D.L. Browne,* I.R. Baxendale, S.V. Ley, Tetrahedron 2011, 67, 10296-10303.
A key intermediate for the synthesis of hydrazines via a mild, metal free reduction of diazonium salts has been isolated and characterized by X-ray analysis. The presence of this intermediate is general, as demonstrated by the preparation of a number of analogues. A discussion of the mechanism and potential benefits of such a process are also described.