1
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Beng TK, Kaur J, Anosike IS, Rentfro B, Newgard S. Revisiting the 1,3-azadiene-succinic anhydride annulation reaction for the stereocontrolled synthesis of allylic 2-oxopyrrolidines bearing up to four contiguous stereocenters. RSC Adv 2024; 14:16678-16684. [PMID: 38784414 PMCID: PMC11110166 DOI: 10.1039/d4ra03156c] [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: 04/28/2024] [Accepted: 05/15/2024] [Indexed: 05/25/2024] Open
Abstract
Polysubstituted 2-oxopyrrolidines bearing at least two contiguous stereocenters constitute the core of several pharmaceuticals, including clausenamide (antidementia). Here, we describe a flexible annulation strategy, which unites succinic anhydride and 1,3-azadienes to produce allylic 2-oxopyrrolidines bearing contiguous stereocenters. The approach is chemoselective, efficient, modular, scalable, and diastereoselective. The scalable nature of the reactions offers the opportunity for post-diversification, leading to incorporation of motifs with either known pharmaceutical value or that permit subsequent conversion to medicinally relevant entities.
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Affiliation(s)
- Timothy K Beng
- Department of Chemistry, Central Washington University Ellensburg WA 98926 USA
| | - Jasleen Kaur
- Department of Chemistry, Central Washington University Ellensburg WA 98926 USA
| | - Ifeyinwa S Anosike
- Department of Chemistry, Central Washington University Ellensburg WA 98926 USA
| | - Benjamin Rentfro
- Department of Chemistry, Central Washington University Ellensburg WA 98926 USA
| | - Shae Newgard
- Department of Chemistry, Central Washington University Ellensburg WA 98926 USA
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2
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G.-Simonian N, Spieß P, Riomet M, Maryasin B, Klose I, Beaton Garcia A, Pollesböck L, Kaldre D, Todorovic U, Minghua Liu J, Kaiser D, González L, Maulide N. Stereodivergent Synthesis of 1,4-Dicarbonyl Compounds through Sulfonium Rearrangement: Mechanistic Investigation, Stereocontrolled Access to γ-Lactones and γ-Lactams, and Total Synthesis of Paraconic Acids. J Am Chem Soc 2024; 146:13914-13923. [PMID: 38741029 PMCID: PMC11117187 DOI: 10.1021/jacs.4c01755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Revised: 04/25/2024] [Accepted: 04/26/2024] [Indexed: 05/16/2024]
Abstract
Although simple γ-lactones and γ-lactams have received considerable attention from the synthetic community, particularly due to their relevance in biological and medicinal contexts, stereoselective synthetic approaches to more densely substituted derivatives remain scarce. The in-depth study presented herein, showcasing a straightforward method for the stereocontrolled synthesis of γ-lactones and γ-lactams, builds on and considerably expands the stereodivergent synthesis of 1,4-dicarbonyl compounds by a ynamide/vinyl sulfoxide coupling. A full mechanistic and computational study of the rearrangement was conducted, uncovering the role of all of the reaction components and providing a rationale for stereoselection. The broad applicability of the developed tools to streamlining synthesis is demonstrated by concise enantioselective total syntheses of (+)-nephrosteranic acid, (+)-rocellaric acid, and (+)-nephromopsinic acid.
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Affiliation(s)
- Nicolas G.-Simonian
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Philipp Spieß
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Margaux Riomet
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Boris Maryasin
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
- Institute
of Theoretical Chemistry, University of
Vienna, Währinger
Straße 17, 1090 Vienna, Austria
| | - Immo Klose
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Alexander Beaton Garcia
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Laurin Pollesböck
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Dainis Kaldre
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Uroš Todorovic
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Julia Minghua Liu
- Institute
of Theoretical Chemistry, University of
Vienna, Währinger
Straße 17, 1090 Vienna, Austria
| | - Daniel Kaiser
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Leticia González
- Institute
of Theoretical Chemistry, University of
Vienna, Währinger
Straße 17, 1090 Vienna, Austria
| | - Nuno Maulide
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
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3
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Ramiro JL, Martínez-Caballero S, Neo AG, Díaz J, Marcos CF. The Castagnoli–Cushman Reaction. Molecules 2023; 28:molecules28062654. [PMID: 36985626 PMCID: PMC10058692 DOI: 10.3390/molecules28062654] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/11/2023] [Accepted: 03/12/2023] [Indexed: 03/17/2023] Open
Abstract
Since the first reports of the reaction of imines and cyclic anhydrides by Castagnoli and Cushman, this procedure has been applied to the synthesis of a variety of lactams, some of them with important synthetic or biological interest. The scope of the reaction has been extended to the use of various Schiff bases and anhydrides as well as to different types of precursors for these reagents. In recent years, important advances have been made in understanding the mechanism of the reaction, which has historically been quite controversial. This has helped to develop reaction conditions that lead to pure diastereomers and even homochiral products. In addition, these mechanistic studies have also led to the development of new multicomponent versions of the Castagnoli–Cushman reaction that allow products with more diverse and complex molecular structures to be easily obtained.
