Sterically enhanced 2‐iminopyridylpalladium chlorides as recyclable ppm‐palladium catalyst for Suzuki–Miyaura coupling in aqueous solution
作者:Wenhua Lin、Liping Zhang、Yanping Ma、Tongling Liang、Wen‐Hua Sun
DOI:10.1002/aoc.6474
日期:2022.1
2-iminopyridine derivatives and their palladium chlorides complexes are designed and prepared, which efficiently promote the Suzuki–Miyauracoupling (SMC) reaction in aqueous solution. Besides the good to excellent yields and broad substrate scope, these catalysts can be reused for at least four new batches of the substrates. Spontaneous separation of coupling products in the aqueous reaction medium is
From the grafting of NHC-based Pd(II) complexes onto TiO2 to the in situ generation of Mott-Schottky heterojunctions: The boosting effect in the Suzuki-Miyaura reaction. Do the evolved Pd NPs act as reservoirs?
作者:Jonathan De Tovar、Franck Rataboul、Laurent Djakovitch
DOI:10.1016/j.jcat.2021.04.016
日期:2021.6
synthesized for immobilization at the surface of TiO2. The studies reveal that once the complexes are anchored onto TiO2, the mechanism governing the catalytic reaction is different from that observed for the non-anchored complexes. All complexes evolved to Pd NPs at the surface of TiO2 under reaction conditions and released Pd species in the liquid phase. Also, this reactivity was boosted by the in situ generation
An easily prepared palladium-hydrogel nanocomposite catalyst for C–C coupling reactions
作者:Mitasree Maity、Uday Maitra
DOI:10.1039/c4ta04200j
日期:——
Palladium nanoparticles were efficiently prepared in situ by sodium cyanoborohydride reduction of Pd(ii) at room temperature using calcium-cholate hydrogel fibers as templates. The PdNPs self-organize on the gel fibers, which supports the controlled growth as well as stabilization of PdNPs. The hybrid xerogel was used as an efficient catalyst for the Suzuki coupling reaction in water.
pyrene and pyridine. Catalytic role of ferrocene in aryl radicalformation was studied by cyclic voltammetry of phenyldiazonium tetrafluoroborate. In presence of ferrocene more radicalformation was observed. This reaction model works at ambient temperature and features the use of inexpensive catalyst for the synthesis of biaryl derivatives.
作者:Qianwei Chen、Shufeng Wu、Shuqin Yan、Chengxi Li、Hayrul Abduhulam、Yanhui Shi、Yanfeng Dang、Changsheng Cao
DOI:10.1021/acscatal.0c01462
日期:2020.8.7
electrophilic coupling partners for the Suzuki–Miyaura reaction via C–S bond cleavage was successfully developed under palladium-N-heterocyclic carbene catalysis. The reactions showed good functional group compatibility, proceeded well under mild conditions, and provided biaryls in yields of up to 96%. A wide range of useful functional groups, such as fluoro, chloro, ether, hydroxyl, amide, cyano, keto