Selective synthesis of some imidazopyridine-fused chromones
作者:Marta Costa、M. Fernanda Proença
DOI:10.1016/j.tet.2011.09.054
日期:2011.11
A fused heterocyclic scaffold combining the imidazo[1,2-a]pyridine with a substituted chromone was synthesized in a one-pot procedure. The reaction proceeds by intramolecular cyclization of 1-(2-imino-2H-chromen-3-yl)pyridinium chloride in ethanol and in the presence of DABCO. A detailed study of the experimental conditions allowed a clear understanding of the reaction pathway.
通过一锅法合成了结合有咪唑并[1,2- a ]吡啶和取代的色酮的稠合杂环支架。该反应通过在乙醇中和在DABCO存在下将1-(2-亚氨基-2 H-铬-3-基)吡啶鎓氯化物进行分子内环化而进行。对实验条件的详细研究可以清楚地了解反应途径。