Unusual 1,2-aryl migration in Pd(<scp>ii</scp>)-catalyzed aza-Wacker-type cyclization of 2-alkenylanilines
作者:So Won Youn、So Ra Lee
DOI:10.1039/c5ob00361j
日期:——
Hegedus aza-Wacker indole synthesis, we were intrigued with the fate of the aminopalladation intermediate if syn β-hydrogen is made inaccessible or unavailable. In contrast to our previously reported β-carbon elimination, cyclization of a variety of 2-alkenylaniline substrates under electrophilic palladium conditions unexpectedly afforded C3-substituted indoles. This unusual 1,2-migratory process was
受Hegedus aza-Wacker吲哚合成的启发,如果无法获得或无法获得顺式β-氢,我们会对氨基palpalation中间体的命运深感兴趣。与我们先前报道的β-碳消除相反,在亲电钯条件下,各种2-链烯基苯胺底物的环化出乎意料地提供了C3取代的吲哚。发现这种异常的1,2-迁移过程可在各种底物上以可预测的迁徙能力进行操作。提出了机械建议以合理化所观察到的底物依赖性,并且该意外发现可以为其他相关工艺提供机会。