简介：Thefirstexampleofenantioselectiveallylationofaldehydeswithchiralallylorganolan-thanidereagentshasbeenachievedinhighchemicalyieldandmoderateopticalpurity(upto54%e.e.).

简介：Ytterbiummetalreactswithiodinetogenerateytterbiumdiiodidedirectly,whichcanreactwithdiselenidestoformytterbiumselenolates(RSeYbI2).Thesespeciesreactedsmoothlywithallylbromidetogiveallylselenidesinmoderatotogoodyieldsunderneutralconditions.

简介：Grubbs'catalystwasusedtoprepareaseriesofcarbosilanedendrimerswithsilacyclopenteneperipheralgroups.Itwasfoundthatringclosingmetathesisreactionwasinfluencedstronglybythereactiontemperatureandtheamountofcatalyst.

简介：Theoneplusone(1+1)modeofhydrosilationreactionofladderlikecis-isotaticpolyallylsilsesquioxane(AllyI-T)andpolyhydrosilsesquioxane(H-T)usingdicyclopentadienylplatinumdichloride(Cp2PtCl2)asthecatalystleadstotheformationofanewpolyorganosiloxane(POS).ThepresenceofnanoscaletubularstructureintheproductPOSwaspreliminarilyprovedbyIR,1H-NMR,differentialscanningcalorimetry(DSC),X-raydiffraction(XRD),gelpermeationchromatography(GPC),atomicforcemicroscopy(AFM)andmolecularsimulation.

简介：Palladium-catalyzedallylationofcarbonucleophileshasbeenwidelyusedforcarbon-carbonbondformation.Amongtheallyliccompoundsstudied,allylicacetatesweremostwidelyusedasprecursorsof(π-allyl)palladiumintermediates.However,basessuchasNaHmustbeusedtogenerateanionsinthisreaction.Recently,researchoncarryingoutthepalla-

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简介：TheepoxidationofallylchloridewithH2O2onTi-ZSM-5preparedbyisomorphoussubstitutionofHZSM-5withTiCl4gaswasstudied.TheresultsshowthatTi-ZSM-5hasahighcatalyticefficiencyfortheepoxidationofallylchloride.TheH2O2utilizationreaches99.50%whentheallylchloride/H2O2molarratiois>1.Theeffectofsolventspecies,catalystconcentration,H2O2andallylchlorideconcentrationandreactiontemperatureontheepoxidationwasinvestigatedsimultaneously.Itisfoundthatmethanolisthebestsolventforthereaction.Thereactionrateequationwithv=k[Cat.][H2O2]1/2-[C3H5Cl]andtheapparentactivationenergywithEa=63.462kJ/molareobtainedaccordingtothekineticsstudy.

简介：Carbonylationofallylhalidescatalyzedbypoly(N-vinyl-2-pyrro-lidone)anchoredpalladiumcatalystaffordsβ,r-butonicacidunderatmo-sphericpressureandatroomtemperature.Theactivityandefficiencyofthecatalystaremuchhigherthanthoseofthereportedcatalystsforthisreaction.