Ru(II)-Catalyzed Controlled Cross-Dehydrogenative Coupling of Benzamides with Activated Olefins via Weakly Coordinating Primary Amides
作者:Akanksha Singh Baghel、Anjali Aghi、Amit Kumar
DOI:10.1021/acs.joc.1c01090
日期:2021.7.16
Ru(II)-catalyzed regioselective ortho-alkenylation of primary benzamides with activated olefins has been realized over the competitive cyclized products. This reaction overall proceeds via a cross-dehydrogenative coupling (CDC) reaction using a simple and weakly coordinating primary amide group in the presence of an inexpensive Ru(II) salt and allows the controlled introduction of olefin motifs at
已经在竞争性环化产物上实现了Ru(II) 催化的伯苯甲酰胺与活化烯烃的区域选择性邻烯基化。该反应总体上通过交叉脱氢偶联 (CDC) 反应在廉价的 Ru(II) 盐存在下使用简单且弱配位的伯酰胺基团进行,并允许在邻位控制引入烯烃基序。-苯甲酰胺的位置。该策略成功的关键取决于微调反应条件。开发的协议展示了出色的区域/非对映选择性和良好的官能团耐受性,具有广泛的底物范围,并且不需要外部助剂以及昂贵的金属催化剂。详细的机理研究表明,碱基辅助的内部亲电型取代 (BIES) 步骤参与了反应机理。