Tetrahydrofuran → HCID 58042438, compound

Participants

Reaction Steps

Sodium hydride (60% oil dispersion, 211 mg, 5.28 mmol) was added to a solution of 5-{[tert-butyl(dimethyl)silyl]oxy}-1H-indazole (Preparation 41, 1.09 g, 4.40 mmol) in THF (10 mL) and stirred at room temperature for 15 minutes. The solution was then heated at 50° C. for 18 hours, then at reflux for 8 hours. The reaction mixture was diluted with EtOAc and washed with water, 0.5 N aqueous citric acid solution and brine, then dried over magnesium sulfate, filtered and concentrated in vacuo. The resulting residue was purified by silica gel chromatography eluting with 0 to 10% EtOAc in heptane to yield the title compound as a clear oil (261 mg, 20%):

Provenance & Evidence