A cascade reaction of cinnamyl azides with vinyl sulfones directly generates dihydro-pyrrolo-pyrazole heterocycles
作者:Angela S. Carlson、Alexandru M. Petre、Joseph J. Topczewski
DOI:10.1016/j.tetlet.2021.152860
日期:2021.3
direct synthesis of dihydro-pyrrolo-pyrazole heterocycles from allylic azides and methyl vinyl sulfone. The product results from a complex cascade reaction that is operationally straightforward, with aromatization being the result of a concomitant elimination step. A variety of azides could participate in this reaction (12 examples) and the isolated yields of the desired product ranged from 51%−72%
该报告描述了从烯丙基叠氮化物和甲基乙烯基砜直接合成二氢吡咯并吡唑杂环。该产品由操作简单的复杂级联反应产生,芳构化是伴随消除步骤的结果。多种叠氮化物可以参与该反应(12 个示例),所需产物的分离产率范围为 51%-72%。最后,可以通过在吡咯烷中加热产物来除去亚乙基砜基团。