methyl 4-(2-hydroxy-6-oxocyclohex-1-en-1-yl)benzoate   、                                                                                      
2-(pent-1-yn-1-yl)naphthalene                                                                                                                                                              在
                                                                                                                                                                                 [ruthenium(II)(η
6-1-methyl-4-isopropyl-benzene)(chloride)(μ-chloride)]
2   、                                                                                                  copper diacetate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
1,4-二氧六环                                                                                  为溶剂,
                                                                                                                                                    反应 4.0h,
                                                                                                                以72%的产率得到methyl 2'-(naphthalen-2-yl)-2,6-dioxo-3'-propylspiro[cyclohexane-1,1'-indene]-5'-carboxylate