4',5''-daminodibenzo-18-crown-6 、
cis-1,2,3,6-tetrahydrophthalic anhydride 在
PPA 作用下,
反应 2.0h,
以82%的产率得到2,5,8,24,27,30-hexaoxa-20,34-diazaheptacyclo[29.13.0.09,23.011,21.013,18.033,43.036,41]tetratetraconta-1(31),9(23),10,15,21,32,38,43-octaene-12,19,35,42-tetrone