Ammonium chloride as a very inexpensive and readily available reagent efficiently catalyzes one-pot, three-component Groebke condensation reactions of aldehydes, isocyanides, and 2-aminopyridines or 2-aminopyrimidines in methanol to afford the corresponding imidazo[1,2- a ]pyridines in high yields at room temperature.
氯化铵是一种非常便宜且易于获得的试剂,可有效催化醛,异氰酸酯和2-氨基吡啶或2-氨基嘧啶在甲醇中的一锅三组分 Groebke 缩合反应,得到相应的咪唑并[1,2- a ]吡啶在室温下高产量。
Facile synthesis of imidazo[1,2-a]pyridines via a one-pot three-component reaction under solvent-free mechanochemical ball-milling conditions
作者:Ali Maleki、Shahrzad Javanshir、Maryam Naimabadi
DOI:10.1039/c3ra43221a
日期:——
In this work, 3-aminoimidazo[1,2-a]pyridine derivatives have been synthesized by a one-pot three-component condensation reaction of 2-aminopridines, aldehydes and isocyanides under solvent-free mechanochemical ball-milling conditions in good to excellent yields at room temperature. This efficient protocol has many noticeable advantages such as mild reaction conditions, high yields, high atom economy, short reaction times and simple separation.