Synthesis And Catalytic Properties Of Supported Dendritic Sn Complexes For Baeyer-Villiger Oxidation Of Ketones

The thesis consists of five chapters as followings:Chapter one:ReviewsThe thesis firstly presents a review of the history,the oxidation methods,the applications,the mechanism and the catalytic systems of the recent progress of Baeyer-Villiger oxidation.The thesis then reviews the recent progress of supported dendritic catalysts.The majority of this review is concerned with the important achievements in the fields of solid supported dendritic catalysts.Chapter two:Synthesis and catalytic properties of chloromethyl polystyrene supported dendritic Sn complexesDifferent generations of chloromethyl polystyrene supported dendritic Sn complexes (?)-PAMAM-HBA(1.0～3.0G)-Sn(Ⅱ),(?)-PAMAM-DHBA(1.0～3.0G)-Sn(Ⅱ)and(?) -PAMAM-SA(1.0～3.0G)-Sn(Ⅱ)(where(?)=chloromethyl polystyrene, PAMAM=polyamidoamine,G=generation,HBA=4-hydroxybenzaldehyde,DHBA=2,4-dihydroxybenzaldehyde and SA=salicylaldehyde)were prepared by solid pha.se synthesis methodology.The ligands and the complexes were characterized by IR,ICP and XPS.The complexes show promising catalytic activities for the Baeyer-Villiger oxidation of ketones with 30%hydrogen peroxide.2-Adamantanone,cyclohexanone,cyclopentanone were oxidized by 30%hydrogen peroxide in a reaction catalyzed by these complexes,affording the corresponding lactones or esters with high selectivity to the lactones.The catalysts can be recycled for several times without any significant decline in catalytic activity.The reactions were carried out using environmentally friendly oxidant in mild reaction conditions.Chapter three:Synthesis and catalytic properties of cellulose supported dendritic Sn complexesDifferent generations of cellulose supported dendritic Sn complexes(?) -PAMAM-HBA(1.0～3.0G)-Sn(Ⅱ),(?)-PAMAM-DHBA(1.0～3.0G)-Sn(Ⅱ)and(?) -PAMAM-SA(1.0～3.0G)-Sn(Ⅱ)(where(?)=cellulose)were prepared by solid phase synthesis methodology.The ligands and the complexes were characterized by IR,ICP and XPS.The complexes show promising catalytic activities for the Baeyer-Villiger oxidation of ketones with 30%hydrogen peroxide.2-Adamantanone,cyclohexanone, cyclopentanone were oxidized by 30%hydrogen peroxide in a reaction catalyzed by these complexes,affording the corresponding lactones or esters with high selectivity to the lactones.The catalysts can be recycled for several times without any significant decline in catalytic activity.The reactions were carried out using environmentally friendly oxidant in mild reaction conditions.Chapter four:Synthesis and catalytic properties of chitosan supported dendritic Sn complexesDifferent generations of chitosan supported dendritic Sn complexes(?) -PAMAM.HBA(1.0～3.0G)-Sn(Ⅱ),(?)-PAMAM-DHBA(1.0～3.0G)-Sn(Ⅱ)and(?) -PAMAM-SA(1.0～3.0G)-Sn(Ⅱ)(where(?)=chitosan)were prepared by solid phase synthesis methodology.The ligands and the complexes were characterized by IR,ICP and XPS.The complexes show promising catalytic activities for the Baeyer-Villiger oxidation of ketones with 30%hydrogen peroxide.2-Adamantanone,cyclohexanone, cyclopentanone were oxidized by 30%hydrogen peroxide in a reaction catalyzed by these complexes,affording the corresponding lactones or esters with high selectivity to the lactones.The catalysts can be recycled for several times without any significant decline in catalytic activity.The reactions were carded out using environmentally friendly oxidant in mild reaction conditions.Chapter five:Synthesis and catalytic properties of sillica supported dendritic Sn complexesDifferent generations of sillica supported dendritic Sn complexes(?)-PAMAM-HBA (1.0-3.0G)-Sn(Ⅱ),(?)-PAMAM-DHBA(1.0～3.0G)-Sn(Ⅱ)and(?)-PAMAM-SA (1.0～3.0G)-Sn(Ⅱ)(where(?)=sillica)were prepared by solid phase synthesis methodology. The ligands and the complexes were characterized by IR,ICP and XPS.The complexes show promising catalytic activities for the Baeyer-Villiger oxidation of ketones with 30% hydrogen peroxide.2-Adamantanone,cyclohexanone,cyclopentanone were oxidized by 30%hydrogen peroxide in a reaction catalyzed by these complexes,affording the corresponding lactones or esters with high selectivity to the lactones.The catalysts can be recycled for several times without any significant decline in catalytic activity.The reactions were carried out using environmentally friendly oxidant in mild reaction conditions.