procedure for the generation of 4,5-dimagnesioimidazoles is described. N-Protected 2-substituted 4,5-diiodoimidazoles were treated with i-PrMgCl (2.4 equiv) in THF at 0-5 degrees C. The resulting vicinal dianions reacted with electrophiles to give 4,5-disubstituted imidazoles in 27-71% yields.
描述了一种产生4,5-
二甲氨基咪唑的实验方便的方法。N-保护的2-取代的
4,5-二碘咪唑在THF中0-5℃下用i-PrMgCl(2.4当量)处理。生成的邻位二价阴离子与亲电试剂反应,得到27-71%的4,5-二取代的
咪唑产量。