Synthesis of 5‐Androstene‐3 β ,7 α ,17 β ‐triol and 5‐Androstene‐3 β ,7 β ,17 β ‐triol

Two important neuroactive steroids 5‐androstene‐3 β ,7 α ,17 β ‐triol ( 6 ) and 5‐androstene‐3 β ,7 β ,17 β ‐triol ( 7 ) were prepared through a microbial transformation of 5‐androstene‐3 β ,17 β ‐diol, which was the first report for the synthesis of compounds 6 and 7 through a microbial transformation with Mucor racemosu isolated by ourselves.