title: Formation and conformational conversion of flattened partial cone oxygen bridged calix[2]arene[2]triazines.
abstract: A stepwise fragment coupling reaction starting with substituted dichlorotriazine and resorcinol derivatives gave rise to thermodynamically favored 1,3-alternate tetraoxacalix[2]arene[2]triazines and kinetically controlled flattened partial cone tetraoxacalix[2]arene[2]triazines. The flattened partial cone conformer, which was stable due to the steric effect, converted into the 1,3-alternate conformer via ether bond cleavage upon treatment with an inorganic base.
authors.affiliation: National Laboratory for Molecular Sciences, Laboratory of Chemical Biology, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China.
authors.forename: Qi-Qiang
authors.initials: QQ
authors.lastname: Wang
authors.forename: De-Xian
authors.initials: DX
authors.lastname: Wang
authors.forename: Qi-Yu
authors.initials: QY
authors.lastname: Zheng
authors.forename: Mei-Xiang
authors.initials: MX
authors.lastname: Wang
mesh_terms: D047250:Calixarenes / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D010100:Oxygen / Q000737:chemistry*; D014227:Triazines / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D014227:Triazines; D047250:Calixarenes; D010100:Oxygen