1-cyano-6,6-dimethyl-3-isopropylthio-4,5,6,7-tetrahydrobenzo[c]thiophen-4-one   、                                                                                      
1-Cyano-6,6-dimethyl-3(2-methylprop-1-yl)-4,5,6,7-tetrahydrobenzo[c]thiophen-4-one                                                                                                                                                                                                                                                                                                          以85%的产率得到6,6-dimethyl-3-isopropylthio-4,5,6,7-tetrahydrobenzo[c]thiophen-4-one-1-thiocarboxamide