Sodium hydride → 4-[2-(4-Methoxy-benzyl)-1-oxo-7-phenyl-1,2-dihydro-isoquinolin-6-yloxy]-piperidine-1-carboxylic acid tert-butyl ester

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Reaction Steps

168 mg (0.83 mmol) 4-hydroxy-piperidine-1-carboxylic acid tert-butyl ester were dissolved in 5 mL of dimethylacetamide and 20 mg (0.83 mmol) of sodium hydride (60%) were added. The mixture was stirred at room temperature. After 30 minutes a solution of 240 mg (0.67 mmol) 6-fluoro-2-(4-methoxy-benzyl)-7-phenyl-2H-iso-quinolin-1-one (315) in 5 mL of dimethylacetamide was added and stirring was continued at room temperature. After standing overnight, 20 mg (0.83 mmol) of sodium hydride (60%) were added and the solution was stirred at 100° C. After 1 h, the solvent was removed i. vac. and saturated sodium bicarbonate solution was added. The aqueous phase was extracted three times with dichloromethane. The organic layers were dried with MgSO4 and evaporated. The crude product was purified by preparative HPLC. Rt=1.98 min (Method C). Detected mass: 541.7 (M+H+).

Provenance & Evidence