Patent ID: 7193092

Claim:
A chiral compound of the formula (XIII), where R 1 and R 2 may each independently be: hydrogen, C 1 –C 20 -alkyl, C 1 –C 20 -fluoroalkyl, C 2 –C 20 -alkenyl, C 4 –C 24 -aryl, C 5 –C 25 -arylalkyl, C 6 –C 26 -arylalkenyl or NR 7 R 8 , OR 8 , —(C 1 –C 8 -alkyl)-OR 8 , —(C 1 –C 8 -alkyl)-NR 7 R 8 or —O 2 CR 8 where R 7 and R 8 are each independently C 1 –C 8 -alkyl, C 5 –C 14 -arylalkyl or C 4 –C 15 -aryl, or R 7 and R 8 together are a cyclic amino radical having a total of 4 to 20 carbon atoms, or R 1 and R 2 are each independently radicals of the formula (II) —R 9 —SiR 10 R 11 R 12 (II) where R 9 is absent, or is oxygen or methylene and R 10 , R 11 and R 12 are each independently C 1 –C 12 -alkyl, C 5 –C 15 -arylalkyl or C 4 –C 14 -aryl and R 3 , R 4 , R 5 and R 6 are each independently R 13 , OR 14 or NR 15 R 16 where R 13 , R 14 , R 15 and R 16 are each independently C 1 –C 12 -alkyl, C 5 –C 15 -arylalkyl or C 4 –C 14 -aryl, or NR 15 R 16 together is a cyclic amino radical having 4 to 20 carbon atoms, or R 3 and R 4 and/or R 5 and R 6 in each case together are —O—R 17 —O— where R 17 is a radical selected from the group of C 2 –C 4 -alkylene, 1,2-phenylene, 1,3-phenylene, 1,2-cyclohexylene, 1,1′-ferrocenylene, 1,2-ferrocenylene, 2,2′-(1,1′-binaphthylene), 2,2′-(1,1′)-biphenylene and 1,1′-(diphenyl-2,2′-methylene)-diyl, and the radicals mentioned may optionally be mono- or polysubstituted by radicals selected from the group of fluorine, chlorine, C 1 –C 8 -alkoxy and C 1 –C 8 -alkyl.