Ethyl Acetate → HCID 67308959, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 1-benzyloxycarbonyl-3-isocyanato-5-trifluoromethylindole-2-carboxylic acid tert-butyl ester 5E (˜4.10 mmol) in trifluoromethylbenzene (10 mL) was added 4-aminothiophene-3-carboxylic acid methyl ester 5F (1.30 g, 8.28 mmol). The reaction mixture was heated in a microwave reactor at 150° C. for 30 minutes. Ethyl acetate (100 mL) was added and the organic layer was washed with 1 N hydrochloric acid and brine. The organic layer was dried over sodium sulfate. The organic solvent was evaporated under reduced pressure. The crude product was purified by flash column chromatography to provide 1-benzyloxycarbonyl-3-[3-(4-methoxycarbonylthiophen-3-yl)-ureido]-5-trifluoromethyl-1H-indole-2-carboxylic acid tert-butyl ester 5G (1.89 g, 3.06 mmol).

Provenance & Evidence