反应详情

温度

78 °C

To a stirred solution of phenyl methyl(2-(7-(thiophene-2-carboximidamido)-2H-benzo[b][1,4]thiazin-4(3H)-yl)ethyl)carbamate (65 mg, 0.144 mmol) in ethanol (4 mL) was added sodium hydroxide (57.4 mg, 1.436 mmol) as a solution in water (2 mL). The resulting mixture was heated to 78° C. and stirred overnight. The mixture was then cooled to room temperature, diluted with water and sodium hydroxide, and extracted with dichloromethane (5×). The combined organics were dried, filtered, concentrated, and then chromatographed in 10% (2M NH3 in MeOH) in dichloromethane, giving the desired product (22 mg, 46%). 1H NMR (DMSO-d6) δ 7.69 (d, J=3.3 Hz, 1H), 7.56 (d, J=5.1 Hz, 1H), 7.07 (t, J=4.4 Hz, 1H), 6.72 (d, J=8.7 Hz, 1H), 6.53-6.44 (m, 2H), 6.29 (brs, 2H), 3.54-3.51 (m, 2H), 3.3 (m, 2H), 3.04-3.00 (m, 2H), 2.66 (t, J=6.8 Hz, 2H), 2.32 (s, 3H); MS-EI: (m/z, %) 332 (M+, 75), 288 (97), 260 (100); EI-HRMS calculated for C16H20N4S2 (M+), calculated: 332.1129, observed: 332.1145. HPLC: 95% by area.

1. temperatureThe mixture was then cooled to room temperature
2. extractionextracted with dichloromethane (5×)
3. customThe combined organics were dried
4. filtrationfiltered
5. concentrationconcentrated
6. customchromatographed in 10% (2M NH3 in MeOH) in dichloromethane