1
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Wang Y, Yang M, Lao C, Wang H, Jiang Z. Oxidative Cross-Coupling of α-Amino Ketones with Alcohols Enabled by I 2-Catalyzed C-H Hydroxylation. J Org Chem 2023; 88:14470-14486. [PMID: 37807762 PMCID: PMC10594655 DOI: 10.1021/acs.joc.3c01469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Indexed: 10/10/2023]
Abstract
An I2-catalyzed oxidative cross-coupling of α-amino ketones with a wide range of alcohols is described. Using a combination of air and dimethyl sulfoxide (DMSO) as oxidants, the protocol allows an efficient synthesis of α-carbonyl N,O-acetals with high functional group tolerance and enables the late-stage introduction of α-amino ketones into biorelevant alcohols. Moreover, the present method can be used in the coupling of α-amino ketones with other kinds of nucleophiles, which demonstrates great generality for the functionalization of α-amino ketones. A preliminary mechanistic investigation suggests that C-H hydroxylation of α-amino ketones has been recognized as the key step followed by subsequent dehydration coupling.
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Affiliation(s)
- Yingwei Wang
- State
Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau 999078, China
- School
of Chemical Engineering, Sichuan University
of Science & Engineering, Zigong 643000, China
| | - Mingrong Yang
- State
Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau 999078, China
| | - Chichou Lao
- State
Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau 999078, China
| | - Hanxuan Wang
- State
Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau 999078, China
| | - Zhihong Jiang
- State
Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau 999078, China
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2
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Singh M, Gaskins B, Johnson DR, Elles CG, Boskovic Z. Synthesis of Cycloheptatriene-Containing Azetidine Lactones. J Org Chem 2022; 87:15001-15010. [PMID: 35605105 PMCID: PMC10091648 DOI: 10.1021/acs.joc.2c00367] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
We prepared a collection of complex cycloheptatriene-containing azetidine lactones by applying two key photochemical reactions: "aza-Yang" cyclization and Buchner carbene insertion into aromatic rings. While photolysis of phenacyl amines leads to a rapid charge transfer and elimination, we found that a simple protonation of the amine enables the formation of azetidinols as single diastereomers. We provide evidence, through ultrafast spectroscopy, for the electron transfer from free amines in the excited state. Further, we characterize the aza-Yang reaction by establishing the dependence of the initial reaction rates on the rates of photon absorption. An unanticipated change in reactivity in morpholine analogues is explained through interactions with the tosylate anion. The Buchner reaction proceeds with a slight preference for one diastereomer over the other, and successful reaction requires electron-donating carbene-stabilizing substituents. Overall, 16 compounds were prepared over seven steps. Guided by an increase in structural complexity, efforts such as this one extend the reach of chemists into unexplored chemical space and provide useful quantities of new compounds for studies focused on their properties.
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Affiliation(s)
- Manvendra Singh
- Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Bryce Gaskins
- Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Daniel R Johnson
- Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Christopher G Elles
- Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Zarko Boskovic
- Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
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3
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Di Sabato A, D’Acunzo F, Filippini D, Vetica F, Brasiello A, Corinti D, Bodo E, Michenzi C, Panzetta E, Gentili P. Unusually Chemoselective Photocyclization of 2-(Hydroxyimino)aldehydes to Cyclobutanol Oximes: Synthetic, Stereochemical, and Mechanistic Aspects. J Org Chem 2022; 87:13803-13818. [PMID: 36198009 PMCID: PMC9639046 DOI: 10.1021/acs.joc.2c01503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Photocyclization of carbonyl compounds (known as the Norrish-Yang reaction) to yield cyclobutanols is, in general, accompanied by fragmentation reactions. The latter are predominant in the case of aldehydes so that secondary cyclobutanols are not considered accessible via the straightforward Norrish-Yang reaction. A noteworthy exception has been reported in our laboratory, where cyclobutanols bearing a secondary alcohol function were observed upon UV light irradiation of 2-(hydroxyimino)aldehydes (HIAs). This reaction is here investigated in detail by combining synthesis, spectroscopic data, molecular dynamics, and DFT calculations. The synthetic methodology is generally applicable to a series of HIAs, affording the corresponding cyclobutanol oximes (CBOs) chemoselectively (i.e., without sizable fragmentation side-reactions), diastereoselectively (up to >99:1), and in good to excellent yields (up to 95%). CBO oxime ether derivatives can be purified and diastereomers isolated by standard column chromatography. The mechanistic and stereochemical picture of this photocyclization reaction, as well as of the postcyclization E/Z isomerization of the oxime double bond is completed.
