaffectingtheadsorptioncapabilityofloamsoilfornano-TiO2.Theresultsindicatethatthedepthoftheloamsoilcontainingamaximalamountofnano-TiO2isproportionaltotheamountofleachedwater,whileitisinverselyproportionaltotheintensityofleachedwater,ataconstantamountoftheleachedwater.Itwasalsofoundthattheadsorptioncapabilityofsoilsfornano-TiO2canbeimprovedbyaddingothermaterials,suchasdissolvedorganicmatter(DOM),bentoniteandstraw.ItwasfoundthatDOMisthebestsorbentforimprovingtheadsorptioncapabilityofloamsoilfornano-TiO2,followedbybentonite,whilestrawisnotsuitableforthemodificationofloamsoil.Theimprovementofadsorptioncapabilityofloamsoildependsontheamountoftheseadditives.Nano-TiO2canbeeffectivelyadsorbedonthesurfacelayerofloamsoilcontaininganappropriateamountofadditive.

  • 标签: 纳米二氧化钛 纳米吸收剂 吸附能力 土壤深度 溶解有机质 降雨过程
  • 简介:忍受2,6二度(imino)的一系列钴建筑群含苯氧基的ligands,LCoCl2[L=2,6-(ArNCH)2CH3C6H2OH]被ligand2,6二度(imino)的反应综合有钴二氯化物的相等的鼹鼠的酚,和这些建筑群被元素的分析描绘,1HNMR,MS和红外系列。一建筑群的结构被单个水晶X光检查衍射分析决定。

  • 标签: COBALT COMPLEX SCHIFF-BASE CRYSTAL structure
  • 简介:InT12SO4+Na2SO4+di(2-ethylhexyl)dithiophosphoricacid+n-CsH18+watersystem,theT1^+equilibriummolalitiesweremeasuredationicstrengthfrom0.1to2.0mol·kg^-1containingNa2SO4assupportingelectrolyteinaqueousphaseandatconstantmolalityofextractantattemperaturesfrom278.15to303.15Kinorganicphase.ThestandardextractionconstantsK^0atvarioustemperatureswereobtainedbymethodsofextrapolationandpolynomialapproximation.Thermodynamicquantitiesfortheextractionprocesswerecalculated.

  • 标签: 热力学 溶剂萃取法 二(2-乙烷基己基)二硫代磷酸 化学反应
  • 简介:Anefficientsyntheticmethodwasdevelopedtosynthesize2-substitutedbenzimidazolesandbenzo-xazoleswithβ-ketoestersasstartingmaterialsundermildreactionconditions,duringwhichotherfunctionalgroupsarebearablefromreactantstoproducts.

  • 标签: 取代苯并咪唑 高效合成 合成方法 反应条件
  • 简介:Theaggregationbehaviorandstructureofhydrophobicallymodifiedblockcopolymersofacrylamideand2-phenoxylethylacrylatewereinvestigatedbyviscometry,1HNMRrelaxation,2DNOESY,fluorescenceanddynamiclightscattering.Itwasfoundthattheaggregationbehaviorwasstronglydependentontheconcentrationofpolymersolutionandthehydrophobecontents.Withvaryingconcentrationfrom2.0,6.0,8.0to12.0g/L,thereweredifferentaggregatemorphologiesdistributedinaqueoussolutions,suchasmonopolymerchain,micelle-likeaggregate,multi-micelleaggregateandcross-linkednetwork.Accordingtothemodelofaggregation,itcangiveareasonableexplanationonthelargemagnitudeenhancementofviscositywiththeincreasingofpolymerconcentration.Additionaldataof2DNOESYandfluorescenceshowthatthecopolymerwithhigherhydrophobecontent(molarfraction≥1%)islikelytoformintra-molecularassociation.

  • 标签: 疏水改性聚丙烯酰胺 聚集行为 结构 嵌段共聚物 NOESY 聚合物溶液
  • 简介:Thenon-isothermaldecompositionoflead2,4,6-trinitroresorcinatemonohydrate,Pb(TNR)·H2O,wasinvestigatedbymeansofTG-DTA,DSCandIR.Thethermaldecompositionmechanismandthedissociatedkineticswerealsoinvestigated.ThekineticparameterswereobtainedfromtheanalysisoftheDSCcurvesbyintegralanddifferentialmethods.ThemostprobablekineticmodelfunctionofthedehydrationreactionofPb(TNR)·H2Owassuggestedbythecomparisonofthekineticparameters.

  • 标签: 热分解动力学 2 4 6-三硝基间苯二酚 铅化合物 一水化物
  • 简介:Inthisletter,Fe2O3UFP(UltrafineParticles)hydrosolandorganosolwithhighthirdorderopticalnonlinearsusceptibility(3)havebeenreportedforthefirsttime.ThesurfacialmodificationofFe2O3UFPwithdodecylbenzenesulfonateions(DBS)canenhancethenonlinearopticalresponsethroughinterfacialconfinementofelectronmotion.Theinvolvedmechanismisdiscussed.

