Itoh Group Literature Review

Michiel Langerman and Dennis G. H. Hetterscheid* Angew. Chem. Int. Ed. 2019 First published: 24 July 2019 https://doi.org/10.1002/anie.201904075 酸素と銅錯体の反応性の化学は、Cu(TMPA)錯体から大きく展開したといっても過言では無いと思います。 この錯体を用いると、触媒的に酸素が還元できることは知られていました。 この論文では、触媒回転頻度（TOF）をきちんと評価したところ、これまでで最も大きい値である10万回/秒に達したと報告しています。 過電圧が0.5 V程度必要である点、酸素はほとんど4電子還元されて水になる点などは、知られているとおりです。 かれらはRing Rotating Disc Electrode を使って、もうちょっと真面目にこの辺も研究していて、過電圧が小さくなり、錯体濃度が低くなると、過酸化水素が結構出るぞ、と報告しています。

Vincent C.-C. Wang † ‡ ,  Suman Maji ‡ § ,  Peter P.-Y. Chen ∥ ,  Hung Kay Lee ⊥ ,  Steve S.-F. Yu † , and  Sunney I. Chan * † # ○     †  Institute of Chemistry,  Academia Sinica , 128, Section 2, Academia Road, Nankang, Taipei 11529,  Taiwan §  School of Chemical Engineering and Physical Sciences,  Lovely Professional University , Jalandhar-Delhi G. T. Road (NH-1), Phagwara, Punjab  India  144411 ∥  Department of Chemistry,  National Chung Hsing University , 250 Kuo Kuang Road, Taichung 402,  Taiwan ⊥  Department of Chemistry,  The Chinese University of Hong Kong , Shatin, New Territories,  Hong Kong #  Department of Chemistry,  National Taiwan University , No. 1, Section 4, Roosevelt Road, Taipei 10617,  Taiwan ○  Noyes Laboratory, 127-72,  California Institute of Technology , 1200 East California Boulevard, Pasadena, California 91125,  United...

Isaac Garcia-Bosch * † ,  Ryan E. Cowley ‡ ,  Daniel E. Díaz § ,  Ryan L. Peterson § ,  Edward I. Solomon * ‡ , and  Kenneth D. Karlin * §   †  Department of Chemistry,  Southern Methodist University , Dallas, Texas 75275,  United States ‡  Department of Chemistry,  Stanford University , Stanford, California 94305,  United States §   Johns Hopkins University , Baltimore, Maryland 21218,  United States J. Am. Chem. Soc. , Article ASAP DOI:  10.1021/jacs.6b12990 Publication Date (Web): February 14, 2017 Copyright © 2017 American Chemical Society * igarciabosch@smu.edu , * edward.solomon@stanford.edu , * karlin@jhu.edu Copper-dependent metalloenzymes are widespread throughout metabolic pathways, coupling the reduction of O 2  with the oxidation of organic substrates. Small-molecule synthetic analogs are useful platforms to generate L/Cu/O 2  species that reproduce the structura...

Susan L. Zultanski, Jingyi Zhao, and Shannon S. Stahl* University of Wisconsin, United States J. Am. Chem. Soc., 2016, 138 (20), pp 6416–6419 DOI: 10.1021/jacs.6b03931 Publication Date (Web): May 12, 2016 Abstract A modular Cu/ABNO catalyst system has been identified that enables efficient aerobic oxidative coupling of alcohols and amines to amides. All four permutations of benzylic/aliphatic alcohols and primary/secondary amines are viable in this reaction, enabling broad access to secondary and tertiary amides. The reactions exhibit excellent functional group compatibility and are complete within 30 min–3 h at rt. All components of the catalyst system are commercially available. Transition state of alcohol oxidation by Cu complex and nitroxyl radical cf. Mechanism of Copper(I)/TEMPO-Catalyzed Aerobic Alcohol Oxidation Shannon S. Stahl and co-workers J. Am. Chem. Soc.   2013 , 135 , 2357 DOI: 10.1021/ja3117203

Colin W. Anson†, Soumya Ghosh‡, Sharon Hammes-Schiffer*‡, and Shannon S. Stahl*† † University of Wisconsin—Madison, Wisconsin, United States ‡ Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois, United States J. Am. Chem. Soc., 2016, 138 (12), pp 4186–4193 DOI: 10.1021/jacs.6b00254 Publication Date (Web): February 29, 2016 Copyright © 2016 American Chemical Society Abstract Macrocyclic metal complexes and  p -benzoquinones are commonly used as co-catalytic redox mediators in aerobic oxidation reactions. In an effort to gain insight into the mechanism and energetic efficiency of these reactions, we investigated Co(salophen)-catalyzed aerobic oxidation of  p -hydroquinone. Kinetic and spectroscopic data suggest that the catalyst resting-state consists of an equilibrium between a Co II (salophen) complex, a Co III -superoxide adduct, and a hydrogen-bonded adduct between the hydroquinone and the Co III –O 2  species. The kin...

