Highly efficient method for coriolin synthesis

  • Domon K
  • Masuya K
  • Tanino K
 et al. 
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Formal total synthesis of coriolin has been accomplished on the basis of a [3+2] cycloaddition reaction of a vinylsulfide with 3-(methylthio)-2-siloxyallyl cation. A five-membered vinylsulfide as a C ring unit was prepared in five steps from commercially available compounds. The first [3+2] cycloaddition reaction gave the BC ring intermediate, which was then converted into a bicyclic vinylsulfide in three steps. The construction of the A ring by the second [3+2] cycloaddition reaction followed by two-step-conversion afforded the tricyclic enone (30% overall yield from isobutyronitrile) which has previously been synthesized and converted into coriolin.

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