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Farshadfar K, Gunawan N, Shiri F, Howard JK, Vaas APJP, Bissember AC, Yates BF, Smith JA, Ariafard A. Discovery of Periodinane Oxy-Assisted (POA) Oxidation Mechanism in the IBX-Controlled Oxidative Dearomatization of Pyrroles Mediated by Acetic Acid. J Org Chem 2022; 87:13280-13287. [PMID: 36162101 DOI: 10.1021/acs.joc.2c01923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The 2-iodoxybenzoic acid (IBX)-controlled oxidative dearomatization of pyrroles occurs very slowly (or not all) in many organic solvents, including DMSO in which IBX is soluble. Interestingly, although IBX is only partially soluble in acetic acid, this solvent mediates the pyrrole oxidative dearomatization. With the aid of density functional theory (DFT) calculations, we have discovered a new mode of reactivity, termed the periodinane oxy-assisted (POA) oxidation mechanism, which explains this observation.
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Affiliation(s)
- Kaveh Farshadfar
- Department of Chemistry, Islamic Azad University, Central Tehran Branch, Poonak, Tehran 1469669191, Iran.,Research Group of Computational Chemistry, Department of Chemistry and Materials Science, Aalto University, FI-00076 Aalto, Finland
| | - Nina Gunawan
- School of Natural Sciences, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia
| | - Farshad Shiri
- Department of Chemistry, Islamic Azad University, Central Tehran Branch, Poonak, Tehran 1469669191, Iran
| | - James K Howard
- School of Natural Sciences, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia
| | | | - Alex C Bissember
- School of Natural Sciences, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia
| | - Brian F Yates
- School of Natural Sciences, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia
| | - Jason A Smith
- School of Natural Sciences, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia
| | - Alireza Ariafard
- School of Natural Sciences, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia
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Qi Y, Gu X, Huang X, Shen G, Yang B, He Q, Xue Z, Du M, Shi L, Yu B. Microwave-assisted controllable synthesis of 2-acylbenzothiazoles and bibenzo[b][1,4]thiazines from aryl methyl ketones and disulfanediyldianilines. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.05.069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Farshadfar K, Ariafard A. Catalytic role of amines in activation of PhICl 2 from a computational point of view. Chem Commun (Camb) 2021; 57:9108-9111. [PMID: 34498641 DOI: 10.1039/d1cc03618a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We thoroughly investigated mechanistic features of dichlorination of diazoacetates using PhICl2 catalysed by pyridine. We found that the pyridine serves as a catalyst for decomposition of PhICl2 to PhI and Cl2, leading to the dichlorination step being driven by the in situ generated Cl2. This type of activation was found to be applicable to other amine-catalysed chlorination reactions using PhICl2.
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Affiliation(s)
- Kaveh Farshadfar
- Department of Chemistry, Islamic Azad University, Central Tehran Branch, Poonak, Tehran 1469669191, Iran
| | - Alireza Ariafard
- Department of Chemistry, Islamic Azad University, Central Tehran Branch, Poonak, Tehran 1469669191, Iran.,School of Natural Sciences, University of Tasmania, Private Bag 75, Hobart TAS 7001, Australia.
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