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Jeong D, Selverstone Valentine J, Cho J. Bio-inspired mononuclear nonheme metal peroxo complexes: Synthesis, structures and mechanistic studies toward understanding enzymatic reactions. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Lin J, Wang F, Tian J, Zhang J, Wang Y, Sun W. Theoretical and experimental investigations of the enantioselective epoxidation of olefins catalyzed by manganese complexes. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.08.092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Narulkar DD, Ansari A, Vardhaman AK, Harmalkar SS, Lingamallu G, Dhavale VM, Sankaralingam M, Das S, Kumar P, Dhuri SN. A side-on Mn(III)-peroxo supported by a non-heme pentadentate N 3Py 2 ligand: synthesis, characterization and reactivity studies. Dalton Trans 2021; 50:2824-2831. [PMID: 33533342 DOI: 10.1039/d0dt03706k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A mononuclear manganese(iii)-peroxo complex [MnIII(N3Py2)(O2)]+ (1a) bearing a non-heme N,N'-dimethyl-N-(2-(methyl(pyridin-2-ylmethyl)amino)ethyl)-N'-(pyridin-2-ylmethyl)ethane-1,2-diamine (N3Py2) ligand was synthesized by the reaction of [Mn(N3Py2)(H2O)](ClO4)2 (1) with hydrogen peroxide and triethylamine in CH3CN at 25 °C. The reactivity of 1a in aldehyde deformylation using 2-phenyl propionaldehyde (2-PPA) was studied and the reaction kinetics was monitored by UV-visible spectroscopy. A kinetic isotope effect (KIE) = 1.7 was obtained in the reaction of 1a with 2-PPA and α-[D1]-PPA, suggesting nucleophilic character of 1a. The activation parameters ΔH‡ and ΔS‡ were determined using the Eyring plot while Ea was obtained from the Arrhenius equation by performing the reaction between 288 and 303 K. Hammett constants (σp) of para-substituted benzaldehydes p-X-Ph-CHO (X = Cl, F, H, and Me) were linear with a slope (ρ) = 3.0. Computational study suggested that the side-on structure of 1a is more favored over the end-on structure and facilitates the reactivity of 1a.
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Affiliation(s)
- Dattaprasad D Narulkar
- School of Chemical Sciences, Goa University, Goa-403206, India. and Department of Chemistry, Dnyanprassarak Mandal's College and Research Centre, Assagao, Goa-403507, India
| | - Azaj Ansari
- Department of Chemistry, Central University of Haryana, Mahendergarh-123031, Haryana, India
| | - Anil Kumar Vardhaman
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad-500007, India
| | | | - Giribabu Lingamallu
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad-500007, India
| | - Vishal M Dhavale
- CSIR-Central Electrochemical Research Institute, CSIR Madras Complex, Taramani, Chennai-600 113, India
| | - Muniyandi Sankaralingam
- Bioinspired & Biomimetic Inorganic Chemistry Lab, Department of Chemistry, National Institute of Technology Calicut, Kozhikode, Kerala 673601, India
| | - Sandip Das
- Indian Institute of Science Education and Research (IISER), Tirupati-517507, India
| | - Pankaj Kumar
- Indian Institute of Science Education and Research (IISER), Tirupati-517507, India
| | - Sunder N Dhuri
- School of Chemical Sciences, Goa University, Goa-403206, India.
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Qiu B, Xia C, Sun W. Bioinspired manganese complexes catalyzed epoxidation for the synthesis of the epoxyketone fragment of carfilzomib. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2018.10.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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