1
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Chen Q, Zhang Y, Song Y, Zhang Y, Su Z, Feng X, Liu X. Asymmetric Synthesis of Hydroindoles via Desymmetrizing [3+2] Annulation of p-Quinamines and Arylalkylketenes. Org Lett 2024. [PMID: 38606985 DOI: 10.1021/acs.orglett.4c00780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
The asymmetric desymmetrizing [3+2] annulation reaction of p-quinamines and arylalkylketenes to synthesize hydroindoles was realized. Catalyzed by chiral bisguanidinium hemisalt via multiple hydrogen bond interactions, enantiomerically enriched products with reversal of diastereoselectivity in comparison with the racemic version were afforded in good yields under mild reaction conditions. Diaryl-substituted hydroindoles could also perform the Friedel-Crafts type of addition to give more complicated multicycles. Density functional theory calculations revealed that the enantio- and diastereoselectivity stem from varied hydrogen-bonding manners.
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Affiliation(s)
- Qianping Chen
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yan Zhang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yanji Song
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yang Zhang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Zhishan Su
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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2
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Ibrahim AA, O'Reilly SCJ, Bottarel M, Kerrigan NJ. Asymmetric synthesis of enantioenriched α-allyl esters through Pd(BINAPHANE)-catalysed allylation of disubstituted ketenes. Chem Commun (Camb) 2024; 60:3283-3286. [PMID: 38421221 DOI: 10.1039/d4cc00057a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Pd2dba3·CHCl3 (2.5 mol%)-BINAPHANE (5 mol%) was used to promote the first catalytic enantioselective allylation of disubstituted ketenes to give α-allyl esters. The ester products were formed in good to excellent yields (61-93% yield for 13 examples, 16 examples in all), with moderate to good enantioselectivity (68-80% ee for 7 examples).
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Affiliation(s)
- Ahmad A Ibrahim
- Department of Chemistry, Oakland University, 2200 N. Squirrel Rd, Rochester, MI 48309, USA
| | - Stephen C J O'Reilly
- School of Chemical Sciences and Life Sciences Institute, Dublin City University, Glasnevin, Dublin 9, Ireland.
| | - Margot Bottarel
- School of Chemical Sciences and Life Sciences Institute, Dublin City University, Glasnevin, Dublin 9, Ireland.
| | - Nessan J Kerrigan
- School of Chemical Sciences and Life Sciences Institute, Dublin City University, Glasnevin, Dublin 9, Ireland.
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3
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Mishra M, Verma K, Banerjee S, Punniyamurthy T. Iron-catalyzed cascade C-C/C-O bond formation of 2,4-dienals with donor-acceptor cyclopropanes: access to functionalized hexahydrocyclopentapyrans. Chem Commun (Camb) 2024; 60:2788-2791. [PMID: 38362602 DOI: 10.1039/d3cc06261a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
Iron-catalyzed cascade C-C and C-O bond formation of 2,4-dienals with donor-acceptor cyclopropanes (DACs) has been developed to furnish hexahydrocyclopentapyrans. Optically active DACs can be coupled stereospecifically (>97% ee). Chirality transfer, use of iron-catalysis and substrate scope are the salient practical features.
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Affiliation(s)
- Manmath Mishra
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India.
| | - Kshitiz Verma
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India.
| | - Sonbidya Banerjee
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India.
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4
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Borisov DD, Novikov RA, Tomilov YV. Three-Component Synthesis of Substituted Perhydropyrans from β-Styrylmalonates, Aldehydes, and Alkoxyaluminum Dichlorides. Org Lett 2024; 26:1022-1027. [PMID: 38284999 DOI: 10.1021/acs.orglett.3c04097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
A three-component synthesis of substituted dimethyl dihydro-2H-pyran-3,3(4H)-dicarboxylates in up to 80% yields by the reaction of β-styrylmalonates with aromatic or aliphatic aldehydes in the presence of ROAlCl2 prepared in advance either by exposure of EtAlCl2 with air access or by mixing equimolar amounts of AlCl3 with a primary or secondary alcohol has been developed. If EtAlCl2, itself, is used, dihydro-2H-pyran-3,3(4H)-diesters are not formed at all, while dimerization of styrylmalonates by (4 + 2)-annulation-type to give substituted tetrahydronaphthalenes is the main process. The possibility of using the CH-O-Al fragment of alkoxyaluminum dichlorides in cycloaddition reactions with α-CH-functionalization has been shown for the first time.
