(3R,10bS)-8,9-dimethoxy-5-oxo-3-phenyl-2,3,6,10b-tetrahydro-5H-oxazolo[2,3-a]isoquinoline 、 (1,3-dioxan-2-yl)ethylmagnesium bromide 以
四氢呋喃 为溶剂,
反应 2.5h,
以45%的产率得到(1S)-1-[2-(1,3-dioxan-2-yl)ethyl]-2-[(1R)-2-hydroxy-1-phenylethyl]-6,7-dimethoxy-3-oxo-1,2,3,4-tetrahydroisoquinoline