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Long CJ, Pu HP, Zhao YN, He YH, Guan Z. Cooperative photocatalysis and l-/ d-proline catalysis enables enantioselective oxidative cross-dehydrogenative coupling of acyclic benzylic secondary amines with ketones. Org Chem Front 2023. [DOI: 10.1039/d2qo01956f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
We developed an enantioselective cross-dehydrogenative coupling of acyclic benzylic secondary amines with ketones by combining photocatalysis and l-/d-proline catalysis.
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2
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Li J. Direct deoxygenative borylation. PURE APPL CHEM 2022. [DOI: 10.1515/pac-2022-7603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Abstract
Direct deoxygenative borylation is a highly enabling chemical transformation considering the attractive synthetic features of oxygenous feedstocks and organoboron compounds. Despite ranking among the synthetic ideality in different settings, such chemical space remained largely uncharted and underutilized until recent decades. This short review will summarize some key advances in the field of direct deoxy-borylation of alcohols, ethers, aldehydes, ketones, and carboxylic acids and organize these contributions based on substrate classes. In each representative, the general features, including reaction conditions, product scopes and mechanistic insights, will be highlighted and discussed.
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Affiliation(s)
- Jianbin Li
- Department of Chemistry , Indiana University , Bloomington , IN 47405 , USA
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3
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Li J, Huang CY, Li CJ. A ligand-enabled metallaphotoredox protocol for Suzuki-Miyaura cross-couplings for the synthesis of diarylmethanes. STAR Protoc 2022; 3:101618. [PMID: 36035803 PMCID: PMC9405098 DOI: 10.1016/j.xpro.2022.101618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Here, we present a ligand-enabled metallaphotoredox Suzuki-Miyaura cross-coupling protocol for the facile synthesis of diarylmethanes. Specifically, we describe the preparation of a unique class of ligands, 2,4-diarylquinolines, and demonstrate their application in nickel-catalyzed fragment couplings between alkyltrifluoroborates and haloarenes. We detail the synthesis of the most enabling ligand, PPQN2,4-di-OMe, on a gram scale via sequential Grignard reaction and Friedländer condensation. We also outline how coupling reactions are performed without external photocatalysts under violet light irradiation. For complete details on the use and execution of this protocol, please refer to Li et al. (2022b). Design of a photoactive ligand for single-catalyst metallaphotoredox cross-couplings Two-step synthesis of the photoactive ligand under transition metal-free conditions C(sp3)-C(sp2) Suzuki-Miyaura cross-couplings under Ni-metallaphotoredox catalysis Diarylmethane synthesis from readily available benzyltrifluoroborates and aryl halides
Publisher’s note: Undertaking any experimental protocol requires adherence to local institutional guidelines for laboratory safety and ethics.
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4
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Panther LA, Guest DP, McGown A, Emerit H, Tareque RK, Jose A, Dadswell CM, Coles SJ, Tizzard GJ, González‐Méndez R, Goodall CAI, Bagley MC, Spencer J, Greenland BW. Solvent‐Free Synthesis of Core‐Functionalised Naphthalene Diimides by Using a Vibratory Ball Mill: Suzuki, Sonogashira and Buchwald–Hartwig Reactions. Chemistry 2022; 28:e202201444. [PMID: 35621283 PMCID: PMC9544761 DOI: 10.1002/chem.202201444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Indexed: 11/07/2022]
Abstract
Solvent‐free synthesis by using a vibratory ball mill (VBM) offers the chance to access new chemical reactivity, whilst reducing solvent waste and minimising reaction times. Herein, we report the core functionalisation of N,N’‐bis(2‐ethylhexyl)‐2,6‐dibromo‐1,4,5,8‐naphthalenetetracarboxylic acid (Br2‐NDI) by using Suzuki, Sonogashira and Buchwald–Hartwig coupling reactions. The products of these reactions are important building blocks in many areas of organic electronics including organic light‐emitting diodes (OLEDs), organic field‐effect transistors (OFETs) and organic photovoltaic cells (OPVCs). The reactions proceed in as little as 1 h, use commercially available palladium sources (frequently Pd(OAc)2) and are tolerant to air and atmospheric moisture. Furthermore, the real‐world potential of this green VBM protocol is demonstrated by the double Suzuki coupling of a monobromo(NDI) residue to a bis(thiophene) pinacol ester. The resulting dimeric NDI species has been demonstrated to behave as an electron acceptor in functioning OPVCs.
