Copper/Palladium-Catalyzed Cyclization/Cross-Coupling Cascade Reaction of 2-<i>gem</i>
-Dibromovinyl Aryl Selenides: Synthesis of 2-Substituted Benzo[<i>b</i>
]selenophenes
作者:Filipe N. Bilheri、Renan P. Pistoia、Davi F. Back、Gilson Zeni
DOI:10.1002/adsc.201701095
日期:2017.12.11
2‐bromobenzo[b]selenophenes was also studied by palladium‐catalyzed reactions with boronic acids, Grignardreagents and methyl acrylate affording the cross‐coupled products in good yields. In addition, the reaction of 2‐bromobenzo[b]selenophene towards halogen‐lithium exchange reactions followed by the addition of aldehyde afforded the corresponding secondary alcohol.
铜/钯催化的多组分环化反应,其结合2-宝石-dibromovinyl芳硒化物与亲核源,分别适用于2-取代的苯并[合成b ]硒吩。对环化系统的系统研究表明,铜盐和钯盐之间的相互作用对于以高收率形成产物至关重要,避免了氢化苯并[ b ]硒代苯的形成。还通过钯与硼酸,格氏试剂和丙烯酸甲酯的钯催化反应研究了2-溴苯并[ b ]硒代苯的多功能性,从而以良好的收率获得了交叉偶联的产物。另外,2-溴苯并[ b]的反应]硒烯进行卤素-锂交换反应,然后添加醛,得到相应的仲醇。