반응 #41904

반응 방정식

sodium carbonate

3,4-dichlorobenzyl bromide

potassium carbonate

(S)-3-(4′-Fluoro-biphenyl-4-yl)-2-{[(3S,7S)-3-(4-hydroxy-phenyl)-1-methyl-2-oxo-6-((S)-1-phenyl-propyl)-2,3,5,6,7,8-hexahydro-1H-4-oxa-1,6-diaza-anthracene-7-carbonyl]-amino}-propionic acid methyl ester

→

(S)-2-{[(3S,7S)-3-[4-(3,4-dichloro-benzyloxy)-phenyl]-1-methyl-2-oxo-6-((S)-1-phenyl-propyl)-2,3,5,6,7,8-hexahydro-1H-4-oxa-1,6-diaza-anthracene-7-carbonyl]-amino}-3-(4′-fluoro-biphenyl-4-yl)-propionic acid methyl ester

수율 30.4%

용매

DMF

반응 조건

후처리

1. 1
   세척The organic layer was washed with brine
2. 2
   건조dried over sodium sulfate
3. 3
   농축concentrated
4. 4
   기타The residue was purified over silica (hexanes-ethyl acetate-MeOH, 7-3-0.1)

실험 절차

(S)-3-(4′-Fluoro-biphenyl-4-yl)-2-{[(3S,7S)-3-(4-hydroxy-phenyl)-1-methyl-2-oxo-6-((S)-1-phenyl-propyl)-2,3,5,6,7,8-hexahydro-1H-4-oxa-1,6-diaza-anthracene-7-carbonyl]-amino}-propionic acid methyl ester (27 mg, 0.078 mmol) was dissolved in 2 mL of DMF and 3,4-dichlorobenzyl bromide (0.39 mmol) and potassium carbonate (0.39 mmol) were added. The mixture was stirred at room temperature for 8 hours and was poured onto ethyl acetate and 10% sodium carbonate. The organic layer was washed with brine, dried over sodium sulfate and concentrated. The residue was purified over silica (hexanes-ethyl acetate-MeOH, 7-3-0.1) to provide (S)-2-{[(3S,7S)-3-[4-(3,4-dichloro-benzyloxy)-phenyl]-1-methyl-2-oxo-6-((S)-1-phenyl-propyl)-2,3,5,6,7,8-hexahydro-1H-4-oxa-1,6-diaza-anthracene-7-carbonyl]-amino}-3-(4′-fluoro-biphenyl-4-yl)-propionic acid methyl ester (21 mg, LC/MS: m/z 889).

출처