Note:
The @R05194@ formally amounts to a 1,2-shift of the imino group and 'bond formation' between the C(3) and C(5) carbon atoms of the azadiene skeleton. 1-Aza-1,4-@D01699@ also undergo the @R05194@ to cyclopropylimines using electron-acceptor and electron-donor @S05610@ via radical-@C00907@ and radical-@A00358@ intermediates, respectively. 2-Aza-1,4-@D01699@ rearrange to N-vinylaziridines on @I03255@ using electron-acceptor sensitizers. In this instance the reaction amounts to a 1,2-shift of the alkene unit and 'bond formation' between the C(1) and C(3) carbon atoms of the azadiene skeleton.