Regioselective synthesis of 2-unsubstituted 1-aryl-4- and 1-aryl-5-acylimidazoles
作者:Vitaly S. Mityanov、Ludmila G. Kuz'mina、Valery P. Perevalov、Iosif I. Tkach
DOI:10.1016/j.tet.2014.04.012
日期:2014.6
An efficient and simple method for the synthesis of 2-unsubstituted 1-aryl-4- and 1-aryl-5-acylimidazoles has been developed. It consists in the condensation of α-diketone monooximes with aromatic amines and formaldehyde on the presence of boron trifluoride etherate, leading to the formation of stable boron trifluoride complexes of N-oxides. Further reduction of these complexes led to the corresponding
已经开发了一种有效且简单的合成2-未取代的1-芳基-4-和1-芳基-5-酰基咪唑的方法。它包括在三氟化硼醚化物的存在下,α-二酮一肟与芳香胺和甲醛的缩合,导致形成稳定的N-氧化物三氟化硼配合物。这些络合物的进一步还原产生相应的咪唑。该方法允许这些化合物的芳基部分中取代基的广泛变化。