1
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Yamada K, Cheung KPS, Gevorgyan V. General Regio- and Diastereoselective Allylic C-H Oxygenation of Internal Alkenes. J Am Chem Soc 2024; 146:18218-18223. [PMID: 38922638 DOI: 10.1021/jacs.4c06421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2024]
Abstract
Branched allylic esters and carboxylates are fundamental motifs prevalent in natural products and drug molecules. The direct allylic C-H oxygenation of internal alkenes represents one of the most straightforward approaches, bypassing the requirement for an allylic leaving group as in the classical Tsuji-Trost reaction. However, current methods suffer from limited scope─often accompanied by selectivity issues─thus hampering further development. Herein we report a photocatalytic platform as a general solution to these problems, enabling the coupling of diverse internal alkenes with carboxylic acids, alcohols, and other O-nucleophiles, typically in a highly regio- and diastereoselective manner.
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Affiliation(s)
- Kyohei Yamada
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080-3021, United States
| | - Kelvin Pak Shing Cheung
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080-3021, United States
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080-3021, United States
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2
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McCullough TM, Choudhary V, Akey DL, Skiba MA, Bernard SM, Kittendorf JD, Schmidt JJ, Sherman DH, Smith JL. Substrate Trapping in Polyketide Synthase Thioesterase Domains: Structural Basis for Macrolactone Formation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.20.599880. [PMID: 38948807 PMCID: PMC11213023 DOI: 10.1101/2024.06.20.599880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
Emerging antibiotic resistance requires continual improvement in the arsenal of antimicrobial drugs, especially the critical macrolide antibiotics. Formation of the macrolactone scaffold of these polyketide natural products is catalyzed by a modular polyketide synthase (PKS) thioesterase (TE). The TE accepts a linear polyketide substrate from the termina PKS acyl carrier protein to generate an acyl-enzyme adduct that is resolved by attack of a substrate hydroxyl group to form the macrolactone. Our limited mechanistic understanding of TE selectivity for a substrate nucleophile and/or water has hampered development of TEs as biocatalysts that accommodate a variety of natural and non-natural substrates. To understand how TEs direct the substrate nucleophile for macrolactone formation, acyl-enzyme intermediates were trapped as stable amides by substituting the natural serine OH with an amino group. Incorporation of the unnatural amino acid, 1,3-diaminopropionic acid (DAP), was tested with five PKS TEs. DAP-modified TEs (TE DAP ) from the pikromycin and erythromycin pathways were purified and tested with six full-length polyketide intermediates from three pathways. The erythromycin TE had permissive substrate selectivity, whereas the pikromycin TE was selective for its native hexaketide and heptaketide substrates. In a crystal structure of a native substrate trapped in pikromycin TE DAP , the linear heptaketide was curled in the active site with the nucleophilic hydroxyl group positioned 4 Å from the amide-enzyme linkage. The curled heptaketide displayed remarkable shape complementarity with the TE acyl cavity. The strikingly different shapes of acyl cavities in TEs of known structure, including those reported here for juvenimicin, tylosin and fluvirucin biosynthesis, provide new insights to facilitate TE engineering and optimization.
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3
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Zhou J, Zhang L, Wang Y, Song W, Huang Y, Mu Y, Schmitz W, Zhang SY, Lin H, Chen HZ, Ye F, Zhang L. The Molecular Basis of Catalysis by SDR Family Members Ketoacyl-ACP Reductase FabG and Enoyl-ACP Reductase FabI in Type-II Fatty Acid Biosynthesis. Angew Chem Int Ed Engl 2023; 62:e202313109. [PMID: 37779101 DOI: 10.1002/anie.202313109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 09/24/2023] [Accepted: 09/26/2023] [Indexed: 10/03/2023]
Abstract
The short-chain dehydrogenase/reductase (SDR) superfamily members acyl-ACP reductases FabG and FabI are indispensable core enzymatic modules and catalytic orientation controllers in type-II fatty acid biosynthesis. Herein, we report their distinct substrate allosteric recognition and enantioselective reduction mechanisms. FabG achieves allosteric regulation of ACP and NADPH through ACP binding across two adjacent FabG monomers, while FabI follows an irreversible compulsory order of substrate binding in that NADH binding must precede that of ACP on a discrete FabI monomer. Moreover, FabG and FabI utilize a backdoor residue Phe187 or a "rheostat" α8 helix for acyl chain length selection, and their corresponding triad residues Ser142 or Tyr145 recognize the keto- or enoyl-acyl substrates, respectively, facilitating initiation of nucleophilic attack by NAD(P)H. The other two triad residues (Tyr and Lys) mediate subsequent proton transfer and (R)-3-hydroxyacyl- or saturated acyl-ACP production.
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Affiliation(s)
- Jiashen Zhou
- Department of Pharmacology and Chemical Biology, State Key Laboratory of Systems Medicine for Cancer, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Lin Zhang
- Department of Pharmacology and Chemical Biology, State Key Laboratory of Systems Medicine for Cancer, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Yiran Wang
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 201203, Shanghai, China
| | - Wenyan Song
- Department of Pharmacology and Chemical Biology, State Key Laboratory of Systems Medicine for Cancer, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Yuzhou Huang
- Department of Pharmacology and Chemical Biology, State Key Laboratory of Systems Medicine for Cancer, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Yajuan Mu
- Department of Pharmacology and Chemical Biology, State Key Laboratory of Systems Medicine for Cancer, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Werner Schmitz
- Department of Biochemistry and Molecular Biology, University of Würzburg, Würzburg, 97074, Germany
| | - Shu-Yu Zhang
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Houwen Lin
- Research Centre for Marine Drugs, State Key Laboratory of Oncogene and Related Genes, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen, 518055, China
| | - Hong-Zhuan Chen
- Institute of Interdisciplinary Integrative Biomedical Research, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Fei Ye
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, China
| | - Liang Zhang
- Department of Pharmacology and Chemical Biology, State Key Laboratory of Systems Medicine for Cancer, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
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4
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Sinha SK, Ghosh P, Jain S, Maiti S, Al-Thabati SA, Alshehri AA, Mokhtar M, Maiti D. Transition-metal catalyzed C-H activation as a means of synthesizing complex natural products. Chem Soc Rev 2023; 52:7461-7503. [PMID: 37811747 DOI: 10.1039/d3cs00282a] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Over the past few decades, the advent of C-H activation has led to a rethink among chemists about the synthetic strategies employed for multi-step transformations. Indeed, deploying innovative and masterful tricks against the numerous classical organic transformations has been the need of the hour. Despite this, the immense importance of C-H activation remains unfulfilled unless the methodology can be deployed for large-scale industrial processes and towards the concise, step-economic synthesis of prodigious natural products and pharmaceutical drugs. Lately, the growing potential of C-H activation methodology has indeed driven the pioneers of synthetic organic chemists into finding more efficient methods to accelerate the synthesis of such complex molecular scaffolds. This review aims to draw a general overview of the various C-H activation procedures that have been adopted for synthesizing these vast majority of structurally complicated natural products. Our objective lies in drawing a complete picture and taking the readers through the synthesis of a series of such complex organic compounds by simplified techniques, making it step-economic on a larger scale and thus instigating the readers to trigger the use of such methodology and uncover new, unique patterns for future synthesis of such natural products.
