HCID 66789405, compound → HCID 66789429, compound

Participants

Reaction Steps

4-Tert-butoxycarbonylamino-3-nitro-benzoic acid ethyl ester (3.5 g, 11.3 mmol) was dissolved in ethanol (300 mL) and 10% palladium on carbon was added (0.45 g, 0.42 mmol). The mixture was evacuated and filled with hydrogen, then stirred at room temperature for 1 hour. The catalyst was filtered, washing with ethanol, and the solvent was evaporated. The crude 3-amino-4-tert-butoxycarbonylamino-benzoic acid ethyl ester thus obtained [3.1 g, 95%, MS (ISP): m/e=279.3 (M−H)] was used as such in the following reaction.

Provenance & Evidence