diethyl (E)-((4,4',5,5'-tetrahydro-[6,6'-bi(cyclopenta[b]thiophenylidene)]-2-yl)methyl)phosphonate   、                                                                                      
(E)-2-formyl-6,6'-bis(4,5-dihydro-6H-cyclopenta[b]thienylidene)                                                                                                                                                              在
                                                                                                                                                                                 
potassium tert-butylate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 5.0h,
                                                                                                                以69%的产率得到(6E)-6-(4,5-dihydrocyclopenta[b]thiophen-6-ylidene)-2-[(E)-2-[(6E)-6-(4,5-dihydrocyclopenta[b]thiophen-6-ylidene)-4,5-dihydrocyclopenta[b]thiophen-2-yl]ethenyl]-4,5-dihydrocyclopenta[b]thiophene