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Affiliation(s)
- Lydia A. Panther
- Department of Chemistry School of Life Sciences University of Sussex Arundel Building 305 Falmer, Brighton BN1 9QJ UK
| | - Daniel P. Guest
- Department of Chemistry School of Life Sciences University of Sussex Arundel Building 305 Falmer, Brighton BN1 9QJ UK
| | - Andrew McGown
- Department of Chemistry School of Life Sciences University of Sussex Arundel Building 305 Falmer, Brighton BN1 9QJ UK
| | - Hugo Emerit
- Department of Chemistry School of Life Sciences University of Sussex Arundel Building 305 Falmer, Brighton BN1 9QJ UK
| | - Raysa Khan Tareque
- Department of Chemistry School of Life Sciences University of Sussex Arundel Building 305 Falmer, Brighton BN1 9QJ UK
| | - Arathy Jose
- Department of Chemistry School of Life Sciences University of Sussex Arundel Building 305 Falmer, Brighton BN1 9QJ UK
| | - Chris M. Dadswell
- Department of Chemistry School of Life Sciences University of Sussex Arundel Building 305 Falmer, Brighton BN1 9QJ UK
| | - Simon J. Coles
- UK National Crystallography Service Chemistry University of Southampton University Road Southampton SO17 1BJ UK
| | - Graham J. Tizzard
- UK National Crystallography Service Chemistry University of Southampton University Road Southampton SO17 1BJ UK
| | - Ramón González‐Méndez
- Department of Chemistry School of Life Sciences University of Sussex Arundel Building 305 Falmer, Brighton BN1 9QJ UK
| | - Charles A. I. Goodall
- Faculty of Engineering & Science FES Engineering & Science School Operations University of Greenwich Old Royal Naval College Park Row London SE10 9LS UK
| | - Mark C. Bagley
- Department of Chemistry School of Life Sciences University of Sussex Arundel Building 305 Falmer, Brighton BN1 9QJ UK
| | - John Spencer
- Department of Chemistry School of Life Sciences University of Sussex Arundel Building 305 Falmer, Brighton BN1 9QJ UK
- Sussex Drug Discovery Centre School of Life Sciences University of Sussex Falmer, Brighton BN1 9QG UK
| | - Barnaby W. Greenland
- Department of Chemistry School of Life Sciences University of Sussex Arundel Building 305 Falmer, Brighton BN1 9QJ UK
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6
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Bera SK, Bhanja R, Mal P. DDQ in mechanochemical C–N coupling reactions. Beilstein J Org Chem 2022; 18:639-646. [PMID: 35706992 PMCID: PMC9174842 DOI: 10.3762/bjoc.18.64] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 05/20/2022] [Indexed: 12/25/2022] Open
Abstract
2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) is a commonly known oxidant. Herein, we report that DDQ can be used to synthesize 1,2-disubstituted benzimidazoles and quinazolin-4(3H)-ones via the intra- and intermolecular C–N coupling reaction under solvent-free mechanochemical (ball milling) conditions. In the presence of DDQ, the intramolecular C(sp2)–H amidation of N-(2-(arylideneamino)phenyl)-p-toluenesulfonamides leads to 1,2-disubstituted benzimidazoles and the one-pot coupling of 2-aminobenzamides with aryl/alkyl aldehydes resulted in substituted quinazolin-4(3H)-one derivatives in high yields.
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Affiliation(s)
- Shyamal Kanti Bera
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India
| | - Rosalin Bhanja
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India
| | - Prasenjit Mal
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India
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7
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8
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Abstract
The classical Wolff–Kishner reduction plays a key role in organic synthesis to convert carbonyl functionalities into methylene groups; however, it generally requires harsh reaction conditions and a strategy with wider applications demands further development.
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Affiliation(s)
- Ruohua Gui
- Department of Chemistry and FQRNT Center for Green Chemistry and Catalysis, McGill University 801 Sherbrooke St. W., Montreal, Quebec H3A 0B8, Canada
| | - Chao-Jun Li
- Department of Chemistry and FQRNT Center for Green Chemistry and Catalysis, McGill University 801 Sherbrooke St. W., Montreal, Quebec H3A 0B8, Canada
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9
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Wang Q, Wang X, Yu M, Song H, Liu YX. Palladium Metallaphotoredox-Catalyzed 3-Acylation of Indole Derivatives. Chem Commun (Camb) 2022; 58:9492-9495. [DOI: 10.1039/d2cc03658d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aldehydes and indoles generally undergo nucleophilic addition reactions to generate alcohols rather than ketones. Here, we report a method for synthesis of 3-acyl indoles from aldehydes by a combination of...
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10
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Biocatalytic Production of Aldehydes: Exploring the Potential of Lathyrus cicera Amine Oxidase. Biomolecules 2021; 11:biom11101540. [PMID: 34680172 PMCID: PMC8533949 DOI: 10.3390/biom11101540] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/11/2021] [Accepted: 10/16/2021] [Indexed: 01/21/2023] Open
Abstract
Aldehydes are a class of carbonyl compounds widely used as intermediates in the pharmaceutical, cosmetic and food industries. To date, there are few fully enzymatic methods for synthesizing these highly reactive chemicals. In the present work, we explore the biocatalytic potential of an amino oxidase extracted from the etiolated shoots of Lathyrus cicera for the synthesis of value-added aldehydes, starting from the corresponding primary amines. In this frame, we have developed a completely chromatography-free purification protocol based on crossflow ultrafiltration, which makes the production of this enzyme easily scalable. Furthermore, we determined the kinetic parameters of the amine oxidase toward 20 differently substituted aliphatic and aromatic primary amines, and we developed a biocatalytic process for their conversion into the corresponding aldehydes. The reaction occurs in aqueous media at neutral pH in the presence of catalase, which removes the hydrogen peroxide produced during the reaction itself, contributing to the recycling of oxygen. A high conversion (>95%) was achieved within 3 h for all the tested compounds.
