The operationally simple palladium-catalyzed double-bond migration without heteroatom-containing coordinating functional groups is described. Addition of TaCl5 as a second catalyst greatly enhanced the migration efficiency to provide β-alkylstyrenes through migration of up to a five-carbon chain. Both catalysts were commercially available, and the reaction occurred without external ligands under neutral
描述了操作简单的
钯催化的双键迁移,而没有含杂原子的配位官能团。TaCl 5作为第二种催化剂的加入极大地提高了迁移效率,可通过迁移多达五个碳链来提供β-烷基
苯乙烯。两种催化剂都是可商购的,并且在中性条件下在没有外部
配体的情况下进行反应。该反应通过产生π-烯丙基
钯物质进行,该反应使
烯丙基醚存在下烃的
化学选择性双键迁移成为可能。还使用FeCl 3作为第二催化剂证明了通过双键迁移实现的远程官能化。