反应详情

温度

80 °C

DMF (3 mL) and 2M aqueous Na2CO3 (0.38 mL, 0.76 mmol) were added to a nitrogen flushed flask containing tert-butyl 2-(4-chlorophenyl)-2-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]isothiazol-3-yl)ethylcarbamate (150 mg, 0.291 mmol), (5R,7R)-4-chloro-5-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-7-yl 4-nitrobenzoate (117 mg, 0.350 mmol) and dichloro[1,1′-bis(diphenylphosphino)-ferrocene]palladium(II) dichloromethane adduct (12 mg, 0.015 mmol). The mixture was heated at 80° C. for 1 hour. The mixture was cooled to room temperature and partitioned between EtOAc and water. The combined organic layers were washed with saturated aqueous NaHCO3 and brine, dried and concentrated. The residue was purified by flash chromatography on silica gel, eluting with hexanes:EtOAc (4:1 to 1:1) to give (5R,7R)-4-(3-(2-(tert-butoxycarbonylamino)-1-(4-chlorophenyl)ethyl)benzo[d]isothiazol-6-yl)-5-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-7-yl 4-nitrobenzoate (102 mg, 51%) as an oil. LCMS (APCI+) m/z 630, 632 [M+H]+; Rt=4.68 min.

1. temperatureThe mixture was cooled to room temperature
2. custompartitioned between EtOAc and water
3. washThe combined organic layers were washed with saturated aqueous NaHCO3 and brine
4. customdried
5. concentrationconcentrated
6. customThe residue was purified by flash chromatography on silica gel
7. washeluting with hexanes:EtOAc (4:1 to 1:1)