Water → HCID 58109123, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of (R)-6-(2-aminoethyl)-3-((S)-1-(2′,4′-difluorobiphenyl-4-yl)ethyl)-6-(4-fluorophenyl)-1,3-oxazinan-2-one (40 mg, 0.088 mmol) and DMAP (4 mg, 10%) in dry CH2Cl2 (3 mL), was added Et3N (27 mg, 0.264 mmol). The resulting mixture was cooled to 0-5° C. under ice-water bath, and a solution of methyl chloroformate (41 mg, 0.44 mmol) in dry CH2Cl2 (1 mL) was added dropwise. After addition, the reaction mixture was stirred for 1-2 h at 0˜5° C. After the starting material was disappeared, water (5 mL) was added. The layers were separated, and the aqueous layer was extracted with CH2Cl2 (3×5 mL). The combined organic layers were washed with 10% citric acid (2×10 mL) and brine, dried over Na2SO4, filtered and concentrated to give the residue, which was purified by preparative HPLC to afford methyl 2-((R)-3-((S)-1-(2′,4′-difluorobiphenyl-4-yl)ethyl)-6-(4-fluorophenyl)-2-oxo-1,3-oxazinan-6-yl)ethylcarbamate (10 mg, 22%). 1H NMR (CDCl3): 1.50 (m, 3H), 2.06 (m, 2H), 2.10-2.32 (m, 4H), 3.10 (m, 1H), 3.05-3.20 (m, 2H), 3.55 (s, 3H), 4.88 (s, 1H), 5.63 (m, 1H), 6.80-6.90 (m, 2H), 6.92-7.01 (m, 4H), 7.21 (m, 1H), 7.25 (m, 4H).

Provenance & Evidence