1H-Indole-2-carboxylic acid, 1-methyl- → 1-Methyl-1H-indole-3-carbonyl chloride

Participants

Reaction Steps

Oxalyl chloride (7.1 mL, 81.4 mmol) in 50 mL of methylene chloride was added under nitrogen dropwise to a solution of 1-methyl-1H-indole carboxylic acid (2.86 g, 16.3 mmol) in 100 mL of methylene chloride at room temperature. After the addition the reaction was stirred at room temperature until the reaction was determined by NMR analysis to be complete. The solvent and excess oxalyl chloride were removed under reduced pressure. The residue was taken up in benzene and then concentrated to dryness under reduced pressure to give 1-methyl-1H-indole-3-carbonyl chloride, which was used in the following reaction without purification.

Provenance & Evidence