1
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Di Matteo M, Gagliardi A, Pradal A, Veiros LF, Gallou F, Poli G. Pd-Catalyzed C(sp 2)-H/C(sp 2)-H Coupling of Limonene. J Org Chem 2024; 89:10451-10461. [PMID: 39025478 DOI: 10.1021/acs.joc.4c00501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2024]
Abstract
Limonene undergoes a regioselective Pd(II)-catalyzed C(sp2)-H/C(sp2)-H coupling with acrylic acid esters and amides, α,β-unsaturated ketones, styrenes, and allyl acetate, affording novel 1,3-dienes. DFT computations gave results in accord with the experimental results and allowed for the formulation of a plausible mechanism. The postfunctionalization of one of the coupled products was achieved via a large-scale Sonogashira reaction conducted under micellar catalysis.
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Affiliation(s)
- Marco Di Matteo
- Institut Parisien de Chimie Moléculaire (IPCM), Faculté des Sciences et Ingénierie, CNRS, Sorbonne Université, 4 Place Jussieu, 75005 Paris, France
| | - Anna Gagliardi
- Institut Parisien de Chimie Moléculaire (IPCM), Faculté des Sciences et Ingénierie, CNRS, Sorbonne Université, 4 Place Jussieu, 75005 Paris, France
| | - Alexandre Pradal
- Institut Parisien de Chimie Moléculaire (IPCM), Faculté des Sciences et Ingénierie, CNRS, Sorbonne Université, 4 Place Jussieu, 75005 Paris, France
| | - Luis F Veiros
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049 001 Lisboa, Portugal
| | | | - Giovanni Poli
- Institut Parisien de Chimie Moléculaire (IPCM), Faculté des Sciences et Ingénierie, CNRS, Sorbonne Université, 4 Place Jussieu, 75005 Paris, France
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2
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González-Fernández E, Marinus N, Dhankhar J, Linden A, Čorić I. Control over Anion Coordination on Pd(II), Cu(I), and Ag(I) with Regioisomeric Phosphine-Carboxylate Ligands. Chemistry 2024; 30:e202401215. [PMID: 38688855 DOI: 10.1002/chem.202401215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Accepted: 04/26/2024] [Indexed: 05/02/2024]
Abstract
The coordination of anionic donors is involved at various stages of catalytic cycles in transition-metal catalysis, but control over the spatial positioning of anions around a metal center is a challenge in coordination chemistry. Here we show that regioisomeric phosphine-carboxylate ligands provide spatial anion control on palladium(II) centers by favoring either κ2, cis-κ1, or trans-κ1 coordination of the carboxylate donor. Additionally, the palladium(II) carboxylates, which contain a methyl donor, upon protonation, deliver metal-alkyl complexes that feature a coordinated carboxylic acid. Such complexes can be considered as models for the minima that follow the concerted metalation-deprotonation transition state for C-H activation. The predictability of the coordination modes is further demonstrated on silver(I) and copper(I) centers, for which less common structures of mononuclear and dinuclear complexes can be obtained by using spatial anion control. Our results demonstrate the potential for spatial control over carboxylate anions in coordination chemistry.
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Affiliation(s)
- Elisa González-Fernández
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, Zurich, 8057, Switzerland
| | - Nittert Marinus
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, Zurich, 8057, Switzerland
| | - Jyoti Dhankhar
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, Zurich, 8057, Switzerland
| | - Anthony Linden
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, Zurich, 8057, Switzerland
| | - Ilija Čorić
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, Zurich, 8057, Switzerland
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3
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Pipaón Fernández N, Cruise O, Easton SEF, Kaplan JM, Woodard JL, Hruszkewycz DP, Leitch DC. Direct Heterocycle C-H Alkenylation via Dual Catalysis Using a Palladacycle Precatalyst: Multifactor Optimization and Scope Exploration Enabled by High-Throughput Experimentation. J Org Chem 2024. [PMID: 38206166 DOI: 10.1021/acs.joc.3c02311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
One of the major challenges in developing catalytic methods for C-C bond formation is the identification of generally applicable reaction conditions, particularly if multiple substrate structural classes are involved. Pd-catalyzed direct arylation reactions are powerful transformations that enable direct functionalization of C-H bonds; however, the corresponding direct alkenylation reactions, using vinyl (pseudo) halide electrophiles, are less well developed. Inspired by process development efforts toward GSK3368715, an investigational active pharmaceutical ingredient, we report that a Pd(II) palladacycle derived from tri-tert-butylphosphine and Pd(OAc)2 is an effective single-component precatalyst for a variety of direct alkenylation reactions. High-throughput experimentation identified optimal solvent/base combinations for a variety of HetAr-H substrate classes undergoing C-H activation without the need for cocatalysts or stoichiometric silver bases (e.g., Ag2CO3). We propose this reaction proceeds via a dual cooperative catalytic mechanism, where in situ-generated Pd(0) supports a canonical Pd(0)/(II) cross-coupling cycle and the palladacycle effects C-H activation via CMD in a redox-neutral cycle. In all, 192 substrate combinations were tested with a hit rate of approximately 40% and 24 isolated examples. Importantly, this method was applied to prepare a key intermediate in the synthesis of GSK3368715 on multigram scale.
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Affiliation(s)
- Nahiane Pipaón Fernández
- Department of Chemistry, University of Victoria, 3800 Finnerty Road., Victoria, Briish Columbia V8P 5C2, Canada
| | - Odhran Cruise
- Department of Chemistry, University of Victoria, 3800 Finnerty Road., Victoria, Briish Columbia V8P 5C2, Canada
| | - Sarah E F Easton
- Department of Chemistry, University of Victoria, 3800 Finnerty Road., Victoria, Briish Columbia V8P 5C2, Canada
| | - Justin M Kaplan
- Chemical Development, GlaxoSmithKline, 1250 South Collegeville Road, Collegeville, Pennsylvania 19426, United States
| | - John L Woodard
- Chemical Development, GlaxoSmithKline, 1250 South Collegeville Road, Collegeville, Pennsylvania 19426, United States
| | - Damian P Hruszkewycz
- Chemical Development, GlaxoSmithKline, 1250 South Collegeville Road, Collegeville, Pennsylvania 19426, United States
| | - David C Leitch
- Department of Chemistry, University of Victoria, 3800 Finnerty Road., Victoria, Briish Columbia V8P 5C2, Canada
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4
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Krishna Rao MV, Kareem S, Vali SR, Subba Reddy BV. Recent advances in metal directed C-H amidation/amination using sulfonyl azides and phosphoryl azides. Org Biomol Chem 2023; 21:8426-8462. [PMID: 37831479 DOI: 10.1039/d3ob01160g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
Transition metal-catalyzed C-N bond formation reactions have gained popularity as a method for selectively transforming common C-H bonds into N-functionalized molecules. This approach is particularly useful for synthesizing aminated molecules, which require aminating reagents and amidated building blocks. Over the past two decades, significant advancements have been achieved in transition-metal-catalyzed C-H functionalization, with organic azides emerging as promising amino sources and internal oxidants. This review focuses on recent developments in utilizing sulfonyl and phosphoryl azides as building blocks for directed intra- and intermolecular C-H functionalization reactions. Specifically, it discusses methods for synthesizing sulfonamidates and phosphoramidates using sulfonyl and phosphoryl azides, respectively. The article highlights the potential of C-H functionalization reactions with organic azides for efficiently and sustainably synthesizing N-functionalized molecules, providing valuable insights into the latest advancements in this field.
