反应详情

N-(2,6-Dichlorobenzoyl)-4-(2,6-dimethoxyphenyl)-L-phenylalanine methyl ester (150 mg) was dissolved in MeCN (6 mL) under N2 and chlorosulfonyl isocyanate (45 μL) was added, and the mixture was stirred at room temperature for 2.5 h. The mixture was concentrated and 1N HCl (8 mL) was added. The mixture was stirred at room temperature overnight, extracted with AcOEt, dried (MgSO4), filtered and evaporated. The crude product was purified by preparative TLC (silica gel; eluent: AcOEt) to give N-(2,6-dichlorobenzoyl)-4-(2,6-dimethoxy-3-carbamoylphenyl)-L-phenylalanine methyl ester (156 mg).

1. concentrationThe mixture was concentrated
2. addition1N HCl (8 mL) was added
3. stirringThe mixture was stirred at room temperature overnight
4. extractionextracted with AcOEt
5. dry with materialdried (MgSO4)
6. filtrationfiltered
7. customevaporated
8. customThe crude product was purified by preparative TLC (silica gel; eluent: AcOEt)