1
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Höeg F, Luxenberger L, Fedulin A, Jacobi von Wangelin A. Cobalt-catalyzed double hydroboration of pyridines. Chem Sci 2024; 15:5201-5210. [PMID: 38577376 PMCID: PMC10988591 DOI: 10.1039/d3sc05418g] [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: 10/12/2023] [Accepted: 02/28/2024] [Indexed: 04/06/2024] Open
Abstract
Cobalt(ii) complexes were prepared from a modular phosphinopyridonate platform and applied to the hydroboration of pyridines. The synthetically useful, yet challenging, double hydroboration toward tetrahydropyridine derivatives was successfully performed with high activity and regiocontrol. This new method enabled the direct synthesis of N-heterocyclic allylic boronates from commercial pyridines and pinacolborane (HBpin). One-pot acetylation afforded the bench-stable borylated N-acetyl tetrahydropyridines in good yields. The synthetic utility of this procedure was demonstrated by a gram-scale double hydroboration-acetylation sequence followed by chemical diversification. Mechanistic experiments indicated metal-ligand cooperativity involving ligand-centered C-H activation and the intermediacy of a cobalt(iii) hydride species.
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Affiliation(s)
- Finn Höeg
- Dept of Chemistry, University of Hamburg Martin Luther King Pl. 6 20146 Hamburg Germany
- Philipps-University of Marburg Hans-Meerwein-Str 4 35043 Marburg Germany
| | - Lea Luxenberger
- Dept of Chemistry, University of Hamburg Martin Luther King Pl. 6 20146 Hamburg Germany
| | - Andrey Fedulin
- Dept of Chemistry, University of Hamburg Martin Luther King Pl. 6 20146 Hamburg Germany
- University of Regensburg Universitätsstr 31 93053 Regensburg Germany
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2
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Zhang J, Hu Y, Zhang TY, Chen ZC, Du W, Chen YC. Palladium(0)-Catalyzed Enantioselective Construction of Multifunctional Piperidine Derivatives from 1,3-Dienes, N-Cyano Imines, and Beyond. Org Lett 2023; 25:8133-8138. [PMID: 37933993 DOI: 10.1021/acs.orglett.3c03261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
An enantioselective (4 + 2) reaction between 1,3-dienes and N-cyano imines has been developed under Pd(0) catalysis, proceeding through a cascade vinylogous addition and intramolecular allylic amination sequence. 2,6-cis-Disubstituted-1,2,3,6-tetrahydropyridines were furnished as single diastereomers in moderate to good yields and enantiocontrol. Moreover, a more challenging three-component (2 + 2 + 2) annulation of 1,3-dienes, N-cyano imines, and activated alkenes was efficiently realized to afford piperidines with high structural complexity, albeit with moderate enantioselectivity.
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Affiliation(s)
- Jian Zhang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan 610041, People's Republic of China
| | - Yuan Hu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan 610041, People's Republic of China
| | - Tian-Ying Zhang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan 610041, People's Republic of China
| | - Zhi-Chao Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan 610041, People's Republic of China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan 610041, People's Republic of China
| | - Ying-Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan 610041, People's Republic of China
- Tianfu Jincheng Laboratory, Frontiers Medical Center, Chengdu, Sichuan 610041, People's Republic of China
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3
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Dabbs J, Ericson MN, Wilde JH, Lombardo RF, Ashcraft EC, Dickie DA, Harman WD. The Tungsten-Promoted Synthesis of Piperidyl-Modified erythro-Methylphenidate Derivatives. ACS CENTRAL SCIENCE 2023; 9:1775-1783. [PMID: 37780360 PMCID: PMC10540299 DOI: 10.1021/acscentsci.3c00556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Indexed: 10/03/2023]
Abstract
Due to its efficacy as a dopamine receptor agonist, methylphenidate (MPH) is of interest as a potential therapeutic for cocaine addiction. While numerous derivatives of MPH have been investigated for their potential medicinal value, functionalization of the piperidine ring has not been explored. The pyridine borane ligand in WTp(NO)(PMe3)(η2-pyBH3) is dearomatized by the metal and can be elaborated to the analogous η2-mesylpyridinium complex. Installing a methyl phenylacetate moiety at the C2' position via a Reformatsky reaction followed by a tandem protonation/nucleophilic addition sequence results in a library of erythro MPH analogues functionalized at the piperidyl C5' position. The functional group is added chemoselectively to C5', cis to the methyl phenylacetate. Repeating this procedure with an enantioenriched source of the tungsten reagent results in enantioenriched MPH derivatives. All identities of the newly reported compounds are supported by comprehensive 2D NMR and HRMS data or crystallographic data.
