Novel substituted 1,2,4-trioxanes and 1,2,4-trioxepanes useful as anti-malarial and/or anticancer agents, and an improved method for their preparation, preferably involving a thiol-olefin co-oxygenation (TOCO) reaction between an allylic alcohol and a ketone.
Application of Thiol−Olefin Co-oxygenation Methodology to a New Synthesis of the 1,2,4-Trioxane Pharmacophore
作者:Paul M. O'Neill、Amira Mukhtar、Stephen A. Ward、Jamie F. Bickley、Jill Davies、Mario D. Bachi、Paul A. Stocks
DOI:10.1021/ol0492142
日期:2004.9.1
Thiol-olefin co-oxygenation (TOCO) of substituted allylic alcohols generates alpha-hydroxyperoxides that can be condensed in situ with various ketones to afford a series of functionalized 1,2,4-trioxanes in good yields. Manipulation of the phenylsulfenyl group in 4a allows for convenient modification to the spiro-trioxane substituents, and we describe, for the first time, the preparation of a new class of antimalarial prodrug.
Synthesis, in vitro and in vivo antimalarial assessment of sulfide, sulfone and vinyl amide-substituted 1,2,4-trioxanes prepared via thiol-olefin co-oxygenation (TOCO) of allylic alcohols
作者:Richard Amewu、Peter Gibbons、Amira Mukhtar、Andrew V. Stachulski、Stephen A. Ward、Charlotte Hall、Karen Rimmer、Jill Davies、Livia Vivas、John Bacsa、Amy E. Mercer、Gemma Nixon、Paul A. Stocks、Paul M. O'Neill
DOI:10.1039/b924319d
日期:——
Thiol-Olefin Co-Oxygenation (TOCO) methodology has been applied to the synthesis of a small library of weak base and polar 1,2,4-trioxanes. The 1,2,4-trioxane units synthesised exhibit remarkable stability as they survive base catalysed hydrolysis and mixed anhydride/amine coupling reactions. This unique stability feature has enabled a range of novel substitution patterns to be incorporated within