Aniline → 2-[(4'-Methoxy[1,1'-biphenyl]-4-yl)sulfonyl]amino-4-hydroxy-5-(phenylamino)-pentanoic Acid

Participants

Reaction Conditions

Reaction Steps

3-[(4′-Methoxy[1,1′-biphenyl]-4-yl)sulfonyl]amino-2-oxo-5-[(phenylamino)methyl]-tetrahydrofuran: To a solution of methyl 2-[(4′-methoxy[1,1′-biphenyl]-4-yl)sulfonyl]amino-4,5-epoxypentanoate 1d (0.5 g, 1.28 mmol) in aniline (0.17 mL, 1.92 mmol) is added magnesium perchlorate (2 mg, 0.009 mmol) and the resulting mixture is heated for 4 h at 80° C. The resulting mixture is cooled to room temperature, and then the mixture is diluted with water, and extracted three times with EtOAc. The combined EtOAc layer is washed with water, brine, dried over MgSO4 and concentrated to an oil which is purified by column chromatography eluting with hexane/EtOAc (7:3) to give the desired product.

Provenance & Evidence