2-hydroxymethyl-4,6-dimethoxy-3-phenylbenzofuran 在
Montmorillonite K
10 clay 作用下,
以
二氯甲烷 为溶剂,
以74%的产率得到6,8,14,16,20,22-hexamethoxy-4,12,24-triphenyl-25,28,30-trioxaheptacyclo<17.5.2.2
3,9.2
11,17.0
5,29.0
13,27.0
23,26>triaconta-1(24),3,5(29),6,8,11,13(27),14,16,19,21,23(26)-dodecaene