The one-pot cascade reaction for the preparation of indolizine from a wide range of chalcone, pyridine and benzyl bromide via [3 + 2] cycloaddition/oxidative aromatization promoted by Cu(OAc)₂ has been developed. This convenient method don’t need to isolate the intermediates and the desired products indolizines were obtained in moderate to high yield catalyzed by Cu(OAc)₂ in the presence of oxygen.

中文翻译：

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铜催化的查耳酮，苄基溴和吡啶的一锅反应形成吲哚嗪衍生物

从大范围的查耳酮，吡啶和对氮茚的制备中的一锅级联反应的苄基溴经由[3 + 2]环加成/氧化芳构化的Cu（OAc）升为₂已经研制成功。这种方便的方法不需要分离中间体，在氧存在下，Cu（OAc）₂可以中等至高收率获得所需的吲哚类化合物。