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Affiliation(s)
- M V Krishna Rao
- Department of Fluoro & Agrochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India.
| | - Shaik Kareem
- Department of Fluoro & Agrochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India.
| | - Shaik Ramjan Vali
- Department of Fluoro & Agrochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India.
| | - B V Subba Reddy
- Department of Fluoro & Agrochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India.
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5
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Paul A, Sengupta A, Sarkar B, Yadav S. Acetoxy Group-Directed Regioselective C2 Alkenylation of Indoles via Pd-Ag Bimetallic Catalysis. J Org Chem 2023; 88:14423-14434. [PMID: 37794781 DOI: 10.1021/acs.joc.3c01442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
Regioselective C-H functionalizations of indoles reported to date with directing groups at C3 mainly rely on functional groups that are linked to the indole via C-C bonds. However, groups that are linked to the indole core by C-X linkages are also attractive due to the possibility of further modifications of the C-X bond. Herein, we report a 3-acetoxy directing group for the regioselective C2 alkenylation of indoles via a C-H activation-based, cross-dehydrogenative, oxidative Heck-type reaction. The reaction is catalyzed by Pd(II) and Ag(I) with stoichiometric Cu(II) as the oxidant and provides the 2-alkenylated indoles in yields of 52-84%. The reaction conditions are compatible with several functional groups at different positions as well as different N-protecting groups or free NH groups on the indole core. With respect to the alkene coupling partners, the reactions are successful with acrylates, vinyl sulfates, and phosphates. Specifically designed experiments, as well as density functional theory (DFT) computational studies, reveal that a heterodinuclear [Pd(μ-OAc)3Ag] bimetallic species is the actual catalyst responsible for the C-H alkenylation. A mechanistic path involving this catalytic species was also found to be favorable over other possible pathways for explaining the observed regioselectivity through DFT studies.
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Affiliation(s)
- Aditya Paul
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM) Dhanbad, Jharkhand 826004, India
| | - Arunava Sengupta
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM) Dhanbad, Jharkhand 826004, India
| | - Bijan Sarkar
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM) Dhanbad, Jharkhand 826004, India
| | - Somnath Yadav
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM) Dhanbad, Jharkhand 826004, India
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6
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de Carvalho RL, Diogo EBT, Homölle SL, Dana S, da Silva Júnior EN, Ackermann L. The crucial role of silver(I)-salts as additives in C-H activation reactions: overall analysis of their versatility and applicability. Chem Soc Rev 2023; 52:6359-6378. [PMID: 37655711 PMCID: PMC10714919 DOI: 10.1039/d3cs00328k] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Indexed: 09/02/2023]
Abstract
Transition-metal catalyzed C-H activation reactions have been proven to be useful methodologies for the assembly of synthetically meaningful molecules. This approach bears intrinsic peculiarities that are important to be studied and comprehended in order to achieve its best performance. One example is the use of additives for the in situ generation of catalytically active species. This strategy varies according to the type of additive and the nature of the pre-catalyst that is being used. Thus, silver(I)-salts have proven to play an important role, due to the resulting high reactivity derived from the pre-catalysts of the main transition metals used so far. While being powerful and versatile, the use of silver-based additives can raise concerns, since superstoichiometric amounts of silver(I)-salts are typically required. Therefore, it is crucial to first understand the role of silver(I) salts as additives, in order to wisely overcome this barrier and shift towards silver-free systems.
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Affiliation(s)
- Renato L de Carvalho
- Institute of Exact Sciences, Department of Chemistry, Federal University of Minas Gerais-UFMG, 31270-901, Belo Horizonte, MG, Brazil.
| | - Emilay B T Diogo
- Institute of Exact Sciences, Department of Chemistry, Federal University of Minas Gerais-UFMG, 31270-901, Belo Horizonte, MG, Brazil.
| | - Simon L Homölle
- Institut für Organische und Biomolekulare Chemie and Wöhler Research Institute for Sustainable Chemistry, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany.
| | - Suman Dana
- Institut für Organische und Biomolekulare Chemie and Wöhler Research Institute for Sustainable Chemistry, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany.
| | - Eufrânio N da Silva Júnior
- Institute of Exact Sciences, Department of Chemistry, Federal University of Minas Gerais-UFMG, 31270-901, Belo Horizonte, MG, Brazil.
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie and Wöhler Research Institute for Sustainable Chemistry, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany.
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7
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Platt G, Aguiar PM, Athavan G, Bray JT, Scott NW, Fairlamb IJ, Perutz RN. Opening a Pandora's Flask on a Prototype Catalytic Direct Arylation Reaction of Pentafluorobenzene: The Ag 2CO 3/Pd(OAc) 2/PPh 3 System. Organometallics 2023; 42:2378-2394. [PMID: 37711884 PMCID: PMC10498494 DOI: 10.1021/acs.organomet.3c00309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Indexed: 09/16/2023]
Abstract
Direct C-H functionalization reactions have opened new avenues in catalysis, removing the need for prefunctionalization of at least one of the substrates. Although C-H functionalization catalyzed by palladium complexes in the presence of a base is generally considered to proceed by the CMD/AMLA-6 mechanism, recent research has shown that silver(I) salts, frequently used as bases, can function as C-H bond activators instead of (or in addition to) palladium(II). In this study, we examine the coupling of pentafluorobenzene 1 to 4-iodotoluene 2a (and its analogues) to form 4-(pentafluorophenyl)toluene 3a catalyzed by palladium(II) acetate with the commonplace PPh3 ligand, silver carbonate as base, and DMF as solvent. By studying the reaction of 1 with Ag2CO3/PPh3 and with isolated silver (triphenylphosphine) carbonate complexes, we show the formation of C-H activation products containing the Ag(C6F5)(PPh3)n unit. However, analysis is complicated by the lability of the Ag-PPh3 bond and the presence of multiple species in the solution. The speciation of palladium(II) is investigated by high-resolution-MAS NMR (chosen for its suitability for suspensions) with a substoichiometric catalyst, demonstrating the formation of an equilibrium mixture of Pd(Ar)(κ1-OAc)(PPh3)2 and [Pd(Ar)(μ-OAc)(PPh3)]2 as resting states (Ar = Ph, 4-tolyl). These two complexes react stoichiometrically with 1 to form coupling products. The catalytic reaction kinetics is investigated by in situ IR spectroscopy revealing a two-term rate law and dependence on [Pdtot/nPPh3]0.5 consistent with the dissociation of an off-cycle palladium dimer. The first term is independent of [1], whereas the second term is first order in [1]. The observed rates are very similar with Pd(PPh3)4, Pd(Ph)(κ1-OAc)(PPh3)2, and [Pd(Ph)(μ-OAc)(PPh3)]2 catalysts. The kinetic isotope effect varied significantly according to conditions. The multiple speciation of both AgI and PdII acts as a warning against specifying the catalytic cycles in detail. Moreover, the rapid dynamic interconversion of AgI species creates a level of complexity that has not been appreciated previously.
