Transition-Metal-Free Formal Decarboxylative Coupling of α-Oxocarboxylates with α-Bromoketones under Neutral Conditions: A Simple Access to 1,3-Diketones
作者:Zhen He、Xiaotian Qi、Shiqing Li、Yinsong Zhao、Ge Gao、Yu Lan、Yiwei Wu、Jingbo Lan、Jingsong You
DOI:10.1002/anie.201409361
日期:2015.1.12
A transition‐metal‐free formal decarboxylative coupling reaction between α‐oxocarboxylates and α‐bromoketones to synthesize 1,3‐diketone derivatives is presented. In this reaction, a broad scope of substrates can be employed, and neither a metal‐based reagent nor an additional base is required. DFT calculations reveal that this reaction proceeds through a coupling followed by decarboxylation mechanism
提出了α-氧代羧酸盐和α-溴代酮之间无过渡金属的正式脱羧偶联反应,以合成1,3-二酮衍生物。在该反应中,可以使用广泛的底物,并且不需要金属基试剂或额外的碱。DFT计算表明,该反应通过偶联反应继之以脱羧机理进行,α-溴酮在中性条件下前所未有地充当亲核试剂。决定速率的步骤是通过热分解形成的异常氢键结合的烯醇化物。