We synthesized a-seleno substituted semistabilized arsoniurn ylide 3 by the transylida-tion reaction and found that it could undergo Wittig reaction smoothly as a new method for synthe-sizing vinyl selenides.
The fluorine-containing trans-l,2-cyclopropane derivatives 4ba--4dd were synthesized from the fluorine-containing electron-deficient alkenes 3a--3d with semistabilized arsonium ylides 2b--2d, in biphasic system of dic...The fluorine-containing trans-l,2-cyclopropane derivatives 4ba--4dd were synthesized from the fluorine-containing electron-deficient alkenes 3a--3d with semistabilized arsonium ylides 2b--2d, in biphasic system of dichloromethane-50% aqueous sodium hydroxide, generated in situ from the corresponding arsonium salts 1b-1d at room temperature in good yields with high stereoselectivity. The structure of fluorine-containing trans-1,2-cyclopropane derivatives were also studied.展开更多
文摘We synthesized a-seleno substituted semistabilized arsoniurn ylide 3 by the transylida-tion reaction and found that it could undergo Wittig reaction smoothly as a new method for synthe-sizing vinyl selenides.
基金Project supported by the the National Natural Science Foundation of China （Nos. 20872086 and 20872088）, and the Project of Shanghai Municipal Education Commission （Nos. 09YZ19 and J50102）.
文摘The fluorine-containing trans-l,2-cyclopropane derivatives 4ba--4dd were synthesized from the fluorine-containing electron-deficient alkenes 3a--3d with semistabilized arsonium ylides 2b--2d, in biphasic system of dichloromethane-50% aqueous sodium hydroxide, generated in situ from the corresponding arsonium salts 1b-1d at room temperature in good yields with high stereoselectivity. The structure of fluorine-containing trans-1,2-cyclopropane derivatives were also studied.
