An efficient copper-mediated three-component reaction of 2,3-allenoates or 2-alkynoates, amines, and nitriles affording fully substituted pyrazoles with a very nice diversity has been developed. A tandem conjugate addition, 1,2-addition, and N–N bond formation mechanism has been proposed for this diverse synthesis of pyrazoles based on mechanistic studies.
开发了一种高效的
铜介导的三组分反应,利用2,3-烯酯或2-炔酸酯、胺和腈,生成全取代的
吡唑,具有丰富的多样性。基于机理研究,提出了一种串联的共轭加成、1,2-加成和N–N键形成的机制,以解释这种多样化的
吡唑合成。