7-hydroxymethyl-4,6-dimethoxy-3-phenylbenzofuran 在
Montmorillonite K
10 clay 作用下,
以
二氯甲烷 为溶剂,
以76%的产率得到6,8,14,16,22,24-hexamethoxy-4,12,20-triphenyl-26,28,30-trioxaheptacyclo<17.5.2.2
3,9.2
11,17.0
5,29.0
13,27.0
21,25>triaconta-1(24),3,5(29),6,8,11,13(27),14,16,19,21(25),22-dodecaene