Neighbouring Formyl Group Assisted Oxidation of o-Alkynylarenecarbaldehydes by an Iodine/Water System
作者:Karuppusamy Sakthivel、Kannupal Srinivasan
DOI:10.1002/ejoc.201001746
日期:2011.5
The oxidation of o-alkynylarenecarbaldehydes into tricarbonyl compounds by an iodine/watersystem is described. The reaction takes place via isochromenol intermediates formed by intramolecular assistance of the formylgroup. The procedure was applied to various o-alkynylarenecarbaldehydes to afford the corresponding products in good to excellent yields.
Iodine/Water-Mediated Oxidation of<i>o</i>-Alkynylaroyl Compounds and Application of the Products of Oxidation in the Synthesis of Nitrogen Heterocycles
作者:Karuppusamy Sakthivel、Kannupal Srinivasan
DOI:10.1002/ejoc.201300046
日期:2013.6
facile iodine/water-mediated oxidation of the triple bond of o-alkynylaroyl compounds to furnish tricarbonyl compounds is reported. The reaction proceeds through the formation of isochromenol intermediates by the assistance of the neighbouring aroyl group. The product tricarbonyl compounds are versatile synthetic precursors that, upon treatment with mono- and diamines, hydrazines and amino alcohols, afford