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‐oxo carboxylic acids resulting in 5H‐benzo[4,5][1,3]oxazino[2,3‐a]isoindole‐5,11(6aH)‐diones using (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。