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Affiliation(s)
| | | | - Justin H. Wilde
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Rachel F. Lombardo
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Earl C. Ashcraft
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Diane A. Dickie
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - W. Dean Harman
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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4
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Wei S, Zhang G, Wang Y, You M, Wang Y, Zhou L, Zhang Z. Modular synthesis of unsaturated aza-heterocycles via copper catalyzed multicomponent cascade reaction. iScience 2023; 26:106137. [PMID: 36895640 PMCID: PMC9988680 DOI: 10.1016/j.isci.2023.106137] [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: 08/31/2022] [Revised: 12/13/2022] [Accepted: 01/31/2023] [Indexed: 02/11/2023] Open
Abstract
The unsaturated aza-heterocycles such as tetrahydropyridines pose significant applications in both drug discovery and development. However, the methods to construct polyfunctionalized tetrahydropyridines are still limited. Herein, we report a modular synthesis of tetrahydropyridines via copper catalyzed multicomponent radical cascade reaction. The reaction features mild conditions and broad substrate scope. In addition, the reaction could scale up to gram scale with similar yield. A variety of 1,2,5,6-tetrahydropyridines with C3 and C5 substituents could be assembled from simple starting materials. More importantly, the products could serve as versatile intermediate to access various functionalized aza-heterocycles which further demonstrates its utility.
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Affiliation(s)
- Siqi Wei
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, China
| | - Guocong Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, China
| | - Yahui Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, China
| | - Mengwei You
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, China
| | - Yanan Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, China
| | - Liejin Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, China
| | - Zuxiao Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, China
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5
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Kondoh A, Ojima R, Terada M. Formal Fluorinative Ring Opening of 2-Benzoylpyrrolidines Utilizing [1,2]-Phospha-Brook Rearrangement for Synthesis of 2-Aryl-3-fluoropiperidines. Org Lett 2021; 23:7894-7899. [PMID: 34585940 DOI: 10.1021/acs.orglett.1c02907] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A ring expansion of 2-benzoylpyrrolidines, which involves the formal fluorinative ring opening utilizing the [1,2]-phospha-Brook rearrangement under Brønsted base catalysis and a subsequent intramolecular reductive amination, was developed. The operationally simple three-step protocol provides an efficient access to 2-aryl-3-fluoropiperidines. The methodology was further applied to the syntheses of azepanes and tetrahydroquinolines.
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Affiliation(s)
- Azusa Kondoh
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Rihaku Ojima
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Masahiro Terada
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
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6
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Heusler A, Fliege J, Wagener T, Glorius F. Substituted Dihydropyridine Synthesis by Dearomatization of Pyridines. Angew Chem Int Ed Engl 2021; 60:13793-13797. [PMID: 33830616 PMCID: PMC8252501 DOI: 10.1002/anie.202104115] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Indexed: 01/18/2023]
Abstract
Dearomatization is an effective method to transform readily available N-heterocycles into partially saturated motifs. Manipulation of dihydro-derivatives holds great potential and provides access to a variety of semi-saturated N-heterocyclic building blocks. However, current strategies are limited in scope and the use of sensitive reagents restricts the applicability in synthetic laboratories. Herein, we report the synthesis of a broad variety of N-substituted 1,4- and 1,2-dihydropyridines by very mild and selective reduction with amine borane for the first time.
