Hydrophosphorylation of Imines
Catalyzed by Tosyl Chloride for the Synthesis of α-Aminophosphonates
作者:Babak Kaboudin、Elaheh Jafari
DOI:10.1055/s-2008-1078509
日期:——
A simple, efficient, and general method has been developed for the synthesis of α-aminophosphonic esters using TsCl as an efficient catalyst. α-Aminophosphonic acids were obtained in good to high yields (65-85%) and purity under mild conditions by the reaction of diethyl phosphite with imines in the presence of TsCl.
Efficient One-Pot Formation of Substituted γ-Amino Acids
作者:Mardia T. El-Sayed、Muhammad Abbas、Andreas Hilgeroth
DOI:10.2174/157017811795685081
日期:2011.6.1
A series of novel substituted γ-amino acids has been catalytically prepared by a one-pot reaction of substituted imines and homoenolates. The efficiency of the novel direct route has been found to depend on the nature of amine being either aliphatic or aromatic. Additionally, the influence of aromatic substituents has been investigated.
Cerium(III)-Catalyzed Synthesis of Schiff Bases: A Green Approach
作者:Lakshmy Ravishankar、Siddhartha A. Patwe、Nehal Gosarani、Aparajita Roy
DOI:10.1080/00397910903370725
日期:2010.9.30
The reaction of primary aromatic amines with aryl aldehydes is found to be catalyzed by cerium chloride heptahydrate under solvent-free conditions to give the corresponding Schiff bases in good yields.
Grinding Synthesis of Schiff Bases Combined with Infrared Irradiation
作者:Jian-Ying Tong、Na-Bo Sun、Hong-Ke Wu
DOI:10.14233/ajchem.2013.14382
日期:——
Solid-phase synthesis combined with infrared irradiation promoted the formation of a series of Schiff bases in the condensation reaction between substituted benzaldehydes and anilines, in the solvent free. Benzaldehydes and anilines, containing either electron withdrawing or electron-releasing groups, were evaluated their substituent effect on the formation of the Schiff bases. Moreover, this new procedure is environmentally benign because no solvent was employed in the transformations.
REGIOSELECTIVE SYNTHESIS OF 1,2-DIARYLBENZAZETIDENES VIA [2 + 2] CYCLOADDITION REACTIONS OF BENZYNE WITH AZOMETHINES
作者:Kewal Krishan Singal、Jaswinder Kaur
DOI:10.1081/scc-100105330
日期:2001.1
[2 + 2] Cycloadditionreactions of benzyne generated in situ with various substituted azomethines have been carried out leading to the synthesis of 1,2-diarylbenzazetidenes in good yields with a high degree of regioselectivity.