Chem 634 Prof Fox Problem Set 2 answers Spring 2004 O OH Bu2 CuLi O CrO3 cat KOtBu epimerization OH NaCN DIBAL Br L selectride MgBr O OH CHO CH3 CH3 Felkin 1 CrO3 2 L selectride OH CH3 H OH H H HO H S O bulky selectride delivers from the equatorial face axial delivery for small nucleophiles controlled by torsional considerations OCO H 2 H O Br S Br O S
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