Amanda R. Corcos, † Omar Villanueva, ‡ , ∇ Richard C. Walroth, § Savita K. Sharma, ‡ John Bacsa, ‡ Kyle M. Lancaster, * , § Cora E. MacBeth, * , ‡ and John F. Berry * , †   † Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave., Madison, Wisconsin 53706, United States ‡ Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States § Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States J. Am. Chem. Soc. , Article ASAP DOI: 10.1021/jacs.5b12643 Publication Date (Web): January 22, 2016   http://pubs.acs.org/doi/abs/10.1021/jacs.5b12643 http://pubs.acs.org/doi/pdf/10.1021/jacs.5b12643 ABSTRACT: Bimetallic (Et 4 N) 2 [Co 2 (L) 2 ], (Et 4 N) 2 [ 1 ] (where (L) 3 − = (N( o -PhNC(O) i Pr) 2 ) 3 − ) reacts with 2 equiv of O 2 to form the monometallic species (Et 4 N)- [Co(L)O 2 ], (Et 4 N)[ 3 ]. A crystallographically character- ize...

M. Sc. Bernd Mühldorf, Prof. Dr. Robert Wolf First published:  10 November 2015 Full publication history DOI:  10.1002/anie.201507170 View/save citation Cited by:  0  articles  Check for new citations Funding Information Abstract A mixture of the photocatalyst riboflavin tetraacetate (RFT) and the biomimetic non-heme iron complex [Fe(TPA)(MeCN) 2 ](ClO 4 ) 2  (TPA=tris(2-pyridylmethyl)amine) efficiently catalyzes the visible-light-driven aerobic oxidation of alkyl benzenes to ketones and carboxylic acids. An RFT-catalyzed photocycle and the independent action of the iron complex as a catalyst for H 2 O 2  disproportionation and alkyl benzene oxygenation ensure high yields and selectivities. http://onlinelibrary.wiley.com/doi/10.1002/anie.201507170/abstract

Journal of the American Chemical Society by Claudio Saracini, Kei Ohkubo, Tomoyoshi Suenobu, Gerald J. Meyer, Kenneth D. Karlin and Shunichi Fukuzumi DOI: 10.1021/jacs.5b10177 ABSTRACT: Photoexcitation of end-on trans - μ -1,2- peroxodicopper(II) complex [(tmpa) 2 Cu II 2 (O 2 )] 2+ ( 1 ) ( λ max = 525 and 600 nm) and side-on μ  - η 2 : η 2 -peroxodicopper(II) complexes [(N5)Cu II 2 (O 2 )] 2+ ( 2 ) and [(N3)Cu II 2 (O 2 )] 2+ ( 3 ) at − 80 ° C in acetone led to one-photon two-electron peroxide-to-dioxygen oxidation chemistry (O 2 2 − + h ν → O 2  + 2e − ). Interestingly, light excitation of 2 and 3 (having side-on  μ - η 2 : η 2 -peroxo ligation) led to release of dioxygen, while photoexcitation of 1 (having an end-on trans- 1,2-peroxo geometry) did not, even though spectroscopic studies revealed that both reactions proceeded through previously unknown mixed-valent superoxide species: [Cu II (O 2 • − )Cu I ...

Angewandte Chemie International Edition  by Claire Deville, Sandeep K. Padamati, Jonas Sundberg, Vickie McKee, Wesley R. Browne, Christine J. McKenzie   Dr . C. Deville, Dr . J. Sundberg, Prof. Dr . V . McKee, Prof. Dr . C. J. McKenzie Department of Physics, Chemistry and Pharmacy University of Southern Denmark Abstract A Mn II  complex, [Mn(dpeo) 2 ] 2+  (dpeo=1,2-di(pyridin-2-yl)ethanone oxime), activates O 2 , with ensuing stepwise oxidation of the methylene group in the ligands providing an alkoxide and ultimately a ketone group. X-ray crystal-structure analysis of an intermediate homoleptic alkoxide Mn III  complex shows tridentate binding of the ligand via the two pyridyl groups and the newly installed alkoxide moiety, with the oxime group no longer coordinated. The structure of a Mn II  complex of the final ketone ligand,  cis -[MnBr 2 (hidpe) 2 ] (hidpe=2-(hydroxyimino)-1,2-di(pyridine-2-yl)ethanone) shows t...