Catalytic asymmetric ring-opening of bridged tricyclic anhydrides

  • Aitken R
  • Gopal J
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Cinchona alkaloid catalysed methanolysis of three different achiral tricyclic anhydrides provides convenient access to either enantiomer of the corresponding half-esters in 35-67% enantiomeric excess; the absolute configuration of the products has been determined and a convenient procedure developed for preparation of multigram quantities of either enantiomer of one half-ester in ∼90% e.e. © 1990.

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  • R. Alan Aitken

  • Jayalakshmi Gopal

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