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N-Heterocycle-coordinated -iodanes as IBX alternatives for alcohol oxidations.
Chem Commun (Camb)
January 2025
Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634050, Russian Federation.
We report the synthesis of novel N-coordinated -iodanes as a unique class of hypervalent iodine compounds. X-ray diffraction analysis revealed their intriguing (pseudo)cyclic structure, showcasing distinctive N⋯I-secondary bonding interactions. We demonstrate the generation of reactive diacetoxy derivatives, which exhibits remarkable efficacy in alcohol oxidation reactions.
View Article and Find Full Text PDFStereoelectronic Tuning of Bioinspired Nonheme Iron(IV)-Oxo Species by Amide Groups in Primary and Secondary Coordination Spheres for Selective Oxygenation Reactions.
Inorg Chem
November 2024
School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, Jadavpur 700032, India.
Two mononuclear iron(II) complexes, [(6-amide-BPMEN)Fe](OTf) () and [(6-amide-Me-BPMEN)Fe(OTf)](OTf) (), supported by two BPMEN-derived (BPMEN = ,-dimethyl-,-bis(pyridine-2-yl-methyl)ethane-1,2-diamine) ligands bearing one or two amide functionalities have been isolated to study their reactivity in the oxygenation of C-H and C═C bonds using isopropyl 2-iodoxybenzoate (Pr-IBX ester) as the oxidant. Both and contain six-coordinate high-spin iron(II) centers in the solid state and in solution. The 6-amide-BPMEN ligand stabilizes an = 1 iron(IV)-oxo intermediate, [(6-amide-BPMEN)Fe(O)] ().
View Article and Find Full Text PDFChemoselective one-pot cleavage and oxidation of silyl ethers to corresponding carbonyl compounds using IBX and acid catalysts.
Org Biomol Chem
July 2024
Department of Synthetic Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan.
Herein, we describe the chemoselective one-pot cleavage and oxidation of silyl ethers using catalytic amount of TsOH·HO and IBX in DMSO. The oxidation of primary alkyl TBS ethers afforded the corresponding aldehydes in 51-94% yields, in the presence of aryl TBS, MOM, and PMB ethers, as well as -Boc and acetonide groups. Secondary benzyl TBS ethers bearing aryl TBS ethers were also oxidized to ketones in moderate yields.
View Article and Find Full Text PDFIbrexafungerp: A narrative overview.
Curr Res Microb Sci
May 2024
Division of Infectious Diseases, American University of Beirut Medical Center, Beirut, Lebanon.
Ibrexafungerp (IBX) is a new antifungal drug that recently entered the antifungal landscape. It disrupts fungal cell wall synthesis by non-competitive inhibition of the β-(1,3)-D-glucan (BDG) synthase enzyme. It has demonstrated activity against a range of pathogens including and spp.
View Article and Find Full Text PDFNonheme Fe═O Complexes Supported by Four Pentadentate Ligands: Reactivity toward H- and O- Atom Transfer Processes.
Inorg Chem
November 2023
Chemical Physics, Department of Chemistry, Lund University, Box 124, Lund SE-221 00, Sweden.
Four new pentadentate N5-donor ligands, [-(1-methyl-2-imidazolyl)methyl--(2-pyridyl)-methyl--(bis-2-pyridylmethyl)-amine] (), [-bis(1-methyl-2-imidazolyl)methyl--(bis-2-pyridylmethyl)amine] (), (-(isoquinolin-3-ylmethyl)-1,1-di(pyridin-2-yl)--(pyridin-2-ylmethyl)methanamine (), and ,-bis(isoquinolin-3-ylmethyl)-1,1-di(pyridin-2-yl)methanamine (), have been synthesized based on the N4Py ligand framework, where one or two pyridyl arms of the N4Py parent are replaced by (-methyl)imidazolyl or -(isoquinolin-3-ylmethyl) moieties. Using these four pentadentate ligands, the mononuclear complexes [Fe(CHCN)()] (), [Fe(CHCN)()] (), [Fe(CHCN)()] (), and [Fe(CHCN)()] () have been synthesized and characterized. The half-wave potentials () of the complexes become more positive in the order: < < ≤ ≤ [Fe(N4Py)(CHCN)].
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