Anion binding by meta ureido-substituted thiacalix[4]arenes

Article abstract of DOI:10.1016/j.tet.2011.08.062

The regioselective nitration of 25,26,27,28-tetrapropoxythiacalix[4]arene (1,3-alternate) led to the formation of mono- and dinitro derivatives bearing NO₂ groups in the meta positions at the same side of the molecule. Their reduction and subse