An Iridium(III)‐catalyzed C‐H cyclization of N‐arylphthalazinones with α‐diazotized Meldrum’s acid afforded tetracyclic phthalazine derivatives with a carbonyl group in 98% yield in only 30 min. The initial formation of tetracyclic phthalazine derivatives also provided access to a powerful building block. The utility of this method is emphasized by the synthetic transformation into a series of potentially bioactive derivatives.

中文翻译：

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Ir(III)催化N-芳基酞嗪酮脱氢C-H/N-H功能化合成酞嗪并[2,3-a]肉啉-6,8,13(5H)-三酮

铱 (III) 催化的 N-芳基二氮杂萘与 α-重氮化 Meldrum 酸的 C-H 环化反应仅在 30 分钟内就得到了带有羰基的四环二氮杂萘衍生物，收率达 98%。四环二氮杂萘衍生物的最初形成也提供了获得强大结构单元的途径。该方法的实用性通过合成转化为一系列潜在的生物活性衍生物而得到强调。