Copper-Catalyzed C-N, C-O Coupling Reaction of Arylglyoxylic Acids with Isatins
作者:Rashmi Prakash、Sanjib Gogoi
DOI:10.1002/adsc.201600516
日期:2016.10.6
The copper(II)‐catalyzed decarboxylative couplingreactions of arylglyoxylic acids with isatins afford 4H‐benzo[d][1,3]oxazin‐4‐ones via decarbonylation and concurrent C–N, C–O bond formation.
芳基乙醛酸与Isatin的铜(II)催化的脱羧偶联反应通过脱羰作用和同时的C–N,C–O键形成提供4 H-苯并[ d ] [1,3]恶嗪-4-酮。
Palladium‐Catalyzed Decarboxylative Synthesis of 5
<i>H</i>
‐Benzo[4,5][1,3]oxazino[2,3‐
<i>a</i>
]isoindole‐5,11(6a
<i>H</i>
)‐Diones using 2‐Phenyl‐4
<i>H</i>
‐Benzo[
<i>d</i>
][1,3]oxazin‐4‐Ones and α‐Oxo Carboxylic Acids
作者:Ram Sunil Kumar Lalji、Prashant Kumar、Mohit Gupta、Virinder S. Parmar、Brajendra K. Singh
DOI:10.1002/adsc.201901142
日期:2020.2.6
A Pd‐catalyzed novel and efficient protocol has been developed for the direct functionalization of 2‐phenyl‐4H‐benzo[d][1,3]oxazin‐4‐ones with α‐oxocarboxylicacids resulting in 5H‐benzo[4,5][1,3]oxazino[2,3‐a]isoindole‐5,11(6aH)‐dionesusing (NH4)2S2O8 as effective oxidant and AgNO3 as co‐oxidant. All the explored substrates were found to be compatible for this transformation and delivered the corresponding
已开发出一种Pd催化的新颖有效的方案,可将2-苯基-4- H-苯并[ d ] [1,3]恶嗪-4-酮与α-氧代羧酸直接官能化,生成5 H-苯并[ 4,5] [1,3]恶嗪基[2,3 - a ]异吲哚-5,11 (6a H)-二酮使用(NH 4)2 S 2 O 8作为有效氧化剂,AgNO 3作为共氧化剂。发现所有探索的底物均适用于该转化,并以中等至优异的产率递送了相应的所需产物。
Recyclable Heterogeneous Palladium-Catalyzed Carbonylative Cyclization of 2-Iodoanilines with Aryl Iodides Leading to 2-Arylbenzoxazinones
作者:Zhaotao Xu、Bin Huang、Zebiao Zhou、Mingzhong Cai
DOI:10.1055/s-0039-1690265
日期:2020.2
A highly efficient and practical heterogeneous palladium-catalyzedcarbonylative coupling of 2-iodoanilines with aryl iodides has been developed. The reaction occurs smoothly in toluene at 110 °C with N,N-diisopropylethylamine as base under carbon monoxide (5 bar) and offers a general and powerful tool for the construction of various valuable 2-arylbenzoxazinones with excellent atom-economy, high functional
A facile metal-free tandem ring-opening/ring-closing strategy was developed for the synthesis of oxazolines in good to excellent reaction yields under mild reaction conditions. This reaction essentially describes a novel tool for the heterocyclic conversion of benzoxazin-4-ones to 2,5-disubstituted oxazolines directly in one-pot.