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11
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Sarmah BK, Konwar M, Das A. Site-Selective Deoxygenative Amination of Azine N-Oxides with Carbodiimides under Catalyst-, Activator-, Base-, and Solvent-Free Conditions. J Org Chem 2021; 86:10762-10772. [PMID: 34260234 DOI: 10.1021/acs.joc.1c00741] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
An operationally simple method for synthesizing 2-amino azines via [3+2] dipolar cycloaddition of azine N-oxide with carbodiimide has been demonstrated. The reaction can proceed smoothly under simple heating conditions without any transition metal catalyst, activator, base, and solvent. This transformation demonstrates a broad substrate scope and produces CO2 as the only co-product. The applicability of this method is highlighted by the late-stage modification of bioactive molecules, including quinine, (±)-α-tocopherol, and tryptamine modified quinoline.
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Affiliation(s)
- Bikash Kumar Sarmah
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, India
| | - Monuranjan Konwar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, India
| | - Animesh Das
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, India
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12
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Liu MS, Min L, Chen BH, Shu W. Dual Catalysis Relay: Coupling of Aldehydes and Alkenes Enabled by Visible-Light and NHC-Catalyzed Cross-Double C–H Functionalizations. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02890] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Ming-Shang Liu
- Shenzhen Grubbs Institute, Department of Chemistry, and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, Guangdong, P.R. China
| | - Lin Min
- Shenzhen Grubbs Institute, Department of Chemistry, and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, Guangdong, P.R. China
| | - Bi-Hong Chen
- Shenzhen Grubbs Institute, Department of Chemistry, and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, Guangdong, P.R. China
| | - Wei Shu
- Shenzhen Grubbs Institute, Department of Chemistry, and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, Guangdong, P.R. China
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13
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C(sp 3)-C(sp 3) bond formation via nickel-catalyzed deoxygenative homo-coupling of aldehydes/ketones mediated by hydrazine. Nat Commun 2021; 12:3729. [PMID: 34140496 PMCID: PMC8211713 DOI: 10.1038/s41467-021-23971-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 05/25/2021] [Indexed: 11/16/2022] Open
Abstract
Aldehydes and ketones are widely found in biomass resources and play important roles in organic synthesis. However, the direct deoxygenative coupling of aldehydes or ketones to construct C(sp3)−C(sp3) bond remains a scientific challenge. Here we report a nickel−catalyzed reductive homo-coupling of moisture- and air-stable hydrazones generated in-situ from naturally abundant aldehydes and ketones to construct challenging C(sp3)−C(sp3) bond. This transformation has great functional group compatibility and can suit a broad substrate scope with innocuous H2O, N2 and H2 as the by-products. Furthermore, the application in several biological molecules and the transformation of PEEK model demonstrate the generality, practicability, and applicability of this novel methodology. The direct deoxygenative coupling of aldehydes or ketones to construct C(sp3)−C(sp3) bond remains a scientific challenge. Here the authors use a nickel−catalyzed reductive homo-coupling of moisture- and air-stable hydrazones generated in-situ from naturally abundant aldehydes and ketones to construct challenging C(sp3)−C(sp3) bonds.
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14
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Zhang J, Li YF, Jia FC, Gao Y, Hu XQ. Strain-release enabled [3 + 2] annulation of 3-aminooxetanes with simple CN bonds: facile synthesis of imidazolidines. Org Chem Front 2021. [DOI: 10.1039/d1qo01164b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
An unprecedented [3+2] annulation of readily available 1,3,5-triazinanes and 3-aminooxetanes is accomplished for the first time, enabling the convenient synthesis of a range of structurally diverse 4-hydroxymethyl imidazolidines.
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Affiliation(s)
- Jing Zhang
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, China
| | - Yi-Fei Li
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, China
| | - Feng-Cheng Jia
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, China
| | - Yang Gao
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Xiao-Qiang Hu
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, China
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15
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Ran M, He J, Yan B, Liu W, Li Y, Fu Y, Li CJ, Yao Q. Catalyst-free generation of acyl radicals induced by visible light in water to construct C–N bonds. Org Biomol Chem 2021; 19:1970-1975. [DOI: 10.1039/d0ob02364g] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new route to produce acyl radicals by the cleavage of Csp2–Csp2 bonds of α-diketones irradiated by visible light was developed and hydroxylamides or amides were selectively synthesized in water.
