N-苯基马来酰亚胺   、                                                                                      
2-mercapto-1-naphthaldehyde                                                                                                                                                              在
                                                                                                                                         Takemoto's catalyst                                                                                                                                                                          作用下,
                                                                                                                以
                                                                                         xylene                                                                                  为溶剂,
                                                                                                                                                    反应 7.0h,
                                                                                                                生成                                                 11-hydroxy-9-phenyl-10a,11-dihydro-7aH-7-thia-9-aza-cyclopenta[b]phenanthrene-8,10-dione   、                                                                                             
11-hydroxy-9-phenyl-10a,11-dihydro-7aH-7-thia-9-aza-cyclopenta[b]phenanthrene-8,10-dione   、                                                                                             11-hydroxy-9-phenyl-10a,11-dihydro-7aH-7-thia-9-aza-cyclopenta[b]phenanthrene-8,10-dione