Patent ID: 7148362

Claim:
A process for the preparation of a compound of formula I wherein R 21 , R 22 and R 23 are each independently hydrogen or halogen; and R 24 is hydrogen, methyl or halogen; and/or a compound of formula II wherein R 1 is (C 1 –C 8 )-alkyl, (C 2 –C 4 )-alkenyl or a group of formula A R 3 (OCH 2 CH 2 ) n — (A) wherein R 3 is hydrogen or (C 1 –C 4 )-alkyl; and n is 1, 2 or 3; and R 21 , R 22 , R 23 and R 24 have the meanings as defined above, comprising contacting a compound of formula III wherein R 1 , R 21 , R 22 , R 23 and R 24 have the meanings as defined above, with a cholesterase derived from yeast in an aqueous or aqueous-organic system.