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Affiliation(s)
- Soumya Kumar Sinha
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Pintu Ghosh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Shubhanshu Jain
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Siddhartha Maiti
- School of Biosciences, Engineering and Technology, VIT Bhopal University, Kothrikalan, Sehore, Madhya Pradesh - 466114, India
| | - Shaeel A Al-Thabati
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Abdulmohsen Ali Alshehri
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Mohamed Mokhtar
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
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5
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Chambers RK, Weaver JD, Kim J, Hoar JL, Krska SW, White MC. A preparative small-molecule mimic of liver CYP450 enzymes in the aliphatic C-H oxidation of carbocyclic N-heterocycles. Proc Natl Acad Sci U S A 2023; 120:e2300315120. [PMID: 37428920 PMCID: PMC10629554 DOI: 10.1073/pnas.2300315120] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 05/15/2023] [Indexed: 07/12/2023] Open
Abstract
An emerging trend in small-molecule pharmaceuticals, generally composed of nitrogen heterocycles (N-heterocycles), is the incorporation of aliphatic fragments. Derivatization of the aliphatic fragments to improve drug properties or identify metabolites often requires lengthy de novo syntheses. Cytochrome P450 (CYP450) enzymes are capable of direct site- and chemo-selective oxidation of a broad range of substrates but are not preparative. A chemoinformatic analysis underscored limited structural diversity of N-heterocyclic substrates oxidized using chemical methods relative to pharmaceutical chemical space. Here, we describe a preparative chemical method for direct aliphatic oxidation that tolerates a wide range of nitrogen functionality (chemoselective) and matches the site of oxidation (site-selective) of liver CYP450 enzymes. Commercial small-molecule catalyst Mn(CF3-PDP) selectively effects direct methylene oxidation in compounds bearing 25 distinct heterocycles including 14 out of 27 of the most frequent N-heterocycles found in U.S. Food and Drug Administration (FDA)-approved drugs. Mn(CF3-PDP) oxidations of carbocyclic bioisostere drug candidates (for example, HCV NS5B and COX-2 inhibitors including valdecoxib and celecoxib derivatives) and precursors of antipsychotic drugs blonanserin, buspirone, and tiospirone and the fungicide penconazole are demonstrated to match the major site of aliphatic metabolism obtained with liver microsomes. Oxidations are demonstrated at low Mn(CF3-PDP) loadings (2.5 to 5 mol%) on gram scales of substrate to furnish preparative amounts of oxidized products. A chemoinformatic analysis supports that Mn(CF3-PDP) significantly expands the pharmaceutical chemical space accessible to small-molecule C-H oxidation catalysis.
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Affiliation(s)
- Rachel K. Chambers
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL61801
| | - Jacob D. Weaver
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL61801
| | - Jinho Kim
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL61801
| | - Jason L. Hoar
- Department of Discovery Chemistry, Merck & Co., Inc., Rahway, NJ07065
| | - Shane W. Krska
- Department of Discovery Chemistry, Merck & Co., Inc., Rahway, NJ07065
| | - M. Christina White
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL61801
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6
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Lin X, Li N, Zhu C, Sun B. An Efficient Synthesis of Rivaroxaban. ChemistrySelect 2023. [DOI: 10.1002/slct.202204644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Xiaoyu Lin
- School of Pharmaceutical Sciences Nanjing Tech University 30 South Puzhu Road Nanjing 210000 China
| | - Nanlian Li
- School of Pharmaceutical Sciences Nanjing Tech University 30 South Puzhu Road Nanjing 210000 China
| | - Chenlong Zhu
- School of Pharmaceutical Sciences Nanjing Tech University 30 South Puzhu Road Nanjing 210000 China
| | - Bingfeng Sun
- School of Pharmaceutical Sciences Nanjing Tech University 30 South Puzhu Road Nanjing 210000 China
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7
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Cheng H, Yu C, Wang H, Liu X, Ma L, Lai F. Macrolactonization of methyl 15-hydroxypentadecanoate to cyclopentadecanolide using KF-La/γ-Al 2O 3 catalyst. ROYAL SOCIETY OPEN SCIENCE 2022; 9:211479. [PMID: 36117871 PMCID: PMC9459669 DOI: 10.1098/rsos.211479] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 05/24/2022] [Indexed: 06/15/2023]
Abstract
It has been a challenge to synthesize macrolide musk in excellent yields with high purity. KF-La/γ-Al2O3 catalyst was prepared from a highly basic mesoporous framework using a mild method. The prepared KF-La/γ-Al2O3 catalyst was employed for the synthesis of cyclopentadecanolide from methyl 15-hydroxypentadecanoate. The morphology and structure of prepared catalysts were characterized using XRD, TG-DTG, SEM, EDX, TEM, BET and CO2-TPD. The results revealed that the K3AlF6 and LaOF are produced on the surface of KF-La/γ-Al2O3, and LaO can promote the dispersion of KF on the surface of Al2O3. Catalysts pore size main distribution ranges between 10 and 30 nm, the maximum CO2 desorption temperature is 715°C when the La loading is 25%. Because F- ion has a higher electronegativity than O2- ion, the KF-promoted metal oxide (Al2O3 or/and La2O3) contained more strong basic sites, compared with that of the corresponding metal oxide. The yield of cyclopentadecanolide obtained at 0.5 g KF-25La/γ-Al2O3 catalyst and a reaction temperature of 190°C for 7 h were 58.50%, and the content after reactive distillation is 98.8%. The KF-La/γ-Al2O3 catalyst has a larger pore size and basic strength, which is more conducive to the macrolactonization of long-chain hydroxy ester.
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Affiliation(s)
- Haijun Cheng
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning Guangxi 530004, People's Republic of China
| | - Chang Yu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning Guangxi 530004, People's Republic of China
| | - Hongyun Wang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning Guangxi 530004, People's Republic of China
| | - Xiongmin Liu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning Guangxi 530004, People's Republic of China
| | - Li Ma
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning Guangxi 530004, People's Republic of China
| | - Fang Lai
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning Guangxi 530004, People's Republic of China
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8
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Humne VT, Ghom MH, Naykode MS, Dangat Y, Vanka K, Lokhande P. Direct oxidation of bromo-derived Fischer-Borsche oxo-ring using molecular iodine with combined experimental and computational study. Org Biomol Chem 2022; 20:5726-5729. [PMID: 35848368 DOI: 10.1039/d2ob00793b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A direct oxidation of the bromo-derived Fischer-Borsche oxo-ring leading to carbazolequinone has been developed by using molecular iodine. This unprecedented transformation has been used for the modular synthesis of the anti-cardiotonic agent murrayaquinone. Furthermore, the present method has been generalized to a broad range of functional groups, with good to excellent yield.
