[reaction: see text] The addition of aryl- and heteroarylboronic acids to azo compounds is described. Copper salt catalysis was necessary to perform the reaction under mild conditions and high yields. Excellent regioselectivity was observed in addition to unsymmetrical azo compounds.

The reductive pinacol coupling of aldimines was studied in respect to different coupling-mediators such as mischmetall, Zn-Cu couple and Devarda alloy. High diastereoselectivity was achieved for three substrates. A simple procedure for the preparation of 1,2-diamines is described.

A new efficient technique for Boc introduction into hydrazines and amines is reported. The substrate is stirred in molten di-(tert-butyl)dicarbonate without any solvent. The method requires neither DMAP nor other catalyst. The scope of the method is demonstrated using several hydrazines and amines.

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