Accessing Polysubstituted Quinazolines via Nickel Catalyzed Acceptorless Dehydrogenative Coupling
作者:Seuli Parua、Rina Sikari、Suman Sinha、Gargi Chakraborty、Rakesh Mondal、Nanda D. Paul
DOI:10.1021/acs.joc.8b01479
日期:2018.9.21
easy to prepare nickel catalysts, containing tetraaza macrocyclic ligands (tetramethyltetraaza[14]annulene (MeTAA) or 6,15-dimethyl-8,17-diphenyltetraaza[14]annulene (MePhTAA)) are reported. A wide variety of substituted quinazolines were synthesized in moderate to high yields starting from cheap and easily available starting precursors. A few control reactions were performed to understand the mechanism
AgPd Nanoparticles Deposited on WO<sub>2.72</sub> Nanorods as an Efficient Catalyst for One-Pot Conversion of Nitrophenol/Nitroacetophenone into Benzoxazole/Quinazoline
作者:Chao Yu、Xuefeng Guo、Zheng Xi、Michelle Muzzio、Zhouyang Yin、Bo Shen、Junrui Li、Christopher T. Seto、Shouheng Sun
DOI:10.1021/jacs.7b01983
日期:2017.4.26
acid, 2-nitrophenol, and aldehydes into benzoxazoles in near quantitative yields under mild conditions. The catalysis can also be extended to the one-pot reactions of ammonium formate, 2-nitroacetophenone, and aldehyde for high yield syntheses of quinazolines. Our studies demonstrate a new catalyst design to achieve a green chemistry approach to one-pot reactions for the syntheses of benzoxazoles and quinazolines
Copper-catalyzed three-component one-pot synthesis of quinazolines
作者:Jia Ju、Ruimao Hua、Ji Su
DOI:10.1016/j.tet.2012.09.035
日期:2012.11
Two efficient approaches to multi-substituted quinazolines by the three-componentone-pot reaction of o-bromo aromatic ketones/aldehydes, ammonia water and aromatic aldehydes, or primary alcohols catalyzed by CuCl have been developed.
Ultrasound-Assisted Preparation of Copper(I) Oxide Nanocubes: High Catalytic Activity in the Synthesis of Quinazolines
作者:Amol B. Raut、Abhishek R. Tiwari、Bhalchandra M. Bhanage
DOI:10.1002/cctc.201601330
日期:2017.4.7
energy‐dispersive X‐ray spectroscopy, UV/Vis spectroscopy, differential scanning calorimetry with thermogravimetric analysis, and FTIR spectroscopy. The Cu2O nanocubes were employed as a heterogeneous nanocatalyst and were found to be highly active in the preparation of quinazolines by the tandem cyclization of 2‐bromobenzaldehydes with amidines under ligand‐free conditions. Various quinazolines could be prepared
The first Pd/C‐catalyzedoxidative C(sp3)−H bond amination of o‐nitroacetophenones with benzylamines or amino acids proceeding through C−N bond cleavage followed by C−N bond formation by a hydrogen‐transfer strategy was developed. These transformations proceeded smoothly in water to afford the desired quinazolines in moderate to good yields. This protocol has a broad substrate scope and good tolerance