1
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Manavi B, Tejeneki HZ, Rominger F, Armaghan M, Frank W, Bijanzadeh HR, Balalaie S. Copper(I)‐Catalyzed Intramolecular Cyclization of
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‐Propargyloxy Diketopiperazines to Access Diverse Diazabicyclic and Spiro‐Diketopiperazinochromanes. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Bita Manavi
- Peptide Chemistry Research Institute K. N. Toosi University of Technology P. O. Box 15875-4416 Tehran Iran
| | - Hossein Zahedian Tejeneki
- Peptide Chemistry Research Institute K. N. Toosi University of Technology P. O. Box 15875-4416 Tehran Iran
| | - Frank Rominger
- Organisch-Chemisches Institut der Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Mahsa Armaghan
- Institut für Anorganische Chemie und Strukturchemie Heinrich-Heine-Universität Düsseldorf Universitätsstraße 1 40225 Düsseldorf Germany
| | - Walter Frank
- Institut für Anorganische Chemie und Strukturchemie Heinrich-Heine-Universität Düsseldorf Universitätsstraße 1 40225 Düsseldorf Germany
| | - Hamid Reza Bijanzadeh
- Department of Environmental Sciences, Faculty of Natural Resources and Marine Sciences Tarbiat Modares University Tehran Iran
| | - Saeed Balalaie
- Peptide Chemistry Research Institute K. N. Toosi University of Technology P. O. Box 15875-4416 Tehran Iran
- Medical Biology Research Center Kermanshah University of Medical Sciences Kermanshah Iran
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2
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Neal MJ, Hejnosz SL, Rohde JJ, Evanseck JD, Montgomery TD. Multi-Ion Bridged Pathway of N-Oxides to 1,3-Dipole Dilithium Oxide Complexes. J Org Chem 2021; 86:11502-11518. [PMID: 34379424 DOI: 10.1021/acs.joc.1c01047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Roussi's landmark work on the generation of 1,3-dipoles from tertiary amine N-oxides has not reached its full potential since its underlying mechanism is neither well explored nor understood. Two competing mechanisms were previously proposed to explain the transformation involving either an iminium ion or a diradical intermediate. Our investigation has revealed an alternative mechanistic pathway that explains experimental results and provides significant insights to guide the creation of new N-oxide reagents beyond tertiary alkylamines for direct synthetic transformations. Truhlar's M06-2x functional and Møller-Plesset second-order perturbation theory with Dunning's [jul,aug]-cc-pv[D,T]z basis sets and discrete-continuum solvation models were employed to determine activation enthalpies and structures. During these mechanistic explorations, we discovered a unique multi-ion bridged pathway resulting from the rate-determining step, which was energetically more favorable than other alternate mechanisms. This newly proposed mechanism contains no electrophilic intermediates, strengthening the reaction potential by broadening the reagent scope and limiting the possible side reactions. This thoroughly defined general mechanism supports a more direct route for improving the use of N-oxides in generating azomethine ylide-dilithium oxide complexes with expanded functional group tolerance and breadth of chemistry.
