A greener approach for the synthesis of various functionalized biaryl frameworks in good to excellent yield through palladium-catalyzed denitrogenative cross-coupling of aryl halides with arylhydrazines under mild reaction conditions was developed. Catalytic system is free from the aid of expensive ligands and external oxidants. Biogenically prepared palladium nanoparticles (Pd NPs) immobilized cellulose based dip catalyst displayed excellent reactivity and selectivity toward the synthesis of a broad array of symmetrical and unsymmetrical biaryls through C–N bond cleavage in air as green oxidant. In addition, recyclability in denitrogenative cross-coupling reaction was also studied which showed excellent recycling performance and the dip catalyst remained stable even after several reuses. Thus, our newly developed strategy was successfully applied for constructing wide-ranging functional groups tolerated biaryls using arylhydrazines and aryl halides as coupling partners which is most useful for practical applications in synthetic chemistry.

中文翻译：

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钯催化的芳基卤化物与芳基肼在温和反应条件下的脱氮交叉偶联

通过钯催化的芳基卤化物与芳基肼在温和反应条件下的脱氮交叉偶联，开发了一种更环保的合成各种官能化联芳基骨架的方法，收率良好。催化系统无需昂贵的配体和外部氧化剂的帮助。生物制备的钯纳米颗粒 (Pd NPs) 固定化纤维素基浸渍催化剂显示出优异的反应性和选择性，通过在空气中作为绿色氧化剂通过 C-N 键断裂合成广泛的对称和不对称联芳基化合物。此外，还研究了脱氮交叉偶联反应的可回收性，显示出优异的回收性能，即使多次重复使用后浸渍催化剂仍保持稳定。因此，