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Affiliation(s)
- Vivek T Humne
- Department of Chemistry, Shri. R. R. Lahoti Science College, Morshi, MS, India.
| | - Monica H Ghom
- Department of Chemistry, Savitribai Phule Pune University, Pune, MS, India
| | - Mahavir S Naykode
- Department of Chemistry, Savitribai Phule Pune University, Pune, MS, India
| | - Yuvraj Dangat
- Division of Physical Chemistry, CSIR-National Chemical Laboratory, Pune, MS, India
| | - Kumar Vanka
- Division of Physical Chemistry, CSIR-National Chemical Laboratory, Pune, MS, India
| | - Pradeep Lokhande
- Department of Chemistry, Savitribai Phule Pune University, Pune, MS, India
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9
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Non-chelation-assisted Pd-catalysed novel sp3 C H/sp2 C H intermolecular oxidative coupling reaction: one-pot formation of new 5‑benzyl fluorenone. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Das KM, Pal A, Adarsh NN, Thakur A. A novel quinoline-based NNN-pincer Cu(II) complex as a superior catalyst for oxidative esterification of allylic C(sp 3)-H bonds. Org Biomol Chem 2022; 20:3540-3549. [PMID: 35393991 DOI: 10.1039/d2ob00220e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report for the first time that the quinoline-based NNN-pincer Cu(II) complex acts as an air stable superior catalyst for the oxidative cross-coupling of the allyl sp3 C-H bond with an acid for the synthesis of allyl esters in a homogeneous system at ambient temperature. The synthesized catalyst, 1, has been well characterized by various analytical techniques (HRMS, single crystal X-ray diffraction, CV, EPR, UV-vis spectroscopy) and showed excellent catalytic activity for the oxidative esterification of allylic C(sp3)-H bonds at 40 °C within a very short period of time (1 h) using only 1 mol% of the catalyst. A wide variety of aromatic allylic esters were synthesized in moderate to good yields, which could be extended to aliphatic allyl esters as well.
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Affiliation(s)
- Krishna Mohan Das
- Department of Chemistry, Jadavpur University, Kolkata-700032, India.
| | - Adwitiya Pal
- Department of Chemistry, Jadavpur University, Kolkata-700032, India.
| | - Nayarassery N Adarsh
- Chemistry and Biomolecular Science, Clarkson University, 8 Clarkson Ave., Potsdam, New York, 13699, USA
| | - Arunabha Thakur
- Department of Chemistry, Jadavpur University, Kolkata-700032, India.
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11
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Mupparapu N, Brewster L, Ostrom KF, Elshahawi SI. Late-Stage Chemoenzymatic Installation of Hydroxy-Bearing Allyl Moiety on the Indole Ring of Tryptophan-Containing Peptides. Chemistry 2022; 28:e202104614. [PMID: 35178791 PMCID: PMC9314954 DOI: 10.1002/chem.202104614] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Indexed: 01/08/2023]
Abstract
The late‐stage functionalization of indole‐ and tryptophan‐containing compounds with reactive moieties facilitates downstream diversification and leads to changes in their biological properties. Here, the synthesis of two hydroxy‐bearing allyl pyrophosphates is described. A chemoenzymatic method is demonstrated which uses a promiscuous indole prenyltransferase enzyme to install a dual reactive hydroxy‐bearing allyl moiety directly on the indole ring of tryptophan‐containing peptides. This is the first report of late‐stage indole modifications with this reactive group.
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Affiliation(s)
- Nagaraju Mupparapu
- Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy Rinker Health Science Campus, Irvine, CA 92618, USA
| | - Lauren Brewster
- Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy Rinker Health Science Campus, Irvine, CA 92618, USA
| | - Katrina F Ostrom
- Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy Rinker Health Science Campus, Irvine, CA 92618, USA
| | - Sherif I Elshahawi
- Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy Rinker Health Science Campus, Irvine, CA 92618, USA
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12
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Hu JL, Bauer F, Breit B. Ruthenium-Catalyzed Enantioselective Addition of Carboxylic Acids to Allenes. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03306] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jiang-Lin Hu
- Institut für Organische Chemie, Albert-Ludwigs-Universität 21, 79104 Freiburg, Germany
| | - Felix Bauer
- Institut für Organische Chemie, Albert-Ludwigs-Universität 21, 79104 Freiburg, Germany
| | - Bernhard Breit
- Institut für Organische Chemie, Albert-Ludwigs-Universität 21, 79104 Freiburg, Germany
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13
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Force G, Perfetto A, Mayer RJ, Ciofini I, Lebœuf D. Macrolactonization Reactions Driven by a Pentafluorobenzoyl Group**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Guillaume Force
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO) CNRS UMR 8182 Université Paris-Saclay Bâtiment 420 91405 Orsay France
| | - Anna Perfetto
- Chimie Paris-Tech PSL CNRS, Institute of Chemistry for Health and Life Science (I-CLeHS) Theoretical Chemistry and Modelling Group (CTM) 75005 Paris France
| | - Robert J. Mayer
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS) CNRS UMR 7006 Université de Strasbourg 8 allée Gaspard Monge 67000 Strasbourg France
| | - Ilaria Ciofini
- Chimie Paris-Tech PSL CNRS, Institute of Chemistry for Health and Life Science (I-CLeHS) Theoretical Chemistry and Modelling Group (CTM) 75005 Paris France
| | - David Lebœuf
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS) CNRS UMR 7006 Université de Strasbourg 8 allée Gaspard Monge 67000 Strasbourg France
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14
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Force G, Perfetto A, Mayer RJ, Ciofini I, Lebœuf D. Macrolactonization Reactions Driven by a Pentafluorobenzoyl Group*. Angew Chem Int Ed Engl 2021; 60:19843-19851. [PMID: 34213811 DOI: 10.1002/anie.202105882] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/16/2021] [Indexed: 11/08/2022]
Abstract
Macrolactones constitute a privileged class of natural and synthetic products with a broad range of applications in the fine chemicals and pharmaceutical industry. Despite all the progress made towards their synthesis, notably from seco-acids, a macrolactonization promoter system that is effective, selective, flexible, readily available, and, insofar as possible, compatible with manifold functional groups is still lacking. Herein, we describe a strategy that relies on the formation of a mixed anhydride incorporating a pentafluorophenyl group which, due to its high electronic activation enables a convenient access to macrolactones, macrodiolides and esters with a broad versatility. Kinetic studies and DFT computations were performed to rationalize the reactivity of the pentafluorophenyl group in macrolactonization reactions.
