Microwave-assisted solvent-free and catalyst-free Kabachnik–Fields reactions for α-amino phosphonates
作者:Xue-Jun Mu、Mao-Yi Lei、Jian-Ping Zou、Wei Zhang
DOI:10.1016/j.tetlet.2005.12.027
日期:2006.2
A highly efficient solvent-free and catalyst-free method for the synthesis of α-amino phosphonates is developed by a microwave-assisted three-componentKabachnik–Fieldsreaction involving aldehyde, amine, and dimethyl phosphite.
A distinct approach for high-yielding synthesis of α-amino phosphonates has been discovered through three-component reaction of nitro compounds, aldehydes, or ketones and dialkyl or trialkylphosphites using indium in dilute aqueous HCl at room temperature. This one-pot conversion consists of the following steps: (i) reduction of nitro compounds to amines, (ii) formation of imines from amines and carbonyl