Synthesis of quinazolin-4(3H)-ones via electrochemical decarboxylative cyclization of α‑keto acids with 2-aminobenzamides
作者:Qing Tian、Jinli Zhang、Liang Xu、Yu Wei
DOI:10.1016/j.mcat.2020.111345
日期:2021.1
Abstract Herein, an environmentally benign electrochemical protocol has been disclosed for the synthesis of quinazolin-4(3H)-one derivatives from readily available α‑keto acids and 2-aminobenzamides. This decarboxylative cyclization process proceeds conveniently in the absence of any homogeneous metal catalysts, bases, or external oxidants. This protocol also features CO2 by-products, mild reaction
摘要 本文公开了一种环境友好的电化学方案,用于从容易获得的 α-酮酸和 2-氨基苯甲酰胺合成 quinazolin-4(3H)-one 衍生物。这种脱羧环化过程在没有任何均相金属催化剂、碱或外部氧化剂的情况下方便地进行。该协议还具有 CO2 副产物、温和的反应条件(室温和空气气氛)和广泛的底物范围,包括一系列 2,3-二取代喹唑啉酮产品。
Palladium-Catalyzed One-Pot Synthesis of Quinazolinones via <i>tert</i>-Butyl Isocyanide Insertion
作者:Xiao Jiang、Ting Tang、Jin-Mei Wang、Zhong Chen、Yong-Ming Zhu、Shun-Jun Ji
DOI:10.1021/jo500636y
日期:2014.6.6
A novel palladium-catalyzedthree-componentreaction for the synthesis of quinazolin-4(3H)-ones from readily available 2-aminobenzamides and aryl halides via a palladium-catalyzedisocyanideinsertion/cyclization sequence has been developed. This methodology efficiently constructs quinazolin-4(3H)-ones in moderate to excellent yields with the advantages of operational simplicity.
Ligand-Free Copper-Manganese Spinel Oxide-Catalyzed Tandem One-Pot C-H Amidation and<i>N</i>-Arylation of Benzylamines: A Facile Access to 2-Arylquinazolin-4(3<i>H</i>)-ones
作者:Rohit Sharma、Ram A. Vishwakarma、Sandip B. Bharate
DOI:10.1002/adsc.201600549
日期:2016.10.6
An efficient ligand‐free copper‐manganese (Cu‐Mn) spinel oxide‐catalyzed direct tandem C−H oxygenation and N‐arylation of benzylamines has been developed. The method has been utilized for the synthesis of medicinally important 2‐arylquinazolin‐4(3H)‐ones. Salient features of this method include recyclable catalyst, no ligand, excellent product yields, shorter reaction times and a broad substrate scope