Reactivity of Zinc Thiolate Bonds: Oxidative Organopolysulfide Formation and S<sub>3</sub> Insertion
作者:Moises Ballesteros、Emily Y. Tsui
DOI:10.1021/acs.inorgchem.9b01074
日期:2019.8.19
bimetallic disulfide-bridged complex. In contrast, the addition of elemental sulfur to [Et4N]2[LZn] resulted in the insertion of a neutral S3 fragment into the Zn–thiolate bond to selectively form an unusual monometallic tetrasulfanido complex. When oxidized, this tetrasulfanido compound rearranged to form a bimetallic trisulfide-bridged complex. The observed diversity of zinc thiolate reactivity, particularly
Modulation of the p<i>K</i><sub>a</sub> of Metal-Bound Water via Oxidation of Thiolato Sulfur in Model Complexes of Co(III) Containing Nitrile Hydratase: Insight into Possible Effect of Cysteine Oxidation in Co−Nitrile Hydratase
作者:Laurie A. Tyler、Juan C. Noveron、Marilyn M. Olmstead、Pradip K. Mascharak
DOI:10.1021/ic030088s
日期:2003.9.1
studied to understand the behavior of the Co(III) site in Co-NHase. Unlike typical Co(III) complexes with bound CN(-) ligands, the Co(III) centers in 2 and 5 are labile and rapidly lose CN(-) in aqueous solutions. Since 3 does not show this lability, it appears that at least one thiolato sulfur donor is required in the first coordination sphere for the Co(III) center in such species to exhibit lability. Both
Co(III) Complexes with Carboxamido N and Thiolato S Donor Centers: Models for the Active Site of Co-Containing Nitrile Hydratases
作者:Juan C. Noveron、Marilyn M. Olmstead、Pradip K. Mascharak
DOI:10.1021/ja9833523
日期:1999.4.1
Convenient One-Pot Synthesis of<i>N</i>,<i>N</i> ′<i>-bis</i>(2-Mercaptophenyl)pyridine-2,6-dicarboxamide and<i>N</i>-2-Mercaptophenyl-2′-pyridinecarboxamide Without Protection of the Thiol Group(s)
作者:Todd C. Harrop、Karina Rodriguez、Pradip K. Mascharak
DOI:10.1081/scc-120020209
日期:2003.6
A rapid and convenient procedure for the synthesis of N,N'-bis(2-mercaptophenyl)pyridine-2,6-dicarboxamide and N-2-mercaptophenyl-2'-pyridinecarboxamide from 2-aminothiophenol and the appropriate acid chloride is reported. The method is compatible only with aromatic acid chlorides containing a heteroatom. Aromatic acid chlorides with no heteroatom yield the corresponding 2-substituted benzothiazoles.
A Synthetic Analogue of the Active Site of Fe-Containing Nitrile Hydratase with Carboxamido N and Thiolato S as Donors: Synthesis, Structure, and Reactivities
作者:Juan C. Noveron、Marilyn M. Olmstead、Pradip K. Mascharak
DOI:10.1021/ja001253v
日期:2001.4.1
As part of our work on models of the iron(III) site of Fe-containing nitrilehydratase, a designed ligand PyPSH(4) with two carboxamide and two thiolate donor groups has been synthesized. Reaction of (Et(4)N)[FeCl(4)] with the deprotonated form of the ligand in DMF affords the mononuclear iron(III) complex (Et(4)N)[Fe(III)(PyPS)] (1) in high yield. The iron(III) center is in a trigonal bipyramidal