Patent ID: 7863447

Claim:
A compound of the formula I or Iâ€², where the radicals R 1 are each, independently of one another, a hydrogen atom or C 1 -C 4 -alkyl and Râ€² 1 is C 1 -C 4 -alkyl; X 1 and X 2 are each, independently of one another, a sec-phosphino group; R 2 is (1) hydrogen, (2) R 01 R 02 R 03 Siâ€”, (3) C 1 -C 18 -acyl substituted with halogen, hydroxyl, C 1 -C 8 -alkoxy or R 04 R 05 Nâ€”, or (4) R 06 â€”X 01 â€”C(O)â€”; R 01 , R 02 and R 03 are each, independently of one another, C 1 -C 12 -alkyl, unsubstituted or C 1 -C 4 -alkyl- or C 1 -C 4 -alkoxy-substituted C 6 -C 10 -aryl or C 7 -C 12 -aralkyl; R 04 and R 05 are each, independently of one another, hydrogen, C 1 -C 12 -alkyl, C 3 -C 8 -cycloalkyl, C 6 -C 10 -aryl or C 7 -C 12 -aralkyl, or R 04 and R 05 together are trimethylene, tetramethylene, pentamethylene or 3-oxapentylene; R 06 is C 1 -C 18 -alkyl unsubstituted or C 1 -C 4 -alkyl- or C 1 -C 4 -alkoxy-substituted C 3 -C 8 -cycloalkyl, C 6 -C 10 -aryl or C 7 -C 12 -aralkyl; X 01 is â€”Oâ€” or â€”NHâ€”; T is C-bonded C 3 -C 20 -heteroarylene; v is 0 or an integer from 1 to 4; X 1 in the heteroring of the heteroarylene is bound in the ortho position relative to the Tâ€”C* bond; and * indicates a mixture of racemic or enantiomerically pure diastereomers or pure racemic or enantiomerically pure diastereomers.