Chiral monophosphorus compounds

Chiral monophosphorus compounds selected from the group consisting of

• (S)-5,5′-Dichloro-6,6′-dimethoxy-1,1′-biphenyl-2,2′-diyl isopropyl phosphite,
• (R)-5,5′-dichloro-6,6′-dimethoxy-1,1′-biphenyl-2,2′-diyl isopropyl phosphite,
• (R)-5,5′-dichloro-6,6′-dimethoxy-1,1′-biphenyl-2,2′-diyl (R)-1-phenylethyl phosphite,
• (R)-5,5′-dichloro-6,6′-dimethoxy-1,1′-biphenyl-2,2′-diyl (S)-1-phenylethyl phosphite,
• (S)-5,5′-dichloro-6,6′-dimethoxy-1,1′-biphenyl-2,2′-diyl (R)-1-phenylethyl phosphite,
• (S)-5,5′-dichloro-6,6′-dimethoxy-1,1′-biphenyl-2,2′-diyl (S)-1-phenylethyl phosphite,
• (S)-5,5′-dichloro-6,6′-dimethoxy-1,1′-biphenyl-2,2′-diyl cyclohexyl phosphite,
• (R)-5,5′-dichloro-6,6′-dimethoxy-1,1′-biphenyl-2,2′-diyl cyclohexyl phosphite,
• (S)-5,5′-dichloro-6,6′-dimethoxy-1,1′-biphenyl-2,2′-diyl phenyl phosphite,
• (R)-5,5′-dichloro-6,6′-dimethoxy-1,1′-biphenyl-2,2′-diyl phenyl phosphite,
• (S)-5,5′-dichloro-6,6′-dimethoxy-1,1′-biphenyl-2,2′-diyl 2,6-dimethylphenyl phosphite,
• (R)-5,5′-dichloro--6,6′-dimethoxy-1,1′-biphenyl-2,2′-diyl 2,6-dimethylphenyl phosphite,
• (S)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl isopropyl phosphite,
• (R)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl isopropyl phosphite,
• (S)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl (rac)-1-phenylethyl phosphite,
• (R)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl (rac)-1-phenylethyl phosphite,
• (S)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl (S)-1-phenylethyl phosphite,
• (R)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl (S)-1-phenylethyl phosphite,
• (S)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl (R)-1-phenylethyl phosphite,
• (R)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl (R)-1-phenylethyl phosphite,
• (S)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl diphenylmethyl phosphite,
• (R)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl diphenylmethyl phosphite,
• (S)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl methyl phosphite,
• (R)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl methyl phosphite,
• (S)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl 2,6-dimethylphenyl phosphite,
• (R)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl 2,6-dimethylphenyl phosphite,
• (S)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl 2,6-diisopropylphenyl phosphite,
• (R)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl 2,6-diisopropylphenyl phosphite,
• (S)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl phenyl phosphite,
• (R)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl phenyl phosphite,
• (S)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl ethyl phosphite,
• (R)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl ethyl phosphite
• (S)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl 4-tert-butylphenyl phosphite and
• (R)-5,5′,6,6′-tetramethyl-3,3′-bis(tert-butyl)-1,1′-biphenyl-2,2′-diyl 4-tert-butylphenyl phosphite.

Catalysts comprising transition metal complexes of chiral monophosphorus compounds of the general formula (I),

• 19
• where
• R1 is an unsubstituted or substituted 1,1′-biphenyl-2,2′-diyl radical and
• R2 is a radical selected from the group consisting of substituted or unsubstituted alkyl, substituted or unsubstituted aryl, substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy and tertiary amino.