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Bisht R, Popescu MV, He Z, Ibrahim AM, Crisenza GEM, Paton RS, Procter DJ. Metal-Free Arylation of Benzothiophenes at C4 by Activation as their Benzothiophene S-Oxides. Angew Chem Int Ed Engl 2023; 62:e202302418. [PMID: 37000422 PMCID: PMC10953450 DOI: 10.1002/anie.202302418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/29/2023] [Accepted: 03/31/2023] [Indexed: 04/01/2023]
Abstract
Benzothiophenes, activated by oxidation to the corresponding S-oxides, undergo C-H/C-H-type coupling with phenols to give C4 arylation products. While an electron-withdrawing group at C3 of the benzothiophene is important, the process operates without a directing group and a metal catalyst, thus rendering it compatible with sensitive functionalities-e.g. halides and formyl groups. Quantum chemical calculations suggest a formal stepwise mechanism involving heterolytic cleavage of an aryloxysulfur species to give a π-complex of the corresponding benzothiophene and a phenoxonium cation. Subsequent addition of the phenoxonium cation to the C4 position of the benzothiophene is favored over the addition to C3; Fukui functions predict that the major regioisomer is formed at the more electron-rich position between C3 and C4. Varied selective manipulation of the benzothiophene products showcase the synthetic utility of the metal-free arylation process.
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Affiliation(s)
- Ranjana Bisht
- Department of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | - Mihai V. Popescu
- Department of ChemistryColorado State UniversityCenter AveFort CollinsCO80523USA
| | - Zhen He
- Department of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | - Ameer M. Ibrahim
- Department of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | | | - Robert S. Paton
- Department of ChemistryColorado State UniversityCenter AveFort CollinsCO80523USA
| | - David J. Procter
- Department of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
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Bai JF, Tang J, Gao X, Jiang ZJ, Tang B, Chen J, Gao Z. Regioselective Cycloaddition and Substitution Reaction of Tertiary Propargylic Alcohols and Heteroareneboronic Acids via Acid Catalysis. Org Lett 2022; 24:4507-4512. [PMID: 35708270 DOI: 10.1021/acs.orglett.2c01403] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report an acid-catalyzed formal cycloaddition and dehydrative substitution reaction of tertiary propargylic alcohols and heteroareneboronic acids. The properties of the substituents on the alkynyl moiety determines the regioselectivity of the reaction, which could selectively construct fused heterocycles, tetrasubstituted allenes, or 1,3-dienes. This reaction proceeds efficiently with a wide array of substrate scope in up to 89% yield. A significant advantage of this protocol is the transition-metal-free and mild conditions needed.
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Affiliation(s)
- Jian-Fei Bai
- School of Biological and Chemical Engineering, NingboTech University, 315100 Ningbo, P. R. China
| | - Jianbo Tang
- School of Biological and Chemical Engineering, NingboTech University, 315100 Ningbo, P. R. China
| | - Xiaolong Gao
- Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, 730000 Lanzhou, P. R. China
| | - Zhi-Jiang Jiang
- School of Biological and Chemical Engineering, NingboTech University, 315100 Ningbo, P. R. China
| | - Bencan Tang
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Ningbo China, 315100 Ningbo, PR China
| | - Jia Chen
- School of Biological and Chemical Engineering, NingboTech University, 315100 Ningbo, P. R. China
| | - Zhanghua Gao
- School of Biological and Chemical Engineering, NingboTech University, 315100 Ningbo, P. R. China
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Hu HW, Zhang C, Yang YM, Deng HQ, Tang ZY. Photocatalytic decarboxylative alkylation of electron-rich heteroarenes with alkyl N-hydroxyphthalimide esters. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Functionalization of Porphyrins Using Metal-Catalyzed C–H Activation. INORGANICS 2022. [DOI: 10.3390/inorganics10050063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The review is devoted to the C–H functionalization of porphyrins. Porphyrins exhibit the properties of organic semiconductors, light energy converters, chemical and electrochemical catalysts, and photocatalysts. The review describes the iridium- and palladium-catalyzed direct functionalization of porphyrins, with more attention given to the results obtained in our laboratory. The development and improvement of synthetic methods that do not require preliminary modification of the substrate with various functional groups are extremely important for the preparation of new organic materials based on porphyrins. This makes it possible to simplify the synthetic procedure, to make the synthesis more economical, environmentally safe, and simple to perform.
