The synthesis of a new type of selena aza crown ether 6 (4 nitrobenzyl) 1,4,7,10 selenatriazacyclododecane (L) derivated from phenylalanine , and its platinum(Ⅱ) complex was described. The catalytic activity of...The synthesis of a new type of selena aza crown ether 6 (4 nitrobenzyl) 1,4,7,10 selenatriazacyclododecane (L) derivated from phenylalanine , and its platinum(Ⅱ) complex was described. The catalytic activity of this complex for the hydrosilylation of olefins by triethoxysilane was investigated.展开更多
A series of selena aza crown ether is condensed by 1,5 bis(p tosylsulphonylamino) 3 selena pentane with ditosylates or dihalides in K 2CO 3/DMF or NaH/DMF. The yields are about 30% 60%.
Three selena-crown-4 derivatives have been prepared and their cation hinting abilities and selectivities with alkali and heavy metal ions have been evaluated by solvent extraction of aqueous metal picrates to show the...Three selena-crown-4 derivatives have been prepared and their cation hinting abilities and selectivities with alkali and heavy metal ions have been evaluated by solvent extraction of aqueous metal picrates to show the highest Ag+ extractability for novel benzo-selena-14-crown-4 (2,3-benzo-7, 12-diselena-1, 4-dioxacyclotetradecane-2-ene) over any other crown ethers.展开更多
文摘The synthesis of a new type of selena aza crown ether 6 (4 nitrobenzyl) 1,4,7,10 selenatriazacyclododecane (L) derivated from phenylalanine , and its platinum(Ⅱ) complex was described. The catalytic activity of this complex for the hydrosilylation of olefins by triethoxysilane was investigated.
文摘A series of selena aza crown ether is condensed by 1,5 bis(p tosylsulphonylamino) 3 selena pentane with ditosylates or dihalides in K 2CO 3/DMF or NaH/DMF. The yields are about 30% 60%.
基金Project supported by the National Outstanding Youth Fund (Gran No.29625203), the National Natural Science Foundation of China (No.29672021).
文摘Three selena-crown-4 derivatives have been prepared and their cation hinting abilities and selectivities with alkali and heavy metal ions have been evaluated by solvent extraction of aqueous metal picrates to show the highest Ag+ extractability for novel benzo-selena-14-crown-4 (2,3-benzo-7, 12-diselena-1, 4-dioxacyclotetradecane-2-ene) over any other crown ethers.