Trifluoroacetic acid → Trifluoroacetic acid

Participants

Reaction Steps

To a solution of tert-butyl [(1R)-2-(4-fluorophenyl)-1-(5-{2-{(2-methoxyethyl)[(trans-2-methylcyclopropyl)methyl]amino}-6-[methyl(methylsulfonyl)amino]pyridin-4-yl}-1,3,4-oxadiazol-2-yl)-1-methyl-2-phenylethyl]carbamate (11.58 g, 17.9 mmol) in DCM (75 mL) cooled to 0° C. was added TFA (25 mL) and the reaction mixture was stirred at rt for 16 h, concentrated in vacuo, and reconcentrated several times from DCM, to give N-(4-{5-[(1R)-1-amino-2-(4-fluorophenyl)-1-methylethyl]-1,3,4-oxadiazol-2-yl}-6-{(2-methoxyethyl)[(trans-2-methylcyclopropyl)methyl]amino}pyridin-2-yl)-N-methylmethanesulfonamide as a TFA salt. MS M+1=547. 1H NMR (400 MHz, CD3OD) δ 7.10 (m, 5H), 7.01 (s, 1H), 3.82 (t, J=5.86 Hz, 2H), 3.64 (t, J=5.86, 2H), 3.50 (AB overlapping m, 4H), 3.39 (s, 3H), 3.35 (s, 3H), 3.18 (s, 3H), 1.88 (s, 3H), 1.05 (d, J=5.86, 3H), 0.78 (m, 2H), 0.49 (m, 1H), 0.30 (m, 1H).

Provenance & Evidence