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Kwak H, Kang E, Song JY, Kang G, Joo JM. Pd‐Catalyzed Cyclization of Alkynyl Norbornene Derivatives for the Synthesis of Benzofused Heteroarenes. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100763] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Hayeon Kwak
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 Republic of Korea
| | - Eunsu Kang
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 Republic of Korea
| | - Jae Yeong Song
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 Republic of Korea
| | - Geunhee Kang
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 Republic of Korea
| | - Jung Min Joo
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 Republic of Korea
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Kumaran S, Parthasarathy K. Rh(III)-Catalyzed Oxidative C-2 Coupling of N-Pyridinylindoles with Benzo[ b]thiophene 1,1-Dioxides via C-H Bond Activation. J Org Chem 2021; 86:7987-7999. [PMID: 34096307 DOI: 10.1021/acs.joc.1c00301] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient Rh(III)-catalyzed cross-dehydrogenative coupling of N-pyridinylindoles with benzo[b]thiophene 1,1-dioxides has been developed through directing-group-assisted C-H activation. This transformation constructs a new C-C bond from two inert C-H bonds in a one-pot reaction. The present reaction is compatible with various functional groups with respect to indoles and benzothiophene[b] 1,1-dioxides. Furthermore, the emission properties of synthesized compounds have been explored.
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Affiliation(s)
- Subramani Kumaran
- Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai, Tamilnadu 600025, India
| | - Kanniyappan Parthasarathy
- Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai, Tamilnadu 600025, India
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Mohr Y, Alves-Favaro M, Rajapaksha R, Hisler G, Ranscht A, Samanta P, Lorentz C, Duguet M, Mellot-Draznieks C, Quadrelli EA, Wisser FM, Canivet J. Heterogenization of a Molecular Ni Catalyst within a Porous Macroligand for the Direct C–H Arylation of Heteroarenes. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00209] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yorck Mohr
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON - UMR 5256, 2 Av. Albert Einstein, 69626 Villeurbanne, France
| | - Marcelo Alves-Favaro
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON - UMR 5256, 2 Av. Albert Einstein, 69626 Villeurbanne, France
| | - Rémy Rajapaksha
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON - UMR 5256, 2 Av. Albert Einstein, 69626 Villeurbanne, France
| | - Gaëlle Hisler
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON - UMR 5256, 2 Av. Albert Einstein, 69626 Villeurbanne, France
| | - Alisa Ranscht
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON - UMR 5256, 2 Av. Albert Einstein, 69626 Villeurbanne, France
| | - Partha Samanta
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON - UMR 5256, 2 Av. Albert Einstein, 69626 Villeurbanne, France
| | - Chantal Lorentz
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON - UMR 5256, 2 Av. Albert Einstein, 69626 Villeurbanne, France
| | - Mathis Duguet
- Laboratoire de Chimie des Processus Biologiques (LCPB) Collège de France, PSL Research University, CNRS Sorbonne Université, 11 Place Marcelin Berthelot, 75231 Paris, Cedex 05, France
| | - Caroline Mellot-Draznieks
- Laboratoire de Chimie des Processus Biologiques (LCPB) Collège de France, PSL Research University, CNRS Sorbonne Université, 11 Place Marcelin Berthelot, 75231 Paris, Cedex 05, France
| | - Elsje Alessandra Quadrelli
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON - UMR 5256, 2 Av. Albert Einstein, 69626 Villeurbanne, France
| | - Florian M. Wisser
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON - UMR 5256, 2 Av. Albert Einstein, 69626 Villeurbanne, France
- Institute of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Jérôme Canivet
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON - UMR 5256, 2 Av. Albert Einstein, 69626 Villeurbanne, France
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Chen L, Zou YX, Zheng SL, Liu XY, Yang HL, Zhang J, Zeng Y, Duan L, Wen Z, Ni HL. Dearomative 1,6-addition of P(O)–H to in situ formed p-QM-like ion pairs from 2-benzofuryl-ols to C3-phosphinoyl hydrobenzofurans. Org Chem Front 2021. [DOI: 10.1039/d1qo00076d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report a dearomative C3-phosphorylation and a tandem C3-phosphorylation/aromatization of 2-benzofuryl-ols with P(O)–H species to afford C3-phosphinoyl hydrobenzofurans and benzofurans, respectively.
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