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Cobalt‐catalyzed hydrogenation of internal epoxides. Reaction condition: 1 (0.5 mmol), Co(NTf2)2 (3.0 mol %), triphos (6.0 mol %), Zn(OTf)2 (7.0 mol %), THF, 80 °C, 16 h. [a] The diastereoisomer ratio is 1:1.1. [b] Co(BF4)2⋅6 H2O (3.0 mol %), 1,4‐dioxane, 60 °C, 20 h, the diastereoisomer ratio (2.8:1) and yield were determined by GC analysis.
