6-(tert-butyl)-4a-(3,3-dimethyl-2-oxobutyl)-8a-hydroxy-3,3-bis(4-methoxyphenyl)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 2.0h,
以63%的产率得到1-tert-butyl-3-(3,3-dimethyl-2-oxobutyl)-3-[2-(4-methoxyphenyl)-2-oxoethyl]piperidine-2,4-dione