反应详情

To a degassed solution of 400 mg (1.08 mmol) 3-chloro-5-(1,3-dioxan-2-yl)-1-{[2-(trimethylsilyl)-ethoxy]methyl}-1H-indazole (Example 45A) and 135 mg (1.52 mmol) 3-methoxy-N-methyl-propanamine in anhydrous THF (11 ml) were added under inert gas atmosphere 103 mg (0.22 mmol) 2-(dicyclohexylphosphino)-2′,4′,6′-triisopropyl-1,1′-biphenyl (XPhos), 50 mg (0.054 mmol) tris(dibenzylideneacetone)dipalladium(0) (Pd2dba3) and 5.42 ml (5.42 mmol) lithium hexamethyldisilazide solution (1 M in THF). The resulting mixture was stirred under reflux for 12 h. After cooling to room temperature and concentration under reduced pressure, the remaining solid was dissolved in ethyl acetate (20 ml). The solution was washed with water and with brine, dried over sodium sulfate and concentrated under reduced pressure. The crude product was purified by preparative RP-HPLC (acetonitrile/water gradient, final mixture 90:10 v/v) to yield the title compound as a white solid (187 mg, 24% of th.).

1. temperatureunder reflux for 12 h
2. concentrationconcentration under reduced pressure
3. dissolutionthe remaining solid was dissolved in ethyl acetate (20 ml)
4. washThe solution was washed with water and with brine
5. dry with materialdried over sodium sulfate
6. concentrationconcentrated under reduced pressure
7. customThe crude product was purified by preparative RP-HPLC (acetonitrile/water gradient, final mixture 90:10 v/v)