Efficient Synthesis of Quinazolinones by Transition‐Metal‐Free Direct Aerobic Oxidative Cascade Annulation of Alcohols with<i>o</i>‐Aminoarylnitriles
作者:Qi Wang、Miao Lv、Jianping Liu、Yang Li、Qing Xu、Xu Zhang、Hongen Cao
DOI:10.1002/cssc.201900265
日期:2019.7.5
A mild and atom‐economic method was developed for direct and efficient synthesis of quinazolinones through a transition‐metal‐free aerobic oxidative cascade annulation reaction of widely available o‐aminoarylnitriles and alcohols. Air could be employed as an effective oxidant under mild conditions, generating water as the only byproduct. Possibly owing to the “cesium effect”, the water‐soluble base
Ruthenium-catalyzed regioselective oxidative cross-coupling/annulations of quinazolones with alkynes were successfully developed for direct access to fused polycyclic heteroarenes. The transformation proceeded well with a broad substrate scope under mild conditions to achieve moderate to high yields.
<i>ortho</i>-Naphthoquinone-catalyzed aerobic oxidation of amines to fused pyrimidin-4(3<i>H</i>)-ones: a convergent synthetic route to bouchardatine and sildenafil
作者:Kyeongha Kim、Hun Young Kim、Kyungsoo Oh
DOI:10.1039/d0ra06820a
日期:——
A facile access to fusedpyrimidin-4(3H)-one derivatives has been established by using the metal-free ortho-naphthoquinone-catalyzed aerobic cross-coupling reactions of amines. The utilization of two readily available amines allowed a direct coupling strategy to quinazolinone natural product, bouchardatine, as well as sildenafil (Viagra™) in a highly convergent manner.
通过使用无金属邻萘醌催化的胺有氧交叉偶联反应,已经建立了一种容易获得稠合 pyrimidin-4(3 H )-one 衍生物的方法。利用两种容易获得的胺,可以以高度收敛的方式直接偶联喹唑啉酮天然产物布沙达汀和西地那非 (Viagra™)。
Copper-Catalyzed Domino Synthesis of Quinazolinones via Ullmann-Type Coupling and Aerobic Oxidative C−H Amidation
作者:Wei Xu、Yibao Jin、Hongxia Liu、Yuyang Jiang、and Hua Fu
DOI:10.1021/ol1030266
日期:2011.3.18
starting materials as well as economical and environmentally friendly air as the oxidant. This can be the first example of constructing N-heterocycles via sequential Ullmann-type coupling under air and aerobicoxidative C−H amidation.