Preparation of Heterocyclic Amines via a Copper(I)-Mediated Oxidative Cross-Coupling of Organozinc Reagents with Lithium Amides
作者:Paul Knochel、Cora Dunst、Marcel Kienle
DOI:10.1055/s-0029-1220008
日期:2010.7
Functionalized heteroaromatic amines are readily prepared by the oxidative coupling of polyfunctional zinc amidocuprates using PhI(OAc)2 as oxidant. Various sensitive heterocyclic organometallics undergo this oxidativecross-coupling reaction furnishing aminated heteroaromatics. A high functional group tolerance and relative insensibility to steric hindrance characterize this general amination reaction
An electron was found to catalyze the coupling of magnesium diarylamides with aryl iodides giving triarylamines through a radical‐anion intermediate. The transformation requires no transition metal catalysts or additives, and a wide array of products are formed in good‐to‐excellent yields.
Preparation of Heterocyclic Amines by an Oxidative Amination of Zinc Organometallics Mediated by CuI: A New Oxidative Cycloamination for the Preparation of Annulated Indole Derivatives
作者:Marcel Kienle、Andreas J. Wagner、Cora Dunst、Paul Knochel
DOI:10.1002/asia.201000367
日期:2011.2.1
Functionalized heterocyclic zinc reagents are easily aminated by an oxidativeaminationreaction of zinc amidocuprates prepared from various lithium amides. For the oxidation step, PhI(OAc)2 proved to be the best reagent. The required heterocyclic zinc organometallics can be prepared either by direct metalation, by magnesium insertion in the presence of ZnCl2, or by transmetalation of a suitable magnesium