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Affiliation(s)
| | | | | | - Joshua T.W. Bray
- Department of Chemistry, University of York, York YO10 5DD, United
Kingdom
| | - Neil W.J. Scott
- Department of Chemistry, University of York, York YO10 5DD, United
Kingdom
| | - Ian J.S. Fairlamb
- Department of Chemistry, University of York, York YO10 5DD, United
Kingdom
| | - Robin N. Perutz
- Department of Chemistry, University of York, York YO10 5DD, United
Kingdom
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8
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Fan Z, Strassfeld DA, Park HS, Wu K, Yu JQ. Formal γ-C-H Functionalization of Cyclobutyl Ketones: Synthesis of cis-1,3-Difunctionalized Cyclobutanes. Angew Chem Int Ed Engl 2023; 62:e202303948. [PMID: 37051944 PMCID: PMC10330309 DOI: 10.1002/anie.202303948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 04/10/2023] [Accepted: 04/11/2023] [Indexed: 04/14/2023]
Abstract
1,3-Difunctionalized cyclobutanes are an emerging scaffold in medicinal chemistry that can confer beneficial pharmacological properties to small-molecule drug candidates. However, the diastereocontrolled synthesis of these compounds typically requires complicated synthetic routes, indicating a need for novel methods. Here, we report a sequential C-H/C-C functionalization strategy for the stereospecific synthesis of cis-γ-functionalized cyclobutyl ketones from readily available cyclobutyl aryl ketones. Specifically, a bicyclo[1.1.1]pentan-2-ol intermediate is generated from the parent cyclobutyl ketone via an optimized Norrish-Yang procedure. This intermediate then undergoes a ligand-enabled, palladium-catalyzed C-C cleavage/functionalization to produce valuable cis-γ-(hetero)arylated, alkenylated, and alkynylated cyclobutyl aryl ketones, the benzoyl moiety of which can subsequently be converted to a wide range of functional groups including amides and esters.
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Affiliation(s)
- Zhoulong Fan
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Daniel A Strassfeld
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Han Seul Park
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Kevin Wu
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
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9
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Sinha NK, Mishra V, Thirupathi N. Influence of the Steric/Electronic Properties of N-Aryl Substituents in Cycloplatinated Guanidinate(1-) Complexes on the Formation of Discrete Pt → Ag Complexes and One-Dimensional Coordination Polymer. Inorg Chem 2023; 62:7644-7661. [PMID: 37129511 DOI: 10.1021/acs.inorgchem.2c04172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The reactions of cycloplatinated guanidinate(1-) complexes 1-6 with AgTFA (TFA = OC(O)CF3) in 1:1 and 1:2 PtII/AgI molar ratios afforded complexes containing three types of Pt2Ag2 skeletons (7-10, 11, and 13), one 1D CP containing Pt2Ag3 skeleton (16), and a Pt2Ag4 complex (17) in 91-95% (method 1), 73-82% (method 2) (7-10), and 54-79% (11, 13, 16, and 17) yields. The reactions of 11 with 2,6-XylNC (2,6-Xyl = 2,6-Me2C6H3) and 4-DMAP (4-dimethylaminopyridine) gave a neutral complex 18 and an ionic complex 19, respectively. Molecular structures of 12 complexes were unambiguously determined by single-crystal X-ray diffraction. Ten complexes contain unprecedented PtAg skeletons and are shown to contain multiple number of dative Pt → Ag bonds supported by the TFA ligand, platinated carbon of the TAG ligand, or both these ligands in conjunction with the Ag-Ag contacts stabilized by argentophilic interaction. Further, the new complexes were characterized by analytical, IR, and multinuclear NMR (19F, 1H, 13C{1H}, and 195Pt) spectroscopies, powder X-ray diffraction, and TGA/DTA. In solution, 9 and 19 exist in more than one form as identified by multinuclear NMR, and this behavior is ascribed to the restricted (N2)C-N(H)Ar single-bond rotation of the TAG ligand. The photophysical properties of 9 and 11 are reported.
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Affiliation(s)
| | - Vishwesh Mishra
- Department of Chemistry, University of Delhi, Delhi 110 007, India
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10
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Advances in Catalytic C–F Bond Activation and Transformation of Aromatic Fluorides. Catalysts 2022. [DOI: 10.3390/catal12121665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The activation and transformation of C–F bonds in fluoro-aromatics is a highly desirable process in organic chemistry. It provides synthetic methods/protocols for the generation of organic compounds possessing single or multiple C–F bonds, and effective catalytic systems for further study of the activation mode of inert chemical bonds. Due to the high polarity of the C–F bond and it having the highest bond energy in organics, C–F activation often faces considerable academic challenges. In this mini-review, the important research achievements in the activation and transformation of aromatic C–F bond, catalyzed by transition metal and metal-free systems, are presented.
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11
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Sable DA, Gholap A, Kommyreddy SP, Fartade DJ, Gharpure SJ, Schulzke C, Kapdi AR. Heteroatom-Assisted Regio- and Stereoselective Palladium-Catalyzed Carboxylation of 9-Allyl Adenine. J Org Chem 2022; 87:12574-12585. [PMID: 36173114 DOI: 10.1021/acs.joc.2c00659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Strategy for the synthesis of acyclic nucleoside analogs of biological relevance via highly regio- and stereoselective C-H functionalization employing heteroatom-assisted palladium-catalyzed carboxylation of 9-allyl adenine is disclosed. Substrate scope with different carboxylic acids was performed giving decent to good yields of the desired products. The method also allowed for the synthesis of deuterated analogs.
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Affiliation(s)
- Dhanashri A Sable
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Raod, Matunga, Mumbai 400019, India
| | - Aniket Gholap
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Raod, Matunga, Mumbai 400019, India
| | | | - Dipak J Fartade
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Santosh J Gharpure
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Carola Schulzke
- Institute fur Biochemie, University of Greifswald, Felix-Hausdorff Strasse 4, D-17487 Greifswald, Germany
| | - Anant R Kapdi
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Raod, Matunga, Mumbai 400019, India
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12
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Saha A, Ghosh A, Guin S, Panda S, Mal DK, Majumdar A, Akita M, Maiti D. Substrate‐Rhodium Cooperativity in Photoinduced
ortho
‐Alkynylation of Arenes. Angew Chem Int Ed Engl 2022; 61:e202210492. [DOI: 10.1002/anie.202210492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Argha Saha
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Animesh Ghosh
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Srimanta Guin
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Sanjib Panda
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Dibya Kanti Mal
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Abhirup Majumdar
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Munetaka Akita
- Tokyo Tech World Research Hub Initiative (WRHI) Laboratory for Chemistry and Life Science Tokyo Institute of Technology Tokyo Japan
| | - Debabrata Maiti
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
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13
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Marset X. Palladium-catalysed C sp3-H functionalisation of unactivated 8-aminoquinoline amides in deep eutectic solvents. Org Biomol Chem 2022; 20:7071-7075. [PMID: 36001018 DOI: 10.1039/d2ob01333a] [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
The Csp3-H activation of aliphatic amides is described for the first time in deep eutectic solvents (DESs) without the need for Ag salts. The use of eutectic mixtures improves the yields obtained with volatile organic solvents, and allows for the reuse of the catalyst. Post-synthetic modifications can also be performed in DESs, increasing the sustainability of the process and the value of the products obtained.
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Affiliation(s)
- Xavier Marset
- Departamento de Química Orgánica and Instituto de Síntesis Orgánica (ISO), Facultad de Ciencias Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain.
