Zinc-Chloride-Promoted Domino Reaction of Phenols with Terminal Alkynes under Solvent-Free Conditions: An Efficient Synthesis of Chromenes
作者:Chinnabattigalla Sreenivasulu、Gedu Satyanarayana
DOI:10.1002/ejoc.201800391
日期:2018.6.15
ABSTRACT: A domino one‐pot synthesis of 2H‐chromenes and 4H‐chromenes starting from phenols and terminal acetylenes under solvent‐free and atom economy conditions, is described. This annulation reaction between phenols with alkynes, is promoted by simple Lewis acid ZnCl2. Significantly, to the best of our knowledge, the synthesis of 2H‐chromenes, is first of its kind, particularly, using terminal alkyl
摘要:描述了在无溶剂和原子经济条件下,以苯酚和末端乙炔为原料,多米诺一锅法合成 2H-色烯和 4H-色烯。苯酚与炔烃之间的这种环化反应是由简单的路易斯酸 ZnCl2 促进的。值得注意的是,据我们所知,2H-色烯的合成是同类中的第一个,特别是使用末端烷基乙炔。本策略显示出广泛的底物范围和良好的官能团耐受性