反应详情

A mixture of 100 mg of methyl {[(4-nitrophenoxy)carbonyl]oxy}acetate and 5.0 mL of THF was added to a mixture of 180 mg of methyl 4-[2-(4-{[(2-{[3-({[2-(methylamino)ethyl](pentan-3-yl)amino}methyl)benzoyl]amino}-4,5,6,7-tetrahydro-1-benzothiophen-3-yl)carbonyl]amino}phenyl)ethyl]benzoate, 0.15 mL of N-ethyl-N-isopropylpropan-2-amine, and 5.0 mL of THF under ice cooling, followed by stirring for 3 hours at room temperature. The reaction mixture was concentrated under reduced pressure, and ethyl acetate and a saturated aqueous sodium hydrogen carbonate solution were added to the residue, followed by extraction with ethyl acetate. The organic layer was washed sequentially with a saturated aqueous sodium hydrogen carbonate solution, water, and saturated brine and dried over anhydrous sodium sulfate, and the solvent was removed under reduced pressure. The residue was purified by basic silica gel column chromatography (hexane:chloroform=4:6), thereby obtaining 204 mg of methyl 4-{2-[4-({[2-({3-[7-methyl-3,6-dioxo-10-(pentan-3-yl)-2,5-dioxa-7,10-diazaundecan-11-yl]benzoyl}amino)-4,5,6,7-tetrahydro-1-benzothiophen-3-yl]carbonyl}amino)phenyl]ethyl}benzoate.

1. concentrationThe reaction mixture was concentrated under reduced pressure, and ethyl acetate
2. additiona saturated aqueous sodium hydrogen carbonate solution were added to the residue
3. extractionfollowed by extraction with ethyl acetate
4. washThe organic layer was washed sequentially with a saturated aqueous sodium hydrogen carbonate solution, water, and saturated brine
5. dry with materialdried over anhydrous sodium sulfate
6. customthe solvent was removed under reduced pressure
7. customThe residue was purified by basic silica gel column chromatography (hexane:chloroform=4:6)