Rhodium-catalyzed hydroformylation in γ-valerolactone as a biomass-derived solvent

摘要: Abstract Rhodium-catalyzed hydroformylation of styrene, α-methylstyrene, dimethyl itaconate, and ( R )-limonene was performed in gamma-valerolactone (GVL) as a proposed biomass-based environmentally benign solvent for referring to toluene generally used conventional solvent. Both achiral (triphenylphosphine, 1,3-bis(diphenylphoshino)propane) enantiopure bidentate phosphine ligands (( S , )-BDPP, )-BINAP, )-QUINAP, )-DIOP, c ),( p )-JOSIPHOS, )-SEGPHOS, )-(DM)-SEGPHOS) were investigated situ generated Rh-diphosphine catalyst systems. In general, the catalysts' activity GVL lower than toluene; however, remarkable chemo- (>99%) regioselectivities (>95%) achieved under identical conditions. The BDPP-modified Rh-catalyst recycled three consecutive cycles; however decrease its detected.