Tin-free radical sequences under acidic conditions. Convergent access to azole-containing structures.

Abstract : [reaction: see text] Various xanthates add efficiently to olefins bearing [1,2,4]triazole, imidazole, or benzimidazole moieties in the presence of camphorsulfonic acid via a radical chain reaction initiated by a small amount of lauroyl peroxide. The adducts may be transformed to more complex molecules by implementing a further radical cyclization.
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Fabien Gagosz, Samir Zard. Tin-free radical sequences under acidic conditions. Convergent access to azole-containing structures.. Organic Letters, American Chemical Society, 2002, 4 (24), pp.4345-4348. ⟨10.1021/ol0270024⟩. ⟨hal-00969328⟩

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