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Affiliation(s)
- Maogang Ran
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- Department of Pharmacy
- Zunyi Medical University
- Zunyi
| | - Jiaxin He
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- Department of Pharmacy
- Zunyi Medical University
- Zunyi
| | - Boyu Yan
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- Department of Pharmacy
- Zunyi Medical University
- Zunyi
| | - Wenbo Liu
- Department of Chemistry
- McGill University
- Montreal
- Canada
| | - Yi Li
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- Department of Pharmacy
- Zunyi Medical University
- Zunyi
| | - Yunfen Fu
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- Department of Pharmacy
- Zunyi Medical University
- Zunyi
| | - Chao-Jun Li
- Department of Chemistry
- McGill University
- Montreal
- Canada
| | - Qiuli Yao
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- Department of Pharmacy
- Zunyi Medical University
- Zunyi
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16
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Xu X, Amuti A, Wusiman A. Catalyst and Additive‐Free Direct Amidation/Halogenation of Tertiary Arylamines with
N
‐haloimide/amides. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000796] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Xiu‐Juan Xu
- School of Chemistry and Chemical Engineering Xinjiang Normal University Urumqi 830054 People's Republic of China
| | - Adila Amuti
- School of Chemistry and Chemical Engineering Xinjiang Normal University Urumqi 830054 People's Republic of China
| | - Abudureheman Wusiman
- School of Chemistry and Chemical Engineering Xinjiang Normal University Urumqi 830054 People's Republic of China
- Xinjiang Key Laboratory of Energy Storage and Photoelectrocatalytic Materials Urumqi 830054 People's Republic of China
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17
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Cao D, Chen Z, Lv L, Zeng H, Peng Y, Li CJ. Light-Driven Metal-Free Direct Deoxygenation of Alcohols under Mild Conditions. iScience 2020; 23:101419. [PMID: 32798970 PMCID: PMC7452908 DOI: 10.1016/j.isci.2020.101419] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/02/2020] [Accepted: 07/24/2020] [Indexed: 12/18/2022] Open
Abstract
Hydroxyl is widely found in organic molecules as functional group and its deprivation plays an inevitable role in organic synthesis. However, the direct cleavage of Csp3-O bond in alcohols with high selectivity and efficiency, especially without the assistance of metal catalyst, has been a formidable challenge because of its strong bond dissociation energy and unfavorable thermodynamics. Herein, an efficient metal-free strategy that enables direct deoxygenation of alcohols has been developed for the first time, with hydrazine as the reductant induced by light. This protocol features mild reaction conditions, excellent functional group tolerance, and abundant and easily available starting materials, rendering selective deoxygenation of a variety of 1° and 2° alcohols, vicinal diols, and β-1 and even β-O-4 models of natural wood lignin. This strategy is also highlighted by its “traceless” and non-toxic by-products N2 and H2, as readily escapable gases. Mechanistic studies demonstrated dimethyl sulfide being a key intermediate in this transformation. Metal-free direct deoxygenation of alcohols enabled by light Traceless non-toxic N2 and H2 as by-products Broad substrate scope and wide functional group compatibility Converting lignin models into simple aromatics
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Affiliation(s)
- Dawei Cao
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada; Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology and Electron Microscopy Centre, Lanzhou University, Lanzhou 730000, P. R. China; The State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Zhangpei Chen
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada
| | - Leiyang Lv
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada
| | - Huiying Zeng
- The State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yong Peng
- Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology and Electron Microscopy Centre, Lanzhou University, Lanzhou 730000, P. R. China
| | - Chao-Jun Li
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada.
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18
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Luo MJ, Li Y, Ouyang XH, Li JH, He DL. Electrochemical dehydrogenative cross-coupling of two anilines: facile synthesis of unsymmetrical biaryls. Chem Commun (Camb) 2020; 56:2707-2710. [DOI: 10.1039/c9cc09879h] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New ortho/para-selective dehydrogenative cross-coupling of aryl amines for producing biaryls and incorporating pharmacophores is depicted.
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Affiliation(s)
- Mu-Jia Luo
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- Hunan University
- Changsha 410082
- China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
| | - Yang Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- Hunan University
- Changsha 410082
- China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
| | - Xuan-Hui Ouyang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
- Nanchang Hangkong University
- Nanchang 330063
- China
| | - Jin-Heng Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- Hunan University
- Changsha 410082
- China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
| | - De-Liang He
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- Hunan University
- Changsha 410082
- China
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19
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Saptal VB, Wang R, Park S. Recent advances in transition metal-free catalytic hydroelementation (E = B, Si, Ge, and Sn) of alkynes. RSC Adv 2020; 10:43539-43565. [PMID: 35519696 PMCID: PMC9058465 DOI: 10.1039/d0ra07768b] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 11/15/2020] [Indexed: 12/21/2022] Open
Abstract
This review describes the recent advances in the transition metal-free hydroelementation of alkynes with various metalloid hydrides.
