Patent ID: 7612240

Claim:
Process for preparing compounds of the formula (I) in which * is a stereogenic center, X is Cl, Br, or I, R 1 and R 4 are each independently (C 1 -C 8 )-alkyl, (C 1 -C 8 )-alkoxy, HO—(C 1 -C 8 )-alkyl, (C 2 -C 8 )-alkoxyalkyl,(C 6 -C 18 )-aryl, (C 7 -C 19 )-aralkyl, (C 3 -C 18 )-heteroaryl, (C 4 -C 19 )-heteroaralkyl, (C 1 -C 8 )-alkyl-(C 6 -C 18 )-aryl, (C 1 -C 8 )-alkyl-(C 3 -C 18 )-heteroaryl, (C 3 -C 8 )-cycloalkyl, (C 1 -C 8 )-alkyl-(C 3 -C 8 )-cycloalkyl, or (C 3 -C 8 )-cycloalkyl-(C 1 -C 8 )-alkyl, R 2 , R 3 are each independently R 1 , OH or H, or (a) R 1 and R 2 form a (C 3 -C 5 )-alkylene bridge together, (b) R 2 and R 3 form a (C 3 -C 5 )-alkylene bridge together, (c) R 1 and R 3 form a (C 3 -C 5 )-alkylene bridge together, or (d) R 2 and R 4 form a (C 3 -C 5 )-alkylene bridge together, wherein compounds of the formula (II) in which *, R 1 , R 2 , R 3 , R 4 are each as defined above, R, R′, R″ may each independently be R 1 , are reacted with halogenated compounds selected from the group consisting of halocarbon compounds which lack double bonds in which the ratio of carbon atoms to halogen atoms is 1:≧2.5, CCl 3 CN, CCl 3 COOEt, CCl (3-x) H x C(═O)Cl, C 2 Cl 4 Br 2 , Cl 2 , Br 2 , I 2 .