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Affiliation(s)
- Antonio Di Sabato
- Department
of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy,Institute
of Biological Systems (ISB), Sezione Meccanismi di Reazione, Italian
National Research Council (CNR), c/o Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Francesca D’Acunzo
- Institute
of Biological Systems (ISB), Sezione Meccanismi di Reazione, Italian
National Research Council (CNR), c/o Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Dario Filippini
- Department
of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Fabrizio Vetica
- Department
of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy,
| | - Antonio Brasiello
- Department
of Chemical Engineering Materials Environment, Sapienza University of Rome, via Eudossiana 18, 00184 Rome, Italy
| | - Davide Corinti
- Department
of Chemistry and Technology of Drugs, Sapienza
University of Rome, Piazzale
Aldo Moro 5, 00185 Rome, Italy
| | - Enrico Bodo
- Department
of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Cinzia Michenzi
- Department
of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Edoardo Panzetta
- Department
of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Patrizia Gentili
- Department
of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy,Institute
of Biological Systems (ISB), Sezione Meccanismi di Reazione, Italian
National Research Council (CNR), c/o Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy,
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4
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Xiong Y, Großkopf J, Jandl C, Bach T. Visible Light-Mediated Dearomative Hydrogen Atom Abstraction/ Cyclization Cascade of Indoles. Angew Chem Int Ed Engl 2022; 61:e202200555. [PMID: 35213774 PMCID: PMC9314014 DOI: 10.1002/anie.202200555] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Indexed: 11/24/2022]
Abstract
The photochemical synthesis of yet unknown 2‐oxospiro[azetidine‐3,3′‐indolines] (17 examples, 80–95 % yield), 2,4‐dioxospiro[azetidine‐3,3′‐indolines] (eight examples, 87–97 % yield), and 1‐oxo‐1,3‐dihydrospiro[indene‐2,3′‐indolines] (17 examples, 85–97 % yield) is described. Starting from readily accessible 3‐substituted indoles, a dearomatization of the indole core was accomplished upon irradiation at λ=420 nm in the presence of thioxanthen‐9‐one (10 mol%) as the sensitizer. Based on mechanistic evidence (triplet energy determination, deuteration experiments, by‐product analysis) it is proposed that the reaction proceeds by energy transfer via a 1,4‐ or 1,5‐diradical intermediate. The latter intermediates are formed by excited state hydrogen atom transfer from suitable alkyl groups within the C3 substituent to the indole C2 carbon atom. Subsequent ring closure proceeds with pronounced diastereoselectivity to generate a 4‐ or 5‐membered spirocyclic dearomatized product with several options for further functionalization.
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Affiliation(s)
- Yang Xiong
- Department Chemie and Catalysis Research Center (CRC), School of Natural Sciences, Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany
| | - Johannes Großkopf
- Department Chemie and Catalysis Research Center (CRC), School of Natural Sciences, Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany
| | - Christian Jandl
- Department Chemie and Catalysis Research Center (CRC), School of Natural Sciences, Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC), School of Natural Sciences, Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany
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5
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Xiong Y, Großkopf J, Jandl C, Bach T. Visible Light‐Mediated Dearomative Hydrogen Atom Abstraction/ Cyclization Cascade of Indoles. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200555] [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)
- Yang Xiong
- Technische Universität München: Technische Universitat Munchen Chemistry GERMANY
| | - Johannes Großkopf
- Technische Universität München: Technische Universitat Munchen Chemistry GERMANY
| | - Christian Jandl
- Technische Universität München: Technische Universitat Munchen Chemistry GERMANY
| | - Thorsten Bach
- Technische Universität München Lehrstuhl für Organische Chemie I Lichtenbergstr. 4 85747 Garching GERMANY
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6
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Photochemical synthesis and antimicrobial studies of new chromen-4-one based vinyl ethers. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2012.12.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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7
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Nieto J, Andrés C, Pérez-Encabo A. 7-endo selenocyclization reactions on chiral 3-prenyl and 3-cinnamyl-2-hydroxymethylperhydro-1,3-benzoxazine derivatives. A way to enantiopure 1,4-oxazepanes. Org Biomol Chem 2015. [PMID: 26223944 DOI: 10.1039/c5ob01297j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Enantiopure 1,4-oxazepane derivatives have been prepared by selenocyclofunctionalization of chiral 3-prenyl- and 3-cinnamyl-2-hydroxymethyl-substituted perhydro-1,3-benzoxazine derivatives. The 7-endo-cyclization occurs in high yields and diastereoselection. The regio- and stereochemistry of the cyclization products was dependent on the substitution pattern of the double bond, the nature of the hydroxyl group and the experimental conditions.