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Affiliation(s)
- José Luis Ramiro
- Laboratory of Bioorganic Chemistry & Membrane Biophysics (L.O.B.O.), Departamento de Química Orgánica e Inorgánica, Facultad de Veterinaria, Universidad de Extremadura, 10003 Cáceres, Spain
| | - Sonia Martínez-Caballero
- Departamento de Didáctica de las Ciencias Experimentales y las Matemáticas, Facultad de Formación de Profesorado, Universidad de Extremadura, 10003 Cáceres, Spain
| | - Ana G. Neo
- Laboratory of Bioorganic Chemistry & Membrane Biophysics (L.O.B.O.), Departamento de Química Orgánica e Inorgánica, Facultad de Veterinaria, Universidad de Extremadura, 10003 Cáceres, Spain
- Correspondence: (A.G.N.); (C.F.M.)
| | - Jesús Díaz
- Laboratory of Bioorganic Chemistry & Membrane Biophysics (L.O.B.O.), Departamento de Química Orgánica e Inorgánica, Facultad de Veterinaria, Universidad de Extremadura, 10003 Cáceres, Spain
| | - Carlos F. Marcos
- Laboratory of Bioorganic Chemistry & Membrane Biophysics (L.O.B.O.), Departamento de Química Orgánica e Inorgánica, Facultad de Veterinaria, Universidad de Extremadura, 10003 Cáceres, Spain
- Correspondence: (A.G.N.); (C.F.M.)
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4
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Guranova N, Bakulina O, Dar'in D, Kantin G, Krasavin M. Homophthalic Monoesters: A New Type of Reagents for the Castagnoli‐Cushman Reaction. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Olga Bakulina
- Saint Petersburg State University Chemistry RUSSIAN FEDERATION
| | - Dmitry Dar'in
- Saint Petersburg State University Chemistry RUSSIAN FEDERATION
| | - Grigory Kantin
- Saint Petersburg State University: Sankt-peterburgskij gosudarstvennyj universitet Chemistry RUSSIAN FEDERATION
| | - Mikhail Krasavin
- Saint Petersburg State University Chemistry 26 Universitetskyi Prospekt 198504 Peterhof RUSSIAN FEDERATION
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5
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Firsov A, Bakulina O, Dar'in D, Sokolov VV, Krasavin M. Synthesis of γ-Sultam-Annelated δ-Lactams via the Castagnoli-Cushman Reaction of Sultam-Based Dicarboxylic Acids. J Org Chem 2022; 87:1537-1540. [PMID: 35000381 DOI: 10.1021/acs.joc.1c02456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An unusual type of highly reactive sultam-based dicarboxylic acids and correscponding anhydrides was employed in the Castagnoli-Cushman reaction delivering diastereomerically pure adducts at room temperature. Due to steric congestion, the initial adducts were prone to decarboxylation affording diastereomeric mixtures of bicyclic sultam lactams, separable by HPLC. The choice of a protecting group on the sultam nitrogen atom allows liberation of the NH-sultam, which is not only suitable for further modification but represents a known pharmacophore for carbonic anhydrase inhibition.
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Affiliation(s)
- Andrey Firsov
- Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
| | - Olga Bakulina
- Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
| | - Dmitry Dar'in
- Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
| | - Viktor V Sokolov
- Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
| | - Mikhail Krasavin
- Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
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6
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Howard SY, Di Maso MJ, Shimabukuro K, Burlow NP, Tan DQ, Fettinger JC, Malig TC, Hein JE, Shaw JT. Mechanistic Investigation of Castagnoli-Cushman Multicomponent Reactions Leading to a Three-Component Synthesis of Dihydroisoquinolones. J Org Chem 2021; 86:11599-11607. [PMID: 34351161 DOI: 10.1021/acs.joc.1c01163] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mechanisms for the three- and four-component variants of the Castagnoli-Cushman reaction (CCR) have been investigated. A series of crossover experiments were conducted to probe the structure and reactivity of known amide-acid intermediates for the three- and four-component variants of the CCR (3CR and 4CR, respectively). Control experiments paired with in situ reaction monitoring with infrared spectroscopy for the 4CR align with a mechanism in which amide-acids derived from maleic anhydride can reversibly form free amine and cyclic anhydride. Although this equilibrium is unfavorable, the aldehyde present can trap the primary amine through imine formation and react with the enol form of the anhydride through a Mannich-like mechanism. This detailed mechanistic investigation coupled with additional crossover experiments supports an analogous mechanism for the 3CR and has led to the elucidation of new 3CR conditions with homophthalic anhydride, amines, and aldehydes for the formation of dihydroisoquinolones in good yields and excellent diastereoselectivity. This work represents the culmination of more than a decade of mechanistic speculation for the 3- and 4CR, enabling the design of new multicomponent reactions that exploit this novel mechanism.
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Affiliation(s)
- Sara Y Howard
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Michael J Di Maso
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Kristin Shimabukuro
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Noah P Burlow
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Darlene Q Tan
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - James C Fettinger
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Thomas C Malig
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada V6T 1Z1
| | - Jason E Hein
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada V6T 1Z1
| | - Jared T Shaw
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
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7
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Pashev A, Burdzhiev N, Stanoeva E. One-step route to tricyclic fused 1,2,3,4-tetrahydroisoquinoline systems via the Castagnoli-Cushman protocol. Beilstein J Org Chem 2020; 16:1456-1464. [PMID: 32647547 PMCID: PMC7323625 DOI: 10.3762/bjoc.16.121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 06/09/2020] [Indexed: 11/29/2022] Open
Abstract
The Castagnoli-Cushman reaction of 3,4-dihydroisoquinolines with glutaric anhydride, its oxygen and sulfur analogues was investigated as a one-step approach to the benzo[a]quinolizidine system and its heterocyclic analogs. An extension towards the pyrrolo[2,1-a]isoquinoline system was achieved with the use of succinic anhydride. The results are evidence of an unexplored method for the access of the aforementioned tricyclic annelated systems incorporating a bridgehead nitrogen atom. The structures and relative configurations of the new compounds were established by means of 1D and 2D NMR techniques. The reactions between 1-methyldihydroisoquinoline and glutaric, diglycolic and succinic anhydrides yielded unexpected isoquinoline derivatives containing an exocyclic double bond. The compounds prepared bear the potential to become building blocks for future synthetic bioactive molecules.
