1249949-53-8Relevant academic research and scientific papers
One-pot formation of aromatic tetraurea macrocycles
Wu, Zehui,Hu, Ting,He, Lan,Gong, Bing
, p. 2504 - 2507 (2012/07/13)
Treating derivatives of m-phenylenediamine having different electron-richness and reactivities with triphosgene in the presence of triethylamine led to aromatic tetraurea macrocycles in high yields. Factors important for efficiently forming these macrocycles include the molar ratio (2:1) between the diamine and triphosgene, reaction temperature (-75 °C), and solvent (CH2Cl2). By controlling the order and rate for adding diamines, tetraurea macrocycles consisting of two different types of monomeric residues have also been obtained in high yields.
