简介：SodiumdithioniteinitiatedsulfinatodehalogenationofBrCF2CF2Risstudied.

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简介：1范围本标准规定了抗氧剂DLTDP（硫代二丙酸双十二醇酯）的要求、试验方法、检验规则、标志、包装、运输和贮存。

简介：Bothenantiomersoffluoxetineweresynthesizedinfivestepsfromethylbenzoylacetate(1)usingmicrobial-chemicalapproachwithoverallyieldsof59%and62%respectively.(S)-Enan-tiomercanbeobtainedin>99%e.e.byrestingcellofbaker’syeastandtheRformwasproducedin81%e.e.byimmobilizedGeotrichumsp.G38.

简介：本标准规定了亚磷酸三（2，4-二叔丁基苯基）酯（简称抗氧剂168）的要求，试验方法，检验规则，标志、包装、运输及贮存。

简介：1范围本标准规定了四[β-二叔丁基-4-羟基苯基）丙酸]季戊四醇酯（简称抗氧剂1010）的要求，试验方法，检验规则，标志、包装、运输及贮存。

简介：AseriesofdoubleperovskitesRSrMnFeO_6(R=La,Pr,Nd,Sm)wassynthesizedundermildhydrothermalconditions.Crystalgrowthsofthesamplesweresensitivetoalkalinity,temperature,fillingfraction,andcompositionofinitialreactionmixture.ThedesiredseriesofcompoundsbelongstotheclassofAA'BB'O_6perovskiteswitharandomdistributionofMnandFeatomsovertheB-cationsub-lattice.TheirstructuresshowthedistortedorthorhombicsymmetrywithspacegroupPnma.TheshapesandsizesofthecrystalswereanalyzedonaRigakuJSM-6700Fbyscanningelectronmicroscopy.AnalysisdonebyXPS,MssbauerspectroscopyandiodometrictitrationrevealsthatMnandFeionshave+4and+3oxidationstates,respectively.

简介：Bothenantiomersofdenopamineweresynthesizedusingmicrobial-chemicalapproachviabioreductionof1-(acetoxyphenyl)ketone4(R=CH2C1)and5(R=CO2Et)withfungusGeotrichumsp.G38.

简介：1范围本标准规定了双（2，4-二叔丁基苯基）季戊四醇二亚磷酸酯（简称抗氧剂626）的要求、试验方法、检验规则、标志、包装、运输和贮存。

简介：(-)-(5R,6S)-6-Acetoxyhexadecan-5-olide1,anaturalmosquitoattractantpheromone,wassynthesizedfromreadilyavailablealdehyde2andcyclopentanone3usingL-proline-catalyzedasymmetricaldolreactionasthekeystep.

简介：ＰＲＥＰＡＲＡＴＩＯＮＯＦＮ－ｔ－ＢＵＴＹＬＯＸＹＣＡＲＢＯＮＹＬ－Ｏ￣α－９－ＦＬＵＯＲＥＮＹＬＭＥＴＨＹＬＥＳＴＥＲＯＦＡＳＰＡＲＴＩＣＡＣＩＤ￥ＺｏｎｇＪｉｎＨＡＮ；ＺｈｅｎＫａｉＤＩＮＧａｎｄＱｉＫａｉＺＨＡＮＧ（ＢｅｉｊｉｎｇＩｎｓｔｉｔｕ...

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简介：第一部分：化学品及企业标志化学品中文名称：2，6-二叔丁基对甲酚化学品俗名或商品名：抗氧剂264（BHT，T-501）

简介：Startedfrom5-hydroxy-2-pentanone,(R)(E)-3,7-dimethyl-2-octene-1,8-dioicacid,callosobruchusicacid,wassynthesizedviafivestepswithD-(-)-camphorsultamasthechiralauxiliary.Itwasofgoodopticalpurityandyield.

简介：（R）－N－乙酰四氢噻唑－2－硫酮－4－羧酸在三乙胺存在下同乙酰氯反应得到光学活性产物（R）－N－乙酰四氢噻唑－2－硫酮－4－羧酸．用半经验的量子化学方法研究反应物及产物的电子结构和反应热焓．

简介：Theoptimalconditionsforthecomplexationreactionofmeso-tetra(3-methoxy-4-hy-droxyphenyl)porphineT(3-M-4HP)Pwithplatinumandrhodiumarepresented.Beer’sLawisobeyedwhentheconcentrationofrhodiumisintherangeof0.45-1.15μg/25mL.Themolarabsorptivityofrhodiumwasfoundtobe1.99×106L·mol-1·cm-1at460nm.ThevalueofεPtwasfoundtobe6.28×105L·mol-1·cm-1bylinearregressionmethod.TheKcoefficientmethodandcompensatingcoefficientwereusedtodetermineplatinumandrhodiumsimultaneoulywithoutremovalormaskingoftheinterferentsinthesample.Theresultsforthedeterminationofplatinumandrhodiuminthemixedsolutionofplatinumandrhodiumaresatisfactory.

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。

简介：Halfsandwichirondicarbonylcomplex[η5-C5H3(t-Bu)2]Fe(CO)2Cl(1)reactswith1,2-dilithiumdiselenocarboraneLi2Se2C2B10H10(2)togiveabinuclearironcarboranecomplex[η5-C5H3(t-Bu)2]2Fe2(CO)3*Se2C2B10H10(3).TheX-raydiffractionanalysisofcomplex3revealsthatoneoftheironatomsischiral.