Abstract
AbstractAn interestingcyclization reactions of aryl ketones with 2‐amino aniline derivatives under SeO2 (oxidant) are described for the synthesis of benzoxazole, benzothiazole, benzimidazole and quinazolinone through the C−C cleavage of acetophenone. The reaction likely involves sequential C−N, C−O and C−S bond formation followed by C(CO)−C(alkyl) bond cleavage. Various substituted fused heterocycles are obtained in good to excellent (gram scale) yields in a single step from readily available acetophenones.
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