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Affiliation(s)
- Arne Heusler
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität MünsterCorrensstrasse 4048149MünsterGermany
| | - Julian Fliege
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität MünsterCorrensstrasse 4048149MünsterGermany
| | - Tobias Wagener
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität MünsterCorrensstrasse 4048149MünsterGermany
| | - Frank Glorius
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität MünsterCorrensstrasse 4048149MünsterGermany
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7
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Heusler A, Fliege J, Wagener T, Glorius F. Synthese substituierter Dihydropyridine durch Dearomatisierung von Pyridinen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104115] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Arne Heusler
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Julian Fliege
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Tobias Wagener
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Frank Glorius
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
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8
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Dongbang S, Confair DN, Ellman JA. Rhodium-Catalyzed C-H Alkenylation/Electrocyclization Cascade Provides Dihydropyridines That Serve as Versatile Intermediates to Diverse Nitrogen Heterocycles. Acc Chem Res 2021; 54:1766-1778. [PMID: 33740369 PMCID: PMC8026680 DOI: 10.1021/acs.accounts.1c00027] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Nitrogen heterocycles are present in approximately 60% of drugs, with nonplanar heterocycles incorporating stereogenic centers being of considerable interest to the fields of medicinal chemistry, chemical biology, and synthetic methods development. Over the past several years, our laboratory has developed synthetic strategies to access highly functionalized nitrogen heterocycles with multiple stereogenic centers. This approach centers on the efficient preparation of diverse 1,2-dihydropyridines by a Rh-catalyzed C-H bond alkenylation/electrocyclization cascade from readily available α,β-unsaturated imines and alkynes. The often densely substituted 1,2-dihydropyridine products have proven to be extremely versatile intermediates that can be elaborated with high regioselectivity and stereoselectivity, often without purification or even isolation. Protonation or alkylation followed by addition of hydride or carbon nucleophiles affords tetrahydropyridines with divergent regioselectivity and stereoselectivity depending on the reaction conditions. Mechanistic experiments in combination with density functional theory (DFT) calculations provide a rationale for the high level of regiocontrol and stereocontrol that is observed. Further elaboration of the tetrahydropyridines by diastereoselective epoxidation and regioselective ring opening furnishes hydroxy-substituted piperidines. Alternatively, piperidines can be obtained directly from dihydropyridines by catalytic hydrogenation in good yields with high face selectivity.When trimethylsilyl alkynes or N-trimethylsilylmethyl imines are employed as starting inputs, the Rh-catalyzed C-H bond alkenylation/electrocyclization cascade provides silyl-substituted dihydropyridines that enable a host of new and useful transformations to different heterocycle classes. Protonation of these products under acidic conditions triggers the loss of the silyl group and the formation of unstabilized azomethine ylides that would be difficult to access by other means. Depending on the location of the silyl group, [3 + 2] cycloaddition of the azomethine ylides with dipolarophiles provides tropane or indolizidine privileged frameworks, which for intramolecular cycloadditions yield complex polycyclic products with up to five contiguous stereogenic centers. When different types of conditions are employed, loss of the silyl group can result in either rearrangement to cyclopropyl-fused pyrrolidines or to aminocyclopentadienes. Mechanistic experiments supported by DFT calculations provide reaction pathways for these unusual rearrangements.The transformations described in this Account are amenable to natural product synthesis and drug discovery applications because of the biological relevance of the structural motifs that are prepared, short reaction sequences that rely on readily available starting inputs, high regiocontrol and stereocontrol, and excellent functional group compatibility. For example, the methods have been applied to efficient asymmetric syntheses of morphinan drugs, including the opioid antagonist (-)-naltrexone, which is extensively used for the treatment of drug abuse.
