Recent years have witnessed breakthroughs in the study of zigzag hydrocarbon belts. However, the synthesis of heterocycle-containing zigzag molecular belts remains very rare and challenging despite their interesting structures and potential applications in chemistry and materials science. Here, we report the expeditious construction of a highly strained belt[4]arene[4](1,4-dihydropyridine) structure using the fjords-stitching strategy. The synthesis comprised four-fold abnormal m-bromination of four N-pivaloylaniline units and Pd₂(dba)₃/4-Me₂NC₆H₄P^tBu₂-catalyzed intramolecular C–N bond-forming reactions. Subsequent functionalization through N-arylations produced a variety of tetraza-embedded octahydrobelt[8]arenes. Further oxidation of p-methoxyphenyl-substituted belt[4]arene[4](1,4-dihydropyridine) with Ag[Al(O^tBu^F)₄] yielded a singlet diradical dication N-doped zigzag belt.

近年来，锯齿形油气带研究取得突破。然而，尽管含杂环的锯齿形分子带具有有趣的结构和在化学和材料科学中的潜在应用，但其合成仍然非常罕见且具有挑战性。在这里，我们报告了使用峡湾缝合策略快速构建高应变带 [4] 芳烃 [4](1,4-二氢吡啶) 结构。该合成包括四个N-新戊酰苯胺单元和Pd ₂ (dba) ₃ /4-Me ₂ NC ₆ H ₄ P ^t Bu _{2的四倍异常}间溴化催化的分子内 C-N 键形成反应。随后通过N-芳基化进行的功能化产生了多种嵌入四氮杂的八氢带 [8] 芳烃。对-甲氧基苯基取代的带[4]芳烃[4](1,4-二氢吡啶)与Ag[Al(O ^t Bu ^F ) ₄ ]的进一步氧化产生单线态双自由基N掺杂的锯齿带。