“On-Water” Synthesis of Quinazolinones and Dihydroquinazolinones Starting from o-Bromobenzonitrile
作者:Zibin Liu、Li-Yan Zeng、Chao Li、Fubiao Yang、Fensheng Qiu、Shuwen Liu、Baomin Xi
DOI:10.3390/molecules23092325
日期:——
A versatile and practical “on-water” protocol was newly developed to synthesize quinazolinones using o-bromobenzonitrile as a novel starting material. Studies have found that air as well as water plays an important role in synthesis of quinazolinones. Further investigation indicated that dihydroquinazolinones can be prepared with this protocol under the protection of N2. The protocol can be extended
Abstract Microwave-assisted copper-catalyzed cascade reactions between 2-halobenzoic acids and amidines to synthesize quinazolinone derivatives in water are reported. A variety of target products were obtained in good to excellent yields up to 94%. Its application was performed by the synthesis of 4-(1H-benzo[d]imidazol-2-ylthio)-6-methoxypteridine, which displayed significant anti-proliferation effect
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
A simple and efficient Brønsted acidcatalyzed synthesis of 2-aryl-quinazolinones via cyclization of 2-aminobenzamides with benzonitrile in PEG under metal and ligand-free condition. All substituted benzonitriles were also well participated with the formation of the corresponding products in moderate to good yields.
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