A Rh(III)-catalyzed C–H activation of α-keto oximes and a cyclization cascade with diazo compounds were developed to construct the highly fused indano[1,2-b]azirine frameworks in good yields with a broad range of substrates under mild reaction conditions. More intriguingly, a [4+1+1] sequential annulation cascade is demonstrated for the first time in this reaction and opened a new reaction mode for α-keto oximes. These fused indano[1,2-b]azirine derivatives could also be further transformed into intriguing privileged drug scaffolds.

中文翻译：

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Rh(III)-催化的 C-H 活化和 [4+1+1] 顺序环化级联得到高度融合的茚满并[1,2-b]氮杂环丙烷

开发了 Rh(III) 催化的 α-酮肟的 C-H 活化和与重氮化合物的环化级联反应，以良好的产率构建高度稠合的茚满并[1,2- b ] 氮杂环丙烷骨架，并具有广泛的底物范围反应条件温和。更有趣的是，在该反应中首次证明了[4+1+1]顺序环化级联反应，并为α-酮肟开辟了新的反应模式。这些融合的茚满并[1,2- b ]氮丙啶衍生物也可以进一步转化为有趣的特权药物支架。