A copper-catalyzed Ritter-type cascade via iminoketene for the synthesis of quinazolin-4(3H)-ones and diazocines
作者:Takumi Abe、Koshiro Kida、Koji Yamada
DOI:10.1039/c7cc01406f
日期:——
We have developed a copper-catalyzed Ritter-type reaction/cyclization cascade of anthranilic acids and nitriles, affording the quinazolin-4(3H)-ones and diazocines.
Fe<sub>3</sub>O<sub>4</sub>nanoparticle-supported copper(I): magnetically recoverable and reusable catalyst for the synthesis of quinazolinones and bicyclic pyrimidinones
作者:Lin Yu、Min Wang、Pinhua Li、Lei Wang
DOI:10.1002/aoc.2902
日期:2012.11
A highly efficient, easily recoverable and reusable Fe3O4 magnetic nanoparticle‐supported Cu(I) catalyst has been developed for the synthesis of quinazolinones and bicyclicpyrimidinones. In the presence of supported Cu(I) catalyst (10 mol%), amidines reacted with substituted 2‐halobenzoic acids and 2‐bromocycloalk‐1‐enecarboxylic acids to generate the corresponding N‐heterocycle products in good to
One-Pot Synthesis of Isoxazole-Fused Tricyclic Quinazoline Alkaloid Derivatives via Intramolecular Cycloaddition of Propargyl-Substituted Methyl Azaarenes under Metal-Free Conditions
A practical method was developed for the convenient synthesis of isoxazole-fused tricyclic quinazoline alkaloids. This procedure accesses diverse isoxazole-fused tricyclic quinazoline alkaloids and their derivatives via intramolecular cycloaddition of methyl azaarenes with tert-butyl nitrite (TBN). In this method, TBN acts as the radical initiator and the source of N–O. Moreover, this protocol forms
Asymmetric Allylic Substitution‐Isomerization for the Modular Synthesis of Axially Chiral <i>N</i>‐Vinylquinazolinones
作者:Jia‐Yu Zou、Yu‐Ying Yang、Jun Gu、Fei Liu、Zhiwen Ye、Wenbin Yi、Ying He
DOI:10.1002/anie.202310320
日期:2023.10.2
Herein, we report asymmetric allylic substitution-isomerization for the regio- and atroposelective synthesis of axially chiral N-vinylquinazolinones. The catalysis system was achieved by means of asymmetric transition-metal catalysis and organocatalysis which afforded trisubstituted as well as E- and Z-tetrasubstituted N-vinylquinazolinone atropisomers, respectively.
A totalsynthesis strategy was developed for the synthesis of luotonin A, B and their analogues using synergistic FeCl3/KI-catalyzed oxidative cyclization. This protocol utilizes cheap and widely available N-propargyl 2-methyl-quinazolinones and arylamines under mild conditions, and it has a wide substrate scope and high atom economy. Different natural products (luotonin A, B and derivatives) can be