2,2-bis(7'-bromo-5',5'-dimethyl-1',3',6'-heptatriynyl)-5,5-dimethyl-1,3-dioxane 、 2-ethynyl-2-[9-(2-ethynyl-5,5-dimethyl-1,3-dioxan-2-yl)-5,5-dimethyl-1,3,6,8-nonatetraynyl]-5,5-dimethyl-1,3-dioxane 在
正丁基锂 、
copper(l) chloride 作用下,
以
四氢呋喃 、
正己烷 、
吡啶 为溶剂,
反应 72.5h,
以21%的产率得到3,3,11,11,19,19,26,26,34,34,41,41-dodecamethyl-1,5,17,21,32,36-hexaoxatrispiro[5.9.5.9.5.9]pentatetraconta-7,9,12,14,22,24,27,29,37,39,42-undecayne