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
Polystyrene‐Supported Palladium (Pd@PS)‐Catalyzed Carbonylative Annulation of Aryl Iodides Using Oxalic Acid as a Sustainable CO Source for the Synthesis of 2‐Aryl Quinazolinones
作者:Shankar Ram、Shaifali、Arvind Singh Chauhan、Sheetal、Ajay Kumar Sharma、Pralay Das
DOI:10.1002/chem.201902776
日期:2019.11.18
quinazolinones from o-carbamoyl/cyano aniline and aryl iodides using oxalic acid as a CO source under polystyrene supported palladium (Pd@PS) nanoparticles (NPs) catalyzed conditions has been developed. In this study, oxalic acid has been employed as safe, economic, environmentally benign, sustainable and bench-stable, solid CO surrogate under Double-Layer-Vial (DLV) system for the synthesis of 2-aryl quinazolinones
C from CO! A straightforward procedure for the carbonylativesynthesis of quinazolinones from readily available 2-aminobenzamide and arylbromides has been developed. In the presence of a palladium catalyst, various quinazolinones were produced in moderate to excellent yields. Remarkably, no chromatography was needed for purification (see scheme).