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Affiliation(s)
- Javier Nieto
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain.
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8
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Ishida N, Nečas D, Masuda Y, Murakami M. Enantioselective Construction of 3-Hydroxypiperidine Scaffolds by Sequential Action of Light and Rhodium upon N-Allylglyoxylamides. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502584] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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9
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Ishida N, Nečas D, Masuda Y, Murakami M. Enantioselective Construction of 3-Hydroxypiperidine Scaffolds by Sequential Action of Light and Rhodium upon N-Allylglyoxylamides. Angew Chem Int Ed Engl 2015; 54:7418-21. [DOI: 10.1002/anie.201502584] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Indexed: 11/06/2022]
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10
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Rai A, Yadav LDS. An organocatalytic approach to stereoselective synthesis of 2-hydroxyazetidines and 2-hydroxypyrrolidines. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.04.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Eftekhari-Sis B, Zirak M, Akbari A. Arylglyoxals in Synthesis of Heterocyclic Compounds. Chem Rev 2013; 113:2958-3043. [DOI: 10.1021/cr300176g] [Citation(s) in RCA: 228] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Bagher Eftekhari-Sis
- Department of Chemistry, Faculty
of Science, University of Maragheh, Golshahr,
P.O. Box. 55181-83111, Maragheh, Iran
| | - Maryam Zirak
- Department of Chemistry, Payame Noor University, P.O. Box 19395-3697, Tehran,
Iran
| | - Ali Akbari
- Department of Chemistry, Faculty
of Science, University of Maragheh, Golshahr,
P.O. Box. 55181-83111, Maragheh, Iran
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12
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Denis JB, Masson G, Retailleau P, Zhu J. Cinchona Alkaloid Amide Catalyzed Enantioselective Formal [2+2] Cycloadditions of Allenoates and Imines: Synthesis of 2,4-Disubstituted Azetidines. Angew Chem Int Ed Engl 2011; 50:5356-60. [DOI: 10.1002/anie.201100706] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Indexed: 11/06/2022]
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13
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Denis JB, Masson G, Retailleau P, Zhu J. Cinchona Alkaloid Amide Catalyzed Enantioselective Formal [2+2] Cycloadditions of Allenoates and Imines: Synthesis of 2,4-Disubstituted Azetidines. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201100706] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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14
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Dyachenko VD, Karpov EN. Aliphatic aldehydes in the synthesis of carbo- and heterocycles: Part II. Synthesis of six- and seven-membered rings, bicyclic compounds, and macrocycles. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2011. [DOI: 10.1134/s1070428011010015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Andrés C, Infante R, Nieto J. Perhydro-1,3-benzoxazines derived from (−)-8-aminomenthol as ligands for the catalytic enantioselective addition of diethylzinc to aldehydes. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.07.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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16
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Ye Y, Wang H, Fan R. Stereoselective Construction of Highly Functionalized Azetidines via a [2 + 2]-Cycloaddition. Org Lett 2010; 12:2802-5. [DOI: 10.1021/ol100885f] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yang Ye
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China, and Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Hua Wang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China, and Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Renhua Fan
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China, and Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China
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17
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Intermolecular Photocyclizations of N-(ω-Hydroxyalkyl)tetrachlorophthalimide with Alkenes Leading to Medium- and Large-Ring Heterocycles-Reaction Modes and Regio- and Stereoselectivity of the 1,n-Biradicals. Chemistry 2010; 16:2873-86. [DOI: 10.1002/chem.200902849] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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18
