Copper-Assisted/Copper-Free Synthesis of Functionalized Dibenzo[<i>b</i>,<i>f</i>]oxepins and Their Analogs<i>via</i>a One-Pot Tandem Reaction
作者:Yuqin Wang、Yanhong Chen、Qian He、Yuyuan Xie、Chunhao Yang
DOI:10.1002/hlca.201200116
日期:2013.2
formation of functionalized dibenzo[b,f]oxepins and their analogs bearing both electron‐donating and electron‐withdrawing groups has been developed via a one‐pot cascade reaction. Most starting materials are commercially available 2‐(2‐hydroxyphenyl)acetonitriles and 2‐haloarylaldehydes. The procedure makes use of Cs2CO3 as the base, and DMF as solvent under copper‐assisted/copper‐free conditions. The
通过一锅级联反应,已经开发出一种简单,方便,有效的方法来形成官能化的二苯并[ b,f ]氧杂环庚烷及其类似物,同时带有给电子基团和吸电子基团。大多数起始原料是市售的2-(2-羟苯基)乙腈和2-卤代芳基醛。该程序利用了Cs 2 CO 3在铜辅助/无铜条件下,其作为基体,而DMF作为溶剂。该反应对底物具有全面的基团耐受性。大多数反应均在1小时内以良好至优异的产率完成,并且反应温度相对较低。该方案可按比例放大至克,而不会降低产量。还提出了反应机理。