反应详情

Tetrakis(triphenylphosphine)palladium (0) (60 mg) was added to a deoxygenated solution of sodium carbonate (233 mg), 1,4-benzenediboronic acid (165 mg), 2-chloropyrimidine (114.5 mg) and 2-chloro-N-(isobutoxycarbonyl)-N-(3-methoxy-5-methylpyrazin-2-yl)pyridine-3-sulphonamide (414 mg) in a mixture of water (1.6 ml), ethanol (4 ml) and toluene (8 ml). The mixture was stirred and heated under argon under reflux for 16 hours and then allowed to cool to ambient temperature. Water (15 ml) was added and the mixture was extracted with ethyl acetate (2×20 ml). The combined organic layers were washed with saturated sodium chloride solution and dried (MgSO4). Volatile material was removed by evaporation and the residue was purified by chromatography on a silica gel Mega Bond Elut column, eluting with 25-100% ethyl acetate/hexane to give N-isobutoxycarbonyl-N-(3-methoxy-5-methylpyrazin-2-yl)-2-(4-[pyrimidin-2-yl]phenyl)pyridine-3-sulphonamide (95 mg) as a solid, mass spectrum (+ve ESP): 535 (M+H)+.

1. temperatureheated under argon
2. temperatureunder reflux for 16 hours
3. extractionthe mixture was extracted with ethyl acetate (2×20 ml)
4. washThe combined organic layers were washed with saturated sodium chloride solution
5. dry with materialdried (MgSO4)
6. customVolatile material was removed by evaporation
7. customthe residue was purified by chromatography on a silica gel Mega Bond Elut column
8. washeluting with 25-100% ethyl acetate/hexane