Thermal or acid catalyzed cyclization of several N-(N-arylbenzimidoyl)-1,4-benzoquinoneimines 2 affords 1-aryl-6-hydroxy-2-phenylbenzimidazoles 3 in fairly good yields.Structural proofs and kinetic support for the reaction mechanism are given.
Benincori, T.,Sannicolo, F.
p. 1029 - 1033
(2007/10/02)
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