Patent ID: 6395916
Filing Date: 2002-05-28
Classification: C07C,C07D,C07F

Abstract:
The ligand represented by structure 4: whereinR is selected, independently for each occurrence, from the group consisting of alkyl, cycloalkyl, aryl, aralkyl, and â€”(CH2)mâ€”R80; the A and Aâ€² rings of the biphenyl core independently are unsubstituted or substituted with R1 and R2, respectively, one, two, three, or four times; R1 and R2 are selected, independently for each occurrence, from the group consisting of alkyl, cycloalkyl, aryl, aralkyl, halogen, â€”SiR3, and â€”(CH2)mâ€”R80; R80 represents unsubstituted or substituted aryl, cycloalkyl, cycloalkenyl, or polycycle; m is independently for each occurrence an integer in the range 0 to 8 inclusive; and the ligand, when chiral, is a mixture of enantiomers or a single enantiomer.