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Affiliation(s)
- Denis D Borisov
- Russian Academy of Sciences, N. D. Zelinsky Institute of Organic Chemistry, 47 Leninsky prosp., 119991 Moscow, Russian Federation
| | - Roman A Novikov
- Russian Academy of Sciences, N. D. Zelinsky Institute of Organic Chemistry, 47 Leninsky prosp., 119991 Moscow, Russian Federation
- Engelhardt Institute of Molecular Biology RAS, 32 Vavilov St., Moscow 119991, Russian Federation
| | - Yury V Tomilov
- Russian Academy of Sciences, N. D. Zelinsky Institute of Organic Chemistry, 47 Leninsky prosp., 119991 Moscow, Russian Federation
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5
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Dokai Y, Amemiya T, Yamada T, Saito K. Decarboxylative Intramolecular [3 + 2] Cycloaddition of Cyclic Enol Carbonates: Construction of a Bicyclo[3.3.0]octanone Skeleton. Org Lett 2023; 25:7562-7566. [PMID: 37800539 DOI: 10.1021/acs.orglett.3c02956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
Stereoselective synthesis of bicyclic cyclopentanones was achieved by sequential Tf2O-catalyzed decarboxylation and intramolecular [3 + 2] cycloaddition reactions of cyclic enol carbonates bearing an alkene unit. Four stereogenic centers in the obtained cyclopentanone were stereoselectively constructed. This method could be applied to the synthesis of various fused bicyclic products in moderate-to-good yields.
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Affiliation(s)
- Yoichi Dokai
- Department of Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Tsukasa Amemiya
- Department of Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Tohru Yamada
- Department of Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Kodai Saito
- Course of Science Education, Faculty of Education, Hokkaido University of Education, Asahikawa Campus, Hokumon-cho 9, Asahikawa 070-8621, Japan
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6
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Kopyt M, Tryniszewski M, Barbasiewicz M, Kwiatkowski P. Enantioselective Addition of Dialkyl Malonates to β-Arylethenesulfonyl Fluorides under High-Pressure Conditions. Org Lett 2023; 25:6818-6822. [PMID: 37655810 PMCID: PMC10521026 DOI: 10.1021/acs.orglett.3c02302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Indexed: 09/02/2023]
Abstract
Application of high-pressure conditions enables enantioselective Michael-type addition of dialkyl malonates to β-arylethenesulfonyl fluorides. The reaction is efficiently catalyzed with 5 mol % of tertiary amino-thiourea at 9 kbar. Chiral alkanesulfonyl fluorides are formed in yields of up to 96% and enantioselectivities of up to 92%. Functionalization of the adducts via sulfur fluoride exchange (SuFEx) reaction and desulfonylative cyclization is demonstrated.
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Affiliation(s)
- Michał Kopyt
- Faculty
of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
- Biological
and Chemical Research Centre, University
of Warsaw, Żwirki
i Wigury 101, 02-089 Warsaw, Poland
| | - Michał Tryniszewski
- Faculty
of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Michał Barbasiewicz
- Faculty
of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Piotr Kwiatkowski
- Faculty
of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
- Biological
and Chemical Research Centre, University
of Warsaw, Żwirki
i Wigury 101, 02-089 Warsaw, Poland
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7
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Radhoff N, Daniliuc CG, Studer A. Lewis Acid Catalyzed Formal (3+2)-Cycloaddition of Bicyclo[1.1.0]butanes with Ketenes. Angew Chem Int Ed Engl 2023; 62:e202304771. [PMID: 37166141 DOI: 10.1002/anie.202304771] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/04/2023] [Accepted: 05/11/2023] [Indexed: 05/12/2023]
Abstract
Design, synthesis and application of benzene bioisosteres have attracted a lot of attention in the past 20 years. Recently, bicyclo[2.1.1]hexanes have emerged as highly attractive bioisosteres for ortho- and meta-substituted benzenes. Herein we report a mild, scalable and transition-metal-free protocol for the construction of highly substituted bicyclo[2.1.1]hexan-2-ones through Lewis acid catalyzed (3+2)-cycloaddition of bicyclo[1.1.0]-butane ketones with disubstituted ketenes. The reaction shows high functional group tolerance as documented by the successful preparation of various 3-alkyl-3-aryl as well as 3,3-bisalkyl bicyclo[2.1.1]hexan-2-ones (26 examples, up to 89 % yield). Postfunctionalization of the exocyclic ketone moiety is also demonstrated.
