简介：Anewseriesof1,3,2-oxazaborolidinecatalystssubstitutedinposition4bythe(CH3)3C(CH2)ngroup(n=2,3,4,5)weresynthesizedandappliedtotheboranereductionofprochi-ralketones.Therelationshipbetweencatalyststructureandenantioselectivitywasdiscussed.

简介：EasilyavailableD-(+)-camphor-derivedchiralmercapto-alcohols2and3wereemployedforcatalyticasymmetricboranereductionofaromaticketones.Moderateenantioselectivitieswithe.e.20.2-72.1%wereobtainedwith10mol%catalyst.Oppositeasymmetricinductionwasachievedwhenmercapto-alcohols2and3wereused.

简介：Core-shellstructurednanosphereswithmesoporoussilicashellandNicore(denotedasNi@meso-SiO2)arepreparedthroughathree-stepprocess.MonodispersedNiprecursorsarefirstprepared,andthencoatedwithmesoporousSiO2.FinalNi@meso-SiO2spheresareobtainedaftercalcination.TheproductsarecharacterizedbyX-raypowderdiffraction,transmissionelectronmicroscopyandN2adsorption-desorptionmethods.Thesesphereshaveahighsurfaceareaandarewelldispersedinwater,showingahighcatalyticactivitywithaTOFvalueof18.5,andoutstandingstabilityinhydrolyticdehydrogenationofammoniaboraneatroomtemperature.