2,4-二硝基苯肼 、
(5S,13S)-5,13-bis[4-(trifluoromethyl)phenyl]-3,6,9,12,15-pentaoxabicyclo[15.3.1]henicosa-1(20),17-diene-19,21-dione 在
硫酸 作用下,
以
乙醇 为溶剂,
以66%的产率得到(5S,13S)-21-hydroxy-19-(2',4'-dinitrophenylazo)-5,13-bis[p-(trifluoromethyl)phenyl]-3,6,9,12,15-pentaoxabicyclo[15.3.1]henicosa-1(21),17,19-triene