7-(tert-butyl-dimethyl-silanyloxy)-8-(3,4-dihydroxy-phenyl)-4-methoxy-bicyclo[3.3.1]non-3-ene-2,9-dione                                                                                                                                                              在
                                                                                                                                                                                 Celite   、                                                                                                  silver carbonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                以96%的产率得到(1S,5R,7S,8R)-(+)-7-(tert-butyl-dimethyl-silanyloxy)-8-(3,4-dioxo-cyclohexa-1,5-dienyl)-4-methoxy-bicyclo[3.3.1]non-3-ene-2,9-dione