Chiral silicon groups as auxiliaries for enantioselective synthesis: access to optically active silanes by biotransformation and the enantiospecific preparation of (R)-(+)-1-phenylethanol
The synthesis of the opticallyactive alkoxymethyl-substituted acetylsilanes (+)-3 and (−)-b was achieved by the bioreduction of (±)-3 with resting cells of Trigonopsis variabilis to the diastereoisomeric alcohols (+)-4 and (+)-5. These two compounds were separated by chromatography and separately reoxidized to the desired opticallyactive silyl ketones. As a simple example of the use of chiral al