Quinazoline-directed selective ortho-iodination for the synthesis of 2-(2-iodoaryl)-4-arylquinazolines
摘要:
Palladium-catalyzed ortho-iodination of 2, 4-diarylquinazolines via C-H activation is described. These palladium catalytic quinazoline-directed mono-iodination reactions are very efficient, highly selective and with a broad substrate scope, producing the corresponding 2-(2-iodoaryl)-4-arylquinazolines with good yields. (C) 2017 Published by Elsevier B.V.
The first example of the palladium-catalyzed, three-component tandem reaction of 2-aminobenzonitriles, aldehydes, and arylboronic acids has been developed, providing a new approach for one-pot assembly of diverse quinazolines in moderate to good yields. A noteworthy feature of this method is the tolerance of bromo and iodo groups, which affords versatility for further synthetic manipulations. Preliminary
Rhodium-Catalyzed Regioselective Direct C-H Amidation of 2,4-Diarylquinazoline with Sulfonyl Azides: An Example of Steric Hindrance Regulated Mono- and Diamidation Selectivity
An unprecedented sterichindrance controlled regioselectiverhodium-catalyzeddirectC–Hamidation of 2,4-diarylquinazoline was described. Sulfonylazides were used as the amine source to provide a variety of amide-functionalized 2,4-diarylquinazolines in high efficiency. The reaction proceeded under mild conditions, had good functional group tolerance with a broad scope of substrates, and afforded
Alkyltrifluoroborates were used for Rh(III)-catalyzed ortho-alkylation of 2,4-disubstituted quinazoline via C–H bond activation. The reaction proceeded well with a broad substrate scope, providing a direct way to access high functional quinazoline core structure derivatives in yields up to 95%.
Efficient aerobic oxidative synthesis of 2-aryl quinazolines via benzyl C–H bond amination catalyzed by 4-hydroxy-TEMPO
作者:Bing Han、Chao Wang、Run-Feng Han、Wei Yu、Xiao-Yong Duan、Ran Fang、Xiu-Long Yang
DOI:10.1039/c1cc12308d
日期:——
A novel and efficient aerobic protocol for the oxidative synthesis of 2-aryl quinazolinesviabenzyl C-H bond amination by a one-pot reaction of arylmethanamines with 2-aminobenzoketones and 2-aminobenzaldehydes has been carried out using the 4-hydroxy-TEMPO radical as the catalyst, without any metals or additives.
The first nickel-catalyzedcross-couplingreactions between fluoroarenes and aryl organometallics using commercially available ligands are described. The nickel-catalyzedcross-couplingreactions between arylGrignardreagents and fluoroazines and -diazines occurred in THF at room temperature using commercially available 1,2-bis(diphenylphosphino)ethane, 1,3-bis(diphenylphosphino)propane, or 1,1'-