Process for the stereoselective microbial reduction of 4 - (3,4-dichlorophenyl) - dihydro - 1 (2H) - naftalenona racmica in a mixture of CIS and trans tetraloles,Comprising contacting the compound with a micro organism or Enzyme System Reduction, incubate the mixture, and recovering the enantiomer (S) of the compound.

摘要

The present invention relates to processes for carrying out the following stereoselective microbial reduction of a racemic tetralone: CHEM which comprises: contacting a compound of formula (I) with a microorganism, or an enzyme reduction system capable of accomplishing the subject reduction comprising an enzyme derived from said microorganism and a co-factor for said enzyme, and incubating the resulting mixture under conditions sufficient to yield the (4R) tetralol of formula (II) and to leave substantially unreacted the (4S) tetralone of formula (V) or "chiral tetralone." The chiral tetralone can be used in the synthesis of sertraline. The subject process further optionally comprises the separation of the (4S) tetralone of formula (V) from the (4R) tetralol of formula (II). The (4R) tetralol can be recycled to produce the compound of formula (I) and the subject process repeated to result in even more of the desired (4S) tetralone of formula (V).