4-hydroxy-6,7-dimethoxynaphthalene-1,2-dione   、                                                                                      
2-bromo-3-(4'-toluenesulfonyloxy)-6,7-dimethoxy-1,4-naphthoquinone                                                                                                                                                              在
                                                                                                                                                                                 
N,N-二异丙基乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙二醇二甲醚                                                                                  为溶剂,
                                                                                                                                                    反应 96.0h,
                                                                                                                以4%的产率得到2-hydroxy-3-(3'-(2''-hydroxy-6'',7''-dimethoxy-1'',4''-dioxodihydronaphthalene-3''-yl)-1',4'-dioxo-6',7'-dimethoxy-naphthalene-2'-yl)-6,7-dimethoxy-1,4-naphthoquinone