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Affiliation(s)
- Vitthal B. Saptal
- Department of Chemistry
- Guangdong Technion Israel Institute of Technology
- China
| | - Ruibin Wang
- Department of Chemistry
- Guangdong Technion Israel Institute of Technology
- China
| | - Sehoon Park
- Department of Chemistry
- Guangdong Technion Israel Institute of Technology
- China
- Technion-Israel Institute of Technology
- 32000 Haifa
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20
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Bosque I, Chinchilla R, Gonzalez-Gomez JC, Guijarro D, Alonso F. Cross-dehydrogenative coupling involving benzylic and allylic C–H bonds. Org Chem Front 2020. [DOI: 10.1039/d0qo00587h] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Benzylic and allylic C–H bonds are coupled with C(sp)–H, C(sp2)–H and C(sp3)–H bonds in a straightforward and high atom-economic manner.
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Affiliation(s)
- Irene Bosque
- Instituto de Síntesis Orgánica and Departamento de Química Orgánica
- Facultad de Ciencias
- Universidad de Alicante
- 03080 Alicante
- Spain
| | - Rafael Chinchilla
- Instituto de Síntesis Orgánica and Departamento de Química Orgánica
- Facultad de Ciencias
- Universidad de Alicante
- 03080 Alicante
- Spain
| | - Jose C. Gonzalez-Gomez
- Instituto de Síntesis Orgánica and Departamento de Química Orgánica
- Facultad de Ciencias
- Universidad de Alicante
- 03080 Alicante
- Spain
| | - David Guijarro
- Instituto de Síntesis Orgánica and Departamento de Química Orgánica
- Facultad de Ciencias
- Universidad de Alicante
- 03080 Alicante
- Spain
| | - Francisco Alonso
- Instituto de Síntesis Orgánica and Departamento de Química Orgánica
- Facultad de Ciencias
- Universidad de Alicante
- 03080 Alicante
- Spain
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21
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Sharma S, Dutta NB, Bhuyan M, Das B, Baishya G. tert-Butylhydroperoxide (TBHP) mediated oxidative cross-dehydrogenative coupling of quinoxalin-2(1 H)-ones with 4-hydroxycoumarins, 4-hydroxy-6-methyl-2-pyrone and 2-hydroxy-1,4-naphthoquinone under metal-free conditions. Org Biomol Chem 2020; 18:6537-6548. [PMID: 32789325 DOI: 10.1039/d0ob01304h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
We report an efficient and atom-economical method of C-3 functionalization of quinoxalin-2(1H)-ones with 4-hydroxycoumarins, 4-hydroxy-6-methyl-2-pyrone, and 2-hydroxy-1,4-naphthoquinone via the free radical cross-coupling pathway under metal-free conditions. tert-Butylhydroperoxide (TBHP) smoothly promotes the reaction furnishing the cross-dehydrogenative coupling (CDC) products in very good to excellent yields. The protocol neither uses any toxic reagents nor metal catalysts to carry out the reaction, and all the products have been obtained without column chromatography purification. Different radical trapping experiments with 2,2,6,6-tetramethylpiperidine-1-oxyl, butylated hydroxytoluene, and diphenyl ethylene confirm the involvement of radicals.
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Affiliation(s)
- Suraj Sharma
- Chemical Science & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat-785006, India. and Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh-201002, India
| | - Nibedita Baruah Dutta
- Chemical Science & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat-785006, India. and Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh-201002, India and Rain Forest Research Institute, Jorhat-785001, India
| | - Mayurakhi Bhuyan
- Chemical Science & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat-785006, India. and Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh-201002, India
| | - Babulal Das
- Department of Chemistry, Indian Institute of Technology Guwahati, India
| | - Gakul Baishya
- Chemical Science & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat-785006, India. and Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh-201002, India
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22
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Li Y, Rizvi SA, Hu D, Sun D, Gao A, Zhou Y, Li J, Jiang X. Selective Late‐Stage Oxygenation of Sulfides with Ground‐State Oxygen by Uranyl Photocatalysis. Angew Chem Int Ed Engl 2019; 58:13499-13506. [DOI: 10.1002/anie.201906080] [Citation(s) in RCA: 116] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 07/08/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Yiming Li
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessDepartment of ChemistryEast China Normal University 3663 North Zhongshan Rd. Shanghai 200062 P. R. China
| | - S. Aal‐e‐Ali Rizvi
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessDepartment of ChemistryEast China Normal University 3663 North Zhongshan Rd. Shanghai 200062 P. R. China
| | - Deqing Hu
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessDepartment of ChemistryEast China Normal University 3663 North Zhongshan Rd. Shanghai 200062 P. R. China
| | - Danwen Sun
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessDepartment of ChemistryEast China Normal University 3663 North Zhongshan Rd. Shanghai 200062 P. R. China
| | - Anhui Gao
- National Center for Drug ScreeningLaboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of Sciences Shanghai 201203 P. R. China
| | - Yubo Zhou
- National Center for Drug ScreeningLaboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of Sciences Shanghai 201203 P. R. China
| | - Jia Li
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessDepartment of ChemistryEast China Normal University 3663 North Zhongshan Rd. Shanghai 200062 P. R. China
- National Center for Drug ScreeningLaboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of Sciences Shanghai 201203 P. R. China
| | - Xuefeng Jiang
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessDepartment of ChemistryEast China Normal University 3663 North Zhongshan Rd. Shanghai 200062 P. R. China
- State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryChinese Academy of Sciences Shanghai P. R. China
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23
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Xie LG, Rogers J, Anastasiou I, Leitch JA, Dixon DJ. Iridium-Catalyzed Reductive Allylation of Esters. Org Lett 2019; 21:6663-6667. [PMID: 31397155 DOI: 10.1021/acs.orglett.9b02119] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The catalytic reductive transformation of carboxylic esters into α-branched ethers is described. The procedure pivots on the chemoselective iridium-catalyzed hydrosilylation of ester and lactone functionality to afford a silyl acetal intermediate. Upon treatment with a Lewis acid, these hemilabile intermediates dissociate to form reactive oxocarbenium ions, which can be intercepted by allyltributyltin nucleophiles, resulting in the formation of valuable α-branched alkyl-alkyl ether derivatives. This reductive allylation procedure was found to be amenable to a range of carboxylic ester starting materials, and good chemoselectivity for ethyl over tert-butyl esters was demonstrated. Furthermore, downstream synthetic manipulation of α-amino acid-derived products led to the efficient formation of pyrrolidine, piperidine, and azepane frameworks.
