Enantioselective hydrogenation catalysts based on chiral phosphines phosphites bound polystyrene resins.

摘要

Catalysts enantioselective hydrogenation based phosphines phosphites chiral bound polystyrene resins. # Compound of structural formula L1 comprising a ligand phosphine-phosphite linked polystyrene, a stereogenic center at carbon {beta} the phosphino group, and where R {sup, 1}, R {sup, 2}, R {sup, 3a} and R {sup, 3b} are independently aryl groups or linear, branched or cyclic, X is an alkyl chain or a polyethylene glycol chain and PS it is a copolymer of divinylbenzene and vinyl bonded by one of its aromatic ring to the substituent X. as a process for obtaining. # Catalyst L1 comprising the compound and a metal selected from rhodium, ruthenium and iridium. Its preparation process and their use in asymmetric hydrogenation reactions.