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14
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Saha A, Ghosh A, Guin S, Panda S, Mal DK, Majumdar A, Akita M, Maiti D. Substrate‐Rhodium Cooperativity in Photoinduced ortho‐Alkynylation of Arenes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202210492] [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)
- Argha Saha
- IIT Bombay: Indian Institute of Technology Bombay CHEMISTRY INDIA
| | - Animesh Ghosh
- IIT Bombay: Indian Institute of Technology Bombay CHEMISTRY INDIA
| | - Srimanta Guin
- IIT Bombay: Indian Institute of Technology Bombay CHEMISTRY INDIA
| | - Sanjib Panda
- Indian Institute of Technology Bombay CHEMISTRY INDIA
| | - Dibya Kanti Mal
- IIT Bombay: Indian Institute of Technology Bombay CHEMISTRY INDIA
| | - Abhirup Majumdar
- IIT Bombay: Indian Institute of Technology Bombay CHEMISTRY INDIA
| | - Munetaka Akita
- Tokyo Institute of Technology Chemistry and Life Science JAPAN
| | - Debabrata Maiti
- Indian Institute of Technology-Bombay Department of Chemistry Powai 400076 Mumbai INDIA
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15
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Athavan G, Tanner TFN, Whitwood AC, Fairlamb IJS, Perutz RN. Direct Evidence for Competitive C–H Activation by a Well-Defined Silver XPhos Complex in Palladium-Catalyzed C–H Functionalization. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | - Robin N. Perutz
- Department of Chemistry, University of York, York YO10 5DD, U.K
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16
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Čorić I, Dhankhar J. Introduction to Spatial Anion Control for Direct C–H Arylation. Synlett 2022. [DOI: 10.1055/s-0040-1719860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractC–H activation of functionally rich molecules without the need for directing groups promises shorter organic syntheses and late-stage diversification of molecules for drug discovery. We highlight recent examples of palladium-catalyzed nondirected functionalization of C–H bonds in arenes as limiting substrates with a focus on the development of the concept of spatial anion control for direct C–H arylation.1 C–H Activation and the CMD Mechanism2 Nondirected C–H Functionalizations of Arenes as Limiting Substrates3 Nondirected C–H Arylation4 Spatial Anion Control for Direct C–H Arylation5 Coordination Chemistry with Spatial Anion Control6 Conclusion
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17
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Balakrishnan V, Murugesan V, Chindan B, Rasappan R. Attenuation of Ni(0) Decomposition: Mechanistic Insights into AgF-Assisted Nickel-Mediated Silylation. Inorg Chem 2022; 61:1438-1446. [PMID: 34995056 DOI: 10.1021/acs.inorgchem.1c03108] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In nickel-mediated Kumada cross-coupling reactions, low valent active nickel complexes are often generated in situ and the ligands usually govern the reactivity or stability of these complexes. However, the decomposition of active nickel complexes is inevitable if the subsequent reaction is sluggish. While we recently developed AgF-assisted nickel catalysis to cross-couple methyl ethers and silylmagnesium reagents, the intriguing catalytic role of AgF and the actual active nickel species remains elusive. Recently, both Ni(0) and Ni(I) intermediate complexes are identified as active species in Kumada cross-coupling reactions. Control experiments in combination with 31P nuclear magnetic resonance (NMR) suggest that AgF attenuates the decomposition of in situ generated Ni(0) species. The plausible Ni(0) and Ni(I) intermediate complexes were synthesized, and experimental findings are consistent with the actual catalytic cycle being Ni(0)/Ni(II) rather than Ni(I)/Ni(III).
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Affiliation(s)
- Venkadesh Balakrishnan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram 695551, Kerala, India
| | - Vetrivelan Murugesan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram 695551, Kerala, India
| | - Bincy Chindan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram 695551, Kerala, India
| | - Ramesh Rasappan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram 695551, Kerala, India
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18
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Liu S, Wang Q, Huang F, Wang W, Yang C, Liu J, Chen D. Insight into the mechanism of the arylation of arenes via norbornene relay palladation through meta- to para-selectivity. Org Chem Front 2022. [DOI: 10.1039/d1qo01500a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A theoretical insight was shown into the origin of site-selectivity in the arylation of arenes by a norbornene relay palladation through meta- to para-selectivity.
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Affiliation(s)
- Shengnan Liu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Qiong Wang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Fang Huang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Wenjuan Wang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Chong Yang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Jianbiao Liu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Dezhan Chen
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, P. R. China
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19
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Kori S, Bhujbal Y, Vadagaonkar K, Kapdi AR, Kommyreddy SP, Gharpure SJ. Room temperature HFIP/Ag-promoted palladium-catalyzed C-H functionalization of benzothiazole with iodoarenes. Chem Commun (Camb) 2021; 58:847-850. [PMID: 34931644 DOI: 10.1039/d1cc06063e] [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
A versatile synthetic protocol involving the room temperature direct arylation of benzothiazole with a wide variety of iodoarenes under Ag-promoted Pd-catalyzed conditions in HFIP as the reaction solvent has been presented. A sequential HFIP-promoted selective iodination of arenes followed by Pd-catalyzed direct arylation of benzothiazole has also been disclosed. The utility of the developed protocol has been demonstrated by the synthesis of anti-tumor agents, PMX-610 and CJM-126 (precursor).
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Affiliation(s)
- Santosh Kori
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Road, Matunga, Mumbai-400019, India. .,Institute of Chemical Technology-Indian Oil Odisha Campus, IIT Kharagpur Extension Centre, Mouza Samantpuri, Bhubaneswar-751013, Odisha, India
| | - Yuvraj Bhujbal
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Road, Matunga, Mumbai-400019, India.
| | - Kamlesh Vadagaonkar
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Road, Matunga, Mumbai-400019, India.
| | - Anant R Kapdi
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Road, Matunga, Mumbai-400019, India.
| | | | - Santosh J Gharpure
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India
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20
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Ghosh S, Shilpa S, Athira C, Sunoj RB. Role of Additives in Transition Metal Catalyzed C–H Bond Activation Reactions: A Computational Perspective. Top Catal 2021. [DOI: 10.1007/s11244-021-01527-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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21
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Sciortino G, Maseras F. Computational Study of Homogeneous Multimetallic Cooperative Catalysis. Top Catal 2021. [DOI: 10.1007/s11244-021-01493-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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22
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Liu W, Liu Z, Liu X, Dang Y. Mechanism of Pd-catalysed C(sp 3)-H arylation of thioethers with Ag(I) additives. Org Biomol Chem 2021; 19:6766-6770. [PMID: 34286794 DOI: 10.1039/d1ob00704a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Mechanistic studies reveal that Pd-catalyzed C(sp3)-H arylation of thioethers with silver(i) additives takes place via C(sp3)-H activation, oxidative addition and reductive elimination, wherein all steps proceed via the heterodimeric Pd-Ag pathway. Besides, the active heterodimeric Pd-Ag species are detected by mass spectrometry via control experiments.
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Affiliation(s)
- Wenjing Liu
- Key Laboratory for Environmental Factors Control of Agro-product Quality Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China.
| | - Zheyuan Liu
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, Tianjin 300072, China.
| | - Xiaowei Liu
- Key Laboratory for Environmental Factors Control of Agro-product Quality Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China.
| | - Yanfeng Dang
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, Tianjin 300072, China.
