Patent ID: 6903043

Claim:
A chiral polymeric salen catalyst of formula (1), wherein R 1 , R 2 , R 3 , X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , Y 1 , and Y 2 represent individually a hydrogen atom, C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, halogen, hydroxy, amino, thiol, nitro, amine, amide, carbonyl, carboxyl, silyl, ether, thioether, salenoether, ketone, aldehyde, ester, phosphoryl, phosphonate, phosphine, sulfonyl, or (CH 2 ) k —R 4 , where R 4 is phenyl, cycloalkyl, or cycloalkenyl, k is an integer of 0 to 8, and any two of R 1 , R 2 , or R 3 , can be bonded to each other to form a carbocycle containing 4 to 10 atoms; M represents a metal atom chosen from Co, Cr, V, Fe, Mo, W, and Ru; Z represents PF 6 , or BF 4 ; m is an integer of 8 to 20; n is an integer of 1 to 6; and with the proviso that R 3 is not a hydrogen atom, halogen, hydroxy, amino, nitro, amine or amide.