Formation and conformational conversion of flattened partial cone oxygen bridged calix[2]arene[2]triazines.
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.
Wang
Qi-Qiang
QQ
National Laboratory for Molecular Sciences, Laboratory of Chemical Biology, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China.
Wang
De-Xian
DX
Zheng
Qi-Yu
QY
Wang
Mei-Xiang
MX
D047250:Calixarenes / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D010100:Oxygen / Q000737:chemistry*; D014227:Triazines / Q000737:chemistry*; D014961:X-Ray Diffraction
D014227:Triazines; D047250:Calixarenes; D010100:Oxygen