Ammonium formate → N-(2-{6,6-dimethyl-1-[2-(trimethylsilyl)ethoxymethyl]-4,5,6,7-tetrahydro-1H-indazol-3-yl}-1-[2-(trimethylsilyl)ethoxymethyl]-1H-indol-6-yl)-N-methylamine

Participants

Reaction Steps

A solution of benzyl N-(2-{6,6-dimethyl-1-[2-(trimethylsilyl)ethoxymethyl]-4,5,6,7-tetrahydro-1H-indazol-3-yl}-1-[2-(trimethylsilyl)ethoxymethyl]-1H-indol-6-yl)-N-methylcarbamate (2.2 g, 3.1 mmol), 10% palladium-carbon (216 mg) and ammonium formate (989 mg, 16 mmol) in ethanol (30 ml) was heated under reflux for 2.5 hr. After cooling, the reaction mixture was filtered through celite, and the filtrate was concentrated. The residue was purified by silica gel chromatography to give the title compound (1.4 g, yield 79%).

Provenance & Evidence