Photochemical aryl radical cyclizations to give (E)-3-ylideneoxindoles
Michael Gurry1, Ingrid Allart-Simon2, Patrick McArdle1
1School of Chemistry, National University of Ireland Galway, University Road, Galway, Ireland.
Abstract:
(E)-3-Ylideneoxindoles are prepared in methanol in reasonable to good yields, as adducts of photochemical 5-exo-trig of aryl radicals, in contrast to previously reported analogous radical cyclizations initiated by tris(trimethylsilyl)silane and azo-initiators that gave reduced oxindole adducts.
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