Abstract
A novel method for the synthesis of quinoxalines via transition-metal-free cyclization of <i>o</i>-phenylenediamine and arylacetaldehyde in a one-pot procedure has been developed. In this process, an inorganic base (K<sub>2</sub>CO<sub>3</sub>) is the only reagent required, and it proceeds smoothly in the absence of adding transition metal catalysts. The reaction appears to be very general and suitable for the construction of a variety of quinoxalines.
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