1
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Li B, Yu F, Chen W, Seidel D. Regioselective α-Phosphonylation of Unprotected Alicyclic Amines. Org Lett 2024. [PMID: 38968591 DOI: 10.1021/acs.orglett.4c02037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/07/2024]
Abstract
Unprotected alicyclic amines undergo α-C-H bond phosphonylation via a two-stage one-pot process involving the oxidation of amine-derived lithium amides with simple ketone oxidants, generating transient imines which are then captured with phosphites or phosphine oxides. Amines with an existing α-substituent undergo regioselective α'-phosphonylation. Amine α-arylation and α'-phosphonylation can be combined, generating a difunctionalized product in a single operation.
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Affiliation(s)
- Bowen Li
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Fuchao Yu
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Weijie Chen
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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2
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Ashraf R, Zahoor AF, Ali KG, Nazeer U, Saif MJ, Mansha A, Chaudhry AR, Irfan A. Development of novel transition metal-catalyzed synthetic approaches for the synthesis of a dihydrobenzofuran nucleus: a review. RSC Adv 2024; 14:14539-14581. [PMID: 38708111 PMCID: PMC11066739 DOI: 10.1039/d4ra01830c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Accepted: 04/16/2024] [Indexed: 05/07/2024] Open
Abstract
The synthesis of dihydrobenzofuran scaffolds bears pivotal significance in the field of medicinal chemistry and organic synthesis. These heterocyclic scaffolds hold immense prospects owing to their significant pharmaceutical applications as they are extensively employed as essential precursors for constructing complex organic frameworks. Their versatility and importance make them an interesting subject of study for researchers in the scientific community. While exploring their synthesis, researchers have unveiled various novel and efficient pathways for assembling the dihydrobenzofuran core. In the wake of extensive data being continuously reported each year, we have outlined the recent updates (post 2020) on novel methodological accomplishments employing the efficient catalytic role of several transition metals to forge dihydrobenzofuran functionalities.
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Affiliation(s)
- Rabia Ashraf
- Department of Chemistry, Government College University Faisalabad 38000-Faisalabad Pakistan
| | - Ameer Fawad Zahoor
- Department of Chemistry, Government College University Faisalabad 38000-Faisalabad Pakistan
| | - Kulsoom Ghulam Ali
- Department of Chemistry, Government College University Faisalabad 38000-Faisalabad Pakistan
| | - Usman Nazeer
- Department of Chemistry, University of Houston 3585 Cullen Boulevard Texas 77204-5003 USA
| | - Muhammad Jawwad Saif
- Department of Applied Chemistry, Government College University Faisalabad 38000-Faisalabad Pakistan
| | - Asim Mansha
- Department of Chemistry, Government College University Faisalabad 38000-Faisalabad Pakistan
| | - Aijaz Rasool Chaudhry
- Department of Physics, College of Science, University of Bisha P. O. Box 551 Bisha 61922 Saudi Arabia
| | - Ahmad Irfan
- Department of Chemistry, College of Science, King Khalid University P. O. Box 9004 Abha 61413 Saudi Arabia
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3
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Zhou Y, Wensink NH, Pécharman AF, Miloserdov FM. Synthesis and Reactivity of Ruthenium(BINAP)(PPh 3). Angew Chem Int Ed Engl 2024; 63:e202318684. [PMID: 38334325 DOI: 10.1002/anie.202318684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/06/2024] [Accepted: 02/08/2024] [Indexed: 02/10/2024]
Abstract
Ru(BINAP)(PPh3)HCl cleanly reacts with LiCH2TMS to give Ru(BINAP)(PPh3) (1) that has been fully characterized, including by X-ray diffraction (BINAP and TMS stand for (2,2'-bis(diphenylphosphino)-1,1'-binaphthyl and trimethylsilyl respectively). In sharp contrast with other carbonyl-free phosphine complexes of Ru(0), 1 demonstrates a strikingly high thermal stability and no propensity for intramolecular C-H activation (cyclometalation). Yet 1 coordinates acetonitrile and readily exchanges its PPh3 ligand with alkenes and dienes, thus behaving like a "masked" 16-e Ru(0) species. Electron-poor alkenes coordinate more readily than electron-rich ones, which testifies for the nucleophilic character of the Ru(0)-BINAP fragment. While being thermally stable, 1 is highly reactive and is capable of activating C-H and N-H bonds, and even of cleaving an inert N-Et bond. The combination of high reactivity and stability originates from the P,arene-chelation by the BINAP ligand, i.e., the coordinated π-arene stabilizes Ru(0) to prevent cyclometalation, yet it can slide upon substrate coordination, thereby enabling a variety of inert bond activation reactions to occur under mild conditions.
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Affiliation(s)
- Yifei Zhou
- Laboratory of Organic Chemistry, Wageningen University, Stippeneng 4, Wageningen, 6708 WE, The Netherlands
| | - Niels H Wensink
- Laboratory of Organic Chemistry, Wageningen University, Stippeneng 4, Wageningen, 6708 WE, The Netherlands
| | | | - Fedor M Miloserdov
- Laboratory of Organic Chemistry, Wageningen University, Stippeneng 4, Wageningen, 6708 WE, The Netherlands
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4
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Dutta S, Kim JH, Bhatt K, Rickertsen DRL, Abboud KA, Ghiviriga I, Seidel D. Alicyclic-Amine-Derived Imine-BF 3 Complexes: Easy-to-Make Building Blocks for the Synthesis of Valuable α-Functionalized Azacycles. Angew Chem Int Ed Engl 2024; 63:e202313247. [PMID: 37909921 PMCID: PMC10835740 DOI: 10.1002/anie.202313247] [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: 09/06/2023] [Revised: 10/26/2023] [Accepted: 10/29/2023] [Indexed: 11/03/2023]
Abstract
A new strategy to access α-functionalized alicyclic amines via their corresponding imine-BF3 complexes is reported. Isolable imine-BF3 complexes, readily prepared via dehydrohalogenation of N-bromoamines in a base-promoted/18-crown-6 catalyzed process followed by addition of boron trifluoride etherate, undergo reactions with a wide range of organometallic nucleophiles to afford α-functionalized azacycles. Organozinc and organomagnesium nucleophiles add at ambient temperatures, obviating the need for cryogenic conditions. In situ preparation of imine-BF3 complexes provides access to α-functionalized morpholines and piperazines directly from their parent amines in a single operation. α-Functionalized morpholines can be elaborated further, for instance by installing a second substituent in the α'-position.
