A metal nanoparticle-based supramolecular approach for aqueous biphasic reactions
作者:Shilpa C. Mhadgut、Kumaranand Palaniappan、Muralidhara Thimmaiah、Stephen A. Hackney、Béla Török、Jian Liu
DOI:10.1039/b502181b
日期:——
β-cyclodextrin immobilized on Pd nanoparticles was successfully employed as an efficient phase-transfer catalyst in aqueous biphasic hydrogenation reactions.
Zr4+-Catalyzed Efficient Synthesis of α-Aminophosphonates
作者:J. S. Yadav、B. V. S. Reddy、K. Sarita Raj、K. Bhaskar Reddy、A. R. Prasad
DOI:10.1055/s-2001-18444
日期:——
Aldimines undergo nucleophilic addition with diethyl phosphite in the presence of a catalytic amount of zirconiumtetrachloride at ambienttemperature to afford the corresponding α-aminophosphonates in high yields with high selectivity.
Ruthenium N‐Heterocyclic Carbene Complexes for Chemoselective Reduction of Imines and Reductive Amination of Aldehydes and Ketones
作者:Lakshay Kathuria、Ashoka G. Samuelson
DOI:10.1002/ejic.202000069
日期:2020.6.30
Chemoselective reduction of imines to secondary amines is catalyzed efficiently by tethered and untethered, half‐sandwich ruthenium N‐heterocyclic carbene (NHC) complexes at room temperature. The untethered Ru‐NHC complexes are more efficient as catalysts for the reduction of aldimines and ketimines than the tethered complexes. Using the best untethered complex as a catalyst, electronic and steric
The present invention relates to methods of synthesising aziridines including isotopically labelled aziridines, said methods comprising contacting an imine or one or more precursors thereof with a diazo compound in the presence of a phosphoramide or a phosphoramide-derived catalyst. The present invention also relates to aziridines, modified aziridines and aziridine-derived compounds preparable by the aforementioned methods, and to phosphoramide or phosphoramide-derived catalysts suitable for use in such methods.
Catalyst‐Free and Solvent‐Free Facile Hydroboration of Imines
作者:Vipin K. Pandey、Siva Nagendra Reddy Donthireddy、Arnab Rit
DOI:10.1002/asia.201901016
日期:2019.10
A facile process for the catalyst-free and solvent-free hydroboration of aromatic as well as heteroaromatic imines is reported. This atom-economic methodology is scalable, compatible with sterically and electronically diverse imines, displaying excellent tolerance towards various functional groups, and works efficiently at ambient temperature in most of the cases, affording secondary amines in good