Benzoyl chloride → 1h-Indole-1-carboxylic acid,5-(benzoylamino)-2,3-dihydro-,1,1-dimethylethyl ester

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Reaction Steps

Benzoyl chloride (305 μL, 1.5 eq.) was added to a solution of 5-amino-2,3-dihydro-indole-1-carboxylic acid tert-butyl ester (407 mg, 1.74 mmol) and triethylamine (1.2 mL, 5.0 eq.) in dichloromethane (5 mL) at 0° C. and the resulting mixture was stirred for 15 min. The reaction was then quenched by addition of sat. NaHCO3 and the mixture was extracted with 3×EtOAc. The combined extracts were dried over Na2SO4, filtered, concentrated and the product was purified by chromatography (20 to 100% EtOAc-hexanes) to give 5-benzoylamino-2,3-dihydro-indole-1-carboxylic acid tert-butyl ester (588 mg, 100%).

Provenance & Evidence