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1. Radical Capture at Nickel(II) Complexes: C–C, C–N, and C–O Bond Formation

   https://doi.org/10.1021/acs.organomet.0c00021  

   Bakhoda, Abolghasem Gus; Wiese, Stefan; Greene, Christine; Figula, Bryan C.; Bertke, Jeffery A.; Warren, Timothy H. (May 2020, Organometallics)

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2. Structure and Function of NzeB, a Versatile C–C and C–N Bond-Forming Diketopiperazine Dimerase

   https://doi.org/10.1021/jacs.0c06312  

   Shende, Vikram V.; Khatri, Yogan; Newmister, Sean A.; Sanders, Jacob N.; Lindovska, Petra; Yu, Fengan; Doyon, Tyler J.; Kim, Justin; Houk, K. N.; Movassaghi, Mohammad; et al (October 2020, Journal of the American Chemical Society)

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3. α-Amino Radical-Mediated Diverse Difunctionalization of Alkenes: Construction of C–C, C–N, and C–S Bonds

   https://doi.org/10.1021/acscatal.0c04243  

   Su, Yong-Liang; Tram, Linh; Wherritt, Daniel; Arman, Hadi; Griffith, Wendell P.; Doyle, Michael P. (November 2020, ACS Catalysis)

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4. Phosphine-Directed sp ³ C–H, C–O, and C–N Borylation

   https://doi.org/10.1021/acs.joc.0c01706  

   Morris, Kelsey C.; Wright, Shawn E.; Meyer, Gillian F.; Clark, Timothy B. (November 2020, The Journal of Organic Chemistry)

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5. Aerobic C–C and C–O bond formation reactions mediated by high-valent nickel species

   https://doi.org/10.1039/c9sc03758f  

   Smith, Sofia M.; Planas, Oriol; Gómez, Laura; Rath, Nigam P.; Ribas, Xavi; Mirica, Liviu M. (November 2019, Chemical Science)

   Nickel complexes have been widely employed as catalysts in C–C and C–heteroatom bond formation reactions. While Ni(0), Ni( i ), and Ni( ii ) intermediates are most relevant in these transformations, recently Ni( iii ) and Ni( iv ) species have also been proposed to play a role in catalysis. Reported herein is the synthesis, detailed characterization, and reactivity of a series of Ni( ii ) and Ni( iii ) metallacycle complexes stabilized by tetradentate pyridinophane ligands with various N-substituents. Interestingly, while the oxidation of the Ni( ii ) complexes with various other oxidants led to exclusive C–C bond formation in very good yields, the use of O 2 or H 2 O 2 as oxidants led to formation of appreciable amounts of C–O bond formation products, especially for the Ni( ii ) complex supported by an asymmetric pyridinophane ligand containing one tosyl N-substituent. Moreover, cryo-ESI-MS studies support the formation of several high-valent Ni species as key intermediates in this uncommon Ni-mediated oxygenase-type chemistry. 

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