Dihydroxylation Diimide

Commercially available enantiopure acetate 30 was aminated with sodium di-tert-butyloxy diimide by palladium catalyst to give bis-Boc amide 31, which was quantitatively dihydroxylated by using catalytic osmium tetraoxide and A -methyl morpholine A -oxide (NMO) in THF/water resulting in the cw-diol 32. The free base 33 was liberated from 32 by concentrated... 

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