Synthesis of 2‐(2‐Hydroxyaryl)‐4
<i>H</i>
‐benzo[
<i>e</i>
][1,3]oxazin‐4‐ones by Palladium‐Catalyzed C(
<i>sp</i>
<sup>2</sup>
)−H Hydroxylation via Electro‐chemical Oxidation
作者:Hongfeng Wu、Qi An、Chaoyin He、Xiaodong Fan、Weihao Guo、Minghui Zuo、Chunzhao Xu、Rui Guo、Wenyi Chu、Zhizhong Sun
DOI:10.1002/adsc.202000173
日期:2020.6.15
More importantly, use anodic oxidation to avoid the use of potentially toxic and polluting oxidants. A gram‐scale direct electrochemical hydroxylation of 2‐phenyl‐4H ‐benzo[e ][1,3]oxazin‐4‐one was performed, and the hydroxylation product was applied to synthesize the drug deferasirox. In addition, the single crystal of 2‐(2‐hydroxyphenyl)‐4H ‐benzo[e ][1,3]oxazin‐4‐one was obtained and determined by
以Pd(OAc)2为催化剂,恶嗪环为导向基团和Oxone为羟基化作用开发了2-芳基-4 H-苯并[ e ] [1,3]恶嗪-4-酮的电化学直接邻羟基化反应试剂。在温和条件下获得了一系列羟基化产物,收率从中等到良好。该方法的特征在于良好的官能团耐受性和广泛的底物。更重要的是,使用阳极氧化以避免使用潜在的有毒和污染性氧化剂。的2-苯基-4-甲克级直接电化学羟化ħ苯并[ ë进行] [1,3]恶嗪-4-酮的合成,并应用羟基化产物合成地拉罗司。另外,获得了2-(2-羟基苯基)-4- H-苯并[ e ] [1,3]恶嗪-4-酮的单晶并通过X射线衍射测定。最后,提出了反应机理并通过循环伏安法(CV)进行了验证。该协议还提供了分子功能化的另一种电化学羟基化方法。