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Affiliation(s)
- Martin J Neal
- Department of Chemistry and Biochemistry, Center for Computational Sciences, Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, United States
| | - Sarah L Hejnosz
- Department of Chemistry and Biochemistry, Center for Computational Sciences, Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, United States
| | - Jeffrey J Rohde
- Department of Chemistry, Physics, and Engineering, Franciscan University of Steubenville, 1235 University Boulevard, Steubenville, Ohio 43952, United States
| | - Jeffrey D Evanseck
- Department of Chemistry and Biochemistry, Center for Computational Sciences, Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, United States
| | - Thomas D Montgomery
- Department of Chemistry and Biochemistry, Center for Computational Sciences, Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, United States
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3
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Dongbang S, Confair DN, Ellman JA. Rhodium-Catalyzed C-H Alkenylation/Electrocyclization Cascade Provides Dihydropyridines That Serve as Versatile Intermediates to Diverse Nitrogen Heterocycles. Acc Chem Res 2021; 54:1766-1778. [PMID: 33740369 PMCID: PMC8026680 DOI: 10.1021/acs.accounts.1c00027] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Nitrogen heterocycles are present in approximately 60% of drugs, with nonplanar heterocycles incorporating stereogenic centers being of considerable interest to the fields of medicinal chemistry, chemical biology, and synthetic methods development. Over the past several years, our laboratory has developed synthetic strategies to access highly functionalized nitrogen heterocycles with multiple stereogenic centers. This approach centers on the efficient preparation of diverse 1,2-dihydropyridines by a Rh-catalyzed C-H bond alkenylation/electrocyclization cascade from readily available α,β-unsaturated imines and alkynes. The often densely substituted 1,2-dihydropyridine products have proven to be extremely versatile intermediates that can be elaborated with high regioselectivity and stereoselectivity, often without purification or even isolation. Protonation or alkylation followed by addition of hydride or carbon nucleophiles affords tetrahydropyridines with divergent regioselectivity and stereoselectivity depending on the reaction conditions. Mechanistic experiments in combination with density functional theory (DFT) calculations provide a rationale for the high level of regiocontrol and stereocontrol that is observed. Further elaboration of the tetrahydropyridines by diastereoselective epoxidation and regioselective ring opening furnishes hydroxy-substituted piperidines. Alternatively, piperidines can be obtained directly from dihydropyridines by catalytic hydrogenation in good yields with high face selectivity.When trimethylsilyl alkynes or N-trimethylsilylmethyl imines are employed as starting inputs, the Rh-catalyzed C-H bond alkenylation/electrocyclization cascade provides silyl-substituted dihydropyridines that enable a host of new and useful transformations to different heterocycle classes. Protonation of these products under acidic conditions triggers the loss of the silyl group and the formation of unstabilized azomethine ylides that would be difficult to access by other means. Depending on the location of the silyl group, [3 + 2] cycloaddition of the azomethine ylides with dipolarophiles provides tropane or indolizidine privileged frameworks, which for intramolecular cycloadditions yield complex polycyclic products with up to five contiguous stereogenic centers. When different types of conditions are employed, loss of the silyl group can result in either rearrangement to cyclopropyl-fused pyrrolidines or to aminocyclopentadienes. Mechanistic experiments supported by DFT calculations provide reaction pathways for these unusual rearrangements.The transformations described in this Account are amenable to natural product synthesis and drug discovery applications because of the biological relevance of the structural motifs that are prepared, short reaction sequences that rely on readily available starting inputs, high regiocontrol and stereocontrol, and excellent functional group compatibility. For example, the methods have been applied to efficient asymmetric syntheses of morphinan drugs, including the opioid antagonist (-)-naltrexone, which is extensively used for the treatment of drug abuse.
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Affiliation(s)
- Sun Dongbang
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Danielle N Confair
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Jonathan A Ellman
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
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4
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Phelan ZK, Weiss PS, He Y, Guan Z, Thamattoor DM, Griffith DR. Synthetic Entry to the 2-Azatricyclo[4.3.2.0 4,9]undecane Ring System via Tropone. J Org Chem 2020; 85:2202-2212. [PMID: 31904976 DOI: 10.1021/acs.joc.9b02921] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A synthesis of the 2-azatricyclo[4.3.2.04,9]undecane ring system-a hitherto unreported bridged azatricyclic ring system-beginning from tricarbonyl(tropone)iron and allylamine was accomplished in three steps: (1) aza-Michael addition of allylamine to tricarbonyl(tropone)iron; (2) Boc-protection of the resulting secondary amine; and (3) oxidative demetallation leading to a spontaneous intramolecular Diels-Alder reaction. The effect of a variety of parameters on the intramolecular Diels-Alder reaction was investigated, including diene and dienophile substitution patterns and dienophile tether length.