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Affiliation(s)
- Aleksandar Pashev
- Sofia University “St. Kliment Ohridski”, Faculty of Chemistry and Pharmacy, 1, James Bourchier ave., 1164 Sofia, Bulgaria
- Medical University Pleven, Faculty of Pharmacy, 1, St. Kliment Ohridski str., 5800 Pleven, Bulgaria
| | - Nikola Burdzhiev
- Sofia University “St. Kliment Ohridski”, Faculty of Chemistry and Pharmacy, 1, James Bourchier ave., 1164 Sofia, Bulgaria
| | - Elena Stanoeva
- Sofia University “St. Kliment Ohridski”, Faculty of Chemistry and Pharmacy, 1, James Bourchier ave., 1164 Sofia, Bulgaria
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8
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Laws SW, Howard SY, Mato R, Meng S, Fettinger JC, Shaw JT. Organocatalytic Mukaiyama Mannich Reactions of 2,5-Bis(trimethylsilyloxy)furan. Org Lett 2019; 21:5073-5077. [PMID: 31247788 DOI: 10.1021/acs.orglett.9b01664] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The organocatalytic synthesis of densely substituted mono- and bis-γ-lactams involving the Mukaiyama Mannich addition of 2,5-bis(trimethylsilyloxy)furan to imines is described. Use of a ditoluenesulfonylimide catalyst produces γ-lactams from monoaddition, whereas a more acidic catalyst (triflic acid) produces fused bis-lactams from double addition. Optimized organocatalytic conditions allow for the selective synthesis of either desired core as well as the one-pot, multicomponent assembly of the trisubstituted monolactams from aldehydes, amines, and bis-trimethylsilyloxyfuran. An examination of chiral acids found these organocatalysts to be highly active and diastereoselective in the monoaddition reaction, albeit with no enantioselectivity.
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Affiliation(s)
- Stephen W Laws
- Department of Chemistry , University of California , One Shields Ave , Davis , California 95616 , United States
| | - Sara Y Howard
- Department of Chemistry , University of California , One Shields Ave , Davis , California 95616 , United States
| | - Raquel Mato
- Department of Chemistry , University of California , One Shields Ave , Davis , California 95616 , United States
| | - Shuyu Meng
- Department of Chemistry , University of California , One Shields Ave , Davis , California 95616 , United States
| | - James C Fettinger
- Department of Chemistry , University of California , One Shields Ave , Davis , California 95616 , United States
| | - Jared T Shaw
- Department of Chemistry , University of California , One Shields Ave , Davis , California 95616 , United States
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9
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Collar AG, Trujillo C, Connon SJ. Highly Enantio- and Diastereoselective Catalytic Asymmetric Tamura Cycloaddition Reactions. Chemistry 2019; 25:7270-7274. [PMID: 31050071 DOI: 10.1002/chem.201900119] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Indexed: 12/22/2022]
Abstract
The first broad-scope catalytic asymmetric Tamura cycloaddition reactions are reported. Under the influence of anion-binding bifunctional catalysis a wide range of α,β-unsaturated N-trityl imines undergo reactions with enolisable anhydrides to form highly synthetically useful α-tetralone structures with excellent enantio- and -diastereocontrol. In stark contrast to the previous literature benchmarks, doubly activated or highly electron deficient alkenes are not required. A facile two-step, high yielding sequence can convert the cycloadducts to α-haloketones (challenging to generate catalytically by other means) with the net formation of two new C-C bonds and three new contiguous stereocentres with exquisite stereocontrol. A DFT study has provided insight into the catalyst mode of action and the origins of the observed enantiocontrol.
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Affiliation(s)
- Aarón Gutiérrez Collar
- School of Chemistry Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin, 2, Ireland
| | - Cristina Trujillo
- School of Chemistry Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin, 2, Ireland
| | - Stephen J Connon
- School of Chemistry Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin, 2, Ireland
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10
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Firsov A, Chupakhin E, Dar'in D, Bakulina O, Krasavin M. Three-Component Castagnoli-Cushman Reaction of 3-Arylglutaconic Acids with Aromatic Aldehydes and Amines Delivers Rare 4,6-Diaryl-1,6-dihydropyridin-2(3 H)-ones. Org Lett 2019; 21:1637-1640. [PMID: 30794425 DOI: 10.1021/acs.orglett.9b00171] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Attempted use of 3-arylglutaconic acids in the three-component version of the Castagnoli-Cushman reaction with amines and aromatic aldehydes resulted in an unexpected formation of 4,6-diaryl 1,6-dihydropyridine-2(3 H)-ones. These are of interest as representatives of a rare heterocyclic chemotype for de novo biological investigation. Alternatively, these compounds can be oxidized into their 2-pyridone counterparts, stereoselectively reduced to give cis-configured 4,6-diaryl 2-piperidones, or isomerized to 5,6-dihydropyridin-2(1 H)-ones. All the three scaffolds are well represented in the bioactive compound domain.
