Reusable Co-nanoparticles for general and selective <i>N</i>-alkylation of amines and ammonia with alcohols
作者:Zhuang Ma、Bei Zhou、Xinmin Li、Ravishankar G. Kadam、Manoj B. Gawande、Martin Petr、Radek Zbořil、Matthias Beller、Rajenahally V. Jagadeesh
DOI:10.1039/d1sc05913k
日期:——
A general cobalt-catalyzed N-alkylation of amines with alcohols by borrowing hydrogen methodology to prepare different kinds of amines is reported. The optimal catalyst for this transformation is prepared by pyrolysis of a specific templated material, which is generated in situ by mixing cobalt salts, nitrogen ligands and colloidal silica, and subsequent removal of silica. Applying this novel Co-nanoparticle-based
Practical copper-promoted N-alkylation and bromination of arylamines/indazoles with alkyl bromides are described; the N-alkylation-C-4-bromination and N-dialkylation-C-4-bromination of arylamines, and N-alkylation-C-3-bromination of indazoles, with alkyl bromides have been analyzed. The full use of alkyl bromides as alkylating and brominating building blocks without atom wastage, indicating excellent