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Affiliation(s)
- Guillaume Force
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), CNRS UMR 8182, Université Paris-Saclay, Bâtiment 420, 91405, Orsay, France
| | - Anna Perfetto
- Chimie Paris-Tech, PSL, CNRS, Institute of Chemistry for Health and Life Science (I-CLeHS), Theoretical Chemistry and Modelling Group (CTM), 75005, Paris, France
| | - Robert J Mayer
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), CNRS UMR 7006, Université de Strasbourg, 8 allée Gaspard Monge, 67000, Strasbourg, France
| | - Ilaria Ciofini
- Chimie Paris-Tech, PSL, CNRS, Institute of Chemistry for Health and Life Science (I-CLeHS), Theoretical Chemistry and Modelling Group (CTM), 75005, Paris, France
| | - David Lebœuf
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), CNRS UMR 7006, Université de Strasbourg, 8 allée Gaspard Monge, 67000, Strasbourg, France
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15
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Yakovleva MP, Denisova KS, Vydrina VA, Tolstikov AG, Ishmuratov GY. Methods for Macrolactonization of Seco Acids in the Synthesis of Natural and Biologically Active Compounds. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2021. [DOI: 10.1134/s1070428021050018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Zheng K, Hong R. Total synthesis of LC-KA05, the proposed structure of LC-KA05-2, and 2,18-seco-lankacidinol B: A quest to revisit lankacidin biosynthesis. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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17
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Sundaravelu N, Sangeetha S, Sekar G. Metal-catalyzed C-S bond formation using sulfur surrogates. Org Biomol Chem 2021; 19:1459-1482. [PMID: 33528480 DOI: 10.1039/d0ob02320e] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Sulfur-containing compounds are present in a wide range of biologically important natural products, drugs, catalysts, and ligands and they have wide applications in material chemistry. Transition metal-catalyzed C-S bond-forming reactions have successfully overcome the obstacles associated with traditional organosulfur compound syntheses such as stoichiometric use of metal-catalysts, catalyst-poisoning and harsh reaction conditions. One of the key demands in metal-catalyzed C-S bond-forming reactions is the use of an appropriate sulfur source due to its odor and availability. The unpleasant odor of many organic sulfur sources might be one of the reasons for the metal-catalyzed C-S bond-forming reactions being less explored compared to other metal-catalyzed C-heteroatom bond-forming reactions. Hence, employing an appropriate sulfur surrogate in the synthesis of organosulfur compounds in metal-catalyzed reactions is still of prime interest for chemists. This review explores the recent advances in C-S bond formation using transition metal-catalyzed cross-coupling reactions and C-H bond functionalization using diverse and commercially available sulfur surrogates. Based on the different transition metal-catalysts, this review has been divided into three major classes namely (1) palladium-catalyzed C-S bond formation, (2) copper-catalyzed C-S bond formation, and (3) other metal-catalyzed C-S bond formation. This review is further arranged based on the different sulfur surrogates. Also, this review provides an insight into the growing opportunities in the construction of complex organosulfur scaffolds covering natural product synthesis and functional materials.
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Affiliation(s)
- Nallappan Sundaravelu
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India.
| | - Subramani Sangeetha
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India.
| | - Govindasamy Sekar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India.
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18
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Strategic evolution in transition metal-catalyzed directed C–H bond activation and future directions. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213683] [Citation(s) in RCA: 93] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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19
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Bunno Y, Tsukimawashi Y, Kojima M, Yoshino T, Matsunaga S. Metal-Containing Schiff Base/Sulfoxide Ligands for Pd(II)-Catalyzed Asymmetric Allylic C–H Aminations. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05261] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Youka Bunno
- Faculty of Pharmaceutical Science, Hokkaido University, Sapporo 060-0812, Japan
| | - Yuta Tsukimawashi
- Faculty of Pharmaceutical Science, Hokkaido University, Sapporo 060-0812, Japan
| | - Masahiro Kojima
- Faculty of Pharmaceutical Science, Hokkaido University, Sapporo 060-0812, Japan
| | - Tatsuhiko Yoshino
- Faculty of Pharmaceutical Science, Hokkaido University, Sapporo 060-0812, Japan
| | - Shigeki Matsunaga
- Faculty of Pharmaceutical Science, Hokkaido University, Sapporo 060-0812, Japan
- Global Station for Biosurfaces and Drug Discovery, Hokkaido University, Sapporo 060-0812, Japan
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20
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Li H, Pang J, Liu H, Zhao C, Li S, Wang H, Liu X. Sc(OTf) 3-Catalyzed 1,6-Conjugate Addition of Thiols to δ-CF 3- δ-aryl-disubstituted para-Quinone Methides: Efficient Construction of Diarylmethane Thioethers. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202103042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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21
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Deak N, Thillaye du Boullay O, Mallet‐Ladeira S, Moraru I, Madec D, Nemes G. Synthesis and Characterization of a Novel Bis‐Sulfoxide and Its Evaluation as a Ligand in p‐Block Chemistry. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000728] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Noémi Deak
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069) Université de Toulouse, CNRS 118 Route de Narbonne 31062 Toulouse France
- Facultatea de Chimie si Inginerie Chimica Universitatea Babes‐Bolyai str. Arany Janos, nr. 11 400028 Cluj‐Napoca Romania
| | - Olivier Thillaye du Boullay
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069) Université de Toulouse, CNRS 118 Route de Narbonne 31062 Toulouse France
| | - Sonia Mallet‐Ladeira
- Institut de Chimie de Toulouse, FR2599 Université Paul Sabatier, UPS 118 Route de Narbonne 31062 Toulouse France
| | - Ionuţ‐Tudor Moraru
- Facultatea de Chimie si Inginerie Chimica Universitatea Babes‐Bolyai str. Arany Janos, nr. 11 400028 Cluj‐Napoca Romania
| | - David Madec
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069) Université de Toulouse, CNRS 118 Route de Narbonne 31062 Toulouse France
| | - Gabriela Nemes
- Facultatea de Chimie si Inginerie Chimica Universitatea Babes‐Bolyai str. Arany Janos, nr. 11 400028 Cluj‐Napoca Romania
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22
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Suh SE, Chen SJ, Mandal M, Guzei IA, Cramer CJ, Stahl SS. Site-Selective Copper-Catalyzed Azidation of Benzylic C-H Bonds. J Am Chem Soc 2020; 142:11388-11393. [PMID: 32539355 PMCID: PMC7405889 DOI: 10.1021/jacs.0c05362] [Citation(s) in RCA: 93] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Site selectivity represents a key challenge for non-directed C-H functionalization, even when the C-H bond is intrinsically reactive. Here, we report a copper-catalyzed method for benzylic C-H azidation of diverse molecules. Experimental and density functional theory studies suggest the benzyl radical reacts with a CuII-azide species via a radical-polar crossover pathway. Comparison of this method with other C-H azidation methods highlights its unique site selectivity, and conversions of the benzyl azide products into amine, triazole, tetrazole, and pyrrole functional groups highlight the broad utility of this method for target molecule synthesis and medicinal chemistry.
