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.
Synthetic aspects of the oxidative amidation of phenols
作者:Huan Liang、Marco A. Ciufolini
DOI:10.1016/j.tet.2010.05.020
日期:2010.7
action of hypervalent iodine reagents. The reagent, (diacetoxyiodo)benzene (‘DIB’) is especially effective in these transformations. This paper focuses on techniques for the desymmetrization of the dienoes thus obtained, leading to the stereocontrolled creation of N-substituted spiro carbons. The methodology creates new opportunities in alkaloid synthesis, as apparent from a number of examples.