反应详情

4-|cis-2,6-Dimethyl-4-(4-trifluoromethoxy-phenyl)-piperazine-1-sulfonyl|-indan-2-carboxylic acid amide. Thionyl chloride (42 μL, 0.577 mmol) was added to 4-[cis-2,6-dimethyl-4-(4-trifluoromethoxyphenyl)-piperazine-1-sulfonyl]-indan-2-carboxylic acid (250 mg, 0.502 mmol) in THF (4 mL) at 50 C for 1 h and then concentrated. The crude mixture was then dissolved in THF (4 mL) and ammonium hydroxide (300 μL) was added. The cloudy brown solution was stirred for an additional 3 h at room temperature. The solution was then concentrated and purified by silica gel column chromatography (0-20% MeOH in dichloromethane) to afford 4-[cis-2,6-dimethyl-4-(4-trifluoromethoxy-phenyl)-piperazine-1-sulfonyl]-indan-2-carboxylic acid amide (190 mg, 76%). 1H NMR (400 MHz, CD3OD) δ ppm. 7.71 (d, 1H), 7.47 (d, 1H), 7.34 (t, 1H), 7.10 (d, 2H), 6.94-6.91 (m, 2H), 4.20-4.14 (m, 1H), 4.05-3.90 (m, 1H), 3.54 (d, 2H), 3.41-3.21 (m, 5H), 2.77 (dd, 1H), 2.68 (dd, 1H), 1.51 (d, 3H), 1.49 (d, 3H). LCMS: 498.7 (M+1)+.

1. concentrationconcentrated
2. dissolutionThe crude mixture was then dissolved in THF (4 mL)
3. additionammonium hydroxide (300 μL) was added
4. concentrationThe solution was then concentrated
5. custompurified by silica gel column chromatography (0-20% MeOH in dichloromethane)