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Affiliation(s)
- Sung-Eun Suh
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Si-Jie Chen
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Mukunda Mandal
- Department of Chemistry, Chemical Theory Center and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Ilia A. Guzei
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Christopher J. Cramer
- Department of Chemistry, Chemical Theory Center and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Shannon S. Stahl
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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23
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Sengupta S, Mehta G. Macrocyclization via C-H functionalization: a new paradigm in macrocycle synthesis. Org Biomol Chem 2020; 18:1851-1876. [PMID: 32101232 DOI: 10.1039/c9ob02765c] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The growing emphasis on macrocycles in engaging difficult therapeutic targets such as protein-protein interactions and GPCRs via preferential adaptation of bioactive and cell penetrating conformations has provided impetus to the search for de novo macrocyclization strategies that are efficient, chemically robust and amenable to diversity creation. An emerging macrocyclization paradigm based on the C-H activation logic, of particular promise in the macrocyclization of complex peptides, has added a new dimension to this pursuit, enabling efficacious access to macrocycles of various sizes and topologies with high atom and step economy. Significant achievements in macrocyclization methodologies and their applications in the synthesis of bioactive natural products and drug-like molecules, employing strategic variations of C-H activation are captured in this review. It is expected that this timely account will foster interest in newer ways of macrocycle construction among practitioners of organic synthesis and chemical biology to advance the field.
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Affiliation(s)
- Saumitra Sengupta
- School of Chemistry, University of Hyderabad, Gachibowli, Hyderabad-5000 046, Telengana, India.
| | - Goverdhan Mehta
- School of Chemistry, University of Hyderabad, Gachibowli, Hyderabad-5000 046, Telengana, India.
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24
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Tang L, Shang J, Song C, Yang R, Shang X, Mao W, Bao D, Tan Q. Untargeted Metabolite Profiling of Antimicrobial Compounds in the Brown Film of Lentinula edodes Mycelium via LC-MS/MS Analysis. ACS OMEGA 2020; 5:7567-7575. [PMID: 32280900 PMCID: PMC7144172 DOI: 10.1021/acsomega.0c00398] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 03/18/2020] [Indexed: 05/13/2023]
Abstract
The brown film (BF) of Lentinula edodes mycelium has been reported to exert biological activities during mushroom cultivation; however, to date, there is limited information on its chemical composition. In this study, untargeted metabolomics analysis was performed via liquid chromatography-mass spectrometry (LC-MS), and the results were used to screen the antimicrobial compounds. A total of 236 differential metabolites were found among the BF stages compared with the white hyphal stage. Among them, five important antimicrobial metabolites related to antimicrobial activities, namely, 6-deoxyerythronolide B, tanikolide, hydroxyanthraquinone, benzylideneacetone, and 9-OxooTrE, were present at high levels in the BF samples. The score plots of the principal component analysis indicated that the samples from four time points could be classified into two groups. This study provided a comprehensive profile of the antimicrobial compounds produced during BF formation and partly clarified the antibacterial and antifungal mechanism of the BF of L. edodes mycelium.
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Affiliation(s)
| | | | | | | | | | | | | | - Qi Tan
- . Phone/Fax: +86-21-6220-6780
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25
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Affiliation(s)
- Ming Yang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, Jiangxi P. R. China
| | - Xuewei Wang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, Jiangxi P. R. China
| | - Junfeng Zhao
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, Jiangxi P. R. China
- School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, Guangdong P. R. China
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26
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Chambers RK, Zhao J, Delaney CP, White MC. Chemoselective Tertiary C-H Hydroxylation for Late-Stage Functionalization with Mn(PDP)/Chloroacetic Acid Catalysis. Adv Synth Catal 2020; 362:417-423. [PMID: 32165875 DOI: 10.1002/adsc.201901472] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Aromatic and heterocyclic functionality are ubiquitous in pharmaceuticals. Herein, we disclose a new Mn(PDP)catalyst system using chloroacetic acid additive capable of chemoselectively oxidizing remote tertiary C(sp 3)-H bonds in the presence of a broad range of aromatic and heterocyclic moieties. Although catalyst loadings can be lowered to 0.1 mol% under a Mn(PDP)/acetic acid system for aromatic and non-basic nitrogen heterocycle substrates, the Mn(PDP)/chloroacetic acid system generally affords 10-15% higher isolated yields on these substrates and is uniquely effective for remote C(sp 3)-H hydroxylations in substrates housing basic nitrogen heterocycles. The demonstrated ability to perform Mn(PDP)/chloroacetic acid C(sp 3)-H oxidations in pharmaceutically relevant complex molecules on multi-gram scales will facilitate drug discovery processes via late-stage functionalization.
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Affiliation(s)
- Rachel K Chambers
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States.,These authors contributed equally to this work
| | - Jinpeng Zhao
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States.,These authors contributed equally to this work.,Current address: Corteva Agriscience, 9330 Zionsville Road, Indianapolis, Indiana, 46268
| | - Connor P Delaney
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - M Christina White
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
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27
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Beng TK, Shearer V, Davey R, Redman I. Site-selective, catalytic, and diastereoselective sp3 C–H hydroxylation and alkoxylation of vicinally functionalized lactams. RSC Adv 2020; 10:20264-20271. [PMID: 35520437 PMCID: PMC9054119 DOI: 10.1039/d0ra03726e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 05/19/2020] [Indexed: 12/19/2022] Open
Abstract
The C–H bond functionalization of sp3 carbon centres presents a significant challenge due to the inert nature of hydrocarbons as well as the need to selectively functionalize one of the numerous aliphatic C–H bonds embodied in organic molecules. Here, we describe catalytic, diastereoselective, and site-selective sp3 C–H hydroxylation/alkoxylation protocols featuring dihydroisoquinolones, γ-, and δ-lactams, which bear vicinal stereocenters. The hydroxylation strategy utilizes oxygen, a waste-free oxidant and affords attractive fragments for potential drug discovery. Fe-catalyzed dehydrative coupling of the resulting tertiary alcohols with simple primary alcohols has led to the construction of highly versatile unsymmetrical dialkyl ethers. Catalytic, diastereoselective, and site-selective sp3 C–H hydroxylation and alkoxylation protocols featuring lactams that bear vicinal stereocenters, is described.![]()
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Affiliation(s)
- Timothy K. Beng
- Department of Chemistry
- Central Washington University
- Ellensburg
- USA
| | - Victoria Shearer
- Department of Chemistry
- Central Washington University
- Ellensburg
- USA
| | - Rachel Davey
- Department of Chemistry
- Central Washington University
- Ellensburg
- USA
| | - Ivianne Redman
- Department of Chemistry
- Central Washington University
- Ellensburg
- USA
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28
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Fu W, Wang L, Yang Z, Shen JS, Tang F, Zhang J, Cui X. Facile access to versatile aza-macrolides through iridium-catalysed cascade allyl-amination/macrolactonization. Chem Commun (Camb) 2020; 56:960-963. [DOI: 10.1039/c9cc07372h] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Direct access to benzo-fused aza-macrolides was successfully realised via the first iridium-catalysed intermolecular decarboxylative couplings of vinylethylene carbonates with isatoic anhydrides under relatively mild conditions.
