1,9-bis[(α,α-diethyl-α-hydroxy)methyl]-5,5-diethyldifurylmethane 、
5,5,10,10,15,15-hexaethyl-21,22-dioxatetrapyrromethane 在
三氟化硼乙醚 作用下,
以
乙腈 为溶剂,
反应 0.5h,
以53%的产率得到2,2,7,7,12,12,17,17,22,22,27,27-Dodecaethyl-31,32,34,35-tetraoxa-33,36-diazaheptacyclo[26.2.1.13,6.18,11.113,16.118,21.123,26]hexatriaconta-1(30),3,5,8,10,13,15,18,20,23,25,28-dodecaene