A direct and site-specific alkylation of (sp)C-H bond with aliphatic boronic acid was achieved. By simply heating glycinates and amines together with alkylboronic acids under an oxygen atmosphere, a variety of unnatural α-amino acids and peptides could be obtained in good yields.
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http://dx.doi.org/10.1021/acs.orglett.1c00948 | DOI Listing |
J Am Chem Soc
December 2024
College of Materials, Institute of Artificial Intelligence, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, iChEM, Fujian Key Laboratory of Advanced Materials, College of Energy, Xiamen University, Xiamen 361005, China.
Nickel-iron-based catalysts are recognized for their high efficiency in the oxygen evolution reaction (OER) under alkaline conditions, yet the underlying mechanisms that drive their superior performance remain unclear. Herein, we revealed the molecular OER mechanism and the structure-intermediate-performance relationship of OER on a phosphorus-doped nickel-iron nanocatalyst (NiFeP). NiFeP exhibited exceptional activity and stability with an overpotential of only 210 mV at 10 mA cm in 1 M KOH and a cell voltage of 1.
View Article and Find Full Text PDFOrg Lett
December 2024
Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang 318000, China.
We developed a molecular-oxygen-mediated multicomponent oxidative cyclization strategy to synthesize -heterocycles containing tertiary alcohol units via the formation of key C-OH bonds and quaternary carbon centers. This formal [3 + 2 + 1] annulation offers a green and sustainable alternative for the C-OH bond formation, using O as both the oxidant and oxygen source under metal- and catalyst-free conditions. Notably, continuous [1,5]-hydrogen transfer together with excess alcohols promotes the formation of C-OH-bearing products.
View Article and Find Full Text PDFChem Sci
October 2024
KAUST Catalysis Center, KCC, King Abdullah University of Science and Technology, KAUST Thuwal 23955-6900 Saudi Arabia
Photocatalytic molecular oxygen activation has emerged as a valuable tool for organic synthesis, environmental remediation and energy conversion. Most reported instances have relied on high-energy light sources. Herein, 9-fluorenone-functionalized porous organic polymers (POPs) were reported to enable red-light-excited photocatalysis for the organic oxygenation reaction.
View Article and Find Full Text PDFNat Commun
October 2024
Beijing National Laboratory for Molecular Sciences, CAS Laboratory of Colloid and Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Center for Carbon Neutral Chemistry, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, China.
Nitrogen oxides (NO) play important roles in the nitrogen cycle system and serve as renewable nitrogen sources for the synthesis of value-added chemicals driven by clean electricity. However, it is challenging to achieve selective conversion of NO to multi-nitrogen products (e.g.
View Article and Find Full Text PDFJ Biol Chem
November 2024
Department of Chemistry and Biochemistry the University of California Santa Barbara, Santa Barbara, California, USA; Biomolecular Science and Engineering Program, The University of California Santa Barbara, Santa Barbara, California, USA. Electronic address:
Genetically encoded photoactive proteins are integral tools in modern biochemical and molecular biological research. Within this tool box, truncated variants of the phototropin two light-oxygen-voltage flavoprotein have been developed to photochemically generate singlet oxygen (O) in vitro and in vivo, yet the effect of O on these genetically encoded photosensitizers remains underexplored. In this study, we demonstrate that the "improved" light-oxygen-voltage flavoprotein is capable of photochemical O generation.
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