1,8-Diazabicyclo(5.4.0)undec-7-ene → N6-[[(4-Azidophenyl)methoxy]carbonyl]-L-lysine

Participants

Reaction Steps

DBU (0.064 mL, 0.425 mmol) was added to a solution of (S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-6-((((4-azidobenzyl)oxy)carbonyl)amino)hexanoic acid (Compound SP661) (210 mg, 0.386 mmol) in DMF (0.7 mL) at room temperature under a nitrogen atmosphere. The resulting reaction mixture was stirred at the same temperature for 20 minutes and then purified by reverse-phase silica gel column chromatography (0.05% aqueous trifluoroacetic acid solution/0.05% trifluoroacetic acid-acetonitrile solution) to afford (S)-2-amino-6-((((4-azidobenzyl)oxy)carbonyl)amino)hexanoic acid (Lys(Acbz)) (Compound tk34) (100 mg, 81%).

Provenance & Evidence