An efficient base-mediated intramolecular condensation of 2-(disubstituted amino)-benzonitriles to 3-aminoindoles
摘要:
A concise and versatile method for the preparation of 3-aminoindoles from 2-(disubstituted amino)-benzonitriles is described, and in situ functionalizations were illustrated. (C) 2008 Elsevier Ltd. All rights reserved.
An expeditious N,N-dibenzylation of anilines under ultrasonic irradiation conditions using low loading Cu(II)-clay heterogeneous catalyst
摘要:
A simple one-pot procedure for the direct N,N-dibenzylation of anilines using a catalytic amount of Cu modified montmorillonite-KSF is described. Cu modified montmorillonite-KSF has been proven to be a simple, efficient, mild, convenient, and effective catalyst for the selective benzylation of anilines with benzyl bromide. Cu loading plays a significant role in product yield and solvents were found to control the selectivity. The catalyst is easy to prepare, heterogeneous, stable, and easy to recover. (C) 2014 Elsevier Ltd. All rights reserved.