1,3-二氧杂环戊烯并[4,5-g]异喹啉-5-醇,5,6,7,8-四氢-4-甲氧基-6-甲基-   、                                                                                      
1,3-二甲基-2-硫代巴比妥酸                                                                                                                                                                                              以
                                                                                         
N,N-二甲基乙酰胺                                                                                  为溶剂,
                                                                                                                                                    反应 0.41h,
                                                                                                                以9%的产率得到1,3-dimethyl-2-thioxo-4,6-dioxoperhydropyrimidine-5-spiro-6'-{4'-methoxy-7'-(1,3-dimethyl-2-thioxo-4,6-dioxoperhydropyrimidin-5-yl)-5',6',7',8'-tetrahydro[1,3]dioxolo[4,5-g]naphthalene}