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Affiliation(s)
- Subhradeep Dutta
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Jae Hyun Kim
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
- College of Pharmacy, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Kamal Bhatt
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Dillon R L Rickertsen
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Khalil A Abboud
- Center for X-ray Crystallography, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Ion Ghiviriga
- Center for NMR Spectroscopy, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
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5
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Dutta S, Bhatt K, Cuffel F, Seidel D. Synthesis of Polycyclic Imidazoles via α-C-H/N-H Annulation of Alicyclic Amines. SYNTHESIS-STUTTGART 2023; 55:2343-2352. [PMID: 38314182 PMCID: PMC10836336 DOI: 10.1055/a-2022-1511] [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] [Indexed: 02/01/2023]
Abstract
Secondary alicyclic amines are converted to their corresponding ring-fused imidazoles in a simple procedure consisting of oxidative imine formation followed by a van Leusen reaction. Amines with an existing α-substituent undergo regioselective ring-fusion at the α'-position. This method was utilized in a synthesis of fadrozole.
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Affiliation(s)
- Subhradeep Dutta
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Kamal Bhatt
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Fabian Cuffel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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6
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Rana G, Kar A, Kundal S, Musib D, Jana U. DDQ/Fe(NO 3) 3-Catalyzed Aerobic Synthesis of 3-Acyl Indoles and an In Silico Study for the Binding Affinity of N-Tosyl-3-acyl Indoles toward RdRp against SARS-CoV-2. J Org Chem 2023; 88:838-851. [PMID: 36622749 DOI: 10.1021/acs.joc.2c02009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
In the present study, we herein report a DDQ-catalyzed new protocol for the synthesis of substituted 3-acylindoles. Being a potential system for virtual hydrogen storage, introduction of catalytic DDQ in combination with Fe(NO3)3·9H2O and molecular oxygen as co-catalysts offers a regioselective oxo-functionalization of C-3 alkyl-/aryllidine indolines even with scale-up investigations. Intermediate isolation, their spectroscopic characterization, and the density functional theory calculations indicate that the method involves dehydrogenative allylic hydroxylation and 1,3-functional group isomerization/aromatization followed by terminal oxidation to afford 3-acylindoles quantitatively with very high regioselectivity. This method is very general for a large number of substrates with varieties of functional groups tolerance emerging high-yield outcome. Moreover, molecular docking studies were performed for some selected ligands with an RNA-dependent RNA polymerase complex (RdRp complex) of SARS-CoV-2 to illustrate the binding potential of those ligands. The docking results revealed that few of the ligands possess the potential to inhibit the RdRp of SARS-Cov-2 with binding energies (-6.7 to -8.19 kcal/mol), which are comparably higher with respect to the reported binding energies of the conventional re-purposed drugs such as Remdesivir, Ribavirin, and so forth (-4 to -7 kcal/mol).
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Affiliation(s)
- Gopal Rana
- Department of Chemistry, Jadavpur University, Kolkata 700 032, West Bengal, India
| | - Abhishek Kar
- Department of Chemistry, Jadavpur University, Kolkata 700 032, West Bengal, India
| | - Sandip Kundal
- Department of Chemistry, Jadavpur University, Kolkata 700 032, West Bengal, India
| | - Dulal Musib
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal 795004, Manipur, India
| | - Umasish Jana
- Department of Chemistry, Jadavpur University, Kolkata 700 032, West Bengal, India
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7
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Crochet E, Anthore-Dalion L, Cantat T. Alkyl Formates as Transfer Hydroalkylation Reagents and Their Use in the Catalytic Conversion of Imines to Alkylamines. Angew Chem Int Ed Engl 2023; 62:e202214069. [PMID: 36259458 PMCID: PMC10100357 DOI: 10.1002/anie.202214069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Indexed: 12/05/2022]
Abstract
Easily accessible via a simple esterification of alcohols with formic acid, alkyl formates are used as a novel class of transfer hydroalkylation reagents, CO2 acting as a traceless linker. As a proof-of-concept, their reactivity in the transfer hydroalkylation of imines is investigated, using a ruthenium-based catalyst and LiI as promoter to cleave the C-O σ-bond of the formate scaffold. Providing tertiary amines, the reaction displays a divergent regioselectivity compared to previously reported transfer hydroalkylation strategies.
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Affiliation(s)
- Etienne Crochet
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191, Gif-sur-Yvette, France
| | | | - Thibault Cantat
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191, Gif-sur-Yvette, France
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8
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Catalytic asymmetric α C(sp3)–H addition of benzylamines to aldehydes. Nat Catal 2022. [DOI: 10.1038/s41929-022-00875-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Sakamoto K, Nishimura T. Asymmetric addition of an N-methyl C(sp 3)-H bond to cyclic alkenes enabled by an iridium/phosphine-olefin catalyst. Chem Commun (Camb) 2022; 58:11783-11786. [PMID: 36172832 DOI: 10.1039/d2cc04642c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Iridium-catalyzed asymmetric C-H addition of an N-methyl group on 3-trifluoromethyl-2-(N-methylamino)pyridine to cyclic alkenes was realized by using a phosphine-olefin ligand. Indene and its 7-substituted derivatives, acenaphthylene, and some bicyclic alkenes underwent the addition to give the corresponding products in good yields with high enantioselectivity.
