Rhodium complex in situ formed by (R)PPhos (4,4’,6,6’tetramethoxy2,2’bis(diphenylphosphino)1,1’bipyridine) with the available rhodium precursors are used for the asymmetric hydroformylation of styren...Rhodium complex in situ formed by (R)PPhos (4,4’,6,6’tetramethoxy2,2’bis(diphenylphosphino)1,1’bipyridine) with the available rhodium precursors are used for the asymmetric hydroformylation of styrene.Effects of total pressure,temperature and the ratio of phosphine/rhodium on catalytic activity,chemoand enantioselectivity are discussed.(R)PPhosRh shows higher activity and regioselectivity and the enantioselectivity is as much as that catalyzed by (S)BINAPRh in the in situ asymmetric hydroformylation of styrene.展开更多
文摘Rhodium complex in situ formed by (R)PPhos (4,4’,6,6’tetramethoxy2,2’bis(diphenylphosphino)1,1’bipyridine) with the available rhodium precursors are used for the asymmetric hydroformylation of styrene.Effects of total pressure,temperature and the ratio of phosphine/rhodium on catalytic activity,chemoand enantioselectivity are discussed.(R)PPhosRh shows higher activity and regioselectivity and the enantioselectivity is as much as that catalyzed by (S)BINAPRh in the in situ asymmetric hydroformylation of styrene.
