9-hydroxy-8-(3'-(9'-hydroxy-3',3'-dimethyl-1',4'-dioxo-1',4'-dihydro-3'H-naphtho[2,1-b]pyran-8'-yl)-1',4'-dioxo-1',4'-dihydronaphthalen-2'-yl)-3,3-dimethyl-3H-naphtho[2,1-b]pyran-7,10-dione 、
二甲氨基甲酰氯 在
吡啶 作用下,
反应 1.25h,
以58%的产率得到9-(N,N-dimethylcarbamoyloxy)-8-(3'-(9'-[N,N-dimethylcarbamoyloxy]-3',3'-dimethyl-7',10'-dioxo-7',10'-dihydro-3'H-naphtho[2,1-b]pyran-8'-yl)-1',4'-dioxo-1',4'-dihydronaphthalen-2'-yl)-3,3-dimethyl-3H-naphtho[2,1-b]pyran-7,10-dione