title: Efficient functionalizations of heteroatom-bridged calix[2]arene[2]triazines on the larger rim.
abstract: Heteroatom-bridged dichlorinated calix[2]arene[2]triazines, which were synthesized from the fragment coupling reactions of cyanuric chloride and various aromatic dinucleophiles, are a unique type of platform for the construction of functional macrocyclic host molecules. Utilizing a very convenient and straightforward nucleophilic displacement reaction of dichlorinated tetraoxacalix[2]arene[2]triazine by various chelating group-containing amines, a number of functionalized tetraoxacalix[2]arene[2]triazines on the larger rim were efficiently synthesized in good yields. The resulting tetraoxacalix[2]arene[2]triazines armed with two 2,2'-bi(pyridinyl)amino or two bis(2-pyridinemethyl)amino groups selectively formed 1:1 complexes with Cu2+ ion through most probably a chelating interaction effect.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Laboratory of Chemical Biology, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100080, China.
authors.forename: Hai-Bo
authors.initials: HB
authors.lastname: Yang
authors.forename: De-Xian
authors.initials: DX
authors.lastname: Wang
authors.forename: Qi-Qiang
authors.initials: QQ
authors.lastname: Wang
authors.forename: Mei-Xiang
authors.initials: MX
authors.lastname: Wang
mesh_terms: D000588:Amines / Q000737:chemistry; D047250:Calixarenes / Q000737:chemistry*; D002412:Cations / Q000737:chemistry; D018360:Crystallography, X-Ray; D019216:Metals, Heavy / Q000737:chemistry; D015394:Molecular Structure; D015125:Oxyquinoline / Q000737:chemistry; D013053:Spectrophotometry; D017186:Titrimetry; D014227:Triazines / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D000588:Amines; D002412:Cations; D019216:Metals, Heavy; D014227:Triazines; D047250:Calixarenes; D015125:Oxyquinoline