Synthesis and Aggregation Properties of Two- and Three-Armed Nitrogen-Rich Chelate Ligands: Novel Bis(N-acylamidines), Tris(N-acylamidines) and Bis(triazapentadienes) with Flexible or Rigid Spacers
作者:Juliana Isabel Clodt、Christof Wigbers、Ralph Reiermann、Roland Fröhlich、Ernst-Ulrich Würthwein
DOI:10.1002/ejoc.201100218
日期:2011.6
and three-armed ligands, like bis(N-acylamidines) 7 and 9, tris(N-acylamidines) 8 and bis(1,3,5-triazapenta-1,3-dienes) 10 with different spacers between the ligand moieties, have been easily prepared in moderate-to-good yields starting from diamines, triamines or dicarboxylic acid derivatives. Thus, the reaction of diamines and triamines with N-acylimidates 3 led to bis(N-acylamidines) 7 and tris(N-acylamidines)
双臂和三臂配体,如双(N-酰脒)7 和 9、三(N-酰脒)8 和双(1,3,5-三氮杂五-1,3-二烯)10,配体之间具有不同的间隔物从二胺、三胺或二羧酸衍生物开始,很容易以中等至良好的产率制备。因此,二胺和三胺与 N-酰基酰亚胺 3 的反应分别导致通过氨基连接的双(N-酰基脒)7 和三(N-酰基脒)8。从二羧酸二氯化物和脒开始获得通过羰基互连的配体9。通过碳原子连接的双(三氮杂戊二烯)10 由二酰胺合成,其转化为双(N-亚氨酰亚胺酸酯)17,然后与去质子化的胺反应。由于分子内和分子间的氢键作用,这些化合物在固态下表现出不同的聚集行为。所有化合物都经过全面表征,包括通过 X 射线衍射。