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1. Reactivity of a Pd(I)−Pd(I) Dimer with O 2 : Monohapto Pd Superoxide and Dipalladium Peroxide in Equilibrium

   https://doi.org/10.1021/ja200346a  

   Huacuja, Rafael ; Graham, Daniel J. ; Fafard, Claudia M. ; Chen, Chun-Hsing ; Foxman, Bruce M. ; Herbert, David E. ; Alliger, Glen ; Thomas, Christine M. ; Ozerov, Oleg V. ( March 2011 , Journal of the American Chemical Society)
2. Antigen-Presenting Cell-Intrinsic PD-1 Neutralizes PD-L1 in cis to Attenuate PD-1 Signaling in T Cells

   https://doi.org/10.1016/j.celrep.2018.06.054  

   Zhao, Yunlong ; Harrison, Devin L. ; Song, Yuran ; Ji, Jie ; Huang, Jun ; Hui, Enfu ( July 2018 , Cell Reports)
3. Aqueous Synthesis of Pd–M (M = Pd, Pt, and Au) Decahedra with Concave Facets for Catalytic Applications

   https://doi.org/10.1007/s11244-020-01235-w  

   Huang, Hongwen ; Chen, Ruhui ; Liu, Maochang ; Wang, Jinguo ; Kim, Moon J. ; Ye, Zhizhen ; Xia, Younan ( February 2020 , Topics in Catalysis)
4. N-Acyl-5,5-Dimethylhydantoins: Mild Acyl-Transfer Reagents for the Synthesis of Ketones using Pd–PEPPSI or Pd/Phosphine Catalysis

   https://doi.org/10.1021/acs.oprd.0c00054  

   Wang, Chang-An ; Liu, Chengwei ; Szostak, Michal ( April 2020 , Organic Process Research & Development)

   N-Acyl-hydantoins have emerged as novel acyl transfer reagents for the synthesis of ketones via selective N–C(O) cleavage. Herein, we report two new protocols for the cross-coupling of N-acyl-5,5-dimethylhydantoins using versatile and readily accessible Pd–PEPPSI or Pd/phosphine catalysts. The acyl Suzuki reactions afford biaryl ketones in good to excellent yields under operationally-simple conditions using commercially-available, bench- and air-stable twisted N-acyl-hydantoins as acyl donors. The method complements and expands on the previous protocol for the cross-coupling of N-acyl-hydantoins (Org. Process Res. Dev. 2018, 22, 1188). 

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5. Indication of Pd–C or Cu–C Intermediates in Bimetallic Nanoclusters During Pd/Au-PVP- or Cu/Au-PVP-Catalyzed Oxidations of endo-4-Oxatricyclo[5.2.1.02,6]-8-decene and Tetrahydro-γ-carbolines

   https://doi.org/10.1055/a-2001-6888  

   Morita, Shunya ; Ren, Zhaoyang ; Gorla, Lingaraju ; Tong, Zongbo ; Edouarzin, Edruce ; Averkiev, Boris ; Day, Victor W. ; Hua, Duy H. ( March 2023 , Synthesis)

   Catalytic oxidation of tricyclic endo-norbornene-fused tetrahydrofuran with the bimetallic nanocluster Cu/Au-PVP in the presence of H2O2 or t-BuOOH as the oxidant leads to C–H bond oxidation adjacent to the ether function to give 4-oxa-tricyclo[5.2.1.0]-8,9-exo-epoxydecane, however, oxidation with Pd/Au-PVP takes place at the C=C double bond to give the same epoxide and the oxidative three-bond forming dimeric product, dodecahydro-1,4:6,9-dimethanodibenzofurano[2,3-b:7,8-b′]bisoxolane. Formation of the latter product suggests the involvement of a reactive Pd–C intermediate. Similarly, oxidative C–C bond-forming reactions are observed in cycloaddition reactions of N2-Boc-1,2,3,4-tetrahydro-γ-carbolines and 2,3-dihydroxybenzoic acid with Cu/Au-PVP (2–5 mol%) and H2O2 at 25 °C, providing two-bond-forming [4+2] cycloadducts. Under similar reaction conditions, Pd/Au-PVP did not produce the corresponding cycloadduct, indicating a need for complexation between Cu and the carboxylic acid group of 2,3-dihydroxybenzoic acid and the allylic amine function of the γ-carbolines during the cyclization reaction. The reported intermolecular coupling reactions using Pd/Au-PVP or Cu/Au-PVP nanocluster catalysts under oxidative conditions at 25 °C are unprecedented.

    

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