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Affiliation(s)
- Sun Dongbang
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Danielle N Confair
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Jonathan A Ellman
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
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9
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Anand PS, Sethukumar A, Kumar CU, Krishnasamy K, Senthan S, Manikandan G, Prakasam BA. Synthesis, stereochemical, single crystal X-ray structural and antimicrobial studies of some isobutyl-1,2,6-triaryl-4-(arylamino)-1,2,5,6-tetrahydropyridine-3-carboxylates: Exploring RAHB with S(6) graph set. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129563] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Lumbroso A, Berthonneau C, Beaudet I, Quintard JP, Planchat A, García-Moreno MI, Ortiz Mellet C, Le Grognec E. A versatile stereocontrolled synthesis of 2-deoxyiminosugar C-glycosides and their evaluation as glycosidase inhibitors. Org Biomol Chem 2021; 19:1083-1099. [PMID: 33427829 DOI: 10.1039/d0ob02249g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A highly enantioselective synthesis of (R,S) or (S,S)-2,6-disubstituted dehydropiperidines has been previously achieved through Sn/Li transmetalation of the corresponding stannylated dehydropiperidines or of their precursors. Herein, we successively consider their Upjohn's syn dihydroxylation and their anti-dihydroxylation via an epoxidation reaction followed by epoxide opening reaction. The stereochemical course of these reactions was first reported including the use of appropriate protecting groups before considering the conversion of the obtained compounds into NH or NMe iminosugar hydrochlorides. A primary evaluation of the designed iminosugar C-glycosides as glycosidase inhibitors suggests candidates for the selective inhibition of α-galactosidase, amyloglycosidase and naringinase. Beyond the reported results, the method constitutes a highly modulable route for the synthesis of well stereodefined iminosugar C-glycosides, an advantage which might be used for the design of iminosugars to enhance their biological properties.
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11
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Visseq A, Boibessot T, Nauton L, Théry V, Anizon F, Abrunhosa-Thomas I. Diastereoselective Synthesis of 2,6-Disubstituted-1,2,3,6-Tetrahydropyridines through a Palladium-Catalyzed Intramolecular Allylic Amination. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901520] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Alexia Visseq
- Université Clermont Auvergne; CNRS; SIGMA Clermont; Institut de Chimie de Clermont-Ferrand; 63000 Clermont-Ferrand France
| | - Thibaut Boibessot
- Université Clermont Auvergne; CNRS; SIGMA Clermont; Institut de Chimie de Clermont-Ferrand; 63000 Clermont-Ferrand France
| | - Lionel Nauton
- Université Clermont Auvergne; CNRS; SIGMA Clermont; Institut de Chimie de Clermont-Ferrand; 63000 Clermont-Ferrand France
| | - Vincent Théry
- Université Clermont Auvergne; CNRS; SIGMA Clermont; Institut de Chimie de Clermont-Ferrand; 63000 Clermont-Ferrand France
| | - Fabrice Anizon
- Université Clermont Auvergne; CNRS; SIGMA Clermont; Institut de Chimie de Clermont-Ferrand; 63000 Clermont-Ferrand France
| | - Isabelle Abrunhosa-Thomas
- Université Clermont Auvergne; CNRS; SIGMA Clermont; Institut de Chimie de Clermont-Ferrand; 63000 Clermont-Ferrand France
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12
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Hugelshofer CL, Palani V, Sarpong R. Calyciphylline B-type Alkaloids: Evolution of a Synthetic Strategy to (−)-Daphlongamine H. J Org Chem 2019; 84:14069-14091. [DOI: 10.1021/acs.joc.9b02223] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cedric L. Hugelshofer
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
| | - Vignesh Palani
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
| | - Richmond Sarpong
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
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13
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Chen S, Chan AY, Walker MM, Ellman JA, Houk KN. π-Facial Selectivities in Hydride Reductions of Hindered Endocyclic Iminium Ions. J Org Chem 2019; 84:273-281. [PMID: 30516383 DOI: 10.1021/acs.joc.8b02603] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The origins of π-facial selectivities in the borohydride reduction of endocyclic iminium ions have been elucidated by density functional theory calculations. In reductions of conjugated ("thermodynamic") iminium ions, the π-facial preference of the hydride attack was found to be due to torsional steering. Attack at the favored π-face leads to a lower-energy "half-chair"-like conformation of the tetrahydropyridine product, whereas attack at the other π-face results in an unfavorable "twist-boat" conformation. In reductions of nonconjugated ("kinetic") iminium ions, torsional distinction is small between the top- and bottom-face attacks, and the π-facial selectivity of the hydride approach is primarily due to steric hindrance.
