四溴化碳 、
heptacyclo[16.12.0.02,11.05,10.012,17.021,30.022,27]triaconta-1(18),2(11),3,5,7,9,12,14,16,19,21(30),22,24,26,28-pentadecaene-28-carbaldehyde 在
三苯基膦 、
锌 作用下,
以
二氯甲烷 为溶剂,
以55%的产率得到28-(2,2-dibromoethenyl)heptacyclo[16.12.0.02,11.05,10.012,17.021,30.022,27]triaconta-1(18),2(11),3,5,7,9,12,14,16,19,21(30),22,24,26,28-pentadecaene