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The synthesis of enantiomerically pure (S)-4-formyl-[2.2]paracyclophane 1 (>99% ee) and (R)-4-hydroxymethyl-[2.2]paracyclophane 2 (>78% ee) was achieved by bioreduction of (RS)-1 with a yield of 49 and 34% respectively. From several microorganisms screened only a strain of the yeast Saccharomyces cerevisiae (DSM 11285) showed a stereospecific reduction of this planar chiral substrate (E>100)...
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