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Mild, Selective Sulfoxidation with Molybdenum(VI) cis-Dioxo Catalysts

Kelsey E. Cantwell†, Phillip E. Fanwick, and Mahdi M. Abu-Omar*†  Department of Chemistry,  Purdue University , 560 Oval Drive, West Lafayette, Indiana 47907,  United States ACS Omega , 2017,  2  (5), pp 1778–1785 DOI:  10.1021/acsomega.7b00292 Publication Date (Web): May 4, 2017 Copyright © 2017 American Chemical Society http://pubs.acs.org/doi/abs/10.1021/acsomega.7b00292 モリブデンジオキソ錯体を用いて触媒的スルホキシド化を行っています。 モリブデンジオキソ錯体は酸素原子移動反応について着目されており、エポキシ化やスルホキシド化反応に用いられています。 今回報告された錯体は高い触媒安定性や反応選択性を目標に設計されており、実用性で優れており論文になっていると感じました。 具体的には ・様々な基質で効率的にスルホキシド化が進行する ・分子中に反応性のある塩素部位などが存在しても、選択的にスルホキシド化が進行する ・水や過酸化水素に耐えうるため環境負荷が小さい 実際にサルファーマスタード類縁体の酸化反応においてmCPBAなどの代わりに用いることも可能だそうです。 伊東研の触媒反応についても、実用性に意味を持たせる際は参考になると考えました。

A Model for the Active-Site Formation Process in DMSO Reductase Family Molybdenum Enzymes Involving Oxido−Alcoholato and Oxido−Thiolato Molybdenum(VI) Core Structures

Hideki Sugimoto * † ,  Masanori Sato † ,  Kaori Asano ‡ ,  Takeyuki Suzuki ‡ ,  Kaoru Mieda § ,  Takashi Ogura § ,  Takashi Matsumoto ⊥ ,  Logan J. Giles ∥ ,  Amrit Pokhrel ∥ ,  Martin L. Kirk * ∥ , and  Shinobu Itoh * † †  Department of Material and Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering,  Osaka University , 2-1 Yamadaoka, Suita, Osaka 565-0871,  Japan ‡  Comprehensive Analysis Center, The Institute of Scientific and Industrial Research (ISIR),  Osaka University , 8-1 Mihogaoka, Ibaraki, Osaka 567-0057,  Japan §  Picobiology Institute, Graduate School of Life Science,  University of Hyogo, RSC-UH Leading Program Center , 1-1-1 Koto, Sayo-cho, Sayo-gun, Hyogo 678-0057,  Japan ⊥   Rigaku Corporation , Akishima, Tokyo 196-8666,  Japan ∥  Department of Chemistry and Chemical Biology,  The University of New Mexi...

Templated C–C and C–N Bond Formation Facilitated by a Molybdenum(VI) Metal Center

Niklas Zwettler ,  Antoine Dupé ,  Jörg A. Schachner ,  Ferdinand Belaj , and  Nadia C. Mösch-Zanetti * Institute of Chemistry, Inorganic Chemistry,  University of Graz , Schubertstrasse 1, 8010 Graz,  Austria Inorg. Chem. , Article ASAP DOI:  10.1021/acs.inorgchem.5b02347 Publication Date (Web): December 8, 2015 Copyright © 2015 American Chemical Society *E-mail:  nadia.moesch@uni-graz.at . Synopsis Reaction of bidentate iminophenolate ligands employing amide functionalities with a [MoO 2 ] 2+  source results in the formation of mononuclear dioxidomolybdenum(VI) complexes, coordinated by tetradentate C−C coupled adduct or imidazolidine ligand frameworks arising from unprecedented metal mediated C−C bond formation and subsequent cyclization via C−N bond formation. http://pubs.acs.org/doi/10.1021/acs.inorgchem.5b02347 Abstract Preparation of molybdenum dioxido complexes with novel iminophenolate ligan...

Activation of molecular oxygen by a molybdenum complex for catalytic oxidation

Antoine Dupé,a   Martina E. Judmaier,a   Ferdinand Belaj,a   Klaus Zanggerb and    Nadia C. Mösch-Zanetti*a a and b: University of Graz, Austria Dalton Trans . 2015 , Advance Article DOI: 10.1039/C5DT02931G A sterically demanding molybdenum(VI) dioxo complex was found to catalytically activate molecular oxygen and to transfer its oxygen atoms to phosphines. Intermediate peroxo as well as reduced mono-oxo complexes were isolated and fully characterized. Monomeric Mo(IV) monooxo species proved to be of an unusual nature with the coordinated phosphine trans to the oxo group. The reduced molybdenum centers can activate O2 to form a stable Mo(VI) oxo–peroxo complex unambiguously characterized by single crystal X-ray diffraction analysis. NMR experiments demonstrate that both oxygen atoms of the peroxo unit are transferred to an accepting substrate, generating the Mo(IV) intermediate and restarting the catalytic cycle. 酸素を酸化剤として、トリメチルホスフィン(かなり酸化されやすい)を触媒的に...

Periplasmic Nitrate Reductase and Formate Dehydrogenase: Similar Molecular Architectures with Very Different Enzymatic Activities

Accounts of Chemical Research  by Nuno M. F. S. A. Cerqueira, Pablo J. Gonzalez, Pedro. A. Fernandes, José J. G. Moura and Maria João Ramos  Accounts of Chemical Research DOI: 10.1021/acs.accounts.5b00333 Visit Website