benzyl (1R,3S,6R,11aS)-10-bromo-1-ethylsulfanyl-7-methoxy-4-oxo-6-(phenylmethoxymethyl)-3-[3-tri(propan-2-yl)silyloxyprop-2-enyl]-3,6,11,11a-tetrahydro-1H-pyrazino[1,2-b]isoquinoline-2-carboxylate 在
silver tetrafluoroborate 作用下,
以
四氢呋喃 为溶剂,
反应 6.0h,
以88%的产率得到benzyl (1R,2S,10R,13S,15R)-5-bromo-15-formyl-8-methoxy-12-oxo-10-(phenylmethoxymethyl)-11,16-diazatetracyclo[11.2.1.02,11.04,9]hexadeca-4,6,8-triene-16-carboxylate