The front cover picture, provided by Sung‐Gon Kim and his co‐workers, illustrates an efficient [4+3]‐annulation reaction between in situ generated azaoxyallyl cations and isatoic anhydride to afford seven‐membered 1,4‐benzodiazepinediones. This annulation involves the cascade reaction of decarboxylative addition of hexafluoroisopropanol (HFIP) to isatoic anhydride, addition to the azaoxyallyl cation generated from α‐halohydroxamate, and intramolecular substitution to yield 1,4‐benzodiazepinediones. Details of this work can be found in the full paper on pages 3594–3603 (E. Kim, C. Y. Lee, S.‐G. Kim, Adv. Synth. Catal. 2020, 362, 3594–3603; DOI: 10.1002/adsc.202000439).

中文翻译：

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封面图片：HFIP介导的[4 + 3]脱羧基与壬基酸酐的氮杂烯丙基阳离子的合成（高级合成，目录号17/2020）

所述前盖的画面，由晟坤Kim和他的同事提供，示出了一个有效的[4 + 3] -annulation原位之间产生azaoxyallyl阳离子和靛红酸酐，得到7元1,4- benzodiazepinediones反应。这种成环反应涉及级联反应：将六氟异丙醇（HFIP）脱羧加成等油酸酐，加入由α-卤代异羟肟酸酯产生的氮杂烯丙基阳离子，再进行分子内取代反应，生成1,4-苯并二氮杂二酮。这项工作的详情，可在3594-3603（E.金，李祖，S.-G.金，网页的全文中找到。进阶合成器CATAL。2020，362，3594-3603; DOI：10.1002 / ADSC .202000439）。