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Affiliation(s)
- Niklas Radhoff
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstraße 40, 48149, Münster, Germany
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstraße 40, 48149, Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstraße 40, 48149, Münster, Germany
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8
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Dong S, Zhu J. Predicting Small Molecule Activation including Catalytic Hydrogenation of Dinitrogen Promoted by a Dual Lewis Acid. Chem Asian J 2023; 18:e202200991. [PMID: 36353939 DOI: 10.1002/asia.202200991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 10/20/2022] [Indexed: 11/12/2022]
Abstract
For decades, N2 activation and functionalization have required the use of transition metal complexes. Thus, it is one of the most challenging projects to activate the abundant dinitrogen through metal-free systems under mild conditions. Here, we demonstrate a proof-of-concept study on the catalytic hydrogenation of dinitrogen (with activation energy as low as 15.3 kcal mol-1 ) initiated by a dual Lewis acid (DLA) via density functional theory (DFT) calculations. In addition, such a DLA could be also used to activate a series of small molecules including carbon dioxide, formaldehyde, N-ethylenemethylamine, and acetonitrile. It is found that aromaticity plays an important role in stabilizing intermediates and products. Our findings provide an alternative approach to N2 activation and functionalization, highlighting a great potential of DLA for small molecule activation.
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Affiliation(s)
- Shicheng Dong
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Department of Chemistry College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Jun Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Department of Chemistry College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
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9
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[3+2] Cycloaddition of alkyl aldehydes and alkynes enabled by photoinduced hydrogen atom transfer. Nat Commun 2022; 13:4734. [PMID: 35961987 PMCID: PMC9374768 DOI: 10.1038/s41467-022-32467-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 07/29/2022] [Indexed: 11/25/2022] Open
Abstract
[3+2] Cycloaddition is a step- and atom-economic method for the synthesis of five-membered rings. Despite the great success of 1,3-dipolar cycloadditions, the radical [3+2] annulation of alkynes remains a formidable challenge. Herein, a photoinduced decatungstate-catalyzed [3+2] cycloaddition of various internal alkynes using abundant aliphatic aldehydes as a three-carbon synthon is developed, producing elaborate cyclopentanones in 100% atom economy with excellent site-, regio-, and diastereoselectivity under mild conditions. The catalytic cycle consists of hydrogen atom abstraction from aldehydes, radical addition, 1,5-hydrogen atom transfer, anti-Baldwin 5-endo-trig cyclization, and back hydrogen abstraction. The power of this method is showcased by the late-stage elaboration of medicinally relevant molecules and total or formal synthesis of (±)-β-cuparenone, (±)-laurokamurene B, and (±)-cuparene. In contrast to the prevalence of 1,3-dipolar cycloadditions, radical [3+2] annulations of alkynes are underexplored. Here, the authors describe [3+2] cycloadditions of various internal alkynes with readily accessible aliphatic aldehydes via photoinduced decatungstate catalysis.
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10
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Radhoff N, Studer A. 1,4-Aryl migration in ketene-derived enolates by a polar-radical-crossover cascade. Nat Commun 2022; 13:3083. [PMID: 35655065 PMCID: PMC9163183 DOI: 10.1038/s41467-022-30817-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 05/16/2022] [Indexed: 11/22/2022] Open
Abstract
The arylation of carboxylic acid derivatives via Smiles rearrangement has gained great interest in recent years. Both radical and ionic approaches, as well as radical-polar crossover concepts, have been developed. In contrast, a reversed polar-radical crossover approach remains underexplored. Here we report a simple, efficient and scalable method for the preparation of sterically hindered and valuable α-quaternary amides via a polar-radical crossover-enolate oxidation-aryl migration pathway. A variety of easily accessible N-alkyl and N-arylsulfonamides are reacted with disubstituted ketenes to give the corresponding amide enolates, which undergo upon single electron transfer oxidation, a 1,4-aryl migration, desulfonylation, hydrogen atom transfer cascade to provide α-quaternary amides in good to excellent yields. Various mono- and di-substituted heteroatom-containing and polycyclic arenes engage in the aryl migration reaction. Functional group tolerance is excellent and substrates as well as reagents are readily available rendering the method broadly applicable. The α-arylation of amides via aryl migration has attracted considerable interest in recent years. Here, the authors report a method for the preparation of bulky α-quaternary amides via a polar-radical crossover enolate oxidation-aryl migration cascade.