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Affiliation(s)
- Zaki K Phelan
- Department of Chemistry , Lafayette College , Easton , Pennsylvania 18042 , United States
| | - Philip S Weiss
- Department of Chemistry , Lafayette College , Easton , Pennsylvania 18042 , United States
| | - Yiqun He
- Department of Chemistry , Lafayette College , Easton , Pennsylvania 18042 , United States
| | - Ziyang Guan
- Department of Chemistry , Lafayette College , Easton , Pennsylvania 18042 , United States
| | - Dasan M Thamattoor
- Department of Chemistry , Colby College , Waterville , Maine 04901 , United States
| | - Daniel R Griffith
- Department of Chemistry , Lafayette College , Easton , Pennsylvania 18042 , United States
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5
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Pyridoxal-5'-phosphate-dependent bifunctional enzyme catalyzed biosynthesis of indolizidine alkaloids in fungi. Proc Natl Acad Sci U S A 2019; 117:1174-1180. [PMID: 31882449 DOI: 10.1073/pnas.1914777117] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Indolizidine alkaloids such as anticancer drugs vinblastine and vincristine are exceptionally attractive due to their widespread occurrence, prominent bioactivity, complex structure, and sophisticated involvement in the chemical defense for the producing organisms. However, the versatility of the indolizidine alkaloid biosynthesis remains incompletely addressed since the knowledge about such biosynthetic machineries is only limited to several representatives. Herein, we describe the biosynthetic gene cluster (BGC) for the biosynthesis of curvulamine, a skeletally unprecedented antibacterial indolizidine alkaloid from Curvularia sp. IFB-Z10. The molecular architecture of curvulamine results from the functional collaboration of a highly reducing polyketide synthase (CuaA), a pyridoxal-5'-phosphate (PLP)-dependent aminotransferase (CuaB), an NADPH-dependent dehydrogenase (CuaC), and a FAD-dependent monooxygenase (CuaD), with its transportation and abundance regulated by a major facilitator superfamily permease (CuaE) and a Zn(II)Cys6 transcription factor (CuaF), respectively. In contrast to expectations, CuaB is bifunctional and capable of catalyzing the Claisen condensation to form a new C-C bond and the α-hydroxylation of the alanine moiety in exposure to dioxygen. Inspired and guided by the distinct function of CuaB, our genome mining effort discovers bipolamines A-I (bipolamine G is more antibacterial than curvulamine), which represent a collection of previously undescribed polyketide alkaloids from a silent BGC in Bipolaris maydis ATCC48331. The work provides insight into nature's arsenal for the indolizidine-coined skeletal formation and adds evidence in support of the functional versatility of PLP-dependent enzymes in fungi.
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6
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Wu SL, Li N, Yin GW, Xu Z, Ye F, Li L, Cui YM, Xu LW. Catalytic asymmetric cycloaddition of unsymmetrical EWG-activated alkenes to fully substituted pyrrolidines bearing three different carbonyl groups. Chem Commun (Camb) 2019; 55:14363-14366. [PMID: 31720613 DOI: 10.1039/c9cc07738c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A unique 1,3-dipolar [3+2] cycloaddition of alkyl 4-oxo-4-arylbut-2-enoates bearing two different electron-withdrawing groups was completed by using the silver/(R)-DTBM-Segphos catalyst system, which gives the corresponding fully substituted pyrrolidines with four stereogenic centers in good yields and with excellent enantioselectivities (up to 98% ee).
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Affiliation(s)
- Shi-Lu Wu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Key Laboratory of Organosilicon Material Technology of Zhejiang Province, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, P. R. China.
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7
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Gulevskaya AV, Nelina-Nemtseva JI. 1,3-Dipolar cycloaddition reactions of azomethine ylides and alkynes. Chem Heterocycl Compd (N Y) 2019. [DOI: 10.1007/s10593-019-02398-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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8
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Chen S, Chan AY, Walker MM, Ellman JA, Houk KN. π-Facial Selectivities in Hydride Reductions of Hindered Endocyclic Iminium Ions. J Org Chem 2019; 84:273-281. [PMID: 30516383 DOI: 10.1021/acs.joc.8b02603] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The origins of π-facial selectivities in the borohydride reduction of endocyclic iminium ions have been elucidated by density functional theory calculations. In reductions of conjugated ("thermodynamic") iminium ions, the π-facial preference of the hydride attack was found to be due to torsional steering. Attack at the favored π-face leads to a lower-energy "half-chair"-like conformation of the tetrahydropyridine product, whereas attack at the other π-face results in an unfavorable "twist-boat" conformation. In reductions of nonconjugated ("kinetic") iminium ions, torsional distinction is small between the top- and bottom-face attacks, and the π-facial selectivity of the hydride approach is primarily due to steric hindrance.
