Tetrahedron Letters p. 451 - 454 (1995)
Update date:2022-08-04
Topics:
Guidotti, Simona
Leardini, Rino
Nanni, Daniele
Pareschi, Patrizia
Zanardi, Giuseppe
Imidoyl radicals 4a-d, obtained by hydrogen abstraction from imines 1a-d, give 7-membered cyclisation leading to oxazapines 2a-d.The intermediate spirocyclohexadienyl radicals of the competitive 6-membered ring closure (6a-d) rearrange to aryloxy radicals , giving benzophenones 3a-d: the whole process entails a novel 1,5-aryl radical translocation from an oxygen to a carbon atom.
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