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Affiliation(s)
- Andrei Firsov
- Saint Petersburg State University , Saint Petersburg 199034 , Russian Federation
| | - Evgeny Chupakhin
- Saint Petersburg State University , Saint Petersburg 199034 , Russian Federation.,Immanuel Kant Baltic Federal University , Kaliningrad 236016 , Russian Federation
| | - Dmitry Dar'in
- Saint Petersburg State University , Saint Petersburg 199034 , Russian Federation
| | - Olga Bakulina
- Saint Petersburg State University , Saint Petersburg 199034 , Russian Federation
| | - Mikhail Krasavin
- Saint Petersburg State University , Saint Petersburg 199034 , Russian Federation.,Immanuel Kant Baltic Federal University , Kaliningrad 236016 , Russian Federation
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11
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Chizhova M, Khoroshilova O, Dar'in D, Krasavin M. Unusually Reactive Cyclic Anhydride Expands the Scope of the Castagnoli-Cushman Reaction. J Org Chem 2018; 83:12722-12733. [PMID: 30226770 DOI: 10.1021/acs.joc.8b02164] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In the course of synthesizing and testing various "azole-including" cyclic anhydrides in the Castagnoli-Cushman reaction with imines, a remarkably reactive, pyrrole-based anhydride has been identified. It displayed a remarkably efficient reaction with N-alkyl and N-aryl imines, in particular, with "enolizable" α-C-H imines which typically fail to react with a majority of known cyclic anhydrides. The reactivity of this anhydride has been justified by an efficient resonance stabilization of its enol form. This finding expands the existing arsenal of highly reactive cyclic anhydrides and further confirms the importance of anhydride enolization for an efficient Castagnoli-Cushman reaction.
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Affiliation(s)
- Maria Chizhova
- Saint Petersburg State University , Saint Petersburg , 199034 Russian Federation
| | - Olesya Khoroshilova
- Saint Petersburg State University , Saint Petersburg , 199034 Russian Federation
| | - Dmitry Dar'in
- Saint Petersburg State University , Saint Petersburg , 199034 Russian Federation
| | - Mikhail Krasavin
- Saint Petersburg State University , Saint Petersburg , 199034 Russian Federation
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12
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Jarvis CL, Jemal NM, Knapp S, Seidel D. Formal [4 + 2] cycloaddition of imines with alkoxyisocoumarins. Org Biomol Chem 2018; 16:4231-4235. [PMID: 29796555 PMCID: PMC6082175 DOI: 10.1039/c8ob01015c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new preparation of δ-lactams is reported. In the presence of a Lewis acid promoter, alkoxyisocoumarins engage a range of N-aryl and N-alkyl imines to form δ-lactams with a pendent carboalkoxy substituent. A sulfonamide-thiourea catalyst enables the synthesis of these products in moderate to good enantioselectivities.
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Affiliation(s)
- Claire L Jarvis
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA.
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13
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Abstract
Homophthalic anhydride (HPA) typically reacts rapidly with benzalimines to afford the formal [4+2] adduct, a 1,2,3,4-tetrahydroisoquinolin-1-one-4-carboxylic acid. The stereochemical outcome of this reaction is consistent with an open transition state comprising an iminium species and enolized HPA, leading to a short-lived amino-anhydride intermediate. In the case of N-tert-butylbenzalimine, this Mannich-type intermediate, which would normally cyclize at low temperature to a single isomer of the delta-lactam, is intercepted by base treatment to afford beta-lactam products. A pathway featuring ketene formation followed by ring closure is implicated.
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14
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Maji R, Wheeler SE. Importance of Electrostatic Effects in the Stereoselectivity of NHC-Catalyzed Kinetic Resolutions. J Am Chem Soc 2017; 139:12441-12449. [DOI: 10.1021/jacs.7b01796] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Rajat Maji
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Steven E. Wheeler
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
- Center
for Computational Quantum Chemistry, Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
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15
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Laws SW, Moore LC, Di Maso MJ, Nguyen QNN, Tantillo DJ, Shaw JT. Diastereoselective Base-Catalyzed Formal [4 + 2] Cycloadditions of N-Sulfonyl Imines and Cyclic Anhydrides. Org Lett 2017; 19:2466-2469. [PMID: 28474515 DOI: 10.1021/acs.orglett.7b00468] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A diastereoselective base-catalyzed Mannich reaction of cyclic, enolizable anhydrides and N-sulfonyl imines for the synthesis of δ-lactams is reported. This anhydride Mannich reaction tolerates imines derived from aryl and enolizable aldehydes. A base-catalyzed product epimerization pathway ensures high anti diastereoselectivity in aryl and achiral enolizable imines.
