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.
Mn complexes with N,N′ bis(furaldehyde)1,2 phenylenediamine(1)、N,N′ bis(furaldehyde) ethylenediamine(2),N,N′ bis(furaldehyde)1,2 diaminopropane(3),N,N′ bis(furaldehyde)1,3 diamino propane(4), and N,N′ bis(furaldehyde) diethylenetriamin(5) were used as catalysts in styrene epoxidation.The influences of different ligand,pH,axial ligand and reaction tiom on reactions were discussed.
The catalytic performance of catalyst,which was formed in situ from RuCl3-TPPTS[TPPTS:P（m-C6H4SO3Na）3],for slelctive hydrogenation of carbon-carbon double bond in acrylonitrile to prepare propionitrile were studied in biphasic system （aqueous/organic phase）.Good conversion and excellent selectivity were obtained.We studied the effect of KOH/Ru（molar ratio）,H2 pressure,P/Ru（molar ratio）,concentration of Ruthenium,temperature and reaction time on the catalytic activity and selectvity.The results show that the catalytic system have good conversion and very high slectivity for the hydrogenation of carbon-carbon double bond of acrylonitrile at the same time,the catalyst were separated readily from the product.
