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Stereoselective 7α-Hydroxylation of 3β-Acetoxy-δ5-steroids by Fe(PA)3/H2O2/MeCN.-The ferric picolinate-hydrogen peroxideacetonitrile system is reported to be a convenient oxidant for the stereoselective 7α-hydroxylation of several steroids (I). The reaction gives the 7α-hydroxy steroids in moderate yield together with 7-oxo (IV) and epoxysteroids (V) and (VI) the 7β-hydroxy isomers being obtained in traces only. This oxidizing system represents a useful model for the cytochrome P-450 oxidation.-(KOTANI, E.; TAKEYA, T.; EGAWA, H.; TOBINAGA, S.; Chem. Pharm.