反应详情

温度

80 °C

A mixture of methyl 2-[5-(3-{[5-(aminocarbonothioyl)-2-pyridinyl]oxy}propoxy)-1H-indol-1-yl]propanoate (Example 68, 0.1 g, 0.24 mmol) and 1-bromo-2-butanone (0.05 g, 0.29 mmol) in ethanol (8.90 mL) was heated under argon at 80° C. for 3 h. The resulting mixture was concentrated. The title compound (0.11 g, 98%) was isolated by column chromatography (2:1 hexanes/EtOAc). 1H NMR (400 MHz, CD2Cl2) δ 8.69 (dd, 1H), 8.13 (dd, 1H), 7.25-7.10 (m, 3H), 6.90-6.81 (m, 3H), 6.47 (d, 1H), 5.12 (qt, 1H), 4.58 (t, 2H), 4.20 (t, 2H), 3.71 (s, 3H), 2.85 (qt, 2H), 2.36-2.24 (m, 2H), 1.82 (d, 3H), 1.35 (t, 3H).

1. concentrationThe resulting mixture was concentrated