Synthesis of 2-Phosphonylated Imidazo[1,2-a]pyridines under Catalyst-Free Conditions
Tetrahedron Letters（2018）
Abstract
•A catalyst-free regioselective synthesis of novel 2-phosphonylated imidazo[1,2-a]pyridines was developed.•Chemoselective CN coupling of push-pull acetylenes and 2-aminopyridines.•A catalyst-free intramolecular cyclization of ynamines.
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Key words
Imidazo[1,2-a]pyridines,Heterocyclization,Phosphonylation,2-Aminopyridines,Chloroethynylphosphonate
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