11,12-dibromo-11,12-dihydroindeno[2,1-a]fluorene 在
potassium tert-butylate 作用下,
以
四氢呋喃 为溶剂,
反应 0.67h,
以34%的产率得到Undecacyclo[18.16.2.29,12.02,10.03,8.011,19.013,18.021,26.027,38.030,37.031,36]tetraconta-1,3,5,7,9,11,13,15,17,19,21,23,25,27(38),28,30(37),31,33,35,39-icosaene