A practical synthesis of substituted 2,6-diaminopyridines via microwave-assisted copper-catalyzed amination of halopyridines
作者:Matthias Mastalir、Egon E. Rosenberg、Karl Kirchner
DOI:10.1016/j.tet.2015.08.042
日期:2015.10
selective substitution of one or two halogens by aryl or alkylamines was achieved within 2–6 h with temperatures between 80 and 225 °C affording 2,6-diaminopyridines in good to excellent isolated yields. The reaction allows easy variation between educts and different N-substitutions. The target compounds are valuable precursors for the synthesis of bis-phosphorylated 2,6-diaminopyridines which are
Synthesis, Structure, and Fullerene-Complexing Property of Azacalix[6]aromatics
作者:Shi-Xin Fa、Li-Xia Wang、De-Xian Wang、Liang Zhao、Mei-Xiang Wang
DOI:10.1021/jo5003714
日期:2014.4.18
Synthesis, structure, and fullerene-binding property of azacalix[6]aromatics were systematically studied. By means of [3 + 3] and [2 + 2 + 2] fragment coupling protocols, a number of azacalix[6]aromatics containing different combinations of benzene, pyridine, and pyrimidine rings and various substituents on the bridging nitrogen atoms were synthesized conveniently in moderate to good yields. The resulting