manganese triacetate   、                                                                                      
1-methoxy-2-(6-methyl-4-oxo-5,6-dihydro-4H-pyran-2-yl)-anthraquinone                                                                                                                                                              在
                                                                                                                                                                                 
溶剂黄146                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
苯                                                                                  为溶剂,
                                                                                                                                                    反应 18.0h,
                                                                                                                以64%的产率得到acetic acid trans-6-(1-methoxy-9,10-dioxo-9,10-dihydro-anthracen-2-yl)-2-methyl-4-oxo-3,4-dihydro-2H-pyran-3-yl-ester