Dimethylformamide → Methyl 3-formyl-6-methoxy-1H-indole-2-carboxylate

Beteiligte Stoffe

Reaktionsschritte

General Procedure I. POCl3 (2.94 ml, 32.2 mmol) was added dropwise to anhydrous DMF (10 ml) at 0° C. under argon. After stirred for 30 min, this solution was added dropwise to a solution of methyl6-methoxy-1H-indole-2-carboxylate (Aldrich, 2.2 g, 10.7 mmol) in anhydrous DMF (20 ml) at 0° C. under argon. The reaction was stirred for 20 h at room temperature, quenched with ice, diluted with EtOAc, a precipitate formed and was filtered and washed with H2O (×3) to give the title compound as an off-white solid.

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