Patent ID: 7026498

Claim:
The ligand represented by structure 3: wherein X and Y represent, independently for each occurrence, N(R) 2 , or P(R) 2 ; R, for each occurrence, independently represent hydrogen, halogen, alkyl, alkenyl, alkynyl, cycloalkyl, heterocycloalkyl, aralkyl, heteroaralkyl hydroxyl, alkoxyl, silyloxy, amino, nitro, sulfhydryl, alkylthio, imine, amide, phosphoryl, phosphonate, phosphine, carbonyl, carboxyl, carboxamide, anhydride, silyl, thioalkyl, alkylsulfonyl, arylsulfonyl, selenoalkyl, ketone, aldehyde, ester, heteroalkyl, nitrile, guanidine, amidine, acetal, ketal, amine oxide, aryl, heteroaryl, azide, aziridine, carbamate, epoxide, hydroxamic acid, imide, oxime, sulfonamide, thioamide, thiocarbamate, urea, thiourea, or —(CH 2 ) m —R 80 ; R 1 , R 2 , R 3 , and R 4 , for each occurrence, independently represent hydrogen, halogen, alkyl, alkenyl, or aryl; R 5 and R 6 , for each occurrence, independently represent halogen, alkyl, alkenyl, or aryl; the B and B′ rings of the binaphthyl core independently may be unsubstituted or substituted with R 5 and R 6 , respectively, any number of times up to the limitations imposed by stability and the rules of valence; R 1 and R 2 , and/or R 3 and R 4 , taken together optionally represent a ring consisting of a total of 5–7 atoms in the backbone of said ring; of which atoms zero, one or two atoms are heteroatoms; and said ring is substituted or unsubstituted; R 80 represents an unsubstituted or substituted aryl, a cycloalkyl, a cycloalkenyl, a heterocycle, or a polycycle; m is an integer in the range 0 to 8 inclusive; and the ligand, when chiral, is a mixture of enantiomers or a single enantiomer.