Hydrochloric Acid → methyl 1-cyclopentyl-5-fluoro-6-methyl-1H-indole-3-carboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of methyl 6-bromo-1-cyclopentyl-5-fluoro-1H-indole-3-carboxylate (3.4 g, 10 mmol), dimethylzinc (1.2 M, 16.7 mL, 20 mmol) and PdCl2dppf (163 mg, 0.2 mmol) in dioxane (20 mL) was stirred at 88° C. for 2 hr under nitrogen atmosphere. The mixture was then cooled and methanol was added in slowly followed by 2 N HCl. The mixture was treated with ethyl acetate, washed with water and brine, dried and evaporated. The residue was purified by flash chromatography with dichloromethane and hexane (1:1) to give methyl 1-cyclopentyl-5-fluoro-6-methyl-1H-indole-3-carboxylate (2.66 g, yield 97%).

Provenance & Evidence