Access to 2-Alkyl/Aryl-4-(1<i>H</i>)-Quinolones via Orthogonal “NH<sub>3</sub>” Insertion into <i>o</i>-Haloaryl Ynones: Total Synthesis of Bioactive Pseudanes, Graveoline, Graveolinine, and Waltherione F
作者:Shweta Singh、Sharanya Nerella、Srihari Pabbaraja、Goverdhan Mehta
DOI:10.1021/acs.orglett.0c00172
日期:2020.2.21
An efficient one-pot synthesis of 4-(1H)-quinolones through an orthogonal engagement of diverse o-haloaryl ynones with ammonia in the presence of Cu(I), involving tandem Michael addition and ArCsp2-N coupling, is presented. The substrate scope of this convenient protocol, wherein ammonium carbonate acts as both an in situ ammonia source and a base toward diverse 2-substituted 4-(1H)-quinolones, has
提出了一种有效的一锅法合成4-(1H)-喹诺酮的方法,该方法是在Cu(I)存在下,通过串联的迈克尔加成反应和ArCsp2-N偶联作用,使多种邻卤代芳基炔酮与氨进行正交结合。已绘制出此便捷方案的底物范围,其中碳酸铵既可作为原位氨源,又可作为多种2-取代的4-(1H)-喹诺酮类的碱,并且其功效已通过生物活性天然产物的简明全合成进行了验证假单胞菌(IV,VII,VIII和XII),砾石,gravolinine和waltherioneF。