反应详情

温度

140 °C

To 4-(4-chloro-2-methyl-phenyl)-3-[2-[(4-methoxyphenyl)methyl]pyrazol-3-yl]-1-methyl-4,6,7,8-tetrahydropyrazolo[3,4-e][1,4]thiazepine (0.32 g, 0.67 mmol, prepared using A with ethyl 1-(4-methoxybenzyl)-1H-pyrazole-5-carboxylate (WO2011079076), B with methylhydrazine, C with thioglycolic acid and 4-chloro-2-methylbenzaldehyde (Fluorochem) and D) was added trifluoroacetic acid (5 mL). The resulting mixture was heated, in a sealed microwave vessel, for about 10 min, at about 140° C., in a microwave. After cooling to rt the mixture was made basic (pH ˜8) with 2 M aqueous NaOH and extracted with ethyl acetate. The organic layer was dried (MgSO4), filtered and concentrated in vacuo. The resulting residue was purified by column chromatography (SiO2, ethyl acetate) to give 4-(4-chloro-2-methyl-phenyl)-1-methyl-3-(1H-pyrazol-3 or 5-yl)-4,6,7,8-tetrahydropyrazolo[3,4-e][1,4]thiazepine (0.151 g, 0.42 mmol, 63%) as an off white solid: LC-MS (Table 1, Method e) Rt=2.83 min, m/z 360 (M+H)+; 1H-NMR (CDCl3, Bruker 400 MHz) 2.54 (3H, s) 2.64-2.72 (1H, m) 2.77-2.86 (1H, m) 3.21-3.31 (1H, m) 3.54-3.63 (1H, m) 3.77-3.83 (1H, br s) 3.81 (3H, s) 5.69 (1H, br. S.) 6.18 (1H, br s) 7.04 (1H, dd, J=8.5, 2.0 Hz) 7.08 (1H, d, J=8.5 Hz) 7.20 (1H, br s) 7.47 (1H, d, J=2.0 Hz) 10.1 (1H, br s).

1. temperatureAfter cooling to rt the mixture
2. extractionextracted with ethyl acetate
3. dry with materialThe organic layer was dried (MgSO4)
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe resulting residue was purified by column chromatography (SiO2, ethyl acetate)