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Affiliation(s)
- Shuming Chen
- Department of Chemistry and Biochemistry , University of California , Los Angeles , California 90095-1569 , United States
| | - Amy Y Chan
- Department of Chemistry , Yale University , New Haven , Connecticut 06520 , United States
| | - Morgan M Walker
- Department of Chemistry , Yale University , New Haven , Connecticut 06520 , United States
| | - Jonathan A Ellman
- Department of Chemistry , Yale University , New Haven , Connecticut 06520 , United States
| | - K N Houk
- Department of Chemistry and Biochemistry , University of California , Los Angeles , California 90095-1569 , United States
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9
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Jangra H, Chen Q, Fuks E, Zenz I, Mayer P, Ofial AR, Zipse H, Mayr H. Nucleophilicity and Electrophilicity Parameters for Predicting Absolute Rate Constants of Highly Asynchronous 1,3-Dipolar Cycloadditions of Aryldiazomethanes. J Am Chem Soc 2018; 140:16758-16772. [DOI: 10.1021/jacs.8b09995] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Harish Jangra
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 München, Germany
| | - Quan Chen
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 München, Germany
| | - Elina Fuks
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 München, Germany
| | - Ivo Zenz
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 München, Germany
| | - Peter Mayer
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 München, Germany
| | - Armin R. Ofial
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 München, Germany
| | - Hendrik Zipse
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 München, Germany
| | - Herbert Mayr
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 München, Germany
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10
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Walker MM, Chen S, Mercado BQ, Houk KN, Ellman JA. Formation of Aminocyclopentadienes from Silyldihydropyridines: Ring Contractions Driven by Anion Stabilization. Angew Chem Int Ed Engl 2018; 57:6605-6609. [PMID: 29570926 DOI: 10.1002/anie.201800596] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 03/20/2018] [Indexed: 11/09/2022]
Abstract
Highly functionalized aminocyclopentadienes can be formed through the rearrangement of anions generated from readily prepared 6-silyl-1,2-dihydropyridines by desilylation with fluoride. The scope and generality of the reaction was defined, and diverse transformations were performed on the highly functionalized products. A mechanism and driving force for the rearrangement were identified from experiments and DFT calculations.
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Affiliation(s)
- Morgan M Walker
- Department of Chemistry, Yale University, 225 Prospect St., New Haven, CT, 06520, USA
| | - Shuming Chen
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095-1569, USA
| | - Brandon Q Mercado
- Department of Chemistry, Yale University, 225 Prospect St., New Haven, CT, 06520, USA
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095-1569, USA
| | - Jonathan A Ellman
- Department of Chemistry, Yale University, 225 Prospect St., New Haven, CT, 06520, USA
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11
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Walker MM, Chen S, Mercado BQ, Houk KN, Ellman JA. Formation of Aminocyclopentadienes from Silyldihydropyridines: Ring Contractions Driven by Anion Stabilization. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Morgan M. Walker
- Department of Chemistry Yale University 225 Prospect St. New Haven CT 06520 USA
| | - Shuming Chen
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095-1569 USA
| | - Brandon Q. Mercado
- Department of Chemistry Yale University 225 Prospect St. New Haven CT 06520 USA
| | - K. N. Houk
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095-1569 USA
| | - Jonathan A. Ellman
- Department of Chemistry Yale University 225 Prospect St. New Haven CT 06520 USA
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12
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Yuan Y, Zheng ZJ, Li L, Bai XF, Xu Z, Cui YM, Cao J, Yang KF, Xu LW. Silicon-based Bulky Group−Tuned Parallel Kinetic Resolution in Copper-Catalyzed 1,3-Dipolar Additions. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800220] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yang Yuan
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Zhan-Jiang Zheng
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Li Li
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Xing-Feng Bai
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
- Suzhou Research Insititue and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; Lanzhou People's Republic of China
| | - Zheng Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Yu-Ming Cui
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Jian Cao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Ke-Fang Yang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Li-Wen Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
- Suzhou Research Insititue and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; Lanzhou People's Republic of China
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13