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Affiliation(s)
- Kana Sakamoto
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sumiyoshi, Osaka 558-8585, Japan.
| | - Takahiro Nishimura
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sumiyoshi, Osaka 558-8585, Japan.
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10
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Yamauchi D, Yamakawa K, Nishimura T. Iridium-Catalyzed Enantioselective Direct α-C–H Alkylation of Saturated Cyclic Amines with Alkenes. Org Lett 2022; 24:6828-6833. [DOI: 10.1021/acs.orglett.2c02733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daisuke Yamauchi
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sumiyoshi, Osaka 558-8585, Japan
| | - Kentaro Yamakawa
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sumiyoshi, Osaka 558-8585, Japan
| | - Takahiro Nishimura
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sumiyoshi, Osaka 558-8585, Japan
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11
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Yu F, Valles DA, Chen W, Daniel SD, Ghiviriga I, Seidel D. Regioselective α-Cyanation of Unprotected Alicyclic Amines. Org Lett 2022; 24:6364-6368. [PMID: 36036764 PMCID: PMC9548390 DOI: 10.1021/acs.orglett.2c02148] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Secondary alicyclic amines are converted to α-aminonitriles via addition of TMSCN to their corresponding imines, intermediates that are produced in situ via the oxidation of amine-derived lithium amides with simple ketone oxidants. Amines with an existing α-substituent undergo regioselective α'-cyanation even if the C-H bonds at that site are less activated. Amine α-arylation can be combined with α'-cyanation to generate difunctionalized products in a single operation.
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Affiliation(s)
- Fuchao Yu
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. China
| | - Daniel A. Valles
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Weijie Chen
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Scott D. Daniel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Ion Ghiviriga
- Center for NMR Spectroscopy, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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12
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Xu XJ, Amuti A, Hu WJ, Adelibieke Q, Wusiman A. TEMPO-Promoted Mono- and Bisimidation of Tertiary Anilines: Synthesis of Symmetric and Unsymmetric N-Mannich Bases. J Org Chem 2022; 87:9011-9022. [PMID: 35749377 DOI: 10.1021/acs.joc.2c00700] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A TEMPO-promoted method was developed for the synthesis of symmetric bis-N-Mannich bases via sequential activation of two α,α'-amino C(sp3)-H bonds of N,N-dimethylanilines under mild conditions. This methodology was further extended for monoimidation of α-amino-functionalized methylanilines to give unsymmetric N-Mannich bases in good to high yields. Several control experiments were performed, and the coupling reaction outcomes indicated that the oxoammonium (TEMPO+) species is involved in the reaction.
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Affiliation(s)
- Xiu Juan Xu
- School of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, Xinjiang 830054, P. R. of China
| | - Adila Amuti
- School of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, Xinjiang 830054, P. R. of China
| | - Wen Jing Hu
- School of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, Xinjiang 830054, P. R. of China
| | - Qiaerbati Adelibieke
- School of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, Xinjiang 830054, P. R. of China
| | - Abudureheman Wusiman
- School of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, Xinjiang 830054, P. R. of China.,Xinjiang Key Laboratory of Energy Storage and Photoelectrocatalytic Materials, Urumqi 830054, People's Republic of China
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13
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Singh T, Panday P, Upreti GC, Ranjan S, Gupta RK, Singh A. Visible-light-mediated synthesis of α,β-diamino esters via coupling of N, N-dimethylanilines and glyoxalic oxime ethers. Org Biomol Chem 2022; 20:4522-4525. [PMID: 35605977 DOI: 10.1039/d2ob00361a] [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 visible-light-mediated synthesis of α,β-diamino esters has been developed via the cross coupling of N,N-dimethylanilines with glyoxalic oxime ethers. This protocol involves the generation of α-aminoalkyl radicals under mild reaction conditions, provides α,β-diamino esters in good to excellent yields, and can be performed on a gram-scale.
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Affiliation(s)
- Tavinder Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India.
| | - Prabhakar Panday
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India.
| | - Ganesh Chandra Upreti
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India.
| | - Sudhir Ranjan
- Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India
| | - Raju Kumar Gupta
- Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India
| | - Anand Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India.
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14
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Saadati F, Griffin SE, Schafer LL. Guanidinate Early-Transition-Metal Complexes: Efficient and Selective Hydroaminoalkylation of Alkenes. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fariba Saadati
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
- Department of Chemistry, Faculty of Science, University of Zanjan, P.O. Box 45371-38791, Zanjan M9PX+FX7, Iran
| | - Samuel E. Griffin
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Laurel L. Schafer
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
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15
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Paul A, Vasseur C, Daniel SD, Seidel D. Synthesis of Polycyclic Isoindolines via α-C-H/N-H Annulation of Alicyclic Amines. Org Lett 2022; 24:1224-1227. [PMID: 35100511 PMCID: PMC9039734 DOI: 10.1021/acs.orglett.2c00018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Relatively unstable cyclic imines, generated in situ from their corresponding alicyclic amines via oxidation of their lithium amides with simple ketone oxidants, engage aryllithium compounds containing a leaving group on an ortho-methylene functionality to provide polycyclic isoindolines in a single operation. The scope of this transformation includes pyrrolidine, piperidine, azepane, azocane, and piperazines.
