Hydrochloric Acid → HCID 131729381, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of (3R,4S,5S)-3-(3-tert-butyl-benzylamino)-5-[3-fluoro-4-nitro-5-(2,2,2-trifluoro-ethoxy)-benzyl]-1,1-dioxo-hexahydro-1lambda*6*-thiopyran-4-ol (0.082 g, 0.166 mol) in MeOH (5 mL) was added NiCl2-6H2O (0.038 g, 0.155 mmol) and at 0° C. NaBH4 (0.024 g, 0.62 mmol) in two portions. After stirring for 1 h at 0-5° C. the reaction was quenched by addition of 1N aq. HCl. The reaction mixture was stirred for 0.5 h at 25° C. and extracted with EtOAc. The combined organic extracts were washed with brine, dried over MgSO4, filtered and concentrated. Chromatographic purification (Combi-Flash, 4 g, hexane-THF 90:10 to 10:90 containing 0.5% NEt3) provided a pure yellow oil which was converted into the hydrochloride salt with 1N HCl in Et2O to yield the title compound as a white amorphous solid: TLC (hexane-THF 2:3) Rf=0.22; HPLC RtA=1.56 min; ESIMS [M+NH4]+=509; 1H NMR (600 MHz, DMSO-d6): δ 9.89 (s, 1H), 9.08 (s, 1H), 7.67 (s, 1H), 7.43 (m, 1H), 7.38 (m, 2H), 6.62 (m, 2H), 6.18 (s, 1H), 4.24 (m, 2H), 4.14 (m, 2H), 3.82 (m, 1H), 3.3-3.7 (m, 5H), 3.29 (s, 3H), 3.24 (m, 2H), 3.03 (dd, 1H), 2.77 (m, 1H), 2.40 (dd, 1H), 2.04 (m, 1H), 1.35 (d, 9H).

Provenance & Evidence