Benati Luisa, Bencivenni Giorgio, Leardini Rino, Minozzi Matteo, Nanni Daniele, Scialpi Rosanna, Spagnolo Piero, Zanardi Giuseppe, Rizzoli Corrado
Dipartimento di Chimica Organica A. Mangini, Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy.
Org Lett. 2004 Feb 5;6(3):417-20. doi: 10.1021/ol036268n.
[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.
[反应:见正文] 由Bu(3)SnH与叠氮烷基丙二腈发生自由基反应生成的锡烷基氨基自由基,能高效地对任一腈基进行5-外式和6-外式环化反应,生成氨基亚氨基自由基,该自由基进而被还原为脒,或对内部烯烃进行连续的5-外式环化反应。