A copper(II)‐mediated diamination of 1,3‐butadienes is reported. The reaction employs an inorganic base, copper dibromide as a reagent, and saccharin as the nitrogen source. The diamination proceeds for a series of 1,3‐butadienes under relatively mild conditions with complete selectivity in favor of the 1,4‐oxidation products.
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Martínez et al. (2014) studied this question.
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