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Affiliation(s)
| | | | | | - Daniel Seidel
- Corresponding Author: Daniel Seidel – Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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16
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Shyam A, Pradhan AK, Mondal P. Remote N–H activation of indole aldehydes: an investigation of the mechanism, origin of selectivities, and role of the catalyst. NEW J CHEM 2022. [DOI: 10.1039/d1nj05500c] [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
Density functional theory investigation on the N-heterocyclic carbene-catalysed synthesis of oxazinoindole derivatives via N–H activation of indole aldehydes.
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Affiliation(s)
- Abhijit Shyam
- Department of Chemistry, Assam University, Silchar-788011, Assam, India
| | | | - Paritosh Mondal
- Department of Chemistry, Assam University, Silchar-788011, Assam, India
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17
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18
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Zhu W, Sun Q, Chang H, Zhang H, Wang Q, Chen G, He G. Synthesis of
2‐Deoxy‐
C
‐Glycosides
via
Iridium‐Catalyzed
sp
2
and sp
3
C—H Glycosylation with Unfunctionalized Glycals
†. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100658] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Wanjun Zhu
- State Key Laboratory and Institute of Elemento‐Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
| | - Qikai Sun
- State Key Laboratory and Institute of Elemento‐Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
| | - Hai Chang
- State Key Laboratory and Institute of Elemento‐Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
| | - Hui‐Xing Zhang
- State Key Laboratory and Institute of Elemento‐Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
| | - Quanquan Wang
- State Key Laboratory and Institute of Elemento‐Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
| | - Gong Chen
- State Key Laboratory and Institute of Elemento‐Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
| | - Gang He
- State Key Laboratory and Institute of Elemento‐Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
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19
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Yamauchi D, Nakamura I, Nishimura T. Iridium-catalyzed enantioselective addition of an N-methyl C-H bond to α-trifluoromethylstyrenes via C-H activation. Chem Commun (Camb) 2021; 57:11787-11790. [PMID: 34676848 DOI: 10.1039/d1cc05076a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The Ir-catalyzed enantioselective addition of an N-methyl C-H bond of 2-(methylamino)pyridine derivatives to α-trifluoromethylstyrenes proceeded via C-H activation to give chiral γ-branched amine derivatives having a trifluoromethyl-substituted stereocenter. It was found that a bulky and electron-withdrawing group at the 3-position of 2-(methylamino)pyridines was necessary for the present C-H addition reaction catalyzed by a cationic iridium/chiral bisphosphine complex.
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Affiliation(s)
- Daisuke Yamauchi
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi, Osaka 558-8585, Japan.
| | - Ikumi Nakamura
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi, Osaka 558-8585, Japan.
| | - Takahiro Nishimura
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi, Osaka 558-8585, Japan.
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20
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Mantry L, Maayuri R, Kumar V, Gandeepan P. Photoredox catalysis in nickel-catalyzed C-H functionalization. Beilstein J Org Chem 2021; 17:2209-2259. [PMID: 34621388 PMCID: PMC8451005 DOI: 10.3762/bjoc.17.143] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 08/18/2021] [Indexed: 01/24/2023] Open
Abstract
Catalytic C‒H functionalization has become a powerful strategy in organic synthesis due to the improved atom-, step- and resource economy in comparison with cross-coupling or classical organic functional group transformations. Despite the significant advances in the metal-catalyzed C‒H activations, recent developments in the field of metallaphotoredox catalysis enabled C‒H functionalizations with unique reaction pathways under mild reaction conditions. Given the relative earth-abundance and cost-effective nature, nickel catalysts for photoredox C‒H functionalization have received significant attention. In this review, we highlight the developments in the field of photoredox nickel-catalyzed C‒H functionalization reactions with a range of applications until summer 2021.
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Affiliation(s)
- Lusina Mantry
- Department of Chemistry, Indian Institute of Technology Tirupati, Tirupati – Renigunta Road, Settipalli Post, Tirupati, Andhra Pradesh 517506, India
| | - Rajaram Maayuri
- Department of Chemistry, Indian Institute of Technology Tirupati, Tirupati – Renigunta Road, Settipalli Post, Tirupati, Andhra Pradesh 517506, India
| | - Vikash Kumar
- Department of Chemistry, Indian Institute of Technology Tirupati, Tirupati – Renigunta Road, Settipalli Post, Tirupati, Andhra Pradesh 517506, India
| | - Parthasarathy Gandeepan
- Department of Chemistry, Indian Institute of Technology Tirupati, Tirupati – Renigunta Road, Settipalli Post, Tirupati, Andhra Pradesh 517506, India
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21
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Valles DA, Dutta S, Paul A, Abboud KA, Ghiviriga I, Seidel D. α,α'-C-H Bond Difunctionalization of Unprotected Alicyclic Amines. Org Lett 2021; 23:6367-6371. [PMID: 34323490 PMCID: PMC8609614 DOI: 10.1021/acs.orglett.1c02187] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A simple one-pot procedure enables the sequential, regioselective, and diastereoselective introduction of the same or two different substituents to the α- and α'-positions of unprotected azacycles. Aryl, alkyl, and alkenyl substituents are introduced via their corresponding organolithium compounds. The scope of this transformation includes pyrrolidines, piperidines, azepanes, and piperazines.
