The NiCl2•2H2O-Li-Arene (cat.) combination as reducing system, part 6 -: Reduction of hydrazines, azo and azoxy compounds, and amine N-oxides with the NiCl2•2H2O-Li-DTBB (cat.) combination

The NiCl2. 2H(2)O/Li/DTBB (10 mol%) combination allows the reduction of aromatic hydrazines 1 (to amines), azo compounds 2 (to primary amines), azoxy compounds 3 (to azo compounds or to primary amines, depending on the reaction conditions) or amine N-oxides 4 (to tertiary amines), under mild reaction conditions (THF, room temperature). (C) 2000 Elsevier Science Ltd. All rights reserved.