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Affiliation(s)
- Niklas Radhoff
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149, Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149, Münster, Germany.
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11
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Mondal M, Mitra S, Twardy DJ, Panda M, Wheeler KA, Kerrigan NJ. Asymmetric Synthesis of Bicyclic Pyrazolidinones through Alkaloid-Catalyzed [3+2]-Cycloadditions of Ketenes and Azomethine Imines. Chemistry 2022; 28:e202104391. [PMID: 35175649 PMCID: PMC9311188 DOI: 10.1002/chem.202104391] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Indexed: 11/29/2022]
Abstract
A versatile asymmetric synthesis of bicyclic pyrazolidinones through alkaloid‐catalyzed formal [3+2]‐ and [3+2+2]‐cycloadditions of ketenes with azomethine imines is described. The methodology was found to be tolerant of ketene and a variety of monosubstituted ketenes (R=alkyl, OAc). The products were formed in good to excellent yields (71–99 % for 24 examples, 39 examples in all), with good to excellent diastereoselectivity in many cases (dr 3 : 1 to 27 : 1 for 22 examples), and with excellent enantioselectivity for most examples (≥93 % ee for 34 products). In the case of most disubstituted ketenes, the reaction proceeded through a [3+2+2]‐cycloaddition to form structurally interesting bicyclic pyrazolo‐oxadiazepinediones with moderate diastereoselectivity (dr up to 3.7 : 1) and as racemic mixtures (3 examples). The method represents the first unambiguous example of an enantioselective reaction between ketenes and a 1,3‐dipole.
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Affiliation(s)
- Mukulesh Mondal
- Department of Chemistry, Oakland University, 2200 N. Squirrel Road, Rochester, MI 48309-4477, USA
| | - Shubhanjan Mitra
- School of Chemical Sciences, Dublin City University Glasnevin, Dublin 9, Ireland
| | - Dylan J Twardy
- Department of Chemistry, Oakland University, 2200 N. Squirrel Road, Rochester, MI 48309-4477, USA
| | - Manashi Panda
- Department of Chemistry, Oakland University, 2200 N. Squirrel Road, Rochester, MI 48309-4477, USA
| | - Kraig A Wheeler
- Department of Chemistry, Whitworth University, Spokane, WA 99251, USA
| | - Nessan J Kerrigan
- School of Chemical Sciences, Dublin City University Glasnevin, Dublin 9, Ireland
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12
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Mlostoń G, Kowalczyk M, Augustin AU, Jones PG, Werz DB. Lewis‐Acid‐Catalyzed (3+2)‐Cycloadditions of Donor‐Acceptor Cyclopropanes with Thioketenes. European J Org Chem 2021; 2021:6250-6253. [PMID: 35875264 PMCID: PMC9290834 DOI: 10.1002/ejoc.202100879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 07/28/2021] [Indexed: 11/06/2022]
Affiliation(s)
- Grzegorz Mlostoń
- University of Łodź Department of Organic & Applied Chemistry Tamka 12 91-403 Łodź Poland
| | - Mateusz Kowalczyk
- University of Łodź Department of Organic & Applied Chemistry Tamka 12 91-403 Łodź Poland
| | - André U. Augustin
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Peter G. Jones
- Technische Universität Braunschweig Institute of Inorganic and Analytical Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Daniel B. Werz
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
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13
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Pirenne V, Robert EGL, Waser J. Catalytic (3 + 2) annulation of donor-acceptor aminocyclopropane monoesters and indoles. Chem Sci 2021; 12:8706-8712. [PMID: 34257869 PMCID: PMC8246098 DOI: 10.1039/d1sc01127h] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 05/04/2021] [Indexed: 12/16/2022] Open
Abstract
The efficient catalytic activation of donor-acceptor aminocyclopropanes lacking the commonly used diester acceptor is reported here in a (3 + 2) dearomative annulation with indoles. Bench-stable tosyl-protected aminocyclopropyl esters were converted into cycloadducts in 46-95% yields and up to 95 : 5 diastereomeric ratio using catalytic amounts of triethylsilyl triflimide. Tricyclic indoline frameworks containing four stereogenic centers including all-carbon quaternary centers were obtained.
