Cesium carbonate → 6-Bromo-2-(3-{[tert-butyl(dimethyl)silyl]oxy}-2,2-dimethylpropyl)isoquinolin-1(2H)-one

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Reaction Steps

Cesium carbonate (53.3 g) and (3-bromo-2,2-dimethylpropoxy)(tert-butyl)dimethylsilane (27.62 g) were added to a solution of 6-bromoisoquinolin-1(2H)-one (Example 26a, 18.33 g) in DMF (125 mL) with stirring at room temperature under nitrogen. The resulting mixture was stirred at 100° C. for 6 h, diluted with water (300 mL), and extracted with diethyl ether (300 mL×3). The combined organic extracts were dried (MgSO4), filtered and evaporated.

Provenance & Evidence