Preparation of 4-arylquinazolines with<i>o</i>-(<i>N</i>-alkyl,<i>N-p</i>-tosyl)aminobenzonitriles, aryllithiums, and NIS
作者:Hiroki Naruto、Hideo Togo
DOI:10.1039/d0ob01223h
日期:——
The treatment of o-(N-alkyl,N-p-tosyl)aminobenzonitriles with aryllithiums, followed by the reaction with water, NIS under irradiation with a fluorescent lamp, and then tBuOK gave 2-alkyl-4-arylquinazolines or 4-arylquinazolines in good to moderate yields. The present reaction proceeds through the formation of N-iodoimines from imines with NIS, the generation of iminyl radicals, the 1,6-H shift by
I<sub>2</sub>-Catalyzed Aerobic Oxidative C(sp<sup>3</sup>)–H Amination/C–N Cleavage of Tertiary Amine: Synthesis of Quinazolines and Quinazolinones
作者:Yizhe Yan、Ying Xu、Bin Niu、Huifang Xie、Yanqi Liu
DOI:10.1021/acs.joc.5b00474
日期:2015.6.5
An iodine-catalyzedoxidative C(sp3)–H amination/C–N cleavage of tertiaryamines couducted under an oxygen atmosphere has been developed and affords a route to quinazolines and quinazolinones in good to excellent yields via a domino ring annulation. The method is metal-free, peroxide-free, and operationally simple to implement with a wide scope of substrates and represents a new avenue for multiple
Palladium(II)-Catalyzed Three-Component Tandem Cyclization Reaction for the One-Pot Assembly of 4-Arylquinazolines
作者:Guolin Zhang、Yongping Yu、Zijuan Wang、Wenteng Chen、Chang He
DOI:10.1055/s-0040-1707329
日期:2021.4
Abstract A one-pot method for joining three separate components leading to an assortment of 4-arylquinazolines (27 examples) in good to excellent yields is described. The method consists of a palladium(II)-catalyzed cascadereaction involving C(sp)–C(sp2) coupling followed by intramolecular C–N bond formation. The reaction was readily scaled up to gram quantity and successfully applied to the synthesis
“On‐Water” Palladium‐Catalyzed Tandem Cyclization Reaction for the Synthesis of Biologically Relevant 4‐Arylquinazolines
作者:Shuo Yuan、Bin Yu、Hong‐Min Liu
DOI:10.1002/chem.201903464
日期:2019.10.11
The quinazoline scaffold is prevalent in pharmaceutically relevant molecules that show diverse biological activities. Herein, we report an efficient "on-water" palladium-catalyzed tandem cyclization reaction from commercially available arylboronic acids and benzonitriles that enable the rapid access to 4-arylquinazoline scaffolds in good to excellent yields (45 examples, up to 98 % yield). This protocol