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Affiliation(s)
- Lan-Gui Xie
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Jack Rogers
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Ioannis Anastasiou
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Jamie A Leitch
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Darren J Dixon
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
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24
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Huang CY, Kang H, Li J, Li CJ. En Route to Intermolecular Cross-Dehydrogenative Coupling Reactions. J Org Chem 2019; 84:12705-12721. [DOI: 10.1021/acs.joc.9b01704] [Citation(s) in RCA: 143] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Chia-Yu Huang
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Hyotaik Kang
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Jianbin Li
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Chao-Jun Li
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
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25
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Li Y, Rizvi SA, Hu D, Sun D, Gao A, Zhou Y, Li J, Jiang X. Selective Late‐Stage Oxygenation of Sulfides with Ground‐State Oxygen by Uranyl Photocatalysis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906080] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yiming Li
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessDepartment of ChemistryEast China Normal University 3663 North Zhongshan Rd. Shanghai 200062 P. R. China
| | - S. Aal‐e‐Ali Rizvi
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessDepartment of ChemistryEast China Normal University 3663 North Zhongshan Rd. Shanghai 200062 P. R. China
| | - Deqing Hu
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessDepartment of ChemistryEast China Normal University 3663 North Zhongshan Rd. Shanghai 200062 P. R. China
| | - Danwen Sun
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessDepartment of ChemistryEast China Normal University 3663 North Zhongshan Rd. Shanghai 200062 P. R. China
| | - Anhui Gao
- National Center for Drug ScreeningLaboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of Sciences Shanghai 201203 P. R. China
| | - Yubo Zhou
- National Center for Drug ScreeningLaboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of Sciences Shanghai 201203 P. R. China
| | - Jia Li
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessDepartment of ChemistryEast China Normal University 3663 North Zhongshan Rd. Shanghai 200062 P. R. China
- National Center for Drug ScreeningLaboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of Sciences Shanghai 201203 P. R. China
| | - Xuefeng Jiang
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessDepartment of ChemistryEast China Normal University 3663 North Zhongshan Rd. Shanghai 200062 P. R. China
- State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryChinese Academy of Sciences Shanghai P. R. China
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26
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Bi HY, Du M, Pan CX, Xiao Y, Su GF, Mo DL. Nickel(II)-Catalyzed [5 + 1] Annulation of 2-Carbonyl-1-propargylindoles with Hydroxylamine To Synthesize Pyrazino[1,2- a]indole-2-oxides in Water. J Org Chem 2019; 84:9859-9868. [PMID: 31347845 DOI: 10.1021/acs.joc.9b00784] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
An atom-economical and practical method for the efficient synthesis of various pyrazino[1,2-a]indole-2-oxides was developed through a nickel(II)-catalyzed [5 + 1] annulation of 2-carbonyl-1-propargylindoles with hydroxylamine in water without using an organic solvent. The reaction involved an initial condensation of 2-carbonyl-1-propargylindoles with hydroxylamine to afford oxime intermediates, which then underwent a nickel(II)-catalyzed 6-exo-dig cyclization. Preliminary studies showed that (n-Bu)4NI served as a phase transfer catalyst and promoted the formation of active nickel(II) species. More importantly, the nickel(II) salt and phase transfer catalyst-in-water could be recycled seven times, and a gram scalable product was easily obtained in good yields through a filtration and washing protocol.
