6-benzyl-8a-hydroxy-3,3-bis(4-methoxyphenyl)-4a-(2-oxo-2-phenylethyl)hexahydro-[1,2]dioxino[4,3-c]pyridin-5(3H)-one 在
manganese (II) acetate tetrahydrate 、
溶剂黄146 作用下,
反应 0.25h,
以75%的产率得到1-benzyl-3-[2-(4-methoxyphenyl)-2-oxoethyl]-3-(2-oxo-2-phenylethyl)piperidine-2,4-dione