劳森试剂   、                                                                                      
5'-amino-2'-(4-methoxyphenyl)-4a'H-spiro[cyclopentane-1,4'-thieno[2,3-d][1,3,2]thiazaphosphinine]-6'-carboxylic acid 2'-sulfide                                                                                                                                                                                              以
                                                                                         
苯                                                                                  为溶剂,
                                                                                                                                                    反应 10.0h,
                                                                                                                以58%的产率得到4,11-bis(4-methoxyphenyl)-4,11-bis(sulfanylidene)spiro[5-oxa-8,12-dithia-3,10-diaza-4λ5,11λ5-diphosphatricyclo[7.4.0.02,7]trideca-2(7),9-diene-13,1'-cyclopentane]-6-one