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23
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Uttry A, Mal S, van Gemmeren M. Late-Stage β-C(sp 3)-H Deuteration of Carboxylic Acids. J Am Chem Soc 2021; 143:10895-10901. [PMID: 34279928 DOI: 10.1021/jacs.1c06474] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Carboxylic acids are highly abundant in bioactive molecules. In this study, we describe the late-stage β-C(sp3)-H deuteration of free carboxylic acids. On the basis of the finding that C-H activation with our catalysts is reversible, the de-deuteration process was first optimized. The resulting method uses ethylenediamine-based ligands and can be used to achieve the desired deuteration when using a deuterated solvent. The reported method allows for the functionalization of a wide range of free carboxylic acids with diverse substitution patterns, as well as the late-stage deuteration of bioactive molecules and related frameworks and enables the functionalization of nonactivated methylene β-C(sp3)-H bonds for the first time.
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Affiliation(s)
- Alexander Uttry
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Sourjya Mal
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Manuel van Gemmeren
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany
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24
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Bhattacharya T, Dutta S, Maiti D. Deciphering the Role of Silver in Palladium-Catalyzed C–H Functionalizations. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02552] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Trisha Bhattacharya
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Subhabrata Dutta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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25
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Correa A. Metal‐Catalyzed C(sp
2
)−H Functionalization Processes of Phenylalanine‐ and Tyrosine‐Containing Peptides. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100374] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Arkaitz Correa
- University of the Basque Country (UPV/EHU) Department of Organic Chemistry I Joxe Mari Korta R&D Center Avda. Tolosa 72 20018 Donostia-San Sebastián Spain
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26
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Andrade-Sampedro P, Matxain JM, Correa A. Pd-Catalyzed C(sp 2 )-H Alkoxycarbonylation of Phenethyl- and Benzylamines with Chloroformates as CO Surrogates. Chemistry 2021; 27:5782-5789. [PMID: 33433940 DOI: 10.1002/chem.202005338] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Indexed: 12/26/2022]
Abstract
The site-selective functionalization of C-H bonds within a complex molecule remains a challenging task of capital synthetic importance. Herein, an unprecedented Pd-catalyzed C(sp2 )-H alkoxycarbonylation of phenylalanine derivatives and other amines featuring picolinamide as the directing group (DG) is reported. This oxidative coupling is distinguished by its scalability, operational simplicity, and avoids the use of toxic carbon monoxide as the C1 source. Remarkably, the easy cleavage of the DG enables the efficient assembly of isoindolinone compounds. Density Functional Theory calculations support a PdII /PdIV catalytic cycle.
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Affiliation(s)
- Paula Andrade-Sampedro
- Department of Organic Chemistry I, Joxe Mari Korta R&D Center, University of the Basque Country (UPV/EHU), Avda. Tolosa 72, 20018, Donostia-San Sebastián, Spain.,Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018, Donostia-San Sebastián, Spain
| | - Jon M Matxain
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia Saila, Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU), Paseo Manuel de Lardizabal 3, 20018, Donostia-San Sebastián, Spain.,Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018, Donostia-San Sebastián, Spain
| | - Arkaitz Correa
- Department of Organic Chemistry I, Joxe Mari Korta R&D Center, University of the Basque Country (UPV/EHU), Avda. Tolosa 72, 20018, Donostia-San Sebastián, Spain
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27
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Shi X, Sosa Carrizo ED, Cordier M, Roger J, Pirio N, Hierso JC, Fleurat-Lessard P, Soulé JF, Doucet H. C-H Bond Arylation of Pyrazoles at the β-Position: General Conditions and Computational Elucidation for a High Regioselectivity. Chemistry 2021; 27:5546-5554. [PMID: 33624911 DOI: 10.1002/chem.202100031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Indexed: 12/11/2022]
Abstract
Direct arylation of most five-membered ring heterocycles are generally easily accessible and strongly favored at the α-position using classical palladium-catalysis. Conversely, regioselective functionalization of such heterocycles at the concurrent β-position remains currently very challenging. Herein, we report general conditions for regioselective direct arylation at the β-position of pyrazoles, while C-H α-position is free. By using aryl bromides as the aryl source and a judicious choice of solvent, the arylation reaction of variously N-substituted pyrazoles simply proceeds via β-C-H bond functionalization. The β-regioselectivity is promoted by a ligand-free palladium catalyst and a simple base without oxidant or further additive, and tolerates a variety of substituents on the bromoarene. DFT calculations revealed that a protic solvent such as 2-ethoxyethan-1-ol significantly enhances the acidity of the proton at β-position of the pyrazoles and thus favors this direct β-C-H bond arylation. This selective pyrazoles β-C-H bond arylation was successfully applied for the straightforward building of π-extended poly(hetero)aromatic structures via further Pd-catalyzed combined α-C-H intermolecular and intramolecular C-H bond arylation in an overall highly atom-economical process.
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Affiliation(s)
- Xinzhe Shi
- Univ Rennes, CNRS ISCR-UMR 6226, 35000, Rennes, France
| | - E Daiann Sosa Carrizo
- Université de Bourgogne, Institut de Chimie Moléculaire de, l'Université de Bourgogne, UMR CNRS 6302, Université, Bourgogne Franche-Comté (UBFC), 9 avenue Alain Savary, 21078, Dijon, France
| | - Marie Cordier
- Univ Rennes, CNRS ISCR-UMR 6226, 35000, Rennes, France
| | - Julien Roger
- Université de Bourgogne, Institut de Chimie Moléculaire de, l'Université de Bourgogne, UMR CNRS 6302, Université, Bourgogne Franche-Comté (UBFC), 9 avenue Alain Savary, 21078, Dijon, France
| | - Nadine Pirio
- Université de Bourgogne, Institut de Chimie Moléculaire de, l'Université de Bourgogne, UMR CNRS 6302, Université, Bourgogne Franche-Comté (UBFC), 9 avenue Alain Savary, 21078, Dijon, France
| | - Jean-Cyrille Hierso
- Université de Bourgogne, Institut de Chimie Moléculaire de, l'Université de Bourgogne, UMR CNRS 6302, Université, Bourgogne Franche-Comté (UBFC), 9 avenue Alain Savary, 21078, Dijon, France
| | - Paul Fleurat-Lessard
- Université de Bourgogne, Institut de Chimie Moléculaire de, l'Université de Bourgogne, UMR CNRS 6302, Université, Bourgogne Franche-Comté (UBFC), 9 avenue Alain Savary, 21078, Dijon, France
| | | | - Henri Doucet
- Univ Rennes, CNRS ISCR-UMR 6226, 35000, Rennes, France
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28
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Talukdar K, Sarkar T, Roy S, Punniyamurthy T. Pd-Catalyzed sp 3 C-H alkoxycarbonylation of 8-methylquinolines using Mo(CO) 6 as a CO surrogate. Chem Commun (Camb) 2021; 57:3359-3362. [PMID: 33666212 DOI: 10.1039/d1cc00465d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A Pd(ii)-catalyzed three-component sp3 C-H alkoxycarbonylation of 8-methylquinonlines (8-MQs) with alcohols is accomplished using the colorless crystalline Mo(CO)6 as a CO source. The protocol is compatible with a wide range of 8-MQs and alcohols, furnishing the carbonylated adducts in moderate to good yields. The substrate scope, functional group tolerance and natural product mutation are the important practical features.
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Affiliation(s)
- Kangkan Talukdar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India.
