di-tert-butyl (6-{[(4-bromo-1-trityl-1H-imidazol-2-yl)(5-ethyl-2-fluoro-3-methoxyphenyl)methyl]amino}isoquinolin-1-yl)imidodicarbonate 、 (4-(2-bromophenyl)-1-trityl-1H-imidazol-2-yl)(3-ethoxy-5-ethyl-2-fluorophenyl)methanol 、 4-bromo-2-(chloro(5-ethyl-2-fluoro-3-methoxyphenyl)methyl)-1-trityl-1H-imidazole 、
6-amino-1-(di-tert-butoxycarbonylamino)isoquinoline 以to afford after flash chromatography (0 to 60% EtOAc/hexanes gradient) 615 mg of intermediate 217.4 as a pale yellow solid的产率得到