Answers are grounded in this paper and cite their sources.
[reaction: see text] Stannylaminyl radicals derived from radical reactions of Bu(3)SnH with azidoalkylmalononitriles exhibit highly efficient 5- and 6-exo cyclization onto either nitrile group to give aminoiminyl radicals that in turn are reduced to amidines or undergo successive 5-exo cyclization onto an internal alkene.
No takes yet. Share an insight, caveat, or question.
Benati et al. (2004) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: