反应详情

3-{2-[2-(2-Hydroxy-naphthalen-1-yl)-ethoxy]-benzenesulfonylamino}-N-methoxy-N-methyl-succinamic acid tert-butyl ester (176 mg, 0.32 mmol) was combined with dimethylamino ethanol (0.063 mL, 0.63 mmol), triphenyl phosphine (165 mg, 0.63 mmol), and diethylazodicarboxylate (0.10 mL, 0.63 mmol) in freshly distilled THF (1.6 mL). The reaction was stirred at room temperature for eighteen hours. TLC analysis (silica, 50% EtOAc/hexanes) indicated consumption of the starting naphthol. The reaction mixture was concentrated and purified by gradient elution flash chromatography (SiO2, 30% EtOAc/hexanes to 50% EtOAc/hexanes to 80% EtOAc/hexanes to 100% EtOAc to 10% MeOH/CH2Cl2) to give 3-(2-{2-[2-(2-dimethylamino-ethoxy)-naphthalen-1-yl]-ethoxy}-benzenesulfonylamino)-N-methoxy-N-methyl-succinamic acid tert-butyl ester (75 mg, 0.12 mmol) in 38% yield. MS (APCI) m/z 630.2 (M+1).

1. customconsumption of the starting naphthol
2. concentrationThe reaction mixture was concentrated
3. custompurified by gradient elution flash chromatography (SiO2, 30% EtOAc/hexanes to 50% EtOAc/hexanes to 80% EtOAc/hexanes to 100% EtOAc to 10% MeOH/CH2Cl2)