Sodium Hydroxide → HCID 9915127, compound

Participants

Reaction Steps

A mixture of N-[2,6-dichloro-4-[[[(3-hydroxyphenyl)methyl]amino]carbonyl]benzoyl]-3-[(thiophene-2-carbonyl)amino]-L-alanine, methyl ester (2.41 g, 4.4 mmol) in methanol (100 Ml) and sodium hydroxide (0.35 g, 8.8 mmol) in water (2 Ml) was stirred at room temperature overnight and then the solvents were evaporated. The residue was partitioned between water and ethyl acetate and the ethyl acetate layer was discarded. The aqueous layer was acidified with 1 M HCl, and extracted twice with ethyl acetate. The combined organic extracts were washed with brine, and the product started to precipitate. The solvents were evaporated from the organic layer, and dichloromethane/hexanes was added to the residue. The solid was filtered off, dried overnight under high vacuum, and taken up again in dichloromethane/hexanes. The solid was filtered off, and then dried overnight under high vacuum to give N-[2,6-dichloro-4-[[[(3-hydroxyphenyl)methyl]amino]carbonyl]benzoyl]-3-[(thiophene-2-carbonyl)amino]-L-alanine (2.10 g, 89%) as a white solid.

Provenance & Evidence