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Yu B, Yang KF, Bai XF, Cao J, Zheng ZJ, Cui YM, Xu Z, Li L, Xu LW. Ligand-Controlled Inversion of Diastereo- and Enantioselectivity in Silver-Catalyzed Azomethine Ylide–Imine Cycloaddition of Glycine Aldimino Esters with Imines. Org Lett 2018; 20:2551-2554. [DOI: 10.1021/acs.orglett.8b00702] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Bo Yu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 311121, P. R. China
| | - Ke-Fang Yang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 311121, P. R. China
| | - Xing-Feng Bai
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 311121, P. R. China
- Suzhou Research Institute and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, P. R. China
| | - Jian Cao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 311121, P. R. China
| | - Zhan-Jiang Zheng
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 311121, P. R. China
| | - Yu-Ming Cui
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 311121, P. R. China
| | - Zheng Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 311121, P. R. China
| | - Li Li
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 311121, P. R. China
| | - Li-Wen Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 311121, P. R. China
- Suzhou Research Institute and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, P. R. China
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14
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Jo H, Hassan AHE, Jung SY, Lee JK, Cho YS, Min SJ. Construction of 8-Azabicyclo[3.2.1]octanes via Sequential DDQ-Mediated Oxidative Mannich Reactions of N-Aryl Pyrrolidines. Org Lett 2018; 20:1175-1178. [DOI: 10.1021/acs.orglett.8b00098] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hanbyeol Jo
- Department of Chemical & Molecular Engineering/Applied Chemistry, Hanyang University, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Ahmed H. E. Hassan
- Department
of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Seung Young Jung
- Center
for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
- Department
of Chemistry, Korea University, Seoul 02841, Republic of Korea
| | - Jae Kyun Lee
- Center
for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Yong Seo Cho
- Center
for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Sun-Joon Min
- Department of Chemical & Molecular Engineering/Applied Chemistry, Hanyang University, Ansan, Gyeonggi-do 15588, Republic of Korea
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15
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Yuan Y, Zheng ZJ, Ye F, Ma JH, Xu Z, Bai XF, Li L, Xu LW. Highly efficient desymmetrization of cyclopropenes to azabicyclo[3.1.0]hexanes with five continuous stereogenic centers by copper-catalyzed [3 + 2] cycloadditions. Org Chem Front 2018. [DOI: 10.1039/c8qo00761f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
An unprecedented copper-catalyzed desymmetrization/cycloaddition reaction of 1,1-disubstituted cyclopropenes provides an efficient access to azabicyclo[3.1.0]hexanes bearing five continuous carbon-stereogenic centers.
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Affiliation(s)
- Yang Yuan
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- P. R. China
| | - Zhan-Jiang Zheng
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- P. R. China
| | - Fei Ye
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- P. R. China
| | - Jun-Han Ma
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- P. R. China
| | - Zheng Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- P. R. China
| | - Xing-Feng Bai
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- P. R. China
| | - Li Li
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- P. R. China
| | - Li-Wen Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- P. R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- Suzhou Research Institute and Lanzhou Institute of Chemical Physics
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16
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Men Y, Dong J, Wang S, Xu X. Bicyclization of Azomethine Ylide: Access to Highly Functionalized 3H-Pyrrolo[2,3-c]quinolines. Org Lett 2017; 19:6712-6715. [DOI: 10.1021/acs.orglett.7b03434] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yang Men
- Department
of Chemistry, Jilin Province Key Laboratory of Organic Functional
Molecular Design and Synthesis, Northeast Normal University, Changchun 130024, China
| | - Jinhuan Dong
- College
of Chemistry, Chemical Engineering and Materials Science, Collaborative
Innovation Center of Functionalized Probes for Chemical Imaging in
Universities of Shandong, Key Laboratory of Molecular and Nano Probes,
Ministry of Education, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, China
| | - Shan Wang
- Department
of Chemistry, Jilin Province Key Laboratory of Organic Functional
Molecular Design and Synthesis, Northeast Normal University, Changchun 130024, China
| | - Xianxiu Xu
- Department
of Chemistry, Jilin Province Key Laboratory of Organic Functional
Molecular Design and Synthesis, Northeast Normal University, Changchun 130024, China
- College
of Chemistry, Chemical Engineering and Materials Science, Collaborative
Innovation Center of Functionalized Probes for Chemical Imaging in
Universities of Shandong, Key Laboratory of Molecular and Nano Probes,
Ministry of Education, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, China