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Affiliation(s)
- Shuming Chen
- Department of Chemistry and Biochemistry , University of California , Los Angeles , California 90095-1569 , United States
| | - Amy Y Chan
- Department of Chemistry , Yale University , New Haven , Connecticut 06520 , United States
| | - Morgan M Walker
- Department of Chemistry , Yale University , New Haven , Connecticut 06520 , United States
| | - Jonathan A Ellman
- Department of Chemistry , Yale University , New Haven , Connecticut 06520 , United States
| | - K N Houk
- Department of Chemistry and Biochemistry , University of California , Los Angeles , California 90095-1569 , United States
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14
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Berti F, Menichetti A, Favero L, Marchetti F, Pineschi M. Regio- and Stereodivergent Allylic Reductions of Bicyclic Piperidine Enecarbamate Derivatives. J Org Chem 2018; 83:12221-12228. [PMID: 30212634 DOI: 10.1021/acs.joc.8b01601] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The particular nature of tetrahydropyrido[4,3- e]-1,4,2-dioxazines of type 1 allows the regio- and stereoselective obtainment of substituted N-carbamoyl tetrahydropyridines by common reducing agents. A completely novel, biologically active, bicyclic 1,3-diaza-4-oxa-[3.3.1]-nonene scaffold can be generated by the use of lithium triethylborohydride through unprecedented cascade syn-SN2' reduction/carbamate reduction/cyclization reactions. The remarkable regioselectivity switches in the allylic reduction process have been rationalized with the aid of computational studies.
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Affiliation(s)
- Francesco Berti
- Dipartimento di Farmacia, Sede di Chimica Bioorganica e Biofarmacia , Università di Pisa , Via Bonanno 33 , 56126 Pisa , Italy
| | - Andrea Menichetti
- Dipartimento di Farmacia, Sede di Chimica Bioorganica e Biofarmacia , Università di Pisa , Via Bonanno 33 , 56126 Pisa , Italy
| | - Lucilla Favero
- Dipartimento di Farmacia, Sede di Chimica Bioorganica e Biofarmacia , Università di Pisa , Via Bonanno 33 , 56126 Pisa , Italy
| | - Fabio Marchetti
- Dipartimento di Chimica e Chimica Industriale , Università di Pisa , via G. Moruzzi 3 , 56124 , Pisa , Italy
| | - Mauro Pineschi
- Dipartimento di Farmacia, Sede di Chimica Bioorganica e Biofarmacia , Università di Pisa , Via Bonanno 33 , 56126 Pisa , Italy
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15
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Asadi B, Landarani-Isfahani A, Mohammadpoor-Baltork I, Tangestaninejad S, Moghadam M, Mirkhani V, Amiri Rudbari H. Diastereoselective Synthesis of Symmetrical and Unsymmetrical Tetrahydropyridines Catalyzed by Bi(III) Immobilized on Triazine Dendrimer Stabilized Magnetic Nanoparticles. ACS COMBINATORIAL SCIENCE 2017; 19:356-364. [PMID: 28485568 DOI: 10.1021/acscombsci.6b00180] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Unsymmetrical 1,2,5,6-tetrahydropyridine-3-carboxylates were obtained for the first time from a five-component Fe3O4@TDSN-Bi(III)-catalyzed reaction of aryl aldehydes, aryl amines, and ethyl acetoacetate. This magnetically separable catalyst enabled the selective incorporation of two different aryl amines or two different aryl aldehydes into the product, and provided excellent yields, short reaction times, mild reaction conditions, satisfactory catalyst recyclability, and low catalyst loading.
