Transition metal-catalyzed diamination by hydroxylamines is a common approach for making three-membered aziridines,while its use for building the larger N-heterocycles is still underdeveloped.Herein,we report an effic...Transition metal-catalyzed diamination by hydroxylamines is a common approach for making three-membered aziridines,while its use for building the larger N-heterocycles is still underdeveloped.Herein,we report an efficient Pd(0)-catalyzed intermolecular[4+1]annulation of o-bromo(or chloro)-biaryls with bifunctional secondary hydroxylamines for the one-step assembly of synthetically useful carbazoles.Noteworthily,a linchpin for this domino reaction was the judicious selection of both the amino-sources and Pd(0)-catalysts for enabling the prerequisite oxidative addition of aryl halides to Pd(0)-species in the presence of hydroxylamines with a labile N-O bond.展开更多
基金supported by the National Natural Science Foundation of China(21925108,22171225)。
文摘Transition metal-catalyzed diamination by hydroxylamines is a common approach for making three-membered aziridines,while its use for building the larger N-heterocycles is still underdeveloped.Herein,we report an efficient Pd(0)-catalyzed intermolecular[4+1]annulation of o-bromo(or chloro)-biaryls with bifunctional secondary hydroxylamines for the one-step assembly of synthetically useful carbazoles.Noteworthily,a linchpin for this domino reaction was the judicious selection of both the amino-sources and Pd(0)-catalysts for enabling the prerequisite oxidative addition of aryl halides to Pd(0)-species in the presence of hydroxylamines with a labile N-O bond.
