Expeditive Syntheses of Functionalized Pentahelicenes and NC-AFM on Ag(001)
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- 作者：Sarah Goretta ; Christelle Tasciotti ; Simon Mathieu ; Mario Smet ; Wouter Maes ; Yoann M. Chabre ; Wim Dehaen ; Richard Giasson ; Jean-Manuel Raimundo ; Claude R. Henry ; Clemens Barth ; Marc Gingras
- 刊名：Organic Letters
- 出版年：2009
- 出版时间：September 3, 2009
- 年：2009
- 卷：11
- 期：17
- 页码：3846-3849
- 全文大小：273K
- 年卷期：v.11,no.17(September 3, 2009)
- ISSN：1523-7052
文摘
One of the shortest and most efficient routes toward a series of functionalized pentahelicenes is reported. Benzylic (dibromo)methine coupling is an important entry into functional helicene chemistry. It allowed a mono- or a double functionalization by some metal-catalyzed Ar−C, Ar−S, Ar−CN, and Ar−I bond formations. Those functions offer new avenues for further applications. For instance, helicene (4) can be supported on a Ag(001) surface, which was characterized by high-resolution NC-AFM imaging.