Anionic cyclisations of an N-benzyl naphthamide: a route to benzo[e]isoindolones

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Anjum Ahmed, Jonathan Clayden and Michael Rowley


Abstract

On treatment with ButLi and HMPA, N-tert-butyl-N-benzyl-1-naphthamide undergoes cyclisation to a tricyclic enolate which reacts diastereoselectively with electrophiles to give substituted 2,3,3a,9b-tetrahydro-1H-benzo[e]isoindol-1-ones, the first example of an anionic cyclisation onto an aromatic ring.


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