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Affiliation(s)
- Daniel A. Valles
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Subhradeep Dutta
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Anirudra Paul
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Khalil A. Abboud
- Center for X-ray Crystallography, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Ion Ghiviriga
- Center for NMR Spectroscopy, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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22
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Santana CG, Krische MJ. From Hydrogenation to Transfer Hydrogenation to Hydrogen Auto-Transfer in Enantioselective Metal-Catalyzed Carbonyl Reductive Coupling: Past, Present, and Future. ACS Catal 2021; 11:5572-5585. [PMID: 34306816 PMCID: PMC8302072 DOI: 10.1021/acscatal.1c01109] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Atom-efficient processes that occur via addition, redistribution or removal of hydrogen underlie many large volume industrial processes and pervade all segments of chemical industry. Although carbonyl addition is one of the oldest and most broadly utilized methods for C-C bond formation, the delivery of non-stabilized carbanions to carbonyl compounds has relied on premetalated reagents or metallic/organometallic reductants, which pose issues of safety and challenges vis-à-vis large volume implementation. Catalytic carbonyl reductive couplings promoted via hydrogenation, transfer hydrogenation and hydrogen auto-transfer allow abundant unsaturated hydrocarbons to serve as substitutes to organometallic reagents, enabling C-C bond formation in the absence of stoichiometric metals. This perspective (a) highlights past milestones in catalytic hydrogenation, hydrogen transfer and hydrogen auto-transfer, (b) summarizes current methods for catalytic enantioselective carbonyl reductive couplings, and (c) describes future opportunities based on the patterns of reactivity that animate transformations of this type.
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Affiliation(s)
| | - Michael J Krische
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
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23
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Koperniku A, Schafer LL. Zirconium Catalyzed Hydroaminoalkylation for the Synthesis of α‐Arylated Amines and N‐Heterocycles. Chemistry 2021; 27:6334-6339. [DOI: 10.1002/chem.202100014] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Indexed: 11/06/2022]
Affiliation(s)
- Ana Koperniku
- Faculty of Pharmaceutical Sciences The University of British Columbia 2405 Wesbrook Mall Vancouver BC V6T 1Z3 Canada
- Current address: Stanford University School of Medicine Medicine 269 Campus Drive, CCSR 3140 94305-5174 Palo Alto USA
| | - Laurel L. Schafer
- Department of Chemistry The University of British Columbia 2036 Main Mall Vancouver BC V6T 1Z1 Canada
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24
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Kim JH, Paul A, Ghiviriga I, Seidel D. α-C-H Bond Functionalization of Unprotected Alicyclic Amines: Lewis-Acid-Promoted Addition of Enolates to Transient Imines. Org Lett 2021; 23:797-801. [PMID: 33464093 PMCID: PMC7924990 DOI: 10.1021/acs.orglett.0c04024] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Enolizable cyclic imines, obtained in situ from their corresponding lithium amides by oxidation with simple ketone oxidants, are readily alkylated with a range of enolates to provide mono- and polycyclic β-aminoketones in a single operation, including the natural product (±)-myrtine. Nitrile anions also serve as competent nucleophiles in these transformations, which are promoted by BF3 etherate. β-Aminoesters derived from ester enolates can be converted to the corresponding β-lactams.
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Affiliation(s)
- Jae Hyun Kim
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Anirudra Paul
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Ion Ghiviriga
- Center for NMR Spectroscopy, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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25
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Farasat Z, Nabavizadeh SM, Niroomand Hosseini F, Hoseini SJ, Abu-Omar MM. Ligand-Controlled C sp2-H versus C sp3-H Bond Formation in Cycloplatinated Complexes: A Joint Experimental and Theoretical Mechanistic Investigation. Inorg Chem 2021; 60:1998-2008. [PMID: 33476136 DOI: 10.1021/acs.inorgchem.0c03502] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The cyclometalated platinum(II) complexes [PtMe(C∧N)(L)] [1PS: C∧N = 2-phenylpyridinate (ppy), L = SMe2; 1BS: C∧N = benzo[h]quinolate (bhq), L = SMe2; 1PP: C∧N = ppy, L = PPh3; and 1BP: C∧N = bhq, L = PPh3] containing two different cyclometalated ligands and two different ancillary ligands have been investigated in the reaction with CX3CO2H (X = F or H). When L = SMe2, the Pt-Me bond rather than the Pt-C bond of the cycloplatinated complex is cleaved to give the complexes [Pt(C∧N)(CX3CO2)(SMe2)]. When L = PPh3, the selectivity of the reaction is reversed. In the reaction of [PtMe(C∧N)(PPh3)] with CF3CO2H, the Pt-C∧N bond is cleaved rather than the Pt-Me bond. The latter reaction gave [PtMe(κ1N-Hppy)(PPh3)(CF3CO2)] as an equilibrium mixture of two isomers. For L = PPh3, no reaction was observed with CH3CO2H. The reasons for this difference in selectivity for complexes 1 are computationally discussed based on the energy barrier needed for the protonolysis of the Pt-Csp3 bond versus the Pt-Csp2 bond. Two pathways including the direct one-step acid attack at the Pt-C bond (SE2) and stepwise oxidative-addition on the Pt(II) center followed by reductive elimination [SE(ox)] are proposed. A detailed density functional theory (DFT) study of these protonations along with experimental UV-vis kinetics suggests that a one-step electrophilic attack (SE2) at the Pt-C bond is the most likely mechanism for complexes 1, and changing the nature of the ancillary ligand can influence the selectivity in the Pt-C bond cleavage. The effect of the nature of the acid and cyclometalated ligand (C∧N) is also discussed.
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Affiliation(s)
- Zahra Farasat
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71467-13565, Iran
| | - S Masoud Nabavizadeh
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71467-13565, Iran.,Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | | | - S Jafar Hoseini
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71467-13565, Iran
| | - Mahdi M Abu-Omar
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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26
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Paul A, Kim JH, Daniel SD, Seidel D. Diversification of Unprotected Alicyclic Amines by C-H Bond Functionalization: Decarboxylative Alkylation of Transient Imines. Angew Chem Int Ed Engl 2021; 60:1625-1628. [PMID: 32975859 PMCID: PMC7854982 DOI: 10.1002/anie.202011641] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/24/2020] [Indexed: 12/13/2022]
Abstract
Despite extensive efforts by many practitioners in the field, methods for the direct α-C-H bond functionalization of unprotected alicyclic amines remain rare. A new advance in this area utilizes N-lithiated alicyclic amines. These readily accessible intermediates are converted to transient imines through the action of a simple ketone oxidant, followed by alkylation with a β-ketoacid under mild conditions to provide valuable β-amino ketones with unprecedented ease. Regioselective α'-alkylation is achieved for substrates with existing α-substituents. The method is further applicable to the convenient one-pot synthesis of polycyclic dihydroquinolones through the incorporation of a SN Ar step.
