7,10-Dihydroxy-4-methyl-3,3-dioxo-2,3,5,5a,11a,11b-hexahydro-1H-3λ6-anthra[2,1-b]thiophene-6,11-dione 在
cerium(IV) ammonium nitrate supported on silica 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
以41%的产率得到6,11-dihydroxy-4-methyl-3,3,7,10-tetraoxo-1,2,7,11-tetrahydrothieno<3,2-a>anthracene