反应详情

Following the procedure described for Example 234, step a, reaction of {[4-(6′-amino-2′-methyl-biphenyl-3-sulfonyl)-5-methylsulfanyl-thiophen-2-yl]-imino-methyl}-carbamic acid tert-butyl ester (65 mg, 0.126 mmol, as prepared in Example 25, step c), racemic 2-bromo-propionyl bromide (19 μL, 0.189 mmol), and Et3N (52 μL, 0.378 mmol) in DCM (2 mL) afforded 55 mg (67%) of the title compound as a glassy solid after chromatography (PTLC, 10% EtOAc in DCM, 2×1500μ SiO2 plate). ESI-MS (m/z): Calcd. for C27H30BrN3O5S3: 652.0 (M+H); found: 653.6, 651.7, 553.9, 552.0 (M−Boc).