  • 标签: CONFINEMENT INTERFACIAL SUSCEPTIBILITY ULTRAFINE hinder coated
  • 简介:基于刚性配体2-(4-噻唑基)苯并咪唑和二价金属铜离子在水热条件下成功地合成了2个Keggin型多酸化合物[CuⅡ(L1)2(H2O)]2[SiW12O40](1)和[(L1)4(L22(H3PMo12O40)2]·5H2O(2)(L1=2-(4-噻唑基)苯并咪唑,L2=苯并咪唑).通过单晶X-射线、红外光谱和元素分析对化合物1和2进行了表征.在化合物1中,存在2个独立的结构单元:Keggin型多酸和蝴蝶状的络合物阳离子[Cu(L1)2(H2O)]2+.化合物2为含有混合配体的超分子结构,由Keggin型多酸、4个游离的L1和2个L2配体组成.此外,研究了化合物1和2的电化学和光催化性能.

  • 标签: Keggin多酸 2-(4-噻唑基)苯并咪唑 苯并咪唑 电化学 光催化
  • 简介:Novelsulfur-containingcompounds(3a–3c,4a–4c)wereobtainedinethanolwith1,3-diphenyl-2-propanoneasthestartingmaterial.Theadvantagesofthisprocedureweremildreactionconditions,simpleprotocol,andhighyields.ThestructuresoftheproductswerecharacterizedbyIR,1HNMR,MSandelementaryanalysis.Thecrystalofthenewcompound4abelongstomonoclinic,spacegroupC2witha=18.727(3),b=6.5179(9),c=13.7576(18),b=131.0610(10)°,V=1266.2(3)A3,Z=2,Dc=2.136g/cm3,μ=1.078mm-1,F(000)=843,R=0.0490andwR=0.1247for3211observedreflectionwithI>2δ(I).X-rayanalysisrevealsthatthemoleculeisnotsymmetrical,themolecularstructureisstabilizedbyweakp–pstackinginteractions,andnoclassicalhydrogenbondscanbeobserved.

  • 标签: 硫醇 苄基 显示 合成 寺院 结构稳定
  • 简介:以胺甲基苯并咪唑和水杨醛为原料设计合成了一个苯并咪唑衍生物荧光探针,通过荧光分光光度法和紫外分光光度法探寻其对常见阴阳离子的选择性识别性能.研究结果表明,Cu2+对合成得到的苯并咪唑衍生物具有荧光猝灭——“关”的作用,而S2O72-对该荧光猝灭体系具有荧光恢复——“开”的作用.据此,提出了具有实现对Cu2+,S2O72-的荧光“关-开”型探针.

  • 标签: 苯并咪唑衍生物 荧光探针 阴离子 阳离子
  • 简介:Anovelaciddyeacidwassynthesizedbythecondensationreactionbetweenbromamineacidand2-amino-6-nitrobenzothiazoleanditsanti-UVprotectionpropertieswereevaluated.Theresultsshowedthatsilkdyedwiththisdyehadverygoodultravioletradiationprotectioncapabilityandexcellentdyeingperformance.TheUV-absorptionmechanismofthisdyewasalsodiscussed.

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  • 简介:采用水热方法并以邻菲啉为模板剂合成了一种过渡金属配合物连接的无机-有机层状结构的多金属钒酸盐Co(1,10-phen)(H2O)(VO3)2,该化合物经过X-射线单晶衍射、元素分析、红外光谱表征和热失重分析,并用循环伏安法研究了标题化合物的电化学性质.

  • 标签: 金属氧簇 水热合成 循环伏安 热失重
  • 简介:IntroductionIn2O3·Snfilmshavehightransparency(>95%)withinthevisiblespectralregion,lowresistivity(10-2—10-4ohm·cm)atroomtemperatureandsuperiorthermalstability.Thesefilmshavebeenappliedtosolarcells,electronicsandphotoelectronicsfields.Inrecentyears,organometallic-CVDmethodhasemergedasasuccessfulalternatetothephysicalmethodsandgeneralCVDforthegrowthofthesefilms.TheMO-CVDtech-

  • 标签: Metallorganic chemical VAPOUR DEPOSITION (MOCVD) Tin
  • 简介:Using2-bromo-1-methylpyridimiumiodideascarboxylactivatingagent,10ansa-macrolactamswerepreparedconvenientlyfromthecorrespondingseco-precursorw-aminoacidsintheyieldsof78-2%.

  • 标签: LACTAM ansa-macrolactam CYCLIZATION lactamization.