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29
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Saini G, Kapur M. Palladium-catalyzed functionalizations of acidic and non-acidic C(sp 3)-H bonds - recent advances. Chem Commun (Camb) 2021; 57:1693-1714. [PMID: 33492315 DOI: 10.1039/d0cc06892f] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A tremendous upsurge has been seen in the recent decade for the proximal and remote functionalization of activated and unactivated substrates via palladium redox pathways. This feature article discusses some of the recent reports on direct as well as indirect C(sp3)-H functionalization via cross-coupling reactions under palladium catalysis. Activated substrates (possessing acidic C(sp3)-H) including enones, ketones, aldehydes, silylenol ethers, esters, silyl ketene acetals, amides, cyano, α-amino esters, and O-carbamates, capable of undergoing cross-coupling reactions at the α-, β-, γ-, δ- and ε-positions, will be discussed. To overcome the challenging task of achieving regioselectivity, a variety of innovative modifications have been reported. The reports of C-H activations based on directing group, and as native functionality have been illustrated at the β-, γ- and δ-positions. Substrates such as α-amino esters, carbonyls, carboxylic acids and their derivatives, afford site-selective C(sp3)-H functionalization via varied-sized reactive metallacycles and are a unique class of substrates whose C(sp3)-H functionalizations were earlier considered as very difficult.
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Affiliation(s)
- Gaurav Saini
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, MP, India.
| | - Manmohan Kapur
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, MP, India.
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30
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Landge V, Maxwell JM, Chand-Thakuri P, Kapoor M, Diemler ET, Young MC. Palladium-Catalyzed Regioselective Arylation of Unprotected Allylamines. JACS AU 2021; 1:13-22. [PMID: 34467268 PMCID: PMC8395680 DOI: 10.1021/jacsau.0c00003] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Indexed: 05/03/2023]
Abstract
Palladium-catalyzed organometallic transformations of free amines are often unsuccessful due to side reactions, such as oxidation, that can occur. However, the ability to furnish the free amine products from these reactions is important for improving the utility and sustainability of these processes, especially for accessing their potential as medicinal and agrochemical agents. Notably, the 3,3-diarylallylamine motif is prevalent in a variety of biologically relevant structures, yet there are few catalytic approaches to their synthesis, and none involving the free amine. Herein, we describe a simple protocol for the arylation of cinnamylamines and the diarylation of terminal allylamines to generate a diverse group of 3,3-diarylallylamine products using a PdII precatalyst. Key features of the method are the ability to access relatively mild conditions that facilitate a broad substrate scope as well as direct diarylation of terminal allylamine substrates. In addition, several complex and therapeutically relevant molecules are included to demonstrate the utility of the transformation.
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Affiliation(s)
- Vinod
G. Landge
- Department
of Chemistry and Biochemistry, School of Green Chemistry and Engineering, The University of Toledo, Toledo, Ohio 43606, United States
| | - Justin M. Maxwell
- Department
of Chemistry and Biochemistry, School of Green Chemistry and Engineering, The University of Toledo, Toledo, Ohio 43606, United States
| | - Pratibha Chand-Thakuri
- Department
of Chemistry and Biochemistry, School of Green Chemistry and Engineering, The University of Toledo, Toledo, Ohio 43606, United States
| | - Mohit Kapoor
- Department
of Chemistry and Biochemistry, School of Green Chemistry and Engineering, The University of Toledo, Toledo, Ohio 43606, United States
| | - Evan T. Diemler
- Department
of Chemistry and Biochemistry, School of Green Chemistry and Engineering, The University of Toledo, Toledo, Ohio 43606, United States
| | - Michael C. Young
- Department
of Chemistry and Biochemistry, School of Green Chemistry and Engineering, The University of Toledo, Toledo, Ohio 43606, United States
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31
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Ding Y, Yan H, Chen R, Xiao X, Wang Z, Wang L, Ma Y. Expeditious Approach to Indoloquinazolinones via Double Annulations of o-Aminoacetophenones and Isocyanates. J Org Chem 2021; 86:1448-1455. [PMID: 33373228 DOI: 10.1021/acs.joc.0c02155] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A novel procedure for a one-pot cascade reaction of o-aminoacetophenones and aryl/aliphatic isocyanates catalyzed/oxidized by the [Pd]/[Ag] system was developed. The reaction involves two C-N bond and one C-C bond formations during the double annulation process and the desired indoloquinazolinones and derivatives were afforded up to 81% yields from readily available substrates with a tolerance of a broad variety.
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Affiliation(s)
- Yuxin Ding
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China.,School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou 310053, P R China
| | - Huihui Yan
- School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou 310053, P R China
| | - Rener Chen
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China
| | - Xuqiong Xiao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, No. 2318 Yuhangtang Road Hangzhou 311121, P R China
| | - Zhiming Wang
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China
| | - Lei Wang
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China
| | - Yongmin Ma
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China.,School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou 310053, P R China
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32
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Niu PP, Liu PY, Meng YN, Yu F, He YP. MIA-Directed 2-Pyridione-Enabled Selective Ortho-C–H Arylation of Phenylalanine: A Mechanistic Study. J Org Chem 2021; 86:3096-3106. [PMID: 33442983 DOI: 10.1021/acs.joc.0c02872] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Peng-Peng Niu
- Key Laboratory of Petrochemical Catalytic Science and Technology, Liaoning Shihua University, Dandong Road West 1, Fushun 113001, China
| | - Peng-Yu Liu
- Key Laboratory of Petrochemical Catalytic Science and Technology, Liaoning Shihua University, Dandong Road West 1, Fushun 113001, China
| | - Yue-Ning Meng
- Key Laboratory of Petrochemical Catalytic Science and Technology, Liaoning Shihua University, Dandong Road West 1, Fushun 113001, China
| | - Fang Yu
- Key Laboratory of Petrochemical Catalytic Science and Technology, Liaoning Shihua University, Dandong Road West 1, Fushun 113001, China
| | - Yu-Peng He
- Key Laboratory of Petrochemical Catalytic Science and Technology, Liaoning Shihua University, Dandong Road West 1, Fushun 113001, China
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33
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Huang A, Han Y, Wu P, Gao Y, Huo Y, Chen Q, Li X. Ligand-accelerated site-selective Csp 2–H and Csp 3–H alkynylations of alcohols via Pd( ii) catalysis. Org Chem Front 2021. [DOI: 10.1039/d1qo01095f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A ligand accelerated site-selective C–H alkynylation, including secondary and tertiary Csp3–H alkynylation of weakly coordinated yet synthetically promising alcohols, via putative 6, 7 and 8-membered palladacycle intermediates, was developed.
