Dichloromethane → (3R,3aR,6S,6aR)-N6-[6-chloro-5-(4-phenylphenyl)-1H-imidazo[4,5-b]pyridin-2-yl]-2,3,3a,5,6,6a-hexahydrofuro[3,2-b]furan-3,6-diamine 2,2,2-trifluoroacetic acid

Participants

Reaction Steps

Tert-butyl N-[(3S,3aR,6R,6aR)-3-[[6-chloro-5-(4-phenylphenyl)-1-(2-trimethylsilylethoxy-methyl)imidazo[4,5-b]pyridin-2-yl]amino]-2,3,3a,5,6,6a-hexahydrofuro[3,2-b]furan-6-yl]carbamate (1.1 mg, 0.0016 mmol) was dissolved in TFA (0.2 mL) and DCM (0.5 mL) and stirred at room temperature for 1 hour. Then the reaction mixture was evaporated to give an oil, which was dissolved in methanol (0.5 mL) and purified by preparative HPLC reverse phase (C-18), using a 30×150 mm Sunfire™ column and eluting with a 20%-80% acetonitrile/water+0.05% TFA gradient. The desired fractions were lyophilized to give the title compound as a solid. Major isomer LC-MS: calculated for C24H22ClN5O2 447.15 observed m/e: 448.24 (M+H)+ (Rt 0.96/2 min); 1H NMR δ (ppm) (CD3OD): 7.82 (s, 1H), 7.76 (ABq, 4H), 7.71 (d, 2H), 7.49 (dd, 2H), 7.39 (dd, 1H), 4.90 (m, 1H), 4.79 (d, 1H), 4.52 (br d, 1H), 4.28 (dd, 1H), 4.20-4.12 (m, 2H), 3.96 (m, 1H) and 3.82 (dd, 1H).

Provenance & Evidence