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Affiliation(s)
- Hong-Yan Bi
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry & Pharmaceutical Sciences , Guangxi Normal University , 15 Yu Cai Road , Guilin 541004 , China
| | - Min Du
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry & Pharmaceutical Sciences , Guangxi Normal University , 15 Yu Cai Road , Guilin 541004 , China
| | - Cheng-Xue Pan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry & Pharmaceutical Sciences , Guangxi Normal University , 15 Yu Cai Road , Guilin 541004 , China
| | - Yuhong Xiao
- School of Chemistry and Chemical Engineering , Hunan University of Science and Technology , Xiangtan 411201 , P. R. China
| | - Gui-Fa Su
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry & Pharmaceutical Sciences , Guangxi Normal University , 15 Yu Cai Road , Guilin 541004 , China
| | - Dong-Liang Mo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry & Pharmaceutical Sciences , Guangxi Normal University , 15 Yu Cai Road , Guilin 541004 , China
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27
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Bal A, Maiti S, Mal P. Iodine(III)-Enabled Distal C–H Functionalization of Biarylsulfonanilides. J Org Chem 2018; 83:11278-11287. [DOI: 10.1021/acs.joc.8b01857] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Ankita Bal
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India
| | - Saikat Maiti
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India
| | - Prasenjit Mal
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India
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28
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Alam MT, Maiti S, Mal P. An Intramolecular C(sp2
)-H Amidation Using N
-Iodosuccinimide. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800688] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Md Toufique Alam
- School of Chemical Sciences; National Institute of Science Education and Research (NISER); Homi Bhabha National Institute (HBNI); 752050 Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni Khurda District Odisha India
| | - Saikat Maiti
- School of Chemical Sciences; National Institute of Science Education and Research (NISER); Homi Bhabha National Institute (HBNI); 752050 Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni Khurda District Odisha India
| | - Prasenjit Mal
- School of Chemical Sciences; National Institute of Science Education and Research (NISER); Homi Bhabha National Institute (HBNI); 752050 Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni Khurda District Odisha India
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29
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Khrizanforov M, Strekalova S, Khrizanforova V, Dobrynin A, Kholin K, Gryaznova T, Grinenko V, Gubaidullin A, Kadirov MK, Budnikova Y. Cobalt-Catalyzed Green Cross-Dehydrogenative C(sp2)-H/P-H Coupling Reactions. Top Catal 2018. [DOI: 10.1007/s11244-018-1014-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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30
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Maiti S, Bose A, Mal P. Oxidative N-Arylation for Carbazole Synthesis by C–C Bond Activation. J Org Chem 2018; 83:8127-8138. [DOI: 10.1021/acs.joc.8b00921] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Saikat Maiti
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, P.O. Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India
| | - Anima Bose
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, P.O. Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India
| | - Prasenjit Mal
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, P.O. Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India
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31
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Maiti S, Mal P. Soft–Hard Acid/Base-Controlled, Oxidative, N-Selective Arylation of Sulfonanilides via a Nitrenium Ion. J Org Chem 2018; 83:1340-1347. [DOI: 10.1021/acs.joc.7b02841] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Saikat Maiti
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India
| | - Prasenjit Mal
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India
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32
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Bauer JO, Chakraborty S, Milstein D. Manganese-Catalyzed Direct Deoxygenation of Primary Alcohols. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01729] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Jonathan O. Bauer
- Department of Organic Chemistry, The Weizmann Institute of Science, 76100 Rehovot, Israel
| | - Subrata Chakraborty
- Department of Organic Chemistry, The Weizmann Institute of Science, 76100 Rehovot, Israel
| | - David Milstein
- Department of Organic Chemistry, The Weizmann Institute of Science, 76100 Rehovot, Israel
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33
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Mishra AK, Verma A, Biswas S. Nucleophilic ipso-Substitution of Aryl Methyl Ethers through Aryl C–OMe Bond Cleavage; Access to Functionalized Bisthiophenes. J Org Chem 2017; 82:3403-3410. [DOI: 10.1021/acs.joc.6b02701] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Abhishek Kumar Mishra
- Division
of Molecular Synthesis and Drug Discovery, Centre of Bio-Medical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, India
| | - Ajay Verma
- Division
of NMR and Metabolomics, Centre of Bio-Medical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, India
| | - Srijit Biswas
- Division
of Molecular Synthesis and Drug Discovery, Centre of Bio-Medical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, India
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34
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Chen P, Sun Y, Wu Y, Liu LL, Zhu J, Zhao Y. A theoretical study on the mechanism of ruthenium(ii)-catalyzed phosphoryl-directed ortho-selective C–H bond activations: the phosphoryl hydroxy group triggered Ru(ii)/Ru(0) catalytic cycle. Org Chem Front 2017. [DOI: 10.1039/c7qo00240h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A theoretical study on the mechanism of ruthenium(ii)-catalyzed phosphoryl-directed ortho-selective C–H bond activations has been reported.
