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4′位取代苯并冠醚已有很多报道,3′位取代苯并冠醚却很少见。见诸文献的3′位取代基仅有甲基、芳甲酰基、甲氧基、正十五烷基、氰基和叔丁基等。鉴于苯环
Substitution of benzotriazole at the 4 ’position has been reported in many cases. However, the substitution of benzo crown ethers at 3’ position is rare. The only 3 ’substituents found in the literature are methyl, aroyl, methoxy, n-pentadecyl, cyano and t-butyl and the like. Given the benzene ring