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Affiliation(s)
- Wei Fu
- Engineering Research Centre of Molecular Medicine
- Ministry of Education
- Key Laboratory of Fujian Molecular Medicine
- Key Laboratory of Xiamen Marine and Gene Drugs
- School of Biomedical Sciences
| | - Lianhui Wang
- Engineering Research Centre of Molecular Medicine
- Ministry of Education
- Key Laboratory of Fujian Molecular Medicine
- Key Laboratory of Xiamen Marine and Gene Drugs
- School of Biomedical Sciences
| | - Zi Yang
- Engineering Research Centre of Molecular Medicine
- Ministry of Education
- Key Laboratory of Fujian Molecular Medicine
- Key Laboratory of Xiamen Marine and Gene Drugs
- School of Biomedical Sciences
| | - Jiang-Shan Shen
- College of Materials Science and Engineering
- Huaqiao University
- Xiamen 361021
- P. R. China
| | - Fei Tang
- Engineering Research Centre of Molecular Medicine
- Ministry of Education
- Key Laboratory of Fujian Molecular Medicine
- Key Laboratory of Xiamen Marine and Gene Drugs
- School of Biomedical Sciences
| | - Jiayi Zhang
- Engineering Research Centre of Molecular Medicine
- Ministry of Education
- Key Laboratory of Fujian Molecular Medicine
- Key Laboratory of Xiamen Marine and Gene Drugs
- School of Biomedical Sciences
| | - Xiuling Cui
- Engineering Research Centre of Molecular Medicine
- Ministry of Education
- Key Laboratory of Fujian Molecular Medicine
- Key Laboratory of Xiamen Marine and Gene Drugs
- School of Biomedical Sciences
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29
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Doerksen RS, Meyer CC, Krische MJ. Feedstock Reagents in Metal-Catalyzed Carbonyl Reductive Coupling: Minimizing Preactivation for Efficiency in Target-Oriented Synthesis. Angew Chem Int Ed Engl 2019; 58:14055-14064. [PMID: 31162793 PMCID: PMC6764920 DOI: 10.1002/anie.201905532] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Indexed: 12/11/2022]
Abstract
Use of abundant feedstock pronucleophiles in catalytic carbonyl reductive coupling enhances efficiency in target-oriented synthesis. For such reactions, equally inexpensive reductants are desired or, ideally, corresponding hydrogen autotransfer processes may be enacted wherein alcohols serve dually as reductant and carbonyl proelectrophile. As described in this Minireview, these concepts allow reactions that traditionally require preformed organometallic reagents to be conducted catalytically in a byproduct-free manner from inexpensive π-unsaturated precursors.
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Affiliation(s)
- Rosalie S. Doerksen
- University of Texas at Austin, Department of Chemistry Welch Hall (A5300), 105 E 24 St., Austin, TX 78712, USA
| | - Cole C. Meyer
- University of Texas at Austin, Department of Chemistry Welch Hall (A5300), 105 E 24 St., Austin, TX 78712, USA
| | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry Welch Hall (A5300), 105 E 24 St., Austin, TX 78712, USA
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30
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Doerksen RS, Meyer CC, Krische MJ. Feedstock Reagents in Metal‐Catalyzed Carbonyl Reductive Coupling: Minimizing Preactivation for Efficiency in Target‐Oriented Synthesis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905532] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Rosalie S. Doerksen
- University of Texas at Austin Department of Chemistry 105 E 24th St. (A5300) Austin TX 78712-1167 USA
| | - Cole C. Meyer
- University of Texas at Austin Department of Chemistry 105 E 24th St. (A5300) Austin TX 78712-1167 USA
| | - Michael J. Krische
- University of Texas at Austin Department of Chemistry 105 E 24th St. (A5300) Austin TX 78712-1167 USA
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31
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Kozack CV, Sowin JA, Jaworski JN, Iosub AV, Stahl SS. Aerobic Acyloxylation of Allylic C-H Bonds Initiated by a Pd 0 Precatalyst with 4,5-Diazafluoren-9-one as an Ancillary Ligand. CHEMSUSCHEM 2019; 12:3003-3007. [PMID: 31107593 PMCID: PMC7641472 DOI: 10.1002/cssc.201900727] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/23/2019] [Indexed: 06/09/2023]
Abstract
Palladium-catalyzed allylic C-H oxidation has been widely studied, but most precedents use acetic acid as the coupling partner. In this study, a method compatible with diverse carboxylic acid partners has been developed. Use of a Pd0 precatalyst under aerobic reaction conditions leads to oxidation of Pd0 by O2 in the presence of the desired carboxylic acid to generate a PdII dicarboxylate that promotes acyloxylation of the allylic C-H bond. Good-to-excellent yields are obtained with a roughly 1:1 ratio of the alkene and carboxylic acid reagents. Optimized reaction conditions employ 4,5-diazafluoren-9-one (DAF) as a ligand, in combination with a quinone/iron phthalocyanine cocatalyst system to support aerobic catalytic turnover.
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Affiliation(s)
- Caitlin V Kozack
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Jennifer A Sowin
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Jonathan N Jaworski
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Andrei V Iosub
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Shannon S Stahl
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
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32
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Jaworski JN, Kozack CV, Tereniak SJ, Knapp SMM, Landis CR, Miller JT, Stahl SS. Operando Spectroscopic and Kinetic Characterization of Aerobic Allylic C-H Acetoxylation Catalyzed by Pd(OAc) 2/4,5-Diazafluoren-9-one. J Am Chem Soc 2019; 141:10462-10474. [PMID: 31184479 DOI: 10.1021/jacs.9b04699] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Allylic C-H acetoxylations are among the most widely studied palladium(II)-catalyzed C-H oxidation reactions. While the principal reaction steps are well established, key features of the catalytic mechanisms are poorly characterized, including the identity of the turnover-limiting step and the catalyst resting state. Here, we report a mechanistic study of aerobic allylic acetoxylation of allylbenzene with a catalyst system composed of Pd(OAc)2 and 4,5-diazafluoren-9-one (DAF). The DAF ligand is unique in its ability to support aerobic catalytic turnover, even in the absence of benzoquinone or other co-catalysts. Herein, we describe operando spectroscopic analysis of the catalytic reaction using X-ray absorption and NMR spectroscopic methods that allow direct observation of the formation and decay of a palladium(I) species during the reaction. Kinetic studies reveal the presence of two distinct kinetic phases: (1) a burst phase, involving rapid formation of the allylic acetoxylation product and formation of the dimeric PdI complex [PdI(DAF)(OAc)]2, followed by (2) a post-burst phase that coincides with evolution of the catalyst resting state from the PdI dimer into a π-allyl-PdII species. The data provide unprecedented insights into the role of ancillary ligands in supporting catalytic turnover with O2 as the stoichiometric oxidant and establish an important foundation for the development of improved catalysts for allylic oxidation reactions.