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Affiliation(s)
- Aidong Huang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi Road Guangzhou Higher Education Mega Center, Guangzhou, 510006, China
| | - Yishen Han
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi Road Guangzhou Higher Education Mega Center, Guangzhou, 510006, China
| | - Peiqing Wu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi Road Guangzhou Higher Education Mega Center, Guangzhou, 510006, China
| | - Yang Gao
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi Road Guangzhou Higher Education Mega Center, Guangzhou, 510006, China
| | - Yanping Huo
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi Road Guangzhou Higher Education Mega Center, Guangzhou, 510006, China
| | - Qian Chen
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi Road Guangzhou Higher Education Mega Center, Guangzhou, 510006, China
| | - Xianwei Li
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi Road Guangzhou Higher Education Mega Center, Guangzhou, 510006, China
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34
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Dhankhar J, González-Fernández E, Dong CC, Mukhopadhyay TK, Linden A, Čorić I. Spatial Anion Control on Palladium for Mild C-H Arylation of Arenes. J Am Chem Soc 2020; 142:19040-19046. [PMID: 33125849 DOI: 10.1021/jacs.0c09611] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
C-H arylation of arenes without the use of directing groups is a challenge, even for simple molecules, such as benzene. We describe spatial anion control as a concept for the design of catalytic sites for C-H bond activation, thereby enabling nondirected C-H arylation of arenes at ambient temperature. The mild conditions enable late-stage structural diversification of biologically relevant small molecules, and site-selectivity complementary to that obtained with other methods of arene functionalization can be achieved. These results reveal the potential of spatial anion control in transition-metal catalysis for the functionalization of C-H bonds under mild conditions.
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Affiliation(s)
- Jyoti Dhankhar
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Elisa González-Fernández
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Chao-Chen Dong
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Tufan K Mukhopadhyay
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Anthony Linden
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Ilija Čorić
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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35
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Anand M, Rohr B, Statt MJ, Nørskov JK. Scaling Relationships and Volcano Plots in Homogeneous Catalysis. J Phys Chem Lett 2020; 11:8518-8526. [PMID: 32931282 DOI: 10.1021/acs.jpclett.0c01991] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Scaling relations and volcano plots are widely used in heterogeneous catalysis. In this Perspective, we discuss the prospects and challenges associated with the application of similar concepts in homogeneous catalysis using examples from the literature that have appeared recently.
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Affiliation(s)
- Megha Anand
- Department of Physics, Technical University of Denmark, Fysikvej Building 311, 2800 Kongens Lyngby, Denmark
| | - Brian Rohr
- Department of Chemical Engineering, SUNCAT Center for Surface Science and Catalysis, Stanford University, 443 Via Ortega, Stanford, California 94035, United States
| | - Michael J Statt
- Department of Chemical Engineering, SUNCAT Center for Surface Science and Catalysis, Stanford University, 443 Via Ortega, Stanford, California 94035, United States
| | - Jens K Nørskov
- Department of Physics, Technical University of Denmark, Fysikvej Building 311, 2800 Kongens Lyngby, Denmark
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36
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San Segundo M, Correa A. Site-selective aqueous C-H acylation of tyrosine-containing oligopeptides with aldehydes. Chem Sci 2020; 11:11531-11538. [PMID: 34094398 PMCID: PMC8162766 DOI: 10.1039/d0sc03791e] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 09/30/2020] [Indexed: 12/14/2022] Open
Abstract
The development of useful synthetic tools to label amino acids within a peptide framework for the ultimate modification of proteins in a late-stage fashion is a challenging task of utmost importance within chemical biology. Herein, we report the first Pd-catalyzed C-H acylation of a collection of Tyr-containing peptides with aldehydes. This water-compatible tagging technique is distinguished by its site-specificity, scalability and full tolerance of sensitive functional groups. Remarkably, it provides straightforward access to a high number of oligopeptides with altered side-chain topology including mimetics of endomorphin-2 and neuromedin N, thus illustrating its promising perspectives toward the diversification of structurally complex peptides and chemical ligation.
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Affiliation(s)
- Marcos San Segundo
- University of the Basque Country (UPV/EHU), Department of Organic Chemistry I, Joxe Mari Korta R&D Center Avda. Tolosa 72 20018 Donostia-San Sebastián Spain
| | - Arkaitz Correa
- University of the Basque Country (UPV/EHU), Department of Organic Chemistry I, Joxe Mari Korta R&D Center Avda. Tolosa 72 20018 Donostia-San Sebastián Spain
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37
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Weng Y, Ding X, Oliveira JCA, Xu X, Kaplaneris N, Zhu M, Chen H, Chen Z, Ackermann L. Peptide late-stage C(sp 3)-H arylation by native asparagine assistance without exogenous directing groups. Chem Sci 2020; 11:9290-9295. [PMID: 34094199 PMCID: PMC8161531 DOI: 10.1039/d0sc03830j] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 08/11/2020] [Indexed: 12/15/2022] Open
Abstract
There is a strong demand for novel native peptide motifs for post-synthetic modifications of peptides without pre-installation and subsequent removal of directing groups. Herein, we report an efficient method for peptide late-stage C(sp3)-H arylations assisted by the unmodified side chain of asparagine (Asn) without any exogenous directing group. Thereby, site-selective arylations of C(sp3)-H bonds at the N-terminus of di-, tri-, and tetrapeptides have been achieved. Likewise, we have constructed a key building block for accessing agouti-related protein (AGRP) active loop analogues in a concise manner.
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Affiliation(s)
- Yiyi Weng
- College of Pharmaceutical Sciences, Zhejiang University of Technology Hangzhou 310014 P. R. China
- Institut fuer Organische und Biomolekulare Chemie, Georg-August-Universitaet Goettingen Tammannstrasse 2 Goettingen 37077 Germany
| | - Xingxing Ding
- College of Pharmaceutical Sciences, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - João C A Oliveira
- Institut fuer Organische und Biomolekulare Chemie, Georg-August-Universitaet Goettingen Tammannstrasse 2 Goettingen 37077 Germany
| | - Xiaobin Xu
- College of Pharmaceutical Sciences, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Nikolaos Kaplaneris
- Institut fuer Organische und Biomolekulare Chemie, Georg-August-Universitaet Goettingen Tammannstrasse 2 Goettingen 37077 Germany
| | - Meijie Zhu
- College of Pharmaceutical Sciences, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Hantao Chen
- College of Pharmaceutical Sciences, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Zhuo Chen
- College of Pharmaceutical Sciences, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Lutz Ackermann
- Institut fuer Organische und Biomolekulare Chemie, Georg-August-Universitaet Goettingen Tammannstrasse 2 Goettingen 37077 Germany
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38
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Yang K, Song M, Liu H, Ge H. Palladium-catalyzed direct asymmetric C-H bond functionalization enabled by the directing group strategy. Chem Sci 2020; 11:12616-12632. [PMID: 34123236 PMCID: PMC8163320 DOI: 10.1039/d0sc03052j] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 07/08/2020] [Indexed: 01/01/2023] Open
Abstract
In the past decade, selective C-C and C-heteroatom bond construction through palladium-catalyzed direct C-H bond functionalization has been extensively studied by employing a variety of directing groups. Within this category, direct asymmetric C(sp2)-H and C(sp3)-H activation for the construction of highly enantiomerically enriched skeletons still progressed at a slow pace. This minireview briefly introduces the major advances in the field for palladium-catalyzed direct asymmetric C-H bond functionalization via the directing group strategy.
