Itoh Group Literature Review

Muniyandi Sankaralingam, Yong-Min Lee, So Hyun Jeon, Mi Sook Seo, Kyung-Bin Cho and Wonwoo Nam* DOI: 10.1039/c7cc09492b http://pubs.rsc.org/en/Content/ArticleLanding/2018/CC/C7CC09492B#!divAbstract 14-TMCを配位子とするマンガン(III)ハイドロパーオキソ錯体の生成と反応生をみています。 酸素もしくは過酸化水素とTEAからマンガン(III)パーオキソを生成し、そのプロトン化からハイドロパーオキソ錯体を生成しています。 このハイドロパーオキソ錯体はチオアニソールの酸素添加(OAT)、キサンテンやDHAなどの水素引き抜き(HAT)などの求電子的な反応と、シクロヘキサンカルボキシアルデヒドの脱ホルミル化といった求核的な反応も進行するようです。

Bhawana Pandey , a      Madhavan Jaccob a b  and   Gopalan Rajaraman * a    Show Affiliations Chem. Commun. , 2017, Advance Article DOI:  10.1039/C6CC08761B Received 01 Nov 2016, Accepted 11 Feb 2017 First published online 13 Feb 2017 Comparative oxidative abilities of nonheme Fe IV NTs and Fe IV O species using DFT has been explored. Our calculations reveal that the Fe IV NTs is found to be a stronger oxidant in two electron transfer reactions and react exclusively  via  π channels while the Fe IV O species is found to be a stronger oxidant when the σ-pathway is activated such as in HAT reactions. http://pubs.rsc.org/en/content/articlelanding/2017/cc/c6cc08761b#!divAbstract

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 genera...

Eric G. Gharakhanian a and Timothy J. Deming* ab  a Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA b Department of Bioengineering, University of California, Los Angeles, CA 90095, USA.  http://pubs.rsc.org/en/Content/ArticleLanding/2016/CC/C6CC01253A#!divAbstract http://pubs.rsc.org/en/content/articlepdf/2016/cc/c6cc01253a   Abstract A methodology was developed for efficient, chemoselective transformation of methionine residues into stable, functional homocysteine derivatives. Methionine residues can undergo highly chemoselective alkylation reactions at low pH to yield stable sulfonium ions, which could then be selectively demethylated to give stable alkyl homocysteine residues. This mild, two-step process is chemoselective, efficient, tolerates many functional groups, and provides a means for creation of new functional biopolymers, site-specific peptide tagging, and s...

Zhi Shan,ab   Mingsheng Lu,ac   Li Wang,ad   Bruce MacDonald,a   Judy MacInnis,e   Martin Mkandawire,a   Xu Zhang*a and   Ken D. Oakes,af  Verschuren Centre for Sustainability in Energy & the Environment, Cape Breton University, Sydney, Canada  Chem. Commun., 2016,52, 2087-2090 DOI: 10.1039/C5CC07446K url: http://pubs.rsc.org/en/content/articlelanding/2016/cc/c5cc07446k#!divAbstract A highly selective, ultrasensitive (visual and instrumental detection limits of 40 nM and 0.1 nM, respectively), environmentally-friendly, simple and rapid colorimetric sensor was developed for the detection of copper(II) in water. This sensor is based on a novel signal-amplification mechanism involving reactive halide species (RHSs) including chlorides or bromides, which accelerate copper Fenton reactions oxidizing the chromogenic substrate to develop colour. The results of this study expand our understanding of copper-based Fenton chemistry. ...

Topologically diverse shape-persistent　bis-(Zn–salphen) catalysts: efficient cyclic　carbonate　formation under mild conditions† Shixiong He, Fuli Wang, Wah-Leung Tong, Shek-Man Yiu and Michael C. W. Chan* Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China. DOI: 10.1039/c5cc08794e Abstruct By adopting a shape-persistent bimetallic design approach, high　initial molecular turnover frequencies (up to 14800 h 1) for coupling　of CO2 with epoxides in conjunction with nBu4NI, plus excellent　yields under mild conditions (1 bar of CO2, 45 8C) have been achieved　for catalysts　containing cofacial Zn–salphen units.