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Affiliation(s)
- Vincent Pirenne
- Laboratory of Catalysis and Organic Synthesis, Institut des Sciences et Ingénierie Chimique, Ecole Polytechnique Fédérale de Lausanne Ch-1015 Lausanne Switzerland
| | - Emma G L Robert
- Laboratory of Catalysis and Organic Synthesis, Institut des Sciences et Ingénierie Chimique, Ecole Polytechnique Fédérale de Lausanne Ch-1015 Lausanne Switzerland
| | - Jerome Waser
- Laboratory of Catalysis and Organic Synthesis, Institut des Sciences et Ingénierie Chimique, Ecole Polytechnique Fédérale de Lausanne Ch-1015 Lausanne Switzerland
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14
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Ghosh K, Das S. Recent advances in ring-opening of donor acceptor cyclopropanes using C-nucleophiles. Org Biomol Chem 2021; 19:965-982. [PMID: 33471020 DOI: 10.1039/d0ob02437f] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Ring-opening transformations of donor-acceptor cyclopropanes (DAC) with carbon-centered nucleophiles is a simple, straight-forward approach to 1,3-bifunctional compounds that has witnessed remarkable progress over the past several years. To date, different reactivity patterns of DACs have been successfully exploited in racemic/stereoselective syntheses of various acyclic compounds or carbocycles with an impressive structural diversity. The thriving strategies have been successfully utilized in multistep synthesis of complex target molecules. Herein, the recent advances (2015-present) in the ring-opening of DAC involving electron rich arenes and indoles, active methylene compounds, various dipolarophiles, organoborates/boronates, vinyl ethers etc. following Friedel-Crafts alkylation, annulation/formal cycloaddition reaction, organocatalytic reaction, Nazarov cyclisation etc. are presented.
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Affiliation(s)
- Koena Ghosh
- Department of Chemistry, Presidency University, 86/1 College Street, Kolkata 700 073, India.
| | - Subhomoy Das
- Department of Chemistry, Bar Ilan University, Ramat Gan 5290002, Israel
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15
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Viceriat A, Marchand I, Carret S, Poisson JF. Synthesis of γ-Lactams by Formal Cycloadditions with Ketenes. Org Lett 2021; 23:2449-2454. [PMID: 33705148 DOI: 10.1021/acs.orglett.1c00335] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of γ-lactams is reported by a formal (3+2) cycloaddition between readily available ketenes and aziridines or a one-pot formal (2+1+2) cycloaddition using imines as aziridine precursors. The method is practical, is scalable, and affords high yields. It also offers a high level of regio- and diastereoselectivity on a wide range of substrates as well as a high stereoselectivity in the case of enantiopure aziridines.
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Affiliation(s)
- Audrey Viceriat
- Univ. Grenoble Alpes, CNRS, DCM, 301 rue de la chimie, 38000 Grenoble, France
| | - Isabelle Marchand
- Univ. Grenoble Alpes, CNRS, DCM, 301 rue de la chimie, 38000 Grenoble, France
| | - Sébastien Carret
- Univ. Grenoble Alpes, CNRS, DCM, 301 rue de la chimie, 38000 Grenoble, France
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16
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Tang N, Xu Y, Niu T, Yang S, Dong H, Wu X, Zhu C. A radical [3 + 2]-cycloaddition reaction for the synthesis of difluorocyclopentanones. Org Chem Front 2021. [DOI: 10.1039/d1qo00201e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Described herein is a novel radical-mediated [3 + 2]-cycloaddition reaction of alkenes to afford difluorocyclopentanones.
