Acetic Acid → HCID 69048206, compound

Participants

Reaction Steps

A mixture of 14.4 g of N-(5-(3-aminophenoxy)-2-nitrophenyl)-N-methylcarbamic acid t-butyl ester, 2.90 g of acetone, 3.00 g of acetic acid, 10.6 g of sodium triacetoxyborohydride and 200 ml of anhydrous tetrahydrofuran was stirred at room temperature for 4 days. The reaction mixture was concentrated, followed by addition of water and extraction with ethyl acetate. After the extraction solution was dried over anhydrous sodium sulfate, the solvent was distilled off, and the resulting residue was purified by silica gel column chromatography (eluting solvent: ethyl acetate/n-hexane=2/3) to give N-(5-(3-isopropylamino-phenoxy)-2-nitrophenyl)-N-methylcarbamic acid t-butyl ester, as an intermediate. This intermediate was dissolved in 200 ml of methanol, followed by addition of 2.02 g of 10% palladium-carbon, and the mixture was vigorously stirred under a hydrogen atmosphere at room temperature for 2.5 hours. After completion of the reaction, the catalyst was filtered, and the solvent was distilled off to give the title compound (12.0 g, 81% yield).

Provenance & Evidence