反应详情

温度

60 °C

Excess amount of potassium carbonate (150 mg, 1.1 mmol) and excess amount of methyl iodide (0.040 ml, 0.064 mmol) were mixed with N-(4-(3,5-bis(trifluoromethyl)benzyloxy)-3-hydroxy-3-phenylbutyl)-2,2,2-trifluoroacetamide (15 mg, 0.030 mmol) in acetone (2 ml). The reaction mixture was heated in microwave at 60° C. for 10 minutes. The salt precipitate was filtered off and the filtrate was concentrated. The residue was purified by preparative HPLC to give the desired N-methylacetamide. 1H NMR (300 MHz, MeOH) δ ppm 7.84 (s, 3 H) 7.46–7.54 (m, 2 H) 7.35 (ddd, J=8.14, 6.50, 4.76 Hz, 2 H) 7.22–7.30 (m, 1 H) 4.61–4.73 (m, 2 H) 3.62–3.75 (m, 2 H) 3.40–3.55 (m, 1 H) 3.11–3.37 (m, 1 H) 3.01 (s, 2 H) 2.93 (s, 1 H) 2.15–2.31 (m, 2 H); LRMS [ESI, (MH+−H2O)] m/z calcd for C22H19NO2F9 500.13, found 499.97.

1. filtrationThe salt precipitate was filtered off
2. concentrationthe filtrate was concentrated
3. customThe residue was purified by preparative HPLC