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Brandi A, Cicchi S, Cordero FM. Novel Syntheses of Azetidines and Azetidinones. Chem Rev 2008; 108:3988-4035. [DOI: 10.1021/cr800325e] [Citation(s) in RCA: 395] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Alberto Brandi
- Dipartimento di Chimica Organica “Ugo Schiff”, Laboratorio di Progettazione, Sintesi e Studio di Eterocicli Biologicamente Attivi - HeteroBioLab, Università degli Studi di Firenze, via della Lastruccia 13, 50019 Sesto F.no (FI), Italy
| | - Stefano Cicchi
- Dipartimento di Chimica Organica “Ugo Schiff”, Laboratorio di Progettazione, Sintesi e Studio di Eterocicli Biologicamente Attivi - HeteroBioLab, Università degli Studi di Firenze, via della Lastruccia 13, 50019 Sesto F.no (FI), Italy
| | - Franca M. Cordero
- Dipartimento di Chimica Organica “Ugo Schiff”, Laboratorio di Progettazione, Sintesi e Studio di Eterocicli Biologicamente Attivi - HeteroBioLab, Università degli Studi di Firenze, via della Lastruccia 13, 50019 Sesto F.no (FI), Italy
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19
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Affiliation(s)
- Norbert Hoffmann
- Laboratoire des Réactions Sélectives et Applications, UMR 6519 CNRS et Université de Reims Champagne-Ardenne, UFR Sciences, B.P. 1039, F-51687 Reims, Cedex 02, France
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20
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Banide E, Lemau de Talancé V, Schmidt G, Lubin H, Comesse S, Dechoux L, Hamon L, Kadouri-Puchot C. On the Synthesis and Reactivity of Enantiopure Azetidines. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700283] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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21
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Pedrosa R, Andrés C, Mendiguchía P, Nieto J. Diastereoselective synthesis of enantiopure morpholines by electrophilic selenium-induced 6-exo cyclizations on chiral 3-allyl-2-hydroxymethylperhydro-1,3-benzoxazine derivatives. J Org Chem 2007; 71:8854-63. [PMID: 17081016 DOI: 10.1021/jo061547k] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Enantiopure morpholine derivatives have been prepared by selenocyclofunctionalization of chiral 3-allyl-2-hydroxymethyl-substituted perhydro-1,3-benzoxazine derivatives. The cyclization occurs in high yields and diastereoselection, although the temperature of the reaction and the structure of the substituent at C-2 and the substitution pattern of the double bond can modify the regio- and stereochemistry of the final products.
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Affiliation(s)
- Rafael Pedrosa
- Departamento de Química Organica, Facultad de Ciencias, Universidad de Valladolid, Dr. Mergelina s/n, 47011-Valladolid, Spain.
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22
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23
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Lait SM, Rankic DA, Keay BA. 1,3-Aminoalcohols and Their Derivatives in Asymmetric Organic Synthesis. Chem Rev 2007; 107:767-96. [PMID: 17319729 DOI: 10.1021/cr050065q] [Citation(s) in RCA: 195] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Susan M Lait
- Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, Alberta, Canada T1K 3M4
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24
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Pedrosa R, Andrés C, Arias R, Mendiguchía P, Nieto J. Regio- and Stereoselective Methoxyselenenylation of Chiral 2-Vinyl Perhydro-1,3-benzoxazines Promoted by Selenium-Heteroatom Nonbonded Interactions. J Org Chem 2006; 71:2424-8. [PMID: 16526793 DOI: 10.1021/jo052582e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Regio- and diastereoselective methoxyselenenylations of double bonds attached to the N,O-ketalic carbon of chiral perhydrobenzoxazines occur in high yields by reaction with benzeneselenenyl chloride in dichloromethane-methanol. The diastereoselection is dependent on the reaction conditions and the structure of the starting compounds and can be rationalized by accepting the coordination of the selenium to the oxygen atom of the heterocycle.
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Affiliation(s)
- Rafael Pedrosa
- Departamento de Química Organica, Facultad de Ciencias, Universidad de Valladolid, Dr. Mergelina s/n, 47011-Valladolid, Spain.
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25
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de Talancé VL, Banide E, Bertin B, Comesse S, Kadouri-Puchot C. Synthesis of enantiopure azetidines: a route to new β-amino alcohols. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.09.061] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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