![Methyl 3-({2'-[(E)-(hydroxyhydrazono)methyl]-4-biphenylyl}methyl)-2-oxo-2,3-dihydro-1H-benzimidazole-4-carboxylate structure](https://cnstatic.chemtradehub.com/structs/149/1499167-72-4-034a.webp "Methyl 3-({2'-[(E)-(hydroxyhydrazono)methyl]-4-biphenylyl}methyl)-2-oxo-2,3-dihydro-1H-benzimidazole-4-carboxylate structure")
Enynone-enabled migratory insertion and Schmittel cyclization cascade for the synthesis of furan-fused fluorenes
文献信息
发布日期
2019-02-21
DOI
10.1039/C9QO00045C
影响因子
5.281
作者
He Zhang, Tongxiang Cao, Hejiang Luo, Lianfen Chen, Shifa Zhu
查看原文
摘要
A new method for the synthesis of furan-/benzo-fused fluorenes through copper(I)-catalyzed coupling of conjugated enynones or α-diazocarbonyl compounds with dialkynylbenzenes has been developed. This process includes 5-exo-dig cyclization, carbene migratory insertion, Schmittel cyclization and 1,5-H transfer. The obvious advantages of wide substrate scopes, mild reaction conditions, and high atom efficiency make this system highly appealing for the construction of six-substituted benzofuran-embedded fluorenes in a one-pot manner.
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来源期刊
Organic Chemistry Frontiers
CiteScore:
7.8
自引率:
8.7%
年发文量:
724
Organic Chemistry Frontiers publishes high-quality research from across organic chemistry. Emphases are placed on studies that make significant contributions to the field of organic chemistry by reporting either new or significantly improved protocols or methodologies. Topics include, but are not limited to the following: Organic synthesis Development of synthetic methodologies Catalysis Natural products Functional organic materials Supramolecular and macromolecular chemistry Physical and computational organic chemistry
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