Copper-Mediated Tandem C(<i>sp</i>
<sup>2</sup>
)-H Amination and Annulation of Arenes with 2-Aminopyridines: Synthesis of Pyrido-fused Quinazolinone Derivatives
作者:Jidan Liu、Jinhui Zou、Jiawei Yao、Guoshu Chen
DOI:10.1002/adsc.201701286
日期:2018.2.15
An efficient and convenient copper‐mediated tandem C(sp2)‐H amination and annulation of arenes with 2‐aminopyridines to provide 11H‐pyrido[2,1‐b]quinazolin‐11‐ones has been developed. A variety of benzamides and 2‐aminopyridines bearing different substituents are compatible with this transformation
开发了一种高效便捷的铜介导的串联C(sp 2)-H胺化和芳烃与2-氨基吡啶的环化反应,以提供11个H-吡啶并[ 2,1- b ]喹唑啉-11-酮的方法。各种带有不同取代基的苯甲酰胺和2-氨基吡啶与这种转化相容
Synthesis of Pyrido-Fused Quinazolinone Derivatives via Copper-Catalyzed Domino Reaction
simple and efficientsynthesis of 11H-pyrido[2,1-b]quinazolin-11-ones by Cu(OAc)2·H2O-catalyzed reaction of easily available substituted isatins and 2-bromopyridine derivatives has been developed. The reaction involves C–N/C–C bond cleavage and two C–N bond formations in a one-pot operation. This methodology is complementary to previously reported synthetic procedures, and two plausible reaction mechanisms
Serendipitous Synthesis of Pyridoquinazolinones <i>via</i> an Oxidative C–C Bond Cleavage
作者:Matthias Brendel、Priyanka R. Sakhare、Gaurav Dahiya、Parthasarathi Subramanian、Krishna P. Kaliappan
DOI:10.1021/acs.joc.0c00982
日期:2020.6.19
A direct one-pot copper-catalyzed oxidative C–C bond cleavage route to the synthesis of pyridoquinazolinones is described. This one-pot strategy involves a copper-catalyzed C–N coupling followed by concomitant C(sp3)–H oxidation and amidation via oxidative C–C bond cleavage under an O2 atmosphere to deliver the target molecules in high yields.
Palladium-Catalyzed Carbonylative Synthesis of <i>N</i>
-Heterocycles from 1-Chloro-2-fluorobenzenes
作者:Yang Yuan、Xiao-Feng Wu
DOI:10.1002/ejoc.201900232
日期:2019.3.21
A simple and efficient methodology for the synthesis of pyrido‐fused quinazolinones and dibenzoxazepinones has been developed. By palladium‐catalyzedcarbonylation/nucleophilic aromatic substitution reaction sequence, and with 1‐chloro‐2‐fluorobenzenes and 2‐aminopyridines or 2‐aminophenols as the starting materials, good yields of the desired products were be obtained.
Copper-catalyzed domino sequences: a new route to pyrido-fused quinazolinones from 2′-haloacetophenones and 2-aminopyridines
作者:Phuc H. Pham、Son H. Doan、Ngan T. H. Vuong、Vu H. H. Nguyen、Phuong T. M. Ha、Nam T. S. Phan
DOI:10.1039/c8ra03744b
日期:——
A new pathway to access pyrido-fused quinazolinones via a Cu(OAc)2-catalyzed domino sequential transformation between 2′-haloacetophenones and 2-aminopyridines was demonstrated. The solvent and base exhibited a remarkable effect on the transformation, in which the combination of DMSO and NaOAc emerged as the best system. Cu(OAc)2·H2O was more active towards the reaction than numerous other catalysts
证明了通过2'-卤代苯乙酮和 2-氨基吡啶之间的 Cu(OAc) 2催化多米诺连续转化获得吡啶并稠合喹唑啉酮的新途径。溶剂和碱对转化效果显着,其中DMSO和NaOAc的组合是最佳体系。 Cu(OAc) 2 ·H 2 O 比许多其他催化剂对反应更具活性。这种方法是新的,将补充以前合成吡啶并稠合喹唑啉酮的方案。