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17
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Buev EM, Moshkin VS, Sosnovskikh VY. Nonstabilized Azomethine Ylides in the Mannich Reaction: Synthesis of 3,3-Disubstituted Pyrrolidines, Including Oxindole Alkaloids. J Org Chem 2017; 82:12827-12833. [DOI: 10.1021/acs.joc.7b02193] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Evgeny M. Buev
- Institute of Natural Sciences
and Mathematics, Ural Federal University, 620000 Ekaterinburg, Russian Federation
| | - Vladimir S. Moshkin
- Institute of Natural Sciences
and Mathematics, Ural Federal University, 620000 Ekaterinburg, Russian Federation
| | - Vyacheslav Y. Sosnovskikh
- Institute of Natural Sciences
and Mathematics, Ural Federal University, 620000 Ekaterinburg, Russian Federation
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18
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Hu Z, Dong J, Xu X. Silver-Catalyzed [3+2] Cycloaddition of Azomethine Ylides with Isocyanides for Imidazole Synthesis. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700447] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Zhongyan Hu
- Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis, Department of Chemistry; Northeast Normal University; Changchun 130024 People's Republic of China
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science; Shandong Normal University; Jinan 250014 People's Republic of China
| | - Jinhuan Dong
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science; Shandong Normal University; Jinan 250014 People's Republic of China
| | - Xianxiu Xu
- Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis, Department of Chemistry; Northeast Normal University; Changchun 130024 People's Republic of China
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science; Shandong Normal University; Jinan 250014 People's Republic of China
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19
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Yu B, Bai XF, Lv JY, Yuan Y, Cao J, Zheng ZJ, Xu Z, Cui YM, Yang KF, Xu LW. Enantioselective Synthesis of Chiral Imidazolidine Derivatives by Asymmetric Silver/Xing-Phos-Catalyzed Homo-1,3-Dipolar [3+2] Cycloaddition of Azomethine Ylides. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700732] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Bo Yu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Xing-Feng Bai
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
- Suzhou Research Insititue and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; Lanzhou People's Republic of China
| | - Ji-Yuan Lv
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Yang Yuan
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Jian Cao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Zhan-Jiang Zheng
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Zheng Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Yu-Ming Cui
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Ke-Fang Yang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Li-Wen Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
- Suzhou Research Insititue and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; Lanzhou People's Republic of China
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20
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Zhou DJ, Li XY, Li D, Guo ZS, Zhang QL, Bie HY, Cui ZG. Synthesis of dehydroindolizidine-type poison-frog alkaloids via Michael-type conjugate addition. JOURNAL OF CHEMICAL RESEARCH 2017. [DOI: 10.3184/174751917x14967701766987] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A concise stereoselective synthesis of proposed dehydroindolizidine-alkaloids of types 179 and 207E1 was accomplished via Michael-type conjugate addition. A comparison of natural 207E and synthesised compound 207E on GC–FTIR revealed the double bond of natural 207E is most likely at the 7,8-position.
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Affiliation(s)
- De-Jun Zhou
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Xue-Yan Li
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Dong Li
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Zhong-Shuai Guo
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Qin-Ling Zhang
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Hong-yan Bie
- School of Chemistry & Chemical Engineering, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Zheng-Guo Cui
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
- Graduate School of Medicine and Pharmaceutical Science, University of Toyama, 2630 Sugitani, Toyama 930-0194 Japan
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21
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Huang HM, Bonilla P, Procter DJ. Selective construction of quaternary stereocentres in radical cyclisation cascades triggered by electron-transfer reduction of amide-type carbonyls. Org Biomol Chem 2017; 15:4159-4164. [DOI: 10.1039/c7ob00739f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Radical cyclisation cascades triggered by electron-transfer to amide-type carbonyls using SmI2–H2O–LiBr, result in the selective construction of quaternary carbon stereocentres.
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Affiliation(s)
| | - Pablo Bonilla
- School of Chemistry
- University of Manchester
- Manchester
- UK
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