简介：Theelectrochemicalreductionbehaviorofbilirubin(BR)atplatinumelectrodeinDMFwasinvestigatedbycyclicvoltammetry,insituelectronspinresonancespectroscopyandinsiturapidscanningthinlayerspectroelectrochemistry.ExperimentalresultsrevealedthatthereductionofBRfirstlyundergoesanECEprocess:BR-+eBR-dimerize(BR)22-+e(BR)23-.Thegenerated(BR)23-canbere-oxidizedtoBRandthentopurpurin(Pu)byaseriesofoxidationprocesses:(BR)23--e(BR)22--2e2BR,BR--2eBV--2ePu.However,there-reductionreactionsofPuarenotthereverseprocesses.Thedifferentreductionmechanismsarediscussedindetail.
简介： ThemissionoftheChemicalProcessR&DDepartmentatDuPontPharmaceuticalsCompanyistosupplydrugsubstanceinatimelyfashionandtodiscover/developascalable,economical,environmentallyfriendlyprocessforthecommercialproductionofthebulkdrugsubstance.Severalexampleswillbepresentedtoillustrateourefforttoaccomplishthemission.Briefdiscussionwillincludethefollowingprojects:1)SynthesisofDMP728,acyclicpeptideofGPIIb/IIIainhibitor2)Methodforthepreparationofa-chloroboronicacid,akeyintermediateforDuP714,apotentthrombininhibitor3)ProcessresearchanddevelopmentofRoxifiban,apotentandorallyactiveGPIIb/Illainhibitor ……
简介：Thepaperdealswiththedegradationoftheorganiccompoundsinthecokeplantwastewaterbythecombinedprocessofultrasonicirradiationandactivatedsludge.Theinfluencefactorsoftheultrasonicdegradationeffectsuchasairatmosphere,initialconcentration,ultrasonicpowerdensityandthecategoryandconsumptionofcatalystwereinvestigated.Awaterqualitymodelwasusedtoexplainthedegradationofdifferentkindsoforganiccompoundsinthecokeplantwastewaterbyultrasonicirradiation.Afterthewastewaterwastreatedbythecombinedprocessofultrasonicirradiationandactivatedsludge,theCODdegradationefficiencywas95.74%,whichis63.49%higherthanthatbytheprocessofactivatedsludgealone.
简介：Anovelgel-likeprocesshasbeendevelopedforsynthesizingLiaNi0.8Co0.2O2powders,usingcitricacidasachelatingagent.Thisprocessimprovesthehomogeneityofconstituentcationandenhancestheirreactivityintheobtainedprecursor.Theresultsofelectrochemicaltestdemonstratedthatthesematerialsexhibitedexcellentelectrochemicalproperties.Itsinitialcapacityreached181.6mAh/gandreversibleefficiencyatthefirstcycleisabout88.6%.
简介：Highlyselectivedimerizationofα-methylstyrene(AMS)waseffectedusingaBroenstedacidicionicliquid,[Hmim]^+BF4^-,assolventaswellascatalyst,providingtheindustrialhigh-valueolefin,2,4-diphenyl-4-methyl-1-pentene(1-PT).Thedesireddimer1-PTcouldbeobtainedin90%yieldat96%conversioninthedimerizationofAMSunderoptimizedconditions.Featuresoftheprocedureincludeuseofreadilyavailableionicliquid-catalyst,exclusionofvolatileorganicsolvents,higherselectivityandefficiencyfor1-PT.
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![A Novel and Efficient <b style='color:red'>Process</b> for Preparation of 2,4-Diphenyl-4-methyl-l-pentene in Broensted Acidic Ionic Liquid [Hmim]^＋BF4^-](/image/thesis7 "A Novel and Efficient <b style='color:red'>Process</b> for Preparation of 2,4-Diphenyl-4-methyl-l-pentene in Broensted Acidic Ionic Liquid [Hmim]^＋BF4^-")