Expeditious Assembly of Fluorenones through Domino Reactions of Benzoyl Chlorides with Arylboronic Acids Catalyzed by ONO Pincer-like Palladium(II) Complexes
A new set of palladium(II) complexes featuring ONO pincer‐type ligands were synthesized and utilized as efficient homogeneous catalysts for the domino reactions of benzoyl chlorides with arylboronicacids to yield a library of fluorenones. The titled reaction proceeded smoothly in H2O/MeOH media at a low catalyst loading (0.1 mol %) under mild reaction conditions in an open flask, and the catalyst
合成了一组新的具有ONO钳型配体的钯(II)配合物,并用作苯甲酰氯与芳基硼酸的多米诺反应的有效均相催化剂,以生成芴酮库。在开放的烧瓶中,在温和的反应条件下,在低催化剂负载量(0.1 mol%)下,在H 2 O / MeOH介质中顺利进行标题反应,该催化剂可重复使用六次。为了验证当前开发的工业级应用方法,进行了克级合成。有利地,本方案不需要任何外部氧化剂,添加剂或相转移剂。
Synthesis of Fluoren‐9‐ones via Pd‐Catalyzed Annulation of 2<i>‐</i>Iodobiphenyls with Vinylene Carbonate
作者:Wenguang Li、Yongqi Yu、Jie Yang、Kaifang Fu、Xu Zhang、Shukui Shi、Ting Li
DOI:10.1002/asia.202301040
日期:2024.2.16
A palladium-catalyzed reaction for intermolecular selective C−H cyclocarbonylation of 2-iodobiphenyls is reported, in which the vinylenecarbonate acts as a carbon monoxide transfer agent to enable the annulation reaction.
Novel procedures for the [Pd]/[Ag]/TFA system catalyzed cascade reactions of nitrile directed remote C-H and dual C-H bond activation with insertion of nitrile were developed, which afforded variously polysubstituted fluorenones in moderate to good yields with tolerance of a wide variety of substrates.
Catalytic transformation of benzoic anhydrides into fluorenones and biphenyls