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Affiliation(s)
- Stephen W Laws
- Department of Chemistry, University of California , One Shields Avenue, Davis, California 95616, United States
| | - Lucas C Moore
- Department of Chemistry, University of California , One Shields Avenue, Davis, California 95616, United States
| | - Michael J Di Maso
- Department of Chemistry, University of California , One Shields Avenue, Davis, California 95616, United States
| | - Q Nhu N Nguyen
- Department of Chemistry, University of California , One Shields Avenue, Davis, California 95616, United States
| | - Dean J Tantillo
- Department of Chemistry, University of California , One Shields Avenue, Davis, California 95616, United States
| | - Jared T Shaw
- Department of Chemistry, University of California , One Shields Avenue, Davis, California 95616, United States
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16
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Jarvis CL, Hirschi JS, Vetticatt MJ, Seidel D. Catalytic Enantioselective Synthesis of Lactams through Formal [4+2] Cycloaddition of Imines with Homophthalic Anhydride. Angew Chem Int Ed Engl 2017; 56:2670-2674. [DOI: 10.1002/anie.201612148] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Indexed: 01/26/2023]
Affiliation(s)
- Claire L. Jarvis
- Department of Chemistry and Chemical Biology; Rutgers, The State University of New Jersey; Piscataway NJ 08854 USA
| | | | | | - Daniel Seidel
- Department of Chemistry and Chemical Biology; Rutgers, The State University of New Jersey; Piscataway NJ 08854 USA
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17
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Jarvis CL, Hirschi JS, Vetticatt MJ, Seidel D. Catalytic Enantioselective Synthesis of Lactams through Formal [4+2] Cycloaddition of Imines with Homophthalic Anhydride. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612148] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Claire L. Jarvis
- Department of Chemistry and Chemical Biology; Rutgers, The State University of New Jersey; Piscataway NJ 08854 USA
| | | | | | - Daniel Seidel
- Department of Chemistry and Chemical Biology; Rutgers, The State University of New Jersey; Piscataway NJ 08854 USA
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18
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Trujillo C, Rozas I, Botte A, Connon SJ. A DFT mechanistic study of the organocatalytic asymmetric reaction of aldehydes and homophthalic anhydride. Chem Commun (Camb) 2017; 53:8874-8877. [DOI: 10.1039/c7cc04596d] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The first study of the cycloaddition of benzaldehyde with homophthalic anhydride under the influence of an alkaloid-based, squaramide substituted bifunctional organocatalyst using DFT methodology is reported.
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Affiliation(s)
- Cristina Trujillo
- School of Chemistry
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- Dublin 2
- Ireland
| | - Isabel Rozas
- School of Chemistry
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- Dublin 2
- Ireland
| | - Astrid Botte
- School of Chemistry
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- Dublin 2
- Ireland
| | - Stephen J. Connon
- School of Chemistry
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- Dublin 2
- Ireland
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19
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Manoni F, Farid U, Trujillo C, Connon SJ. Catalytic asymmetric Tamura cycloadditions involving nitroalkenes. Org Biomol Chem 2017; 15:1463-1474. [DOI: 10.1039/c6ob02637k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first examples of asymmetric Tamura cycloaddition reactions involving singly activated alkenes are reported.
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Affiliation(s)
- Francesco Manoni
- School of Chemistry Trinity Biomedical Sciences Institute
- Trinity College Dublin
- Dublin 2
- Ireland
| | - Umar Farid
- School of Chemistry Trinity Biomedical Sciences Institute
- Trinity College Dublin
- Dublin 2
- Ireland
| | - Cristina Trujillo
- School of Chemistry Trinity Biomedical Sciences Institute
- Trinity College Dublin
- Dublin 2
- Ireland
| | - Stephen J. Connon
- School of Chemistry Trinity Biomedical Sciences Institute
- Trinity College Dublin
- Dublin 2
- Ireland
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20
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Chizhova M, Bakulina O, Dar'in D, Krasavin M. New Dicarboxylic Acid Anhydride for Ambient-Temperature Castagnoli-Cushman Reactions. ChemistrySelect 2016. [DOI: 10.1002/slct.201601207] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Maria Chizhova
- Saint Petersburg State University; Saint Petersburg 199034 Russian Federation
| | - Olga Bakulina
- Saint Petersburg State University; Saint Petersburg 199034 Russian Federation
| | - Dmitry Dar'in
- Saint Petersburg State University; Saint Petersburg 199034 Russian Federation
| | - Mikhail Krasavin
- Saint Petersburg State University; Saint Petersburg 199034 Russian Federation
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21
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22
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Kang JY, Johnston RC, Snyder KM, Cheong PHY, Carter RG. Construction of Stereogenic α,α-Disubstituted Cycloalkanones via 1° Amine Thiourea Dual Catalysis: Experimental Scope and Computational Analyses. J Org Chem 2016; 81:3629-37. [PMID: 27095132 DOI: 10.1021/acs.joc.6b00280] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The mechanistic exploration and an expanded experimental discussion of the organocatalyzed, asymmetric Pfau-d'Angelo reaction by exploiting a bifunctional 1° amine thiourea catalyst system is disclosed. Notable breadth in substrate scope has been demonstrated on both the cyclic ketone moiety and the α,β-unsaturated electrophile. Exploration into the matched and mismatched selectivity of this process with a ketone containing pre-existing stereocenters has been demonstrated. Computational analyses of the reaction mechanism are reported. In concert with kinetic isotope effect (KIE) experiments, these computational results provide a detailed understanding of the likely mechanism, including the aspects of the organocatalyst scaffold that are critical for stereoselectivity.