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Affiliation(s)
- Beheshteh Asadi
- Catalysis Division, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | - Amir Landarani-Isfahani
- Catalysis Division, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | | | - Shahram Tangestaninejad
- Catalysis Division, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | - Majid Moghadam
- Catalysis Division, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | - Valiollah Mirkhani
- Catalysis Division, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | - Hadi Amiri Rudbari
- Catalysis Division, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
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16
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Asadi B, Landarani-Isfahani A, Mohammadpoor-Baltork I, Tangestaninejad S, Moghadam M, Mirkhani V, Amiri Rudbari H. Diastereoselective Synthesis of Symmetrical and Unsymmetrical Tetrahydropyridines Catalyzed by Bi(III) Immobilized on Triazine Dendrimer Stabilized Magnetic Nanoparticles. ACS COMBINATORIAL SCIENCE 2017. [DOI: 10.1021/acscombsci.6b00180 pmid: 28485568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Beheshteh Asadi
- Catalysis Division, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | - Amir Landarani-Isfahani
- Catalysis Division, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | | | - Shahram Tangestaninejad
- Catalysis Division, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | - Majid Moghadam
- Catalysis Division, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | - Valiollah Mirkhani
- Catalysis Division, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | - Hadi Amiri Rudbari
- Catalysis Division, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
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17
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Dhinakaran I, Padmini V, Bhuvanesh N. Chemodivergent, One-Pot, Multi-Component Synthesis of Pyrroles and Tetrahydropyridines under Solvent- and Catalyst-Free Conditions Using the Grinding Method. ACS COMBINATORIAL SCIENCE 2016; 18:236-42. [PMID: 26972275 DOI: 10.1021/acscombsci.5b00154] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A highly efficient, chemoselective synthesis of a library of polysubstituted pyrroles and tetrahydropyridines has been achieved through the one-pot, multicomponent reactions of ethyl (E)-3-(aryl/alkyl amino) acrylates, 2,2-dihydroxy-1-arylethan-1-ones, and malononitrile under solvent- and catalyst-free grinding conditions. The selective formation of pyrrole or tetrahydropyridines relied on substitution of the N-aryl of ethyl (E)-3-(4-arylamino) acrylates. These reactions presumably occurred via a domino Knoevenagel condensation and Michael addition followed by an intramolecular cyclization sequence of reactions in a single transformation.
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Affiliation(s)
- Isaivani Dhinakaran
- Department
of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, Tamil Nadu, India
| | - Vediappen Padmini
- Department
of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, Tamil Nadu, India
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States
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18
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Csatayová K, Davies SG, Figuccia AL, Fletcher AM, Ford JG, Lee JA, Roberts PM, Saward BG, Song H, Thomson JE. Asymmetric syntheses of polysubstituted homoprolines and homoprolinols. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.10.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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19
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Wanner B, Kreituss I, Gutierrez O, Kozlowski MC, Bode JW. Catalytic Kinetic Resolution of Disubstituted Piperidines by Enantioselective Acylation: Synthetic Utility and Mechanistic Insights. J Am Chem Soc 2015; 137:11491-7. [PMID: 26308097 PMCID: PMC4601563 DOI: 10.1021/jacs.5b07201] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The catalytic kinetic resolution of cyclic amines with achiral N-heterocyclic carbenes and chiral hydroxamic acids has emerged as a promising method to obtain enantio-enriched amines with high selectivity factors. In this report, we describe the catalytic kinetic resolution of disubstituted piperdines with practical selectivity factors (s, up to 52) in which we uncovered an unexpected and pronounced conformational effect resulting in disparate reactivity and selectivity between the cis- and trans-substituted piperidine isomers. Detailed experimental and computational studies of the kinetic resolution of various disubstituted piperidines revealed a strong preference for the acylation of conformers in which the α-substituent occupies the axial position. This work provides further experimental and computational support for the concerted 7-member transition state model for acyl transfer reagents and expands the scope and functional group tolerance of the secondary amine kinetic resolution.
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Affiliation(s)
- Benedikt Wanner
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093 Zürich, Switzerland
| | - Imants Kreituss
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093 Zürich, Switzerland
| | - Osvaldo Gutierrez
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Marisa C. Kozlowski
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Jeffrey W. Bode
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093 Zürich, Switzerland
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