Abstract
Hydrazones 12A, B, F furnish annulated indenone derivatives (6-azafulvenes) 13A- D upon deprotonation with T-BuOK in DMF at 50 °C. In contrast, deprotonation of a similar N-methyl -hydrazone 12D unexpectedly leads to the isoquinoline derivative 15. Mechanisms for both transformations are proposed, supported by quantum chemical density functional theory (DFT) and AB INITIO calculations.
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