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Affiliation(s)
- Jun Yong Kang
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Ryne C Johnston
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Kevin M Snyder
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Paul Ha-Yeon Cheong
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Rich G Carter
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97331, United States
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23
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Krasavin M, Dar’in D. Current diversity of cyclic anhydrides for the Castagnoli–Cushman-type formal cycloaddition reactions: prospects and challenges. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.03.021] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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24
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Di Maso MJ, Nepomuceno GM, St. Peter MA, Gitre HH, Martin KS, Shaw JT. Synthesis of (±)-Bisavenanthramide B-6 by an Anionic Anhydride Mannich Reaction. Org Lett 2016; 18:1740-3. [DOI: 10.1021/acs.orglett.6b00413] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Michael J. Di Maso
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Gabriella M. Nepomuceno
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Michael A. St. Peter
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Haley H. Gitre
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Kevin S. Martin
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Jared T. Shaw
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
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25
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Di Maso MJ, Snyder KM, De Souza Fernandes F, Pattawong O, Tan DQ, Fettinger JC, Cheong PH, Shaw JT. Diastereoselective Synthesis of and Mechanistic Understanding for the Formation of 2‐Piperidinones from Imines and Cyano‐Substituted Anhydrides. Chemistry 2016; 22:4794-801. [DOI: 10.1002/chem.201504424] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Indexed: 01/06/2023]
Affiliation(s)
- Michael J. Di Maso
- Department of Chemistry University of California, Davis One Shields Avenue Davis CA 95616 USA
| | - Kevin M. Snyder
- Department of Chemistry Oregon State University 153 Gilbert Hall Corvallis OR 97331 USA
| | - Fábio De Souza Fernandes
- Department of Chemistry University of California, Davis One Shields Avenue Davis CA 95616 USA
- Department of Chemistry Federal University of Juiz de Fora Campus Martelos Juiz de Fora MG 36036-330 Brazil
| | - Ommidala Pattawong
- Department of Chemistry Oregon State University 153 Gilbert Hall Corvallis OR 97331 USA
| | - Darlene Q. Tan
- Department of Chemistry University of California, Davis One Shields Avenue Davis CA 95616 USA
| | - James C. Fettinger
- Department of Chemistry University of California, Davis One Shields Avenue Davis CA 95616 USA
| | - Paul Ha‐Yeon Cheong
- Department of Chemistry Oregon State University 153 Gilbert Hall Corvallis OR 97331 USA
| | - Jared T. Shaw
- Department of Chemistry University of California, Davis One Shields Avenue Davis CA 95616 USA
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26
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Cornaggia C, Gundala S, Manoni F, Gopalasetty N, Connon SJ. Catalytic formal cycloadditions between anhydrides and ketones: excellent enantio and diastereocontrol, controllable decarboxylation and the formation of adjacent quaternary stereocentres. Org Biomol Chem 2016; 14:3040-6. [DOI: 10.1039/c6ob00089d] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
It has been shown for the first time that enolisable anhydrides can participate in highly efficient and diastereo/enantioselective additions to activated ketones.
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Affiliation(s)
- Claudio Cornaggia
- Trinity Biomedical Sciences Institute
- School of Chemistry
- The University of Dublin
- Trinity College
- Dublin 2, Ireland
| | - Sivaji Gundala
- Trinity Biomedical Sciences Institute
- School of Chemistry
- The University of Dublin
- Trinity College
- Dublin 2, Ireland
| | - Francesco Manoni
- Trinity Biomedical Sciences Institute
- School of Chemistry
- The University of Dublin
- Trinity College
- Dublin 2, Ireland
| | - Nagaraju Gopalasetty
- Trinity Biomedical Sciences Institute
- School of Chemistry
- The University of Dublin
- Trinity College
- Dublin 2, Ireland
| | - Stephen J. Connon
- Trinity Biomedical Sciences Institute
- School of Chemistry
- The University of Dublin
- Trinity College
- Dublin 2, Ireland
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27
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Cronin SA, Gutiérrez Collar A, Gundala S, Cornaggia C, Torrente E, Manoni F, Botte A, Twamley B, Connon SJ. The first catalytic asymmetric cycloadditions of imines with an enolisable anhydride. Org Biomol Chem 2016; 14:6955-9. [DOI: 10.1039/c6ob00048g] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first asymmetric cycloaddition reactions between imines and enolisable anhydrides is described.
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Affiliation(s)
- Sarah A. Cronin
- Trinity Biomedical Sciences Institute
- School of Chemistry
- The University of Dublin
- Trinity College
- Dublin 2
| | - Aarón Gutiérrez Collar
- Trinity Biomedical Sciences Institute
- School of Chemistry
- The University of Dublin
- Trinity College
- Dublin 2
| | - Sivaji Gundala
- Trinity Biomedical Sciences Institute
- School of Chemistry
- The University of Dublin
- Trinity College
- Dublin 2
| | - Claudio Cornaggia
- Trinity Biomedical Sciences Institute
- School of Chemistry
- The University of Dublin
- Trinity College
- Dublin 2
| | - Esther Torrente
- Trinity Biomedical Sciences Institute
- School of Chemistry
- The University of Dublin
- Trinity College
- Dublin 2
| | - Francesco Manoni
- Trinity Biomedical Sciences Institute
- School of Chemistry
- The University of Dublin
- Trinity College
- Dublin 2
| | - Astrid Botte
- Trinity Biomedical Sciences Institute
- School of Chemistry
- The University of Dublin
