Triethylamine → HCID 86654949, compound

Participants

Reaction Steps

To a solution of 3-amino-1-thiophen-3-yl-methyl-5-trifluoromethyl-1H-indole-2-carboxylic acid tert-butyl ester 1E (1.74 g, 4.39 mmol) in anhydrous toluene (50 mL) was added triphosgene (0.44 g, 1.48 mmol) and triethylamine (0.89 g, 8.81 mmol). The reaction mixture was heated at reflux for 3 hours. Toluene (50 mL) was added and the organic layer was washed with water and brine. The organic layer was dried over sodium sulfate. The organic solvent was evaporated under reduced pressure to provide 3-isocyanato-1-thiophen-3-yl-methyl-5-trifluoromethyl-1H-indole-2-carboxylic acid tert-butyl ester 1F which was used in the next step without further purification.

Provenance & Evidence