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Affiliation(s)
- Anirudra Paul
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
| | - Jae Hyun Kim
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
- Current address: College of Pharmacy, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Scott D Daniel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
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27
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Fang R, Zhou L, Kirillov AM, Yang L. DFT Study on Zr-Catalyzed Alkene Hydroaminoalkylation: Origin of Regioselectivity, Diastereoselectivity, and Influence of Substrate. Org Lett 2021; 23:583-587. [PMID: 33404246 DOI: 10.1021/acs.orglett.0c04119] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A DFT study was carried out to investigate a zirconium-catalyzed hydroaminoalkylation of alkenes with N-silylated benzylamine. A global reactivity index (GRI) analysis showed that that substrates act as electrophiles while the active zirconaaziridine behaves as a nucleophile. Furthermore, the distortion/interaction analysis unveiled the role of the distortion and interaction energies in controlling the regioselectivity and diastereoselectivity when different alkene substrates are used. These results provide an in-depth analysis on how the substrate type influences the product selectivity.
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Affiliation(s)
- Ran Fang
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China
| | - Lin Zhou
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Alexander M Kirillov
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal.,Research Institute of Chemistry, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya st., Moscow 117198, Russian Federation
| | - Lizi Yang
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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28
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Murugesh V, Sahoo AR, Achard M, Sharma GVM, Bruneau C, Suresh S. Ruthenium Catalyzed Regioselective β‐C(
sp
3
)−H Functionalization of
N
‐Alkyl‐
N′
‐
p–
nitrophenyl Substituted Piperazines using Aldehydes as Alkylating Agents. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- V. Murugesh
- Department of Organic Synthesis and Process Chemistry CSIR-Indian Institute of Chemical Technology (CSIR-IICT) Hyderabad 500 007 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Apurba Ranjan Sahoo
- Univ Rennes CNRS, ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226 F 35000 Rennes France
| | - Mathieu Achard
- Univ Rennes CNRS, ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226 F 35000 Rennes France
| | - Gangavaram V. M. Sharma
- Department of Organic Synthesis and Process Chemistry CSIR-Indian Institute of Chemical Technology (CSIR-IICT) Hyderabad 500 007 India
| | - Christian Bruneau
- Univ Rennes CNRS, ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226 F 35000 Rennes France
| | - Surisetti Suresh
- Department of Organic Synthesis and Process Chemistry CSIR-Indian Institute of Chemical Technology (CSIR-IICT) Hyderabad 500 007 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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29
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Paul A, Kim JH, Daniel SD, Seidel D. Diversification of Unprotected Alicyclic Amines by C−H Bond Functionalization: Decarboxylative Alkylation of Transient Imines. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011641] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Anirudra Paul
- Center for Heterocyclic Compounds, Department of Chemistry University of Florida Gainesville FL 32611 USA
| | - Jae Hyun Kim
- Center for Heterocyclic Compounds, Department of Chemistry University of Florida Gainesville FL 32611 USA
- Current address: College of Pharmacy Kangwon National University Chuncheon 24341 Republic of Korea
| | - Scott D. Daniel
- Center for Heterocyclic Compounds, Department of Chemistry University of Florida Gainesville FL 32611 USA
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry University of Florida Gainesville FL 32611 USA
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30
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Li S, Jaszczyk J, Pannecoucke X, Poisson T, Martin OR, Nicolas C. Stereospecific Synthesis of Glycoside Mimics Through Migita‐Kosugi‐Stille Cross‐Coupling Reactions of Chemically and Configurationally Stable 1‐
C
‐Tributylstannyl Iminosugars. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000886] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Sizhe Li
- Institut de Chimie Organique et Analytique UMR 7311 Université d'Orléans et CNRS Rue de Chartres, BP 6759 45067 Orléans cedex 2 France
| | - Justyna Jaszczyk
- Institut de Chimie Organique et Analytique UMR 7311 Université d'Orléans et CNRS Rue de Chartres, BP 6759 45067 Orléans cedex 2 France
| | - Xavier Pannecoucke
- Normandie Université, COBRA, UMR 6014 et FR 3038 Université de Rouen, INSA Rouen, CNRS 1 rue Tesnière 76821 Mont Saint-Aignan Cedex France
| | - Thomas Poisson
- Normandie Université, COBRA, UMR 6014 et FR 3038 Université de Rouen, INSA Rouen, CNRS 1 rue Tesnière 76821 Mont Saint-Aignan Cedex France
- Institut Universitaire de France 1 rue Descartes 75231 Paris France
| | - Olivier R. Martin
- Institut de Chimie Organique et Analytique UMR 7311 Université d'Orléans et CNRS Rue de Chartres, BP 6759 45067 Orléans cedex 2 France
| | - Cyril Nicolas
- Institut de Chimie Organique et Analytique UMR 7311 Université d'Orléans et CNRS Rue de Chartres, BP 6759 45067 Orléans cedex 2 France
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31
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Transition Metal-Catalyzed α-Position Carbon–Carbon Bond Formations of Carbonyl Derivatives. Catalysts 2020. [DOI: 10.3390/catal10080861] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
α-Functionalization of carbonyl compounds in organic synthesis has traditionally been accomplished via classical enolate chemistry. As α-functionalized carbonyl moieties are ubiquitous in biologically and pharmaceutically valuable molecules, catalytic α-alkylations have been extensively studied, yielding a plethora of practical and efficient methodologies. Moreover, stereoselective carbon–carbon bond formation at the α-position of achiral carbonyl compounds has been achieved by using various transition metal–chiral ligand complexes. This review describes recent advances—in the last 20 years and especially focusing on the last 10 years—in transition metal-catalyzed α-alkylations of carbonyl compounds, such as aldehydes, ketones, imines, esters, and amides and in efficient carbon–carbon bond formations. Active catalytic species and ligand design are discussed, and mechanistic insights are presented. In addition, recently developed photo-redox catalytic systems for α-alkylations are described as a versatile synthetic tool for the synthesis of chiral carbonyl-bearing molecules.