- Trinity College
- Dublin 2
| | - Brendan Twamley
- Trinity Biomedical Sciences Institute
- School of Chemistry
- The University of Dublin
- Trinity College
- Dublin 2
| | - Stephen J. Connon
- Trinity Biomedical Sciences Institute
- School of Chemistry
- The University of Dublin
- Trinity College
- Dublin 2
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28
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Dar’in D, Bakulina O, Chizhova M, Krasavin M. New Heterocyclic Product Space for the Castagnoli–Cushman Three-Component Reaction. Org Lett 2015. [DOI: 10.1021/acs.orglett.5b02014] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Dmitry Dar’in
- Institute
of Chemistry, Saint Petersburg State University, 26 Universitetskii Prospect, Peterhof 198504, Russian Federation
| | - Olga Bakulina
- Institute
of Chemistry, Saint Petersburg State University, 26 Universitetskii Prospect, Peterhof 198504, Russian Federation
| | - Maria Chizhova
- Institute
of Chemistry, Saint Petersburg State University, 26 Universitetskii Prospect, Peterhof 198504, Russian Federation
| | - Mikhail Krasavin
- Institute
of Chemistry, Saint Petersburg State University, 26 Universitetskii Prospect, Peterhof 198504, Russian Federation
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29
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Hong J, Wang Z, Levin A, Emge TJ, Floyd DM, Knapp S. Dimerization and comments on the reactivity of homophthalic anhydride. Tetrahedron Lett 2015; 56:3001-3004. [PMID: 26124537 DOI: 10.1016/j.tetlet.2014.10.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Homophthalic anhydride (HPA) dimerizes under the influence of base to provide, sequentially, the (3-4')-C-acyl dimer, a pair of chiral diastereomeric bis(lactones), 3-(2-carboxybenzyl)isocoumarin-4-carboxylic acid, and finally, 3-(2-carboxybenzyl)isocoumarin. The structures of the bis(lactones) were misassigned in 1970 based on the (presumed) cis thermal decarboxylative elimination reaction of the lower melting one. The preferred pathway should be trans-anti, however, and crystallographic analysis of one of the bis(lactones) reverses the earlier assignment. The formal cycloaddition reaction of HPA with imines occurs in preference to HPA dimerization; the mechanistic implications of this reactivity difference are discussed.
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Affiliation(s)
- Julia Hong
- Department of Chemistry and Chemical Biology, Rutgers - The State University of New Jersey, 610 Taylor Rd., Piscataway, NJ 08854, USA
| | - Zheng Wang
- Department of Chemistry and Chemical Biology, Rutgers - The State University of New Jersey, 610 Taylor Rd., Piscataway, NJ 08854, USA
| | - Aaron Levin
- Department of Chemistry and Chemical Biology, Rutgers - The State University of New Jersey, 610 Taylor Rd., Piscataway, NJ 08854, USA
| | - Thomas J Emge
- Department of Chemistry and Chemical Biology, Rutgers - The State University of New Jersey, 610 Taylor Rd., Piscataway, NJ 08854, USA
| | - David M Floyd
- Department of Chemistry and Chemical Biology, Rutgers - The State University of New Jersey, 610 Taylor Rd., Piscataway, NJ 08854, USA
| | - Spencer Knapp
- Department of Chemistry and Chemical Biology, Rutgers - The State University of New Jersey, 610 Taylor Rd., Piscataway, NJ 08854, USA
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30
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Sucu BO, Ocal N, Erden I. Direct synthesis of imidazolidin-4-ones via cycloadditions of imines with a Leuchs’ anyhdride. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.04.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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31
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Wang KM, Ma YL, Lin XR, Yan SJ, Lin J. Regioselective synthesis of pyrrolo[1,2-a]imidazoles and imidazo[1,2-a]-pyridines. RSC Adv 2015. [DOI: 10.1039/c5ra04244e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A concise synthesis of pyrrolo[1,2-a]imidazoles and imidazo[1,2-a]-pyridines by regioselective aza-ene additions and regioselective cyclic–condensation reactions of HKAs with ethyl 3-benzoylacrylate derivatives under catalyst-free conditions.
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Affiliation(s)
- Kai-Min Wang
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry Education
- Advanced Analysis and Measurement Center
- School of Chemical Science and Technology
- Yunnan University
| | - Yu-Lu Ma
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry Education
- Advanced Analysis and Measurement Center
- School of Chemical Science and Technology
- Yunnan University
| | - Xin-Rong Lin
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry Education
- Advanced Analysis and Measurement Center
- School of Chemical Science and Technology
- Yunnan University
| | - Sheng-Jiao Yan
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry Education
- Advanced Analysis and Measurement Center
- School of Chemical Science and Technology
- Yunnan University
| | - Jun Lin
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry Education
- Advanced Analysis and Measurement Center
- School of Chemical Science and Technology
- Yunnan University
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32
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Liu J, Wang Z, Levin A, Emge TJ, Rablen PR, Floyd DM, Knapp S. N-methylimidazole promotes the reaction of homophthalic anhydride with imines. J Org Chem 2014; 79:7593-9. [PMID: 25036978 PMCID: PMC4136697 DOI: 10.1021/jo501316m] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
The addition of N-methylimidazole (NMI) to the
reaction of homophthalic anhydride with imines such as pyridine-3-carboxaldehyde-N-trifluoroethylimine (9) reduces the amount
of elimination byproduct and improves the yield of the formal cycloadduct,
tetrahydroisoquinolonic carboxylate 10. Carboxanilides
of such compounds are of interest as potential antimalarial agents.
A mechanism that rationalizes the role of NMI is proposed, and a gram-scale
procedure for the synthesis and resolution of 10 is also
described.
