Patent ID: 6399534
Filing Date: 2002-06-04
Classification: B01J,C07C,C07F,C08F

Abstract:
A multidentate phosphite ligand of the formulae I, II or III: wherein:each R1 independently is C1 to C12 alkyl, C6 to C20 aryl, F, Cl, â€”CO2R4, â€”OR4, or â€”R3Z, provided that at least one R1 is â€”R3Z; each R2 independently is H, F, Cl, C1 to C12 alkyl, C6 to C20 aryl, â€”OR4, â€”CO2R4, â€”C(O)R4, â€”CHO, â€”CN, or â€”CF3; each R3 independently is C1 to C10 alkylene; each R4 independently is C1 to C12 alkyl or C6 to C20 aryl; each Z is â€”CO2R4, â€”CHO, â€”C(O)R4, â€”C(O)SR4, â€”SR4, â€”C(O)NR5R6, â€”OC(O)R4, â€”OC(O)OR4, â€”N&boxH;CR5R6, â€”C(R5)&boxH;NR6, â€”C(R5)&boxH;Nâ€”Oâ€”R6, â€”P(O)(OR4)(OR4), â€”S(O)2R4, â€”S(O)R4, â€”C(O)OC(O)R4, â€”NR4CO2R4, â€”NR4C(O)NR5R6, or â€”CN; each R4 independently is C1 to C12 alkyl or C6 to C20 aryl; each R5 independently is H, C1 to C12 alkyl, or C6 to C20 aryl; each R6 independently is H, C1 to C12 alkyl, or C6 to C20 aryl; Q is a divalent bridging group of the formula: â€ƒwherein: each R7 independently is H, F, Cl, C1 to C12 alkyl, C6 to C20 aryl, â€”OR4, â€”CO2R4, â€”C(O)R4, â€”C(R5)&boxH;Nâ€”Oâ€”R6, â€”CHO, â€”CN, â€”CF3, â€”C(R5)&boxH;NR6, â€”NR5R6 or â€”R3Z; and each R8 is H, F, Cl, C1 to C12 alkyl, C6 to C20 aryl, â€”OR4, â€”CO2R4, â€”C(O)R4, â€”CN, or â€”CF3.