1,3-Bis(5-amino-2,7-ditert-butyl-9,9-dimethylxanthen-4-yl)urea 、
1,3-Bis[2-(2-isocyanatophenoxy)phenyl]urea 以
二氯甲烷 为溶剂,
反应 18.5h,
以41%的产率得到3,11,19,59-Tetratert-butyl-65,65,66,66-tetramethyl-15,31,47,63-tetraoxa-6,8,22,24,38,40,54,56-octazaundecacyclo[59.3.1.113,17.05,64.09,14.016,21.025,30.032,37.041,46.048,53.057,62]hexahexaconta-1(64),2,4,6,9,11,13,16,18,20,23,25,27,29,32,34,36,39,41,43,45,48,50,52,54,57,59,61-octacosaene-7,23,39,55-tetrol