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