Lithium borohydride → HCID 57947907, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of (S)-methyl 4-(tert-butoxycarbonyl(methyl)amino)-5-(tert-butoxycarbonyloxy)-2,2-difluoropentanoate (42.0 g, 0.106 mol) in THF (300 mL) was added Lithium borohydride (79.3 mL, 2 M, 0.159 mol) in THF at 0° C. The reaction mixture was stirred at 0° C. for 1 h and at RT for 2 h. LC-MS showed the reaction was complete. The reaction mixture was concentrated and partitioned between EtOAc and H2O. After separating layers, the aqueous layer was extracted further with EtOAc. The combined organic layers were dried (Na2SO4), filtered, and concentrated, and the resulting residue was purified by silica gel column (hexanes/EtOAc) to give (S)-tert-butyl 1-(tert-butoxycarbonyloxy)-4,4-difluoro-5-hydroxypentan-2-yl(methyl)carbamate (35.3 g, 90%). LRMS (M+Na+) m/z 392.4.

Provenance & Evidence