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Affiliation(s)
- Nana Tang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
| | - Yan Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
| | - Tao Niu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
| | - Shan Yang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
| | - Hongchun Dong
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
| | - Xinxin Wu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
| | - Chen Zhu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
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17
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Peraino NJ, Mondal M, Ho H, Beuque A, Viola E, Gary M, Wheeler KA, Kerrigan NJ. Diastereoselective Synthesis of γ‐Lactones through Reaction of Sulfoxonium Ylides, Aldehydes, and Ketenes: Substrate Scope and Mechanistic Studies. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Nicholas J. Peraino
- Department of Chemistry Oakland University 2200 N. Squirrel Rd Rochester MI 48309 USA
| | - Mukulesh Mondal
- Department of Chemistry Oakland University 2200 N. Squirrel Rd Rochester MI 48309 USA
| | - Han‐Jen Ho
- Department of Chemistry Oakland University 2200 N. Squirrel Rd Rochester MI 48309 USA
| | - Antoine Beuque
- School of Chemical Sciences Dublin City University Glasnevin Dublin 9 Ireland
| | - Evan Viola
- School of Chemical Sciences Dublin City University Glasnevin Dublin 9 Ireland
| | - Melanie Gary
- Department of Chemistry Oakland University 2200 N. Squirrel Rd Rochester MI 48309 USA
| | | | - Nessan J. Kerrigan
- School of Chemical Sciences Dublin City University Glasnevin Dublin 9 Ireland
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18
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Liu J, Li Y, Ke M, Liu M, Zhan P, Xiao YC, Chen F. Unified Strategy to Amphenicol Antibiotics: Asymmetric Synthesis of (−)-Chloramphenicol, (−)-Azidamphenicol, and (+)-Thiamphenicol and Its (+)-3-Floride. J Org Chem 2020; 85:15360-15367. [PMID: 33169603 DOI: 10.1021/acs.joc.0c02181] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Jinxin Liu
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Yaling Li
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Miaolin Ke
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Minjie Liu
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Pingping Zhan
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, Shanghai 200433, China
| | - You-Cai Xiao
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Fener Chen
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, Shanghai 200433, China
- Shanghai Engineering Center of Industrial Asymmetric Catalysis for Chiral Drugs, Shanghai 200433, China
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19
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Panda M, Mondal M, Chen S, Ibrahim AA, Twardy DJ, Kerrigan NJ. Mechanistic Investigations of the Pd‐Catalyzed Hydrogenolysis of Ketene Heterodimer β‐Lactones. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000976] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Manashi Panda
- Department of Chemistry Oakland University 2200 N. Squirrel Rd Rochester 48309 MI USA
| | - Mukulesh Mondal
- Department of Chemistry Oakland University 2200 N. Squirrel Rd Rochester 48309 MI USA
| | - Shi Chen
- Department of Chemistry Oakland University 2200 N. Squirrel Rd Rochester 48309 MI USA
| | - Ahmad A. Ibrahim
- Department of Chemistry Oakland University 2200 N. Squirrel Rd Rochester 48309 MI USA
| | - Dylan J. Twardy
- Department of Chemistry Oakland University 2200 N. Squirrel Rd Rochester 48309 MI USA
| | - Nessan J. Kerrigan
- School of Chemical Sciences Dublin City University Glasnevin 9 Dublin Ireland
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20
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Ahlburg NL, Jones PG, Werz DB. cis-Selective, Enantiospecific Addition of Donor-Acceptor Cyclopropanes to Activated Alkenes: An Iodination/Michael-Cyclization Cascade. Org Lett 2020; 22:6404-6408. [PMID: 32806195 DOI: 10.1021/acs.orglett.0c02210] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
We present a versatile method for the enantiospecific, cis-diastereoselective intermolecular and intramolecular cycloaddition of donor-acceptor cyclopropanes to electron-poor alkenes with cyclic acceptor groups to afford highly substituted spirocyclopentanes in good to excellent yields. The reaction can be applied to biologically interesting scaffolds, including barbiturates and isoxazolones. Mechanistic investigations were undertaken to explain the unusual diastereoselectivity and enantiospecificity; these suggest an iodination/Michael-cyclization cascade.
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21
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Lücht A, Kreft A, Jones PG, Werz DB. Ketenedithioacetals as Surrogates for the Formal Insertion of Ketenes into Donor–Acceptor Cyclopropanes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000233] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Alexander Lücht
- Institute of Organic Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Alexander Kreft
- Institute of Organic Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Peter G. Jones
- Institute of Inorganic and Analytical Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Daniel B. Werz
- Institute of Organic Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
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