Transient amino-hydrazino-carbenes:: A radical pathway for intramolecular 1,2-migration reactions

The transient amino-hydrazino-carbenes 2c-e are reported to undergo intramolecular 1,2-migration reactions that proceed through a radical pathway according to DFT calculations. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007).