Hydrochloric Acid → HCID 67315090, compound

Participants

Reaction Steps

A solution of 5-fluoro-1,3-dihydro-indol-2-one (177 mg, 1.17 mmol) in THF (2 mL) is treated with a solution of lithium bis(trimethylsilyl)amide (2.9 mL of a 1M solution in THF, 2.3 mmol) dropwise. The resulting solution is stirred at room temperature for 15 min. A solution 5-oxo-5,7-dihydro-furo[3,4-b]pyridine-2-carboxylic acid (105 mg, 0.59 mmol) in dimethylformamide (2 mL) is added dropwise to the reaction mixture. The resulting solution is stirred for 3 h and is then poured into a cold 10% aqueous HCl solution (30 mL). The reaction mixture is stirred at room temperature for 65 h. The solid which precipitated from solution is collected by filtration, washed with water and purified by chromatography (silica gel, MeOH/EtOAc). The product containing fractions are concentrated to give the title compound as a reddish solid (54 mg, 29%).

Provenance & Evidence