Oxidative Spirocyclization of Phenolic Sulfonamides: Scope and Applications
作者:Huan Liang、Marco A. Ciufolini
DOI:10.1002/chem.201001402
日期:2010.11.22
A full account of the oxidative dearomatization of para‐ and ortho‐phenolic sulfonamides is provided together with an overview of the chemistry of the products and their elaboration to buildingblocks for spirocyclic alkaloids. A concise total synthesis of putative lepadiformine complements the discussion.
A convenient synthesis of ( E )-conjugated polyene sulfonyl derivatives with excellent stereospecificity
作者:Chunyan Yu、Zhongwen Lv、Sheng Xu、Jun Zhang
DOI:10.1016/j.tetlet.2018.05.060
日期:2018.8
A highly selective synthesis of conjugated polyene sulfonyl derivatives is described via the elimination of disulfonyl chloride with readily accessible raw material dihaloalkane. The protocol offers a convenient way to form sulfonamides, sulfonates and even sulfones. Furthermore, this method was manipulated under mild condition with simple operation in high yield to afford only trans products.
Tandem Phenolic Oxidative Amidation−Intramolecular Diels−Alder Reaction: An Approach to the Himandrine Core
作者:Huan Liang、Marco A. Ciufolini
DOI:10.1021/ol1003669
日期:2010.4.16
An oxidative cyclization of dienic sulfonamides mediated by iodobenzene diacetate in TFA, followed by a tandem intramolecular Die Is Alder reaction, achieves desymmetrization of a "locally symmetrical" dienone with good levels of diastereoselectivity and leads to valuable synthetic intermediates for the himandrine alkaloids.