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Affiliation(s)
- Jian Liu
- Department of Chemistry & Chemical Biology, Rutgers The State University of New Jersey , 610 Taylor Road, Piscataway, New Jersey 08854, United States
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33
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Sorto N, Di Maso MJ, Muñoz MA, Dougherty RJ, Fettinger JC, Shaw JT. Diastereoselective synthesis of γ- and δ-lactams from imines and sulfone-substituted anhydrides. J Org Chem 2014; 79:2601-10. [PMID: 24552208 PMCID: PMC3977582 DOI: 10.1021/jo500050n] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Indexed: 12/16/2022]
Abstract
Sulfone-substituted γ- and δ-lactams have been prepared in a single step with high diastereoselectivity. Sulfonylglutaric anhydrides produce intermediates that readily decarboxylate to provide δ-lactams with high diastereoselectivity. Substituents at the 3- or 4-position of the glutaric anhydride induce high levels of stereocontrol. Sulfonylsuccinic anhydrides produce intermediate carboxylic acids that can be trapped as methyl esters or allowed to decarboxylate under mild conditions. This method has been applied to a short synthesis of the pyrrolizidine alkaloid (±)-isoretronecanol.
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Affiliation(s)
- Nohemy
A. Sorto
- Department
of Chemistry, University of California,
Davis, One Shields Avenue, Davis, California 95616, United States
| | - Michael J. Di Maso
- Department
of Chemistry, University of California,
Davis, One Shields Avenue, Davis, California 95616, United States
| | - Manuel A. Muñoz
- Department
of Chemistry, University of California,
Davis, One Shields Avenue, Davis, California 95616, United States
| | - Ryan J. Dougherty
- Department
of Chemistry, University of California,
Davis, One Shields Avenue, Davis, California 95616, United States
| | - James C. Fettinger
- Department
of Chemistry, University of California,
Davis, One Shields Avenue, Davis, California 95616, United States
| | - Jared T. Shaw
- Department
of Chemistry, University of California,
Davis, One Shields Avenue, Davis, California 95616, United States
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34
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Pattawong O, Salih MQ, Rosson NT, Beaudry CM, Cheong PHY. The nature of persistent conformational chirality, racemization mechanisms, and predictions in diarylether heptanoid cyclophane natural products. Org Biomol Chem 2014; 12:3303-9. [DOI: 10.1039/c3ob42550a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Restricted rotations of chemical bonds can lead to the presence of persistent conformational chirality in molecules lacking stereocenters.
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Affiliation(s)
| | - M. Quamar Salih
- Department of Chemistry
- Oregon State University
- Corvallis, USA
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35
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Liu J, Zhang HR, Lin XR, Yan SJ, Lin J. Catalyst-free cascade reaction of heterocyclic ketene aminals with N-substituted maleimide to synthesise bicyclic pyrrolidinone derivatives. RSC Adv 2014. [DOI: 10.1039/c4ra03863k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
An efficient synthesis of bicyclic pyrrolidinones via a cascade reaction of HKAs and N-substituted maleimide in an environmentally friendly medium is described. This protocol uses group-assisted purification (GAP) chemistry. The library of bicyclic pyrrolidinone derivatives has been constructed with moderate to excellent yields.
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Affiliation(s)
- Jin Liu
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming, P. R. China
| | - Hai-Rui Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming, P. R. China
| | - Xin-Rong Lin
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming, P. R. China
| | - Sheng-Jiao Yan
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming, P. R. China
| | - Jun Lin
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming, P. R. China
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36
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Ye LW, Shu C, Gagosz F. Recent progress towards transition metal-catalyzed synthesis of γ-lactams. Org Biomol Chem 2014; 12:1833-45. [DOI: 10.1039/c3ob42181c] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The scope of transition metal-catalyzed synthesis of functionalized γ-lactams has broadened tremendously in the last decade (see the picture). These metal-catalyzed processes are reviewed by highlighting their specificity and applicability, and the mechanistic rationale is presented where possible.
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Affiliation(s)
- Long-Wu Ye
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005, P. R. China
| | - Chao Shu
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005, P. R. China
| | - Fabien Gagosz
- Laboratoire de Synthèse Organique (DCSO)
- UMR 7652 CNRS/Ecole Polytechnique
- Ecole Polytechnique
- 91128 Palaiseau cedex, France
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37
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Tan DQ, Younai A, Pattawong O, Fettinger JC, Cheong PHY, Shaw JT. Stereoselective synthesis of γ-lactams from imines and cyanosuccinic anhydrides. Org Lett 2013; 15:5126-9. [PMID: 24070117 PMCID: PMC3874237 DOI: 10.1021/ol402554n] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A reaction between imines and anhydrides has been developed with chiral disubstituted anhydrides and chiral imines. The synthesis of highly substituted γ-lactams with three stereogenic centers, including one quaternary center, proceeds at room temperature in high yield and with high diastereoselectivity in most cases. Enantiomerically pure alkyl-substituted anhydrides proceed with no epimerization, thus providing access to enantiomerically pure penta-substituted lactam products.
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Affiliation(s)
- Darlene Q. Tan
- Department of Chemistry, University of California, Davis, One Shields Ave, Davis, CA 95616, USA
| | - Ashkaan Younai
- Department of Chemistry, University of California, Davis, One Shields Ave, Davis, CA 95616, USA
| | - Ommidala Pattawong
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, OR, 97331, USA
| | - James C. Fettinger
- Department of Chemistry, University of California, Davis, One Shields Ave, Davis, CA 95616, USA
| | - Paul Ha-Yeon Cheong
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, OR, 97331, USA
| | - Jared T. Shaw
- Department of Chemistry, University of California, Davis, One Shields Ave, Davis, CA 95616, USA
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