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
A highly efficient heterogeneous palladium-catalyzed carbonylative annulation of 2-aminobenzamides with aryl iodides leading to quinazolinones
作者:Shengyong You、Bin Huang、Tao Yan、Mingzhong Cai
DOI:10.1016/j.jorganchem.2018.09.003
日期:2018.11
The first heterogeneous carbonylative annulation of 2-aminobenzamides with aryl iodides was achieved in N,N-dimethylformamide (DMF) at 120 °C under 10 bar of carbon monoxide by using an MCM-41-immobilized bidentatephosphine palladium(II) complex [MCM-41-2P-Pd(OAc)2] as catalyst and 1,8-diazabicycloundec-7-ene (DBU) as base, yielding a wide variety of quinazolinone derivatives in good to excellent
One-Pot Copper(I)-Catalyzed Ligand/Base-Free Tandem Cyclooxidative Synthesis of Quinazolinones
作者:Kapil Upadhyaya、Ravi Kumar Thakur、Sanjeev K. Shukla、Rama Pati Tripathi
DOI:10.1021/acs.joc.6b00599
日期:2016.6.17
A novel and efficient Cu(I)-catalyzed ligand- and base-free multipathway domino strategy has been developed for the synthesis of 2-substituted quinazolinones. The reaction utilizes 2-bromobenzamide and multiform substrates such as aldehydes, alcohols, and methyl arenes for a one-pot protocol, whereas TMSN3 is used as a nitrogen source. A wide range of substrate scope, functional group tolerance, and
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.