4,4-diethyl-2'-thioxo-3,4-dihydro-1H,2'H-spiro[naphthalene-2,5'-pyrimidine]-4',6'(1'H,3'H)-dione                                                                                                                                                              在
                                                                                                                                                                                 potassium hydroxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
异丙醇                                                                                  为溶剂,
                                                                                                                                                                                        以77%的产率得到potassium 4,4-diethyl-4',6'-dioxo-1',3,4,6'-tetrahydro-1H,4'H-spiro[naphthalene-2,5'-pyrimidine]-2'-thiolate