Abstract
Abstract1,3‐Dipolar cycloaddition of azomethine ylides, generated in situ via decarboxylative condensation of isatins (I) and (IX) and sarcosine (II) or (L)‐proline (X), to naphthoquinone (III), followed by spontaneous dehydrogenation afford the spirooxindoles (IV) and (XI), resp., in high yields.
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