HCID 86648147, compound → HCID 68077525, compound

Participants

Reaction Steps

To a clean dry 1 L RBF charged with tert-butyl [(1R,2S)-2-azido-3,3-difluorocyclohexyl]carbamate 35 (18.84 g, 68.2 mmol) was added 400 mL methanol. The system was degassed and purged (3× with N2) before the addition of Pd/C (1.45 g). The reaction was stirred for 2 d under 1 atm of hydrogen. Upon reaction completion, the reaction was filtered through a plug of celite and concentrated to dryness to yield tert-butyl [(1R,2S)-2-amino-3,3-difluorocyclohexyl]carbamate 38 (16.47 g, 97% yield) as a pure white solid. 1H NMR (CDCl3, 500 MHz) δ 4.76-4.74 (1H, d, J=10 Hz), 3.61-3.56 (1H, m), 2.63-2.59 (1H, dd J=9.5 Hz), 2.2-2.0 (2H, m), 1.8-1.68, (2H, m), 1.53-1.42 (11H, m), 1.29-1.21 (m, 2H); 19F NMR (CDCl3, 564 MHz) δ −101.7-−102.1 (1F, J=241 Hz), −114.3-−114.9 (1F, m)

Provenance & Evidence