反应详情

To a microwave vial equipped with a stirbar and charged with N-methyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazol-2-amine (0.22 g, 0.75 mmol), cesium carbonate (0.67 g, 2.1 mmol), PdCl2(dppf)*DCM (0.10 g, 0.12 mmol), N-(5-bromo-2-chloropyridin-3-yl)-4-fluorobenzenesulfonamide (0.250 g, 0.68 mmol) was added THF (3 ml). Then water (0.5 ml) was added into the mixture. The vial was capped and then placed into a CEM Microwave for 10 minutes at 100° C., while 100 watts of energy was supplied via Powermax® (Simultaneous heating while cooling technology). The progress of the reaction was monitored by LC/MS, which showed desired material in the mixture. The organic layer was extracted from the microwave vial by pipet and then diluted the organic with acetonitrile (15 ml) and TFA (0.1 ml). The crude was purified by reverse-phase HPLC. This gave N-(2-chloro-5-(2-(methylamino)benzo[d]thiazol-6-yl)pyridin-3-yl)-4-fluorobenzenesulfonamide (0.065 g, 21% yield) as a yellow crystalline solid. MS (ESI pos. ion) m/z: 449 (MH+). Calc'd exact mass for C19H14ClFN4O2S2: 448. 1H NMR (400 MHz, DMSO-d6): 2.97 (d, J=3.51 Hz, 3H), 7.42 (t, J=8.78 Hz, 2H), 7.46-7.53 (m, 2H), 7.81 (dd, J=8.53, 5.02 Hz, 2H), 7.94 (s, 1H), 8.03 (s, 1H), 8.13 (d, J=4.02 Hz, 1H), 8.54 (s, 1H), 10.45 (s, 1H).

1. customTo a microwave vial equipped with a stirbar
2. customThe vial was capped
3. temperaturewas supplied via Powermax® (Simultaneous heating while cooling technology)
4. extractionThe organic layer was extracted from the microwave vial by pipet
5. additiondiluted the organic with acetonitrile (15 ml) and TFA (0.1 ml)
6. customThe crude was purified by reverse-phase HPLC