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Affiliation(s)
- Jonathan N Jaworski
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
| | - Caitlin V Kozack
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
| | - Stephen J Tereniak
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
| | - Spring Melody M Knapp
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
| | - Clark R Landis
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
| | - Jeffrey T Miller
- David School of Chemical Engineering , Purdue University , 480 Stadium Mall Drive , West Lafayette , Indiana 47907 , United States
| | - Shannon S Stahl
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
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33
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Wang R, Luan Y, Ye M. Transition Metal–Catalyzed Allylic C(sp
3
)–H Functionalization
via η
3
‐Allylmetal Intermediate. CHINESE J CHEM 2019. [DOI: 10.1002/cjoc.201900140] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ronghua Wang
- State Key Laboratory and Institute of Elemento‐Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
| | - Yuxin Luan
- State Key Laboratory and Institute of Elemento‐Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
| | - Mengchun Ye
- State Key Laboratory and Institute of Elemento‐Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
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34
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Li X, Sun B, Zhou J, Jin C, Yu C. Regioselective Acetoxylation of Terminal Olefins Using a Palladium(II)-Thiadiazole Catalyst. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900128] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiaohan Li
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals; Zhejiang University of Technology; Hangzhou P. R. China
| | - Bin Sun
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals; Zhejiang University of Technology; Hangzhou P. R. China
| | - Jiadi Zhou
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals; Zhejiang University of Technology; Hangzhou P. R. China
| | - Can Jin
- College of Pharmaceutical Sciences; Zhejiang University of Technology; Hangzhou P. R. China
| | - Chuangming Yu
- College of Pharmaceutical Sciences; Zhejiang University of Technology; Hangzhou P. R. China
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35
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Zheng K, Hong R. Stereoconfining macrocyclizations in the total synthesis of natural products. Nat Prod Rep 2019; 36:1546-1575. [DOI: 10.1039/c8np00094h] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This review covers selected examples of point chirality-forming macrocyclizations in natural product total synthesis in the past three decades.
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Affiliation(s)
- Kuan Zheng
- Key Laboratory of Synthetic Chemistry of Natural Substances
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
| | - Ran Hong
- Key Laboratory of Synthetic Chemistry of Natural Substances
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
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36
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Lerchen A, Knecht T, Koy M, Ernst JB, Bergander K, Daniliuc CG, Glorius F. Non‐Directed Cross‐Dehydrogenative (Hetero)arylation of Allylic C(sp
3
)−H bonds enabled by C−H Activation. Angew Chem Int Ed Engl 2018; 57:15248-15252. [DOI: 10.1002/anie.201807047] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 08/09/2018] [Indexed: 01/10/2023]
Affiliation(s)
- Andreas Lerchen
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Tobias Knecht
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Maximilian Koy
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Johannes B. Ernst
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Klaus Bergander
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Constantin G. Daniliuc
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Frank Glorius
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstrasse 40 48149 Münster Germany
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37
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Abstract
The atomistic change of C( sp3)-H to C( sp3)-O can have a profound impact on the physical and biological properties of small molecules. Traditionally, chemical synthesis has relied on pre-existing functionality to install new functionality, and directed approaches to C-H oxidation are an extension of this logic. The impact of developing undirected C-H oxidation reactions with controlled site-selectivity is that scientists gain the ability to diversify complex structures at sites remote from existing functionality, without having to carry out individual de novo syntheses. This Perspective offers a historical view of why, as recently as 2007, it was thought that the differences between aliphatic C-H bonds of the same bond type (for example, 2° aliphatic) were not large enough to distinguish them preparatively with small-molecule catalysis in the absence of directing groups or molecular recognition elements. We give an account of the discovery of Fe(PDP)-catalyzed non-directed aliphatic C-H hydroxylations and how the electronic, steric, and stereoelectronic rules for predicting site-selectivity that emerged have affected a shift in how the chemical community views the reactivity among these bonds. The discovery that site-selectivity could be altered by tuning the catalyst [i.e., Fe(CF3-PDP)] with no changes to the substrate or reaction now gives scientists the ability to exert control on the site of oxidation on a range of functionally and topologically diverse compounds. Collectively, these findings have made possible the emerging area of late-stage C-H functionalizations for streamlining synthesis and derivatizing complex molecules.
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Affiliation(s)
- M. Christina White
- Roger Adams Laboratory, Department of Chemistry, University of Illinois
at Urbana—Champaign, Urbana, Illinois 61801, United States
| | - Jinpeng Zhao
- Roger Adams Laboratory, Department of Chemistry, University of Illinois
at Urbana—Champaign, Urbana, Illinois 61801, United States
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38
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Nelson TAF, Blakey SB. Intermolecular Allylic C−H Etherification of Internal Olefins. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201809863] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Taylor A. F. Nelson
- Department of Chemistry Emory University 1515 Dickey Dr. Atlanta GA 30322 USA
| | - Simon B. Blakey
- Department of Chemistry Emory University 1515 Dickey Dr. Atlanta GA 30322 USA
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39
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Nelson TAF, Blakey SB. Intermolecular Allylic C-H Etherification of Internal Olefins. Angew Chem Int Ed Engl 2018; 57:14911-14915. [PMID: 30256503 DOI: 10.1002/anie.201809863] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Indexed: 11/08/2022]
Abstract
Herein we report on the development of an oxidative allylic C-H etherification reaction, utilizing internal olefins and alcohols as simple precursors. Key advances include the use of RhCp* complexes to promote the allylic C-H functionalization of internal olefins and the compatibility of the oxidative conditions with oxidatively sensitive alcohols, enabling the direct etherification reaction. Preliminary mechanistic studies, consistent with C-H functionalization as the rate determining step, are presented.
