9-hydroxy-3,3-dimethyl-3H-naphtho[2,1-b]pyran-7,10-dione   、                                                                                      
2,3-dichloro-6-n-propyloxy-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 8.0h,
                                                                                                                以18%的产率得到9-hydroxy-8-(3'-(9'-hydroxy-3',3'-dimethyl-7',10'-dioxo-7',10'-dihydro-3'H-naphtho[2,1-b]pyran-8'-yl)-1',4'-dioxo-6'-n-propoxy-1',4'-dihydronaphthalen-2'-yl)-3,3-dimethyl-3H-naphtho[2,1-b]pyran-7,10-dione