A series of 2,4,6-triarylpyridines have been prepared by the one-pot reaction of aldehydes with aromatic ketones in the presence of ammonium acetate undermicrowaveirradiation without catalyst. This method has the advantage of easier workup, shorter reaction time, higher yield, and environment-friendly.
Kröhnke reaction in aqueous media: one-pot clean synthesis of 4′-aryl-2,2′:6′,2″-terpyridines
作者:Shujiang Tu、Runhong Jia、Bo Jiang、Junyong Zhang、Yan Zhang、Changsheng Yao、Shunjun Ji
DOI:10.1016/j.tet.2006.10.069
日期:2007.1
A clean aqueous Krohnke reaction process has been accomplished via a one-pot procedure of 2-acetylpyridine with aromatic aldehyde and ammonium acetate under microwave irradiation or conventional heating conditions. This method is convenient, economic and environmental friendly. (c) 2006 Elsevier Ltd. All rights reserved.
Efficient Synthesis of Polysubstituted Pyridine under Solvent‐free Conditions without Using Any Catalysts
Abstract A convenient and environmentally friendly solvent‐free procedure has been developed for the synthesis of polysubsituted pyridine derivatives. Compared with the classical reaction condition, this new synthetic method has the advantage of excellent yields, easy setup, and mild reaction conditions.