Chiral C2-symmetric biphenyls, preparation thereof as well as metal complexes containing these ligands and the use as catalysts in chirogene synthesis

摘要

Chiral symmetric biphenyl compounds (I), are new. Chiral symmetric biphenyl compounds of formula (I), are new. R1>, R2>H; R3>, R4>H, F, 1-10C alkyl or CF3; Y : divalent radical (CR9>2, CHR9>, (cis)-CH=CH, CR9>2CR10>2, CHR9>CHR10>, 1,2-arylene, CHR9>-O-CHR10> or CR9>2-O-CR10>2; Q : F, Cl, Br, I, CN, NO2, -NR7>R8>, -NR7>OR8>, -OR7>, -C(O)R7>, SR7>, -SO3R7>, -C(O)OR7>, -C(O)NR7>R8>, -OC(O)R7> or -NR7>C(O)R8>; R9>, R10>1-10C alkyl (mono, poly or unsubstituted (all optionally substituted by Q)), 3-10C cycloalkyl, 2-10C alkenyl, 4-10C cycloalkenyl, 2-10C alkynyl, 6-15C aryl, 1-15C heteroaryl, Q or H; R7>, R8>R9>; and R5>, R6>3-10C cycloalkyls (mono, poly or unsubstituted (all optionally substituted by Q)), 4-10C cycloalkenyl, 5-15C aryls or 1-15C heteroaryl. Independent claims are also included for: (1) the preparation of (I); (2) a biphenyl compound of formula (II); (3) preparing enantiomerically pure or enantiomerically enriched (II) by fractional crystallization of (II) in the presence of a complexing chiral compound; (4) preparing enantiomerically pure or enantiomerically enriched (I) by converting (II) into chiral palladium complexes; (5) a phosphine compound of formula (IIIa) and benzyl iodide compound of formula (IIIb); (6) a phenyl compound of formula (IV); (7) a complex (A) comprising a ligand of (I) and a metallic center; (8) preparing (A) comprising reacting (I) with a precursor containing the metallic center, in the presence of an organic solvent; an organic synthesis in which a metal complex catalyst is employed, where the improvement comprises selecting (A) as a catalyst; and (9) hydrogenating C=O, C=C or C=N groups in a substrate comprising hydrogenating in the presence of (A). X : halo. Provided that in (IV), CR3>2-Y-CR4>2 cannot be (CH2)3, when X is Br. [Image] [Image].