Sulfonic acid supported on hydroxyapatite-encapsulated-γ-Fe2O3 nanocrystallites as a magnetically separable catalyst for one-pot reductive amination of carbonyl compounds
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
AlCl3 has been employed for highly chemoselectivereductive amination of carbonylcompounds in ethanol using polymethylhydrosiloxane as an inexpensive, stable and safe reducingagent without an inert atmosphere. A large range of functional groups such as nitro, carboxylic acid, acetyl, nitrile, halogen, methoxy, alkene and heterocycles were well tolerated. AlCl3 also catalyzed tandem amination–amidation