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Affiliation(s)
- Ke Yang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University Changzhou Jiangsu 213164 China
| | - Mengjie Song
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University Changzhou Jiangsu 213164 China
| | - Hao Liu
- Department of Chemistry and Biochemistry, Texas Tech University Lubbock Texas 79409 USA
| | - Haibo Ge
- Department of Chemistry and Biochemistry, Texas Tech University Lubbock Texas 79409 USA
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39
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Zhang J, Han L, Bi S, Liu T. Distinct Roles of Ag(I) and Cu(II) as Cocatalysts in Achieving Positional-Selective C-H Alkenylation of Isoxazoles: A Theoretical Investigation. J Org Chem 2020; 85:8387-8396. [PMID: 32490669 DOI: 10.1021/acs.joc.0c00721] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
For C-H alkenylation of aryl-substituted diarylisoxazoles, one mode is N-directed C-H alkenylation and the other is C-H alkenylation in the isoxazole ring. In this study, selective C-H alkenylations of 3,5-diarylisoxazoles have been investigated theoretically with the aid of density functional theory (DFT) calculations. With Cp*RhIII as the catalyst, the N-directed C-H alkenylation is preferred as a result of the stronger interaction energy caused by the nitrogen-directing effect. With Pd(OAc)2 as the catalyst and Ag2CO3 as the cocatalyst, their combination switches the regioselectivity to the C-H alkenylation in the isoxazole ring. The strong structural distortion involved in the competing N-directed olefin insertion transition state was found to suppress N-directed C-H alkenylation. With Pd(OAc)2 as the catalyst and Cu(OTf)2 as the cocatalyst, the N-directed C-H alkenylation becomes preferred due to the strong coordination of the nitrogen atom to the copper center. In particular, the structural and mechanistic information involved in the above two heterodimetallic Pd/Ag and Pd/Cu catalytic systems will help toward understanding and designing novel relevant heterodimetallic-catalyzed reactions.
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Affiliation(s)
- Jing Zhang
- Department of Chemistry and Chemical Engineering, Jining University, Qufu 273155, Shandong, China.,School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Lingli Han
- Department of Chemistry and Chemical Engineering, Jining University, Qufu 273155, Shandong, China.,School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Siwei Bi
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Tao Liu
- Department of Chemistry and Chemical Engineering, Jining University, Qufu 273155, Shandong, China.,School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
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40
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Chen YQ, Singh S, Wu Y, Wang Z, Hao W, Verma P, Qiao JX, Sunoj RB, Yu JQ. Pd-Catalyzed γ-C(sp 3)-H Fluorination of Free Amines. J Am Chem Soc 2020; 142:9966-9974. [PMID: 32363869 DOI: 10.1021/jacs.9b13537] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first example of free amine γ-C(sp3)-H fluorination is realized using 2-hydroxynicotinaldehyde as the transient directing group. A wide range of cyclohexyl and linear aliphatic amines could be fluorinated selectively at the γ-methyl and methylene positions. Electron withdrawing 3,5-disubstituted pyridone ligands were identified to facilitate this reaction. Computational studies suggest that the turnover determining step is likely the oxidative addition step for methylene fluorination, while it is likely the C-H activation step for methyl fluorination. The explicit participation of Ag results in a lower energetic span for methylene fluorination and a higher energetic span for methyl fluorination, which is consistent with the experimental observation that the addition of silver salt is desirable for methylene but not for methyl fluorination. Kinetic studies on methyl fluorination suggest that the substrate and PdL are involved in the rate-determining step, indicating that the C-H activation step may be partially rate-determining. Importantly, an energetically preferred pathway has identified an interesting pyridone-assisted bimetallic transition state for the oxidative addition step in methylene fluorination, thus uncovering a potential new role of the pyridone ligand.
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Affiliation(s)
- Yan-Qiao Chen
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Sukriti Singh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India
| | - Yongwei Wu
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Zhen Wang
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Wei Hao
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Pritha Verma
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Jennifer X Qiao
- Discovery Chemistry, Bristol-Myers Squibb, PO Box 4000, Princeton, New Jersey 08543, United States
| | - Raghavan B Sunoj
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
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41
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Oschmann M, Johansson Holm L, Pourghasemi-Lati M, Verho O. Synthesis of Elaborate Benzofuran-2-carboxamide Derivatives through a Combination of 8-Aminoquinoline Directed C-H Arylation and Transamidation Chemistry. Molecules 2020; 25:E361. [PMID: 31952313 PMCID: PMC7024369 DOI: 10.3390/molecules25020361] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/09/2020] [Accepted: 01/13/2020] [Indexed: 12/20/2022] Open
Abstract
Herein, we present a short and highly modular synthetic route that involves 8-aminoquinoline directed C-H arylation and transamidation chemistry, and which enables access to a wide range of elaborate benzofuran-2-carboxamides. For the directed C-H arylation reactions, Pd catalysis was used to install a wide range of aryl and heteroaryl substituents at the C3 position of the benzofuran scaffold in high efficiency. Directing group cleavage and further diversification of the C3-arylated benzofuran products were then achieved in a single synthetic operation through the utilization of a one-pot, two-step transamidation procedure, which proceeded via the intermediate N-acyl-Boc-carbamates. Given the high efficiency and modularity of this synthetic strategy, it constitutes a very attractive method for generating structurally diverse collections of benzofuran derivatives for small molecule screening campaigns.
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Affiliation(s)
| | | | | | - Oscar Verho
- Arrhenius Laboratory, Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden; (M.O.); (L.J.H.); (M.P.-L.)
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42
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Zhan BB, Jiang MX, Shi BF. Late-stage functionalization of peptides via a palladium-catalyzed C(sp3)–H activation strategy. Chem Commun (Camb) 2020; 56:13950-13958. [DOI: 10.1039/d0cc06133f] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Recent advances in the late-stage modification of peptides via palladium-catalyzed C(sp3)–H functionalization are summarized.
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Affiliation(s)
- Bei-Bei Zhan
- Department of Chemistry
- Zhejiang University
- Hangzhou
- China
| | - Meng-Xue Jiang
- School of Biotechnology and Health Sciences
- Wuyi University
- Jiangmen
- Guangdong 529020
- China
| | - Bing-Feng Shi
- Department of Chemistry
- Zhejiang University
- Hangzhou
- China
- College of Chemistry and Molecular Engineering
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43
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Liu B, Ouyang W, Nie J, Gao Y, Feng K, Huo Y, Chen Q, Li X. Weak coordinated nitrogen functionality enabled regioselective C–H alkynylation via Pd(ii)/mono-N-protected amino acid catalysis. Chem Commun (Camb) 2020; 56:11255-11258. [DOI: 10.1039/d0cc04739b] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
By using mono-N-protected amino acid (MPAA) ligand under Pd(ii) catalysis, regioselective C–H alkynylation of weak coordinated nitrogen functionalities was developed with great efficiency, proceeding via 5, 6 and 7-membered palladacycle intermediates.
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Affiliation(s)
- Bifu Liu
- School of Chemistry and Material Engineering
- Huizhou University
- Huizhou
- China
| | - Wensen Ouyang
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou
- China
| | - Jianhong Nie
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou
- China
| | - Yang Gao
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou
- China
| | - Kejun Feng
- School of Chemistry and Material Engineering
- Huizhou University
- Huizhou
- China
| | - Yanping Huo
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou
- China
| | - Qian Chen
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou
- China
| | - Xianwei Li
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou
- China
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44
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Xu X, Chen K. Palladium-catalyzed C–H activation of anisole with electron-deficient auxiliary ligands: a mechanistic investigation. Org Biomol Chem 2020; 18:5857-5866. [DOI: 10.1039/d0ob01133a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In this work, the experimentally observed site-selectivity and ligand choice of Yu's meta-arylation reaction were rationalized through DFT calculations.
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Affiliation(s)
- Xinyu Xu
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- People's Republic of China
| | - Kezhi Chen
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- People's Republic of China
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