Abstract
Abstract2‐Amino‐3‐(het)aryl‐quinoxalines were synthesized by the cyclization reaction between 2‐oxo‐ethanimidothioates and o‐phenylenediamine in the presence of acid catalyst p‐TSA in toluene at 80 °C. The products were obtained in 58–84 % yields. The required substrates 2‐oxo‐ethanimidothioates were synthesized by the condensation reaction between α‐oxodithioester and amine in the presence of sodium hydride in DMF followed treatment with methyl iodide.
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