Benzofuran → HCID 18518550, compound

Participants

Reaction Steps

To benzo[b]furan (76.4 mg, 2.1 eq) in anhydrous THF (2 mL) at −40° C. (bath temperature) was added n-BuLi (0.423 mL, 1.53 M in hexanes, 2.1 eq). The resulting light yellow coloured solution was stirred for 30 minutes, after which 1-(2-diethylaminoethyl)-4-bromoisatin (100.0 mg, 3.08×10−4 mol) in anhydrous THF (2 mL) was added. Stirring was continued at −40° C. for 9 hours. Saturated aqueous NH4Cl (1.5 mL) was added and the mixture was allowed to warm to room temperature. The mixture was extracted with EtOAc and the combined extracts were dried (anhydrous Na2SO4). After filtration, the solvent was removed in vacuo. Purification was carried out by column chromatography (silica gel, eluting 1%-2% MeOH in CHCl3) to give the title compound as a yellow oil (29.0 mg, 21%).

Provenance & Evidence