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32
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Shan B, Kang B, Song M, Wang R, Chen G, Li C, Zhao H. Rhodium(III)‐Catalyzed Oxidative C(sp
3
)−H Alkenylation of 8‐Methylquinolines with Maleimides Under Aerobic Conditions. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000283] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Baode Shan
- School of Chemistry and Chemical EngineeringUniversity of Jinan Jinan Shandong 250022 People's Republic of China
| | - Baotao Kang
- School of Chemistry and Chemical EngineeringUniversity of Jinan Jinan Shandong 250022 People's Republic of China
| | - Mingyue Song
- School of Chemistry and Chemical EngineeringUniversity of Jinan Jinan Shandong 250022 People's Republic of China
| | - Rui Wang
- School of Chemistry and Chemical EngineeringUniversity of Jinan Jinan Shandong 250022 People's Republic of China
| | - Guozhu Chen
- School of Chemistry and Chemical EngineeringUniversity of Jinan Jinan Shandong 250022 People's Republic of China
| | - Cuncheng Li
- School of Chemistry and Chemical EngineeringUniversity of Jinan Jinan Shandong 250022 People's Republic of China
| | - Huaiqing Zhao
- School of Chemistry and Chemical EngineeringUniversity of Jinan Jinan Shandong 250022 People's Republic of China
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences Fuzhou 350002 People's Republic of China
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33
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Kumar R, Parmar D, Gupta SS, Chandra D, Dhiman AK, Sharma U. Cp*Rh
III
‐Catalyzed Sterically Controlled C(sp
3
)−H Selective Mono‐ and Diarylation of 8‐Methylquinolines with Organoborons**. Chemistry 2020; 26:4396-4402. [DOI: 10.1002/chem.201905591] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/14/2020] [Indexed: 02/06/2023]
Affiliation(s)
- Rakesh Kumar
- Natural Product Chemistry and Process Development Division and AcSIR CSIR-IHBT 176061 Palampur India
| | - Diksha Parmar
- Natural Product Chemistry and Process Development Division and AcSIR CSIR-IHBT 176061 Palampur India
| | - Shiv Shankar Gupta
- Natural Product Chemistry and Process Development Division and AcSIR CSIR-IHBT 176061 Palampur India
| | - Devesh Chandra
- Natural Product Chemistry and Process Development Division and AcSIR CSIR-IHBT 176061 Palampur India
| | - Ankit Kumar Dhiman
- Natural Product Chemistry and Process Development Division and AcSIR CSIR-IHBT 176061 Palampur India
| | - Upendra Sharma
- Natural Product Chemistry and Process Development Division and AcSIR CSIR-IHBT 176061 Palampur India
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34
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Ohmura T, Yagi K, Kusaka S, Suginome M. Tandem C–H Transformations by a Single Iridium Catalyst: Direct Access to Indoles and Indolines from o-Alkyl-N-methylanilines. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05579] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Toshimichi Ohmura
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Kaito Yagi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Satoshi Kusaka
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Michinori Suginome
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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35
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Paul A, Chandak HS, Ma L, Seidel D. Redox-Annulations of Cyclic Amines with ortho-Cyanomethylbenzaldehydes. Org Lett 2020; 22:976-980. [PMID: 31984752 DOI: 10.1021/acs.orglett.9b04506] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Amines such as 1,2,3,4-tetrahydroisoquinoline undergo redox-neutral annulations with ortho-cyanomethylbenzaldehydes. These amine α-C-H bond functionalization reactions are promoted by acetic acid. The resulting β-aminonitriles can be converted to the corresponding β-aminoalcohols in diastereoselective fashion.
