2-ethylhexyl 3,3-bis(hydroxymethyl)-1,5-dioxa-9-azaspiro[5,5]undecane-9-carboxylate 、 在
三氟甲磺酸三甲基硅酯 作用下,
以
乙醚 为溶剂,
以453 mg的产率得到bis(2-ethylhexyl) 7,11,16,20,25,29,36,39,42,45,48,51-dodecaoxa-3,33-diazanonaspiro[5.2.2.2.2.2.2.2.2.5.2.2.2.2.2.2.2.2]henpentacontane-3,33-dicarboxylate