Patent ID: 8106227

Claim:
A compound of the formula I in the form of an enantiomerically pure diastereomer or a mixture of diastereomers, where the radicals R 1 are identical or different and are each C 1 -C 4 -alkyl; m is 0 or an integer from 1 to 3; n is 0 or an integer from 1 to 4; R 2 is a hydrocarbon radical or a C-bonded heterohydrocarbon radical; Cp is unsubstituted or C 1 -C 4 -alkyl-substituted cyclopentadienyl; Y is —HC*R 5 R 6 (wherein * denotes the asymmetric atom), wherein R 5 is C 1 -C 8 -alkyl, C 5 -C 8 -cycloalkyl, C 6 -C 10 -aryl, C 7 -C 12 -aralkyl or C 7 -C 12 -alkaryl, R 6 is —OR 7 or —NR 8 R 9 , R 7 is C 1 -C 8 -alkyl, C 5 -C 8 -cycloalkyl, phenyl or benzyl and R 8 and R 9 are identical or different and are each C 1 -C 8 -alkyl, C 5 -C 8 -cycloalkyl, phenyl or benzyl or R 8 and R 9 together with the N atom form a five- to eight-membered ring; and Phos is a secondary phosphino group containing linear or branched C 1 -C 12 -alkyl; unsubstituted or C 1 -C 6 -alkyl- or C 1 -C 6 -alkoxy-substituted C 5 -C 12 -cycloalkyl or C 5 -C 12 -cycloalkyl-CH 2 —; C 6 -C 14 -aryl; C 4 -C 12 -heteroaryl; C 7 -C 14 -aralkyl; C 4 -C 12 -heteroaralkyl; or halogen- (fluorine-, chlorine- or bromine-), C 1 -C 6 -alkyl-, trifluoromethyl-, C 1 -C 6 -alkoxy-, trifluoromethoxy-, (C 6 H 5 ) 3 Si—, (C 1 -C 12 -alkyl) 3 Si— or sec-amino-substituted C 6 -C 14 -aryl, C 4 -C 12 -heteroaryl, C 7 -C 14 -aralkyl or C 4 -C 12 -heteroaralkyl and heteroaryl and heteroaralkyl contain heteroatoms selected from the group consisting of O, S and —N═.