(1S,3S,4S)-Ethyl-3,4-dihydro-4-hydroxy-5,6,10-trimethoxy-1-methyl-1H-naphtho<2,3-c>pyran-3-acetat 在
ammonium cerium(IV) nitrate 作用下,
以
乙腈 为溶剂,
反应 0.25h,
以94%的产率得到(1S,3R,4S)-Ethyl-3,4,5,10-tetrahydro-4-hydroxy-6-methoxy-1-methyl-5,10-dioxo-1H-naphtho<2,3-c>pyran-3-acetat