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Affiliation(s)
- Anirudra Paul
- Center for Heterocyclic Compounds, Department of Chemistry , University of Florida , Gainesville , Florida 32611 , United States.,Department of Chemistry and Chemical Biology , Rutgers, The State University of New Jersey , Piscataway , New Jersey 08854 , United States
| | - Hemant S Chandak
- Department of Chemistry and Chemical Biology , Rutgers, The State University of New Jersey , Piscataway , New Jersey 08854 , United States
| | - Longle Ma
- Department of Chemistry and Chemical Biology , Rutgers, The State University of New Jersey , Piscataway , New Jersey 08854 , United States
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry , University of Florida , Gainesville , Florida 32611 , United States.,Department of Chemistry and Chemical Biology , Rutgers, The State University of New Jersey , Piscataway , New Jersey 08854 , United States
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36
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Zhao Z, Kong X, Wang W, Hao J, Wang Y. Direct Use of Unprotected Aliphatic Amines to Generate N-Heterocycles via β-C–H Malonylation with Iodonium Ylide. Org Lett 2019; 22:230-233. [DOI: 10.1021/acs.orglett.9b04213] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Zhiguo Zhao
- School of Chemistry and Chemical Engineering, Key Laboratory of the Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, Shandong, China
| | - Xiangjin Kong
- School of Chemistry and Chemical Engineering, Key Laboratory of the Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, Shandong, China
| | - Wei Wang
- School of Chemistry and Chemical Engineering, Key Laboratory of the Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, Shandong, China
| | - Jingcheng Hao
- School of Chemistry and Chemical Engineering, Key Laboratory of the Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, Shandong, China
| | - Yao Wang
- School of Chemistry and Chemical Engineering, Key Laboratory of the Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, Shandong, China
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37
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Kumar R, Sharma R, Kumar R, Sharma U. Cp*Rh(III)-Catalyzed Regioselective C(sp3)–H Methylation of 8-Methylquinolines with Organoborons. Org Lett 2019; 22:305-309. [DOI: 10.1021/acs.orglett.9b04331] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rakesh Kumar
- Natural Product Chemistry and Process Development Division and AcSIR, CSIR-IHBT, Palampur 176061, India
| | - Ritika Sharma
- Natural Product Chemistry and Process Development Division and AcSIR, CSIR-IHBT, Palampur 176061, India
| | - Rohit Kumar
- Natural Product Chemistry and Process Development Division and AcSIR, CSIR-IHBT, Palampur 176061, India
| | - Upendra Sharma
- Natural Product Chemistry and Process Development Division and AcSIR, CSIR-IHBT, Palampur 176061, India
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38
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Koperniku A, Foth PJ, Sammis GM, Schafer LL. Zirconium Hydroaminoalkylation. An Alternative Disconnection for the Catalytic Synthesis of α-Arylated Primary Amines. J Am Chem Soc 2019; 141:18944-18948. [PMID: 31718171 DOI: 10.1021/jacs.9b10465] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Primary amine products have been prepared using zirconium-catalyzed hydroaminoalkylation of alkenes with N-silylated benzylamine substrates. Catalysis using commercially available Zr(NMe2)4 affords an alternative disconnection to access α-arylated primary amines upon aqueous workup. Substrate-dependent regio- and diastereoselectivity of the reaction is observed. Bulky substituents on the terminal alkene exclusively generate the linear regioisomer. This atom-economic catalytic strategy for the synthesis of building blocks that can undergo further synthetic elaboration is highlighted in the preparation of trifluoroethylated α-arylated amines.
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Affiliation(s)
- Ana Koperniku
- Faculty of Pharmaceutical Sciences , The University of British Columbia , 2405 Wesbrook Mall Vancouver BC V6T 1Z3 , Canada
| | - Paul J Foth
- Department of Chemistry , The University of British Columbia , 2036 Main Mall , Vancouver , BC BC V6T 1Z1 , Canada
| | - Glenn M Sammis
- Department of Chemistry , The University of British Columbia , 2036 Main Mall , Vancouver , BC BC V6T 1Z1 , Canada
| | - Laurel L Schafer
- Department of Chemistry , The University of British Columbia , 2036 Main Mall , Vancouver , BC BC V6T 1Z1 , Canada
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39
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Ohmura T, Kusaka S, Torigoe T, Suginome M. Iridium‐Catalyzed C(
sp
3
)−H Addition of Methyl Ethers across Intramolecular Carbon–Carbon Double Bonds Giving 2,3‐Dihydrobenzofurans. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900749] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Toshimichi Ohmura
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, KyotoUniversity Katsura, Nishikyo-ku, Kyoto 615-8510 Japan
| | - Satoshi Kusaka
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, KyotoUniversity Katsura, Nishikyo-ku, Kyoto 615-8510 Japan
| | - Takeru Torigoe
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, KyotoUniversity Katsura, Nishikyo-ku, Kyoto 615-8510 Japan
| | - Michinori Suginome
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, KyotoUniversity Katsura, Nishikyo-ku, Kyoto 615-8510 Japan
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40
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Cai XH, Yang MZ, Xie B. Recent Investigations on the Functionalizations of C(sp3)-H Bonds Adjacent to a Heteroatom. LETT ORG CHEM 2019. [DOI: 10.2174/1570178616666190123131353] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The selective functionalization of unactivated C(sp3)-H bonds has been regarded as an efficient
and atom-economical approach for the formation of carbon-carbon or carbon-heteroatom bonds
in modern organic synthesis. Especially, the oxidative activation of C(sp3)–H bonds adjacent to a heteroatom
exhibits quite significant features in synthetic chemistry. For example, the direct functionalizations
of amines, amides and ethers present important alternative tactics for the synthesis of various
novel and useful molecules from simple starting materials. Many remarkable achievements in the area
had continuously been made in the past decades. Here we reviewed recent investigations on the transformations
of C(sp3)-H bond adjacent to a heteroatom.
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Affiliation(s)
- Xiao-Hua Cai
- School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Meng-Zhi Yang
- School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Bing Xie
- School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China
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41
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Paul A, Seidel D. α-Functionalization of Cyclic Secondary Amines: Lewis Acid Promoted Addition of Organometallics to Transient Imines. J Am Chem Soc 2019; 141:8778-8782. [PMID: 31117670 DOI: 10.1021/jacs.9b04325] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cyclic imines, generated in situ from their corresponding N-lithiated amines and a ketone hydride acceptor, undergo reactions with a range of organometallic nucleophiles to generate α-functionalized amines in a single operation. Activation of the transient imines by Lewis acids that are compatible with the presence of lithium alkoxides was found to be crucial to accommodate a broad range of nucleophiles including lithium acetylides, Grignard reagents, and aryllithiums with attenuated reactivities.
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Affiliation(s)
- Anirudra Paul
- Center for Heterocyclic Compounds, Department of Chemistry , University of Florida , Gainesville , Florida 32611 , United States
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry , University of Florida , Gainesville , Florida 32611 , United States
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