描述了通过苯并环丁烯酮的CC裂解的Co(0)催化的分子内炔烃/苯并环丁烯酮偶联。Co 2(CO)8 / P [3,5-(CF 3)2 C 6 H 3 ] 3据发现,铑是一种有效的金属/配体组合,与先前建立的铑催化剂相比具有互补的催化活性。特别地,C8-取代的底物在Rh系统中失败,但是在Co催化下成功。实验和计算研究表明,最初形成的四面体二钴-炔烃复合物通过与Co(0)氧化加成后经历C1-C2活化,然后通过迁移插入和还原消除得到β-萘酚产物。
Divergent Syntheses of Fused β-Naphthol and Indene Scaffolds by Rhodium-Catalyzed Direct and Decarbonylative Alkyne-Benzocyclobutenone Couplings
作者:Peng-hao Chen、Tao Xu、Guangbin Dong
DOI:10.1002/anie.201310100
日期:2014.2.3
A tunable rhodium‐catalyzed intramolecular alkyne insertion reaction proceeding through the CC cleavage of benzocyclobutenones is described. Selective formation of either the direct or decarbonylative insertion product can be controlled by using different catalytic systems. A variety of fused β‐naphthol and indene scaffolds were obtained in good yields with high functional group tolerance. This work