反应详情

An aqueous 1N lithium hydroxide solution (0.33 mL) was added to a solution of 4-[[(2,6-dichlorophenyl)carbonyl]amino]-N-[[2-chloro-4-[5-[[(3-hydroxyphenyl)methyl]amino]-1H-tetrazol-1-yl]phenyl]carbonyl]-L-phenylalanine methyl ester (75 mg; 0.108 mmol) in methanol (0.66 mL) and THF (0.66 mL) and the mixture was stirred at room temperature for 90 min. After the solvents were stripped under reduced pressure, the residue was dissolved in water (20 mL) and extracted with diethyl ether (3×5 mL). The aqueous layer was filtered through Celite, then acidified with 1 N HCl (0.35 mL). The resulting colorless solid was filtered off, washed with water, and dried in vacuo to give 57 mg of 4-[[(2,6-dichlorophenyl)carbonyl]amino]-N-[[2-chloro-4-[5-[[(3-hydroxyphenyl)methyl]amino]-1H-tetrazol-1-yl]phenyl]carbonyl]-L-phenylalanine. FAB HRMS: (C31H24Cl3N7O5) Obs. Mass 680.0981 Calcd. Mass 680.0983 (M+H).

1. extractionextracted with diethyl ether (3×5 mL)
2. filtrationThe aqueous layer was filtered through Celite
3. filtrationThe resulting colorless solid was filtered off
4. washwashed with water
5. customdried in vacuo