Tetrahedron p. 1443 - 1450 (1996)
Update date:2022-07-31
Topics:
Risitano, Francesco
Grassi, Giovanni
Caruso, Francesco
Foti, Francesco
2-Arylbenzimidazolines (8), generated in situ from o-phenylenediamine (7) and the appropriate arylaldehydes, by reaction with 4-arylmethylene pyrazol-5-ones (1) or isoxazol-5-ones (2) produce the 4-arylmethyl derivatives (3) or (4) and the C,C- (5) or the C,N-linked dimers. The reaction was rationalised on the basis of the role of 2-arylbenzimidazoline as a reducing agent and proceeds by a non-chain, free radical process involving one-electron transfer.
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