Sodium Hydroxide → HCID 44461524, compound

Participants

Reaction Conditions

Reaction Steps

To a suspension of 4-[[(2,6-dichlorophenyl)carbonyl]amino]-N-[[1-(4-methoxyphenyl-methyl)cyclohexy]carbonyl]-L-phenylalanine methyl ester (0.15 g, 0.25 mmol) in ethanol (2 mL) was added aqueous 1.0 N sodium hydroxide (1.5 mL, 3 mmol) at room temperature. The mixture was heated to 50° C. and the resulting clear solution was stirred overnight. The mixture was concentrated, the residue was diluted with 5 mL of water and extracted with 25 mL of ether to remove any neutral impurities. The aqueous layer was acidified with 1 N HCl and the precipitated white solid was collected by filtration and washed with water (20 mL) and hexane (20 mL). After air-drying, 4-[[(2,6-dichlorophenyl)carbonyl]amino]-N-[[1-(4-methoxyphenylmethyl)cyclohexyl]carbonyl]-L-phenylalanine (0.12 g, 82%) was obtained as a white solid, mp 136-140° C. HR MS: Obs mass, 583.1763. Calcd mass, 583.1766 (M+H).

Provenance & Evidence