Herein, we demonstrated an efficient protocol for reductivealkylation of azides/nitro compounds via a borrowing hydrogen (BH) method. By following this protocol, selective mono- and dialkylated amines were obtained under mild and solvent-free conditions. A series of control experiments and deuterium-labeling experiments were performed to understand this catalytic process. Mechanistic studies suggested
Mechanistic Studies of the Copper-Catalyzed Electrophilic Amination of Diorganozinc Reagents and Development of a Zinc-Free Protocol
作者:Matthew J. Campbell、Jeffrey S. Johnson
DOI:10.1021/ol0702829
日期:2007.4.1
mechanism for the copper-catalyzed amination of diorganozincreagents by O-benzoyl-N,N-dialkylhydroxylamines is supported by following stereochemically defined organometallics through the reaction and by employing the endocyclic restriction test. A copper-catalyzed electrophilic amination of organomagnesium compounds is also described in which the use of zinc halides has been eliminated.
Selective N-Alkylation of Amines with Alcohols by Using Non-Metal-Based Acid-Base Cooperative Catalysis
作者:Ya Du、Shunsuke Oishi、Susumu Saito
DOI:10.1002/chem.201102446
日期:2011.10.24
straightforward method for the selective N‐mono‐ and dialkylation of amines with alcohols by means of non‐metal‐based catalysis promoted by TAPC is reported (see scheme). Selectivity of the N‐mono‐ and dialkylation, substrate scope and functional‐group tolerance are highlighted with respect to each amine (1° and 2°; aromatic and aliphatic) and alcohol (1°, 2° and 3°; benzylic and aliphatic) component.
and green method for the selectivesynthesis of tertiary amines has been developed that involves iridium-catalyzed alkylation of various primary amines with aromatic or aliphatic alcohols. Notably, the catalytic protocol enables this transformation in the absence of additional base and solvent. Furthermore, the alkylation of nitrobenzene with primary alcohol to tertiary amine has also been achieved by
A Highly Para-Selective Copper(II)-Catalyzed Direct Arylation of Aniline and Phenol Derivatives
作者:Claire-Lise Ciana、Robert J. Phipps、Jochen R. Brandt、Falco-Magnus Meyer、Matthew J. Gaunt
DOI:10.1002/anie.201004703
日期:2011.1.10
In short order: A copper‐catalyzed Friedel–Crafts‐type strategy has been developed for the title reaction. An iterative CH arylation strategy has also been demonstrated for the functionalization of anilines by sequentially delivering different aromatic groups to the para, ortho, and meta positions (see scheme, Bn=benzyl, Piv=pivaloyl).