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   https://doi.org/10.1021/ja0716103  

   Stahl, Jürgen; Mohr, Wolfgang; de Quadras, Laura; Peters, Thomas B.; Bohling, James C.; Martín-Alvarez, José Miguel; Owen, Gareth R.; Hampel, Frank; Gladysz, John A. (July 2007, Journal of the American Chemical Society)
2. Complexity-Building Photoinduced Cascade Involving C _sp² –C _sp³ Coupling of Aromatic Amides via [2 + 2] Reactivity of ESIPT-Generated o- Azaxylylenes

   https://doi.org/10.1021/acs.orglett.3c00092  

   Reddy, D. Sai; Novitskiy, Ivan M.; Kutateladze, Andrei G. (February 2023, Organic Letters)
3. DFT Case Study of the Mechanism of a Metal-Free Oxygen Atom Insertion into a p -Quinone Methide C(sp ³ )–C(sp ² ) Bond

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4. Nickel‐Catalyzed C( sp ² )−C( sp ³ ) Kumada Cross‐Coupling of Aryl Tosylates with Alkyl Grignard Reagents

   https://doi.org/10.1002/adsc.201801586  

   Piontek, Aleksandra; Ochędzan‐Siodłak, Wioletta; Bisz, Elwira; Szostak, Michal (April 2019, Advanced Synthesis & Catalysis)

   Abstract Aryl tosylates are an attractive class of electrophiles for cross‐coupling reactions due to ease of synthesis, low price, and the employment of C−O electrophiles, however, the reactivity of aryl tosylates is low. Herein, we report the Ni‐catalyzed C(sp²)−C(sp³) Kumada cross‐coupling of aryl tosylates with primary and secondary alkyl Grignard reagents. The method delivers valuable alkyl arenes by cross‐coupling with challenging alkyl organometallics possessing β‐hydrogens that are prone to β‐hydride elimination and homo‐coupling. The reaction is catalyzed by an air‐ and moisture stable‐Ni(II) precatalyst. A broad range of electronically‐varied aryl tosylates, including bis‐tosylates, underwent this transformation, and many examples are suitable at mild room temperature conditions. The combination of Ar−X cross‐coupling with the facile Ar−OH activation/cross‐coupling strategy permits for orthogonal cross‐coupling with challenging alkyl organometallics. Furthermore, we demonstrate that the method operates with TON reaching 2000, which is one of the highest turnovers observed to date in Ni‐catalyzed cross‐couplings. magnified image 

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   https://doi.org/10.1021/jacs.8b11211  

   Zhu, Feng; Miller, Eric; Zhang, Shuo-qing; Yi, Duk; O’Neill, Sloane; Hong, Xin; Walczak, Maciej A. (December 2018, Journal of the American Chemical Society)