(2Z,8Z,15S,17S)-15,17-dimethyl-14,18-dioxatetracyclo[17.2.2.24,7.210,13]heptacosa-1(22),2,4,6,8,10,12,19(23),20,24,26-undecaene 在
碘 、
methyloxirane 作用下,
以
甲苯 为溶剂,
反应 0.25h,
以63%的产率得到(24S,26S)-24,26-dimethyl-23,27-dioxahexacyclo[14.6.5.04,21.07,20.010,19.013,18]heptacosa-1(22),2,4(21),5,7(20),8,10(19),11,13(18),14,16-undecaene