Pd-catalyzed Fukuyama cross-coupling of secondary organozinc reagents for the direct synthesis of unsymmetrical ketones
作者:Alan H. Cherney、Sarah E. Reisman
DOI:10.1016/j.tet.2013.11.104
日期:2014.5
organometallic reagents represents a convergent route toward complex and versatile ketone products. Despite the mild conditions and high functional group tolerance, the cross-coupling of carboxylic acid derivatives, such as thioesters, and secondary organometallic reagents is an underdeveloped transformation. Herein, we disclose a convenient and efficient protocol for the Pd-catalyzed Fukuyama cross-coupling
酰基亲电试剂与有机金属试剂的偶联代表了向复杂而多功能的酮产品迈进的聚合之路。尽管条件温和且官能团耐受性高,但是羧酸衍生物(如硫代酯)与有机金属第二试剂的交叉偶联仍处于开发阶段。在这里,我们公开了一种方便有效的方案,用于钯催化的二级有机锌试剂与硫酯亲电子试剂的福山交叉偶联。在这些温和条件下,可以将具有敏感官能团的一系列硫酯与活化或未活化的仲有机卤化锌偶联,并获得高收率。将该方法扩展到包括酰氯底物,以高收率产生芳基烷基酮。此外,