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7月, 2016の投稿を表示しています

The Uranyl Cation as a Visible-Light Photocatalyst for C(sp3)−H Fluorination

Julian G. West, T. Aaron Bedell, Prof. Erik J. Sorensen Angew. Chem. Int. Ed. 2016 , 55 , 8923 Princeton University, USA First published: 20 June 2016 DOI: 10.1002/anie.201603149 Abstract The fluorination of unactivated C(sp3)−H bonds remains a desirable and challenging transformation for pharmaceutical, agricultural, and materials scientists. Previous methods for this transformation have used bench-stable fluorine atom sources; however, many still rely on the use of UV-active photocatalysts for the requisite high-energy hydrogen atom abstraction event. Uranyl nitrate hexahydrate is described as a convenient, hydrogen atom abstraction catalyst that can mediate fluorinations of certain alkanes upon activation with visible light.

Practical Synthesis of Amides via Copper/ABNO-Catalyzed Aerobic Oxidative Coupling of Alcohols and Amines

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

Dioxygen Binding, Activation, and Reduction to H2O by Cu Enzymes

Edward I. Solomon Stanford University, Stanford, California 94305, United States Inorg. Chem. 2016, 55 (13), pp 6364–6375 DOI: 10.1021/acs.inorgchem.6b01034 Publication Date (Web): June 14, 2016 http://pubs.acs.org/doi/abs/10.1021/acs.inorgchem.6b01034 Synopsis Oxygen intermediates exhibit unique spectroscopic features that reflect novel geometric and electronic structures that are key to reactivity. These structure/function correlations are summarized. This is award article (the Alfred Bader Award in Bioinorganic or Bioorganic Chemistry, ACS) This paper maybe helpful if you want to know the MO and spectroscopic feature of Cu-reactive oxygen species generating in proteins.

Upcoming Changes for Inorganic Chemistry: Adding Titles to References and Adjusting Communication Length Requirements

Inorganic Chemistry, Editorial William B. Tolman, Editor-in-Chief DOI: 10.1021/acs.inorgchem.6b01380 8/1 以降にICに投稿するペーパーは、引用論文に、タイトルをつける必要があるそうです。 新しい形式 Journal Publications: Doe, J. S.; Smith, J.; Roe, P. Compounds with Strange Bonding Motifs. J. Am. Chem. Soc. 1968 , 90 , 8234−8241. Papers Published Online or In Press: Doe, J. S.; Smith, J.; Roe, P. Method for Synthesizing Large Cobalt Clusters. Inorg. Chem. 2016 , DOI: 10.1021/acs.inorg- chem.xxxx (where xxxx refers to the unique paper identifier). and so on. 対応したEndnoteのスタイルは、まだ出てないようです。(16/07/07現在)

Non-heme μ-Oxo- and bis(μ-carboxylato)-bridged diiron(III) complexes of a 3N ligand as catalysts for alkane hydroxylation: stereoelectronic factors of carboxylate bridges determine the catalytic efficiency

Mani Balamurugan , a      Eringathodi Suresh b  and   Mallayan Palaniandavar * a    Show Affiliations Dalton Trans. , 2016, Advance Article DOI:  10.1039/C6DT01059H http://pubs.rsc.org/en/content/articlelanding/2016/dt/c6dt01059h#!divAbstract Abstract A series of non-heme (μ-oxo)bis(μ-dicarboxylato)-bridged diiron( III ) complexes, [Fe 2 (O)(OOCH) 2 (L) 2 ] 2+   1 , [Fe 2 (O)(OAc) 2 (L) 2 ] 2+   2 , [Fe 2 (O)(Me 3 AcO) 2 (L) 2 ] 2+   3 , [Fe 2 (O)(OBz) 2 (L) 2 ] 2+   4 , [Fe 2 (O)(Ph 2 AcO) 2 (L) 2 ] 2+   5  and [Fe 2 (O)(Ph 3 AcO) 3 (L) 2 ] 2+   6 , where L =  N , N -dimethyl- N ′-(pyrid-2-ylmethyl)ethylenediamine, OAc −  = acetate, Me 3 AcO −  = trimethylacetate, OBz −  = benzoate, Ph 2 AcO −  = diphenylacetate and Ph 3 AcO −  = triphenylacetate, have been isolated and characterized using elemental analysis and spectral and electrochemical techniques. They have been studied as catalysts for the selective oxidation of alkanes using  m -chloroperbenzoic acid ( m -CPBA
Ruthenium(II)-Catalyzed Regioselective C–H Arylation of Cyclic and  N , N -Dialkyl Benzamides with Boronic Acids by Weak Coordination Pradeep Nareddy ,  Frank Jordan ,  Stacey E. Brenner-Moyer , and  Michal Szostak * Department of Chemistry,  Rutgers University , 73 Warren Street, Newark, New Jersey 07102,  United States ACS Catal. ,  2016 ,  6  (7), pp 4755–4759 DOI:  10.1021/acscatal.6b01360 Publication Date (Web): June 22, 2016 Copyright © 2016 American Chemical Society *E-mail:  michal.szostak@rutgers.edu . http://pubs.acs.org/doi/abs/10.1021%2Facscatal.6b01360 Abstract We disclose a general method for selective ortho-C–H arylation of cyclic and  N , N -dialkyl benzamides with boronic acids enabled by versatile ruthenium(II) complexes. This method features a general C–H arylation of ubiquitous aromatic tertiary benzamides by weak O-coordination. The transformation is characterized by its operational simplicity, the use of inexpensive, air-stable Ru(II)

Homolytic cleavage of the O–Cu(II) bond: XAFS and EPR spectroscopy evidence for one electron reduction of Cu(II) to Cu(I)

Hong Yi,a   Guanghui Zhang,a   Jie Xin,a   Yi Deng,a   Jeffrey T. Miller,bc   Arthur J. Kropf,b   Emilio E. Bunel,b   Xiaotian Qi,d   Yu Lan,d   Jyh-Fu Leee and    Aiwen Lei*abf a: College of Chemistry and Molecular Sciences, the Institute for Advanced Studies, Wuhan University, Wuhan, People's Republic of China d: National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan and so on Chem. Commun.,  2016, 52, 6914-6917 DOI: 10.1039/C6CC01413E Abstract The investigation into the active copper(I) catalysts from copper(II) precursors has become a fundamental and important task in copper catalysis. In this work, we demonstrate that the tBuO− anion serves not only as a base but also as a mediator to promote the reduction of Cu(II) to Cu(I) in copper catalysis. XAFS and EPR spectroscopy evidence the [Cu(OtBu)3]− ate complex as the key intermediate which undergoes homolytic-cleavage of the O–Cu(II) bond generating [Cu(OtBu)2]− ate complex. This process proceeded i