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Cycloadditions are powerful processes to synthesize complex polycyclic scaffolds. Herein, we disclose a [4+3]‐cycloaddition between an in situ generated ortho‐quinone methide and an isomünchnone to yield oxa‐bridged oxazocine cores, generating N2 and H2O as the sole by‐products. Using only catalytic amounts of camphorsulfonic acid, it is possible to generate both reactive intermediates in one step,...
This chapter discusses the various methods for the preparation of oxabicyclic compounds, with an emphasis on the stereo- and enantioselective synthesis of these substances. Methods to desymmetrize meso oxabicyclic compounds are also presented. The utility of these substrates for organic synthesis is demonstrated by the many strategies available for ring-opening the bicyclic compounds to yield cyclic...
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