Preparation of optically pure 1,2,5-triphenylphospholane. Use as ligand for enantioselective transition-metal catalysis.
作者:Jean-Claude Fiaud、Jean-Yves Legros
DOI:10.1016/s0040-4039(00)93435-x
日期:1991.9
Base-catalyzed isomerization of achiral (E,E)-1,2,5-triphenylphospholane oxide leads to the racemic (E,Z)-isomer. Resolution of Supercritical Fluid Chromatography (SFC) followed by reduction gives the two enantiomers. The activity of this new ligand is tested in palladium-catalyzed coupling of cyclohex-2-enyl acetate with nucleophiles.
碱催化的非手性(E,E)-1,2,5-三苯膦氧化物的异构化导致外消旋(E,Z)-异构体。拆分超临界流体色谱(SFC),然后还原,得到两种对映异构体。在钯催化的环己-2-烯基乙酸酯与亲核试剂的钯催化偶联中测试了这种新配体的活性。