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Affiliation(s)
- Taylor A F Nelson
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, GA, 30322, USA
| | - Simon B Blakey
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, GA, 30322, USA
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40
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Lerchen A, Knecht T, Koy M, Ernst JB, Bergander K, Daniliuc CG, Glorius F. Nicht‐dirigierte kreuz‐dehydrierende (Hetero)arylierung von Allyl‐C(sp
3
)‐H‐Bindungen mittels C‐H‐Aktivierung. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201807047] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Andreas Lerchen
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Tobias Knecht
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Maximilian Koy
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Johannes B. Ernst
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Klaus Bergander
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Constantin G. Daniliuc
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Frank Glorius
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
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41
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Zhang WW, Gao TT, Xu LJ, Li BJ. Macrolactonization of Alkynyl Alcohol through Rh(I)/Yb(III) Catalysis. Org Lett 2018; 20:6534-6538. [DOI: 10.1021/acs.orglett.8b02858] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wen-Wen Zhang
- Department of Chemistry, Renmin University of China, Beijing 100084, China
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Tao-Tao Gao
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Li-Jin Xu
- Department of Chemistry, Renmin University of China, Beijing 100084, China
| | - Bi-Jie Li
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
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42
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Jash U, Chakraborty G, Sinha S, Sikari R, Mondal R, Paul ND. CuII
Complex of a 1,10-Phenanthroline-Based Pincer as an Efficient Catalyst for Oxidative Cross Dehydrogenative Coupling of Carboxylic Acids with Unactivated Alkanes. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800180] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Upasona Jash
- Department of Chemistry; Indian Institute of Engineering Science and Technology; Shibpur, Botanic Garden Howrah 711103 India
| | - Gargi Chakraborty
- Department of Chemistry; Indian Institute of Engineering Science and Technology; Shibpur, Botanic Garden Howrah 711103 India
| | - Suman Sinha
- Department of Chemistry; Indian Institute of Engineering Science and Technology; Shibpur, Botanic Garden Howrah 711103 India
| | - Rina Sikari
- Department of Chemistry; Indian Institute of Engineering Science and Technology; Shibpur, Botanic Garden Howrah 711103 India
| | - Rakesh Mondal
- Department of Chemistry; Indian Institute of Engineering Science and Technology; Shibpur, Botanic Garden Howrah 711103 India
| | - Nanda D. Paul
- Department of Chemistry; Indian Institute of Engineering Science and Technology; Shibpur, Botanic Garden Howrah 711103 India
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43
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Affiliation(s)
| | - Giuseppe Zanoni
- Dipartimento di Chimica; Università di Pavia; Viale Taramelli 10 27100 Pavia Italy
| | - Debabrata Maiti
- Department of Chemistry; IIT Bombay; Powai Mumbai 400076 India
- Dipartimento di Chimica; Università di Pavia; Viale Taramelli 10 27100 Pavia Italy
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44
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Abstract
Cross-coupling of nitrogen with hydrocarbons under fragment coupling conditions stands to significantly impact chemical synthesis. Herein, we disclose a C(sp3)-N fragment coupling reaction between terminal olefins and N-triflyl protected aliphatic and aromatic amines via Pd(II)/SOX (sulfoxide-oxazoline) catalyzed intermolecular allylic C-H amination. A range of (56) allylic amines are furnished in good yields (avg. 75%) and excellent regio- and stereoselectivity (avg. >20:1 linear:branched, >20:1 E: Z). Mechanistic studies reveal that the SOX ligand framework is effective at promoting functionalization by supporting cationic π-allyl Pd.
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Affiliation(s)
- Rulin Ma
- Roger Adams Laboratory, Department of Chemistry , University of Illinois , Urbana , Illinois 61801 , United States
| | - M Christina White
- Roger Adams Laboratory, Department of Chemistry , University of Illinois , Urbana , Illinois 61801 , United States
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45
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Hughes JM, Gleason JL. A bio-inspired cascade and a late-stage directed sp3 C H lithiation enables a concise total synthesis of (−)-virosaine A. Tetrahedron 2018. [DOI: 10.1016/j.tet.2017.12.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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46
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Yuan Z, Hu X, Zhang H, Liu L, Chen P, He M, Xie X, Wang X, She X. Total synthesis of conosilane A via a site-selective C–H functionalization strategy. Chem Commun (Camb) 2018; 54:912-915. [DOI: 10.1039/c7cc09367e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The strategy developed for the first total synthesis of highly oxygenated natural product conosilane A involving double manipulation of allylic C(sp3)–H functionalization renders the power of C–H functionalization in organic syntheses.
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Affiliation(s)
- Ziyun Yuan
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University
- Lanzhou
- China
| | - Xiaojun Hu
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University
- Lanzhou
- China
| | - Hao Zhang
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University
- Lanzhou
- China
| | - Lin Liu
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University
- Lanzhou
- China
| | - Peng Chen
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University
- Lanzhou
- China
| | - Min He
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University
- Lanzhou
- China
| | - Xingang Xie
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University
- Lanzhou
- China
| | - Xiaolei Wang
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University
- Lanzhou
- China
| | - Xuegong She
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University
- Lanzhou
- China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Tianjin
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47
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Abstract
An overview of the highlights in total synthesis of natural products using iridium as a catalyst is given.
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Affiliation(s)
- Changchun Yuan
- School of Chemical Engineering and Technology
- North University of China
- Taiyuan 030051
- PR China
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- PR China
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48
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Li GX, Morales-Rivera CA, Gao F, Wang Y, He G, Liu P, Chen G. A unified photoredox-catalysis strategy for C(sp 3)-H hydroxylation and amidation using hypervalent iodine. Chem Sci 2017; 8:7180-7185. [PMID: 29081950 PMCID: PMC5635418 DOI: 10.1039/c7sc02773g] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 09/02/2017] [Indexed: 12/22/2022] Open
Abstract
We report a unified photoredox-catalysis strategy for both hydroxylation and amidation of tertiary and benzylic C-H bonds. Use of hydroxyl perfluorobenziodoxole (PFBl-OH) oxidant is critical for efficient tertiary C-H functionalization, likely due to the enhanced electrophilicity of the benziodoxole radical. Benzylic methylene C-H bonds can be hydroxylated or amidated using unmodified hydroxyl benziodoxole oxidant Bl-OH under similar conditions. An ionic mechanism involving nucleophilic trapping of a carbocation intermediate by H2O or CH3CN cosolvent is presented.
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Affiliation(s)
- Guo-Xing Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | | | - Fang Gao
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Yaxin Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Gang He
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Peng Liu
- Department of Chemistry , University of Pittsburgh , Pittsburgh , PA 15260 , USA .
| | - Gong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
- Department of Chemistry , The Pennsylvania State University , 104 Chemistry Building , University Park , PA 16802 , USA .
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49
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Hu RB, Wang CH, Ren W, Liu Z, Yang SD. Direct Allylic C–H Bond Activation To Synthesize [Pd(η3-cin)(IPr)Cl] Complex: Application in the Allylation of Oxindoles. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02965] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Rong-Bin Hu
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
- State
Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou
Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People’s Republic of China
| | - Chun-Hai Wang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Wei Ren
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Zhong Liu
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Shang-Dong Yang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
- State
Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou
Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People’s Republic of China
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50
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Hughes JME, Gleason JL. A Concise Enantioselective Total Synthesis of (−)-Virosaine A. Angew Chem Int Ed Engl 2017; 56:10830-10834. [DOI: 10.1002/anie.201706273] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Jonathan M. E. Hughes
- Department of Chemistry; McGill University; 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
| | - James L. Gleason
- Department of Chemistry; McGill University; 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
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