Abstract

A short and efficient synthesis of the 1,2-dihydro-3H-pyrrolo[3,2-e]indole ( 2) ring system of the antitumor antibiotic CC-1065 ( 1 ) from ethyl-5-aminoindole-2-carboxylate 3 was made possible by the inherent regioselectivity of the [2,3] sigmatropic rearrangement of the azasulfonium ylide 4 and a thiation-reduction sequence for oxindole to indoline conversion.

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