Toluene → ethyl 2-hydroxy-2-(1-methyl-3-phenyl-1H-indol-2-yl)acetate

Beteiligte Stoffe

Reaktionsschritte

A solution of butyllithium (1.6 M, 3.44 mL, 5.5 mmol) was added at −20° C. to a solution of 1-methyl-3-phenyl-1H-indole (1b) (1.08 g, 5.3 mmol) in anhydrous tetrahydrofuran (20 mL) under a nitrogen atmosphere. After 1 hour, a solution of ethyl glyoxylate in toluene (50%, 1.1 mL, 5.5 mmol) was added. The reaction mixture was slowly warmed to room temperature for 2 hours, quenched with water (5 mL) and concentrated in vacuo. The residue was partitioned between dichloromethane (40 mL) and water (15 mL). The organic layer was washed with water (2×15 mL), brine (15 mL), dried over sodium sulfate, filtered and evaporated to dryness. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 90/10) to afford the desired alcohol (1c) as a white solid (360 mg, 1.16 mmol, 22%).

Herkunft & Nachweise