Characterization of Catalyst: Comparison of BrØnsted and Lewis Acidic Power in Boron Sulfonic Acid as a Heterogeneous Catalyst in Green Synthesis of Quinoxaline Derivatives
Journal: Chemical Methodologies (Vol.3, No. 2)Publication Date: 2019-03-01
Authors : Sami Sajjadifar; Kaushik Pal; Hadi Jabbari; Omidali Pouralimardan; Faten Divsar; Sarvin Mohammadi-Aghdam; Issa Amini; Hoda Hamidi;
Page : 226-236
Keywords : Quinoxaline; Boron Sulfonic Acid; Trimethyl borate; Triisopropyl borate; SBSA; STMB; STIPB;
Abstract
A simple, highly efficient and green procedure for the condensation of aryl and alkyl 1,2-diamines with α-diketones in the presence of catalytic amount of boron sulfonic acid (BSA) and silica trimethyl borat (STMB) and silica triisopropyl borate (STIPB), as two novel heterogeneous Lewis acid catalysts at room temperature, is described. In this method, we proved that the BrØnsted acidic power of boron sulfonic acid (BSA) is more important than its Lewis acidity. Using this method, quinoxaline derivatives as biologically interesting compounds are produced in high to excellent yields.
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Last modified: 2019-01-15 17:44:23