means of both post-macrocyclization modification protocol and the stepwise fragment coupling approach, functionalized oxacalix[2]arene[2]triazines bearing two other electron-deficient (hetero)aromatic rings on the lower rim were efficiently synthesized. The resulting oxacalix[2]arene[2]triazine macrocyclesadopt 1,3-alternate conformation, yielding therefore an expanded electron-deficient cavity or space
报道了基于阴离子-π相互作用原理的新型大环阴离子受体。通过后宏环化修饰方案和逐步片段偶联方法,有效地合成了在下边缘带有两个其他电子缺陷(杂)芳环的官能化的
草酸[aca] lix [2] arene [2] triazines。所得的恶草酰[2]
芳烃[2]三嗪大环采用1,3-交替构象,因此产生由两个
三嗪环和两个附加的芳族环组成的扩大的电子缺陷腔或空间。光谱滴定研究表明,
五氟苯基取代的氧杂lix [2]
芳烃[2]三嗪与
叠氮化物和
氟化物在溶液中的选择性相互作用,结合常数(K 1:1)为1.33×10 3。到3.52×10 3 M –1。