methyl 2,3-dihydro-3-methylene-1-benzothiophene-6-carboxylate-1,1-dioxide   、                                                                                      methyl 2,3-dihydro-3-methylene-5-fluoro-1-benzothiophene-6-carboxylate-1,1-dioxide   、                                                                                      methyl 2,3-dihydro-3-methylene-5-trifluoromethyl-1-benzothiophene-6-carboxylate-1,1-dioxide                                                                                                                                                                                                                                                                                                          生成                                                 
N-diaminomethylene-2,3-dihydro-3-methylene-1-benzothiophene-6-carboxamide-1,1-dioxide