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Affiliation(s)
- Peng Chen
- Department of Chemical Biology
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Key Laboratory for Chemical Biology of Fujian Province
- Xiamen University
| | - Ying Sun
- Department of Chemical Biology
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Key Laboratory for Chemical Biology of Fujian Province
- Xiamen University
| | - Yile Wu
- Department of Chemical Biology
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Key Laboratory for Chemical Biology of Fujian Province
- Xiamen University
| | - Liu Leo Liu
- Department of Chemical Biology
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Key Laboratory for Chemical Biology of Fujian Province
- Xiamen University
| | - Jun Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- China
| | - Yufen Zhao
- Department of Chemical Biology
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Key Laboratory for Chemical Biology of Fujian Province
- Xiamen University
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35
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Liu LL, Chen P, Sun Y, Wu Y, Chen S, Zhu J, Zhao Y. Mechanism of Nickel-Catalyzed Selective C-N Bond Activation in Suzuki-Miyaura Cross-Coupling of Amides: A Theoretical Investigation. J Org Chem 2016; 81:11686-11696. [PMID: 27809510 DOI: 10.1021/acs.joc.6b02093] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In textbooks, the low reactivity of amides is attributed to the strong resonance stability. However, Garg and co-workers recently reported the Ni-catalyzed activation of robust amide C-N bonds, leading to conversions of amides into esters, ketones, and other amides with high selectivity. Among them, the Ni-catalyzed Suzuki-Miyaura coupling (SMC) of N-benzyl-N-tert-butoxycarbonyl (N-Bn-N-Boc) amides with pinacolatoboronate (PhBpin) was performed in the presence of K3PO4 and water. Water significantly enhanced the reaction. With the aid of density functional theory (DFT) calculations, the present study explored the mechanism of the aforementioned SMC reaction as well as analyzed the weakening of amide C-N bond by N-functionalization. The most favorable pathway includes four basic steps: oxidative addition, protonation, transmetalation, and reductive elimination. Comparing the base- and water-free process, the transmetalation step with the help of K3PO4 and water is significantly more facile. Water efficiently protonates the basic N(Boc) (Bn) group to form a neutral HN(Boc) (Bn), which is easily removed. The transmetalation step is the rate-determining step with an energy barrier of 25.6 kcal/mol. Further, a DFT prediction was carried out to investigate the full catalytic cycle of a cyclic (amino) (aryl)carbene in the Ni-catalyzed SMC of amides, which provided clues for further design of catalysts.
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Affiliation(s)
- Liu Leo Liu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Key Laboratory for Chemical Biology of Fujian Province and ‡State Key Laboratory of Physical Chemistry of Solid Surfaces and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, 361005 Fujian, China
| | - Peng Chen
- Department of Chemistry, College of Chemistry and Chemical Engineering, Key Laboratory for Chemical Biology of Fujian Province and ‡State Key Laboratory of Physical Chemistry of Solid Surfaces and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, 361005 Fujian, China
| | - Ying Sun
- Department of Chemistry, College of Chemistry and Chemical Engineering, Key Laboratory for Chemical Biology of Fujian Province and ‡State Key Laboratory of Physical Chemistry of Solid Surfaces and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, 361005 Fujian, China
| | - Yile Wu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Key Laboratory for Chemical Biology of Fujian Province and ‡State Key Laboratory of Physical Chemistry of Solid Surfaces and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, 361005 Fujian, China
| | - Su Chen
- Department of Chemistry, College of Chemistry and Chemical Engineering, Key Laboratory for Chemical Biology of Fujian Province and ‡State Key Laboratory of Physical Chemistry of Solid Surfaces and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, 361005 Fujian, China
| | - Jun Zhu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Key Laboratory for Chemical Biology of Fujian Province and ‡State Key Laboratory of Physical Chemistry of Solid Surfaces and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, 361005 Fujian, China
| | - Yufen Zhao
- Department of Chemistry, College of Chemistry and Chemical Engineering, Key Laboratory for Chemical Biology of Fujian Province and ‡State Key Laboratory of Physical Chemistry of Solid Surfaces and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, 361005 Fujian, China
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36
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Liu W, Chen N, Yang X, Li L, Li CJ. Dehydrative condensation of carbonyls with non-acidic methylenes enabled by light: synthesis of benzofurans. Chem Commun (Camb) 2016; 52:13120-13123. [DOI: 10.1039/c6cc07626b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Condensation of carbonyls with non-acidic methylenes such as those adjacent to heteroatoms and allylic types to generate CC bonds is challenging but highly desirable.
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Affiliation(s)
- Wenbo Liu
- Department of Chemistry and FQRNT Center for Green Chemistry and Catalysis
- McGill University
- Montreal
- Canada
| | - Ning Chen
- Department of Chemistry and FQRNT Center for Green Chemistry and Catalysis
- McGill University
- Montreal
- Canada
| | - Xiaobo Yang
- Department of Chemistry and FQRNT Center for Green Chemistry and Catalysis
- McGill University
- Montreal
- Canada
| | - Lu Li
- Department of Chemistry and FQRNT Center for Green Chemistry and Catalysis
- McGill University
- Montreal
- Canada
| | - Chao-Jun Li
- Department of Chemistry and FQRNT Center for Green Chemistry and Catalysis
- McGill University
- Montreal
- Canada
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