反应详情

温度

120 °C

2-tert-Butyl-5-phenyl-4-[(4-phenylbutyl)amino]isothiazol-3(2H)-one 1,1-dioxide (Example 1) (0.150 g, 0.364 mmol) was dissolved in TFA (3 mL) and heated in a microwave reactor at 120° C. for 20 mins. TFA was removed in vacuo and the residue was coevaporated with DCM two times. The residue was dissolved in MeCN (3 mL) and it was mixed with bromocyclopentan (0.162 g, 1.09 mmol) and TEA (0.110 g, 1.09 mmol) and the mixture was heated in a microwave reactor at 120° C. for 20 mins, at 160° C. for 85 mins and at 170° C. for 20 mins. The residue was purified by column chromatography (Horizons Biotage) using a 90:10 mixture of hexane and EtOAc as eluant, to give the title compound (0.055 g, 36%); 1H NMR (500 MHz, CDCl3): δ 7.53-7.48 (m, 2H), 7.46-7.41 (m, 3H), 7.31-7.25 (m 2H), 7.22-7.18 (m, 1H), 7.10-7.06 (m, 2H), 5.30-5.24 (br m, 1H), 4.41-4.35 (m, 1H), 2.90-2.83 (m 2H), 2.49-2.43 (m 2H), 2.25-2.17 (m 2H), 2.18-2.09 (m 2H), 1.97-1.87 (m 2H), 1.69-1.60 (m 2H), 1.44-1.36 (m 4H); 13C NMR (125 MHz, CDCl3): δ 159.0, 141.8, 135.6, 131.8, 129.8, 128.8, 128.6, 128.5, 126.2, 125.3, 106.7, 55.2, 44.2, 35.4, 29.5, 29.2, 28.3, 24.3.

1. customTFA was removed in vacuo
2. dissolutionThe residue was dissolved in MeCN (3 mL)
3. temperaturethe mixture was heated in a microwave reactor at 120° C. for 20 mins, at 160° C. for 85 mins and at 170° C. for 20 mins
4. customThe residue was purified by column chromatography (Horizons Biotage)
5. additiona 90:10 mixture of hexane and EtOAc as eluant