Two cobalt（Ⅱ） complexes 1 and 2 of Schiff bases derived from amino acids were synthesized and used for oxidation of benzyl alcohol with molecular oxygen at different conditions of pH,solvent,temperature and complex...Two cobalt（Ⅱ） complexes 1 and 2 of Schiff bases derived from amino acids were synthesized and used for oxidation of benzyl alcohol with molecular oxygen at different conditions of pH,solvent,temperature and complex/alcohol molar ratio to optimize reaction conditions and to evaluate the catalytic efficiency of new cobalt Schiff base complexes.Under obtained optimum conditions,various alcohols were oxidized to corresponding aldehydes and ketones.展开更多
Synthesis and structure of Ti complex having a pair of chelating aminotropone[O-N]ligand have been reported.Calculations of density functional theory（DFT） studies suggest that bis（aminotropone） Ti complex,when act...Synthesis and structure of Ti complex having a pair of chelating aminotropone[O-N]ligand have been reported.Calculations of density functional theory（DFT） studies suggest that bis（aminotropone） Ti complex,when activated with methylaluminoxane （MAO）,have high potential for the polymerization of olefinic monomers.These theoretical studies also show that the active species derived from bis（aminotropone） Ti catalyst normally possess higher electrophilicity nature compared with those produced using bis（phenoxyimine） Ti complexes（Ti-FI catalysts） which are known as high performance olefin polymerization catalysts. Bis（aminotropone） Ti catalyst generates a catalytically active species that has higher electrophilicity than a Ti-FI catalysts.展开更多
A new series of 1-ethoxy-3-（4-aryl）-1-phenyl-1H-benzo[f]chromenes have been synthesized efficiently.The procedure involves the multicomponent reaction of 2-naphthol,acetophenone derivatives,and triethyl orthobenzoat...A new series of 1-ethoxy-3-（4-aryl）-1-phenyl-1H-benzo[f]chromenes have been synthesized efficiently.The procedure involves the multicomponent reaction of 2-naphthol,acetophenone derivatives,and triethyl orthobenzoate catalyzing by efficient bis（2-anilinotropone） Ti complex.展开更多
New 9-（alkyl or aryl）acenaphtho[l,2-b]furan-8-（alky or aryl）amine compounds has herein been reported by one-pot reaction of （acenaphthylen-l-yloxy）trimethylsilane,alkyl and aryl aldehydes,and aryl and alky isocy...New 9-（alkyl or aryl）acenaphtho[l,2-b]furan-8-（alky or aryl）amine compounds has herein been reported by one-pot reaction of （acenaphthylen-l-yloxy）trimethylsilane,alkyl and aryl aldehydes,and aryl and alky isocyanides in refluxing DMF.展开更多
文摘Two cobalt（Ⅱ） complexes 1 and 2 of Schiff bases derived from amino acids were synthesized and used for oxidation of benzyl alcohol with molecular oxygen at different conditions of pH,solvent,temperature and complex/alcohol molar ratio to optimize reaction conditions and to evaluate the catalytic efficiency of new cobalt Schiff base complexes.Under obtained optimum conditions,various alcohols were oxidized to corresponding aldehydes and ketones.
文摘Synthesis and structure of Ti complex having a pair of chelating aminotropone[O-N]ligand have been reported.Calculations of density functional theory（DFT） studies suggest that bis（aminotropone） Ti complex,when activated with methylaluminoxane （MAO）,have high potential for the polymerization of olefinic monomers.These theoretical studies also show that the active species derived from bis（aminotropone） Ti catalyst normally possess higher electrophilicity nature compared with those produced using bis（phenoxyimine） Ti complexes（Ti-FI catalysts） which are known as high performance olefin polymerization catalysts. Bis（aminotropone） Ti catalyst generates a catalytically active species that has higher electrophilicity than a Ti-FI catalysts.
文摘A new series of 1-ethoxy-3-（4-aryl）-1-phenyl-1H-benzo[f]chromenes have been synthesized efficiently.The procedure involves the multicomponent reaction of 2-naphthol,acetophenone derivatives,and triethyl orthobenzoate catalyzing by efficient bis（2-anilinotropone） Ti complex.
文摘New 9-（alkyl or aryl）acenaphtho[l,2-b]furan-8-（alky or aryl）amine compounds has herein been reported by one-pot reaction of （acenaphthylen-l-yloxy）trimethylsilane,alkyl and aryl aldehydes,and aryl and alky isocyanides in refluxing DMF.
