反应详情

温度

55 °C

2-Amino-4,4,4-trifluoro-butyric acid methyl ester hydrochloride (1.1 g, 5.3 mmol) was dissolved in 30 mL of ethanol and 2-(4-bromophenyl)-2-oxoethyl thiocyanate, prepared in step 1 of Example 1, (1.23 g, 4.8 mmol) was added followed by triethylamine (0.73 mL, 5.3 mmol). The mixture was heated to 55° C. for 18 h then cooled and concentrated under reduced pressure. Flash chromatography (5% acetone/hexane) afforded methyl 2-{[4-(4-bromophenyl)-1,3-thiazol-2-yl]amino}-4,4,4-trifluorobutanoate (1.21 g, 56%) as a white solid. mp 113-114° C. HRMS: calcd for C14H12BrF3N2O2S+H+, 408.98277; found (ESI, [M+H]+), 408.9831. Analytical HPLC: retention time 11.5 min, 210-370 nm the Xterra® RP18 column, 3.5μ, 150×4.6 mm 40° C. 85/15-5/95 (Ammon. Form. Buff. pH=3.5/ACN+MeOH) for 10 min, hold 4 min, 1.2 mL/min 5 μL injection.

1. additionwas added
2. temperaturethen cooled
3. concentrationconcentrated under reduced pressure