4,4-(3-oxapentamethylene)-6-phenylspiro{(1,3-dioxa-4-azonia-2-boratacyclohexane)-2,9'-(9'-borataxanthene)} 以
xylene 为溶剂,
以60%的产率得到3,3-(3-oxapentamethylene)-5-phenylspiro{(1-oxa-3-azonia-2-boratacyclopentane)-2,2'-(dibenzo{c,f}-1',4',2'-dioxaboratepine)}