9-acetoxy-8-(3'-(9'-acetoxy-3',3'-dimethyl-7',10'-dioxo-1',2',7',10'-tetrahydro-3'H-naphtho[2,1-b]pyran-8'-yl)-1',4'-dioxo-1',4'-dihydronaphthalen-2'-yl)-3,3-dimethyl-1,2-dihydro-3H-naphtho[2,1-b]pyran-7,10-dione 在
三氯化铝 作用下,
以
二氯甲烷 为溶剂,
反应 1.25h,
以75%的产率得到9-hydroxy-8-(3'-(9'-hydroxy-3',3'-dimethyl-7',10'-dioxo-1',2',7',10'-tetrahydro-3'H-naphtho[2,1-b]pyran-8'-yl)-1',4'-dioxo-1',4'-dihydronaphthalen-2'-yl)-3,3-dimethyl-1,2-dihydro-3H-naphtho[2,1-b]pyran-7,10-dione