1
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Xu WK, Guo JM, Liu CH, Sun JT, Lv M, Wei BG. AgNTf 2 catalyzed cycloaddition of N-acyliminium ions with alkynes for the synthesis of the 3,4-dihydro-1,3-oxazin-2-one skeleton. Org Biomol Chem 2022; 20:5086-5094. [PMID: 35698865 DOI: 10.1039/d2ob00900e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A catalyzed process for the synthesis of the 4,6-substituted 3,4-dihydro-1,3-oxazin-2-one skeleton has been developed through cycloaddition of in situ generated acyliminium intermediates with alkynes. A range of chain N,O-acetals and terminal alkynes were amenable for this mild transformation. As a result, a series of desired cycloaddition products were obtained in moderate to good yields.
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Affiliation(s)
- Wen-Ke Xu
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.
| | - Jia-Ming Guo
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.
| | - Chang-Hong Liu
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.
| | - Jian-Ting Sun
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.
| | - Min Lv
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.
| | - Bang-Guo Wei
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.
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2
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Owen NJ, McLaughlin MG. Aza-[4 + 2] cycloadditions employing catalytically derived N-acyliminium ions. Org Biomol Chem 2022; 20:8209-8211. [DOI: 10.1039/d2ob01663j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
An aza-[4 + 2] cycloaddition employing N-acyliminium ions is reported, allowing access to novel fused ring systems.
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Affiliation(s)
- Niamh J. Owen
- Department of Chemistry, Lancaster University, Bailrigg, LA14YB, UK
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3
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Chortani S, Othman M, Lawson AM, Romdhane A, Ben Jannet H, Knorr M, Brieger L, Strohmann C, Daïch A. Aza-heterocyclic frameworks through intramolecular π-system trapping of spiro- N-acyliminiums generated from isoindolinone. NEW J CHEM 2021. [DOI: 10.1039/d0nj04052e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spiro-acetoxylactams, obtained easily by the tandem carbonyl reduction/O-acylation, were submitted to acids giving through π-cationic cyclization aza-heterocyclic systems including amino-acids.
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Affiliation(s)
| | | | | | - Anis Romdhane
- Laboratory of Heterocyclic Chemistry
- LR11ES39
- Faculty of Science of Monastir
- University of Monastir
- Avenue of Environment
| | - Hichem Ben Jannet
- Laboratory of Heterocyclic Chemistry
- LR11ES39
- Faculty of Science of Monastir
- University of Monastir
- Avenue of Environment
| | - Michael Knorr
- Institut UTINAM-UMR CNRS 6213
- Université Bourgogne Franche-Comté
- 25030 Besançon
- France
| | - Lukas Brieger
- Anorganische Chemie
- Technische Universität Dortmund
- 44227 Dortmund
- Germany
| | - Carsten Strohmann
- Anorganische Chemie
- Technische Universität Dortmund
- 44227 Dortmund
- Germany
| | - Adam Daïch
- Normandie Univ
- UNILEHAVRE
- FR 3038 CNRS
- URCOM
- 76600 Le Havre
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4
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Affiliation(s)
- Manisha Tripathy
- Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany
| | - Christoph Schneider
- Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany
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5
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Basson AJ, McLaughlin MG. Synthesis of Functionalized Isoindolinones via Calcium Catalyzed Generation and Trapping of N-Acyliminium Ions. J Org Chem 2020; 85:5615-5628. [PMID: 32208694 DOI: 10.1021/acs.joc.0c00482] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Herein we report our full investigation into the calcium catalyzed generation and trapping of N-acyliminium ions from readily available 3-hydroxyisoindolinones. We have successfully employed a range of traditional nucleophiles including carbon, nitrogen, and sulfur containing reactive partners. The reaction is tolerant to a wide range of functionalities and provides high value scaffolds in good to excellent yields.
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Affiliation(s)
- Ashley J Basson
- Department of Natural Sciences, Manchester Metropolitan University, Chester Street, Manchester, United Kingdom, M15GD
| | - Mark G McLaughlin
- Department of Natural Sciences, Manchester Metropolitan University, Chester Street, Manchester, United Kingdom, M15GD
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6
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Sahu AK, Unnava R, Shit S, Saikia AK. In(OTf) 3-Catalyzed One-Pot Tandem Mannich and Conia-Ene Cyclization Reaction of N-Propargyl Amido Alcohols with 1,3-Dicarbonyl Compounds: An Approach To Construct Tetrahydro-1 H-pyrrolo[2,1- a]isoindolone-1,1-dicarboxylate and Its Application. J Org Chem 2020; 85:1961-1971. [PMID: 31912735 DOI: 10.1021/acs.joc.9b02686] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A one-pot tandem reaction has been developed for the synthesis of substituted tetrahydropyrroloisoindolone via Mannich reaction of N-propargyl amido alcohols with 1,3-dicarbonyl compounds followed by Conia-ene cyclization reaction in moderate to good yields catalyzed by indium(III)triflate [In(OTf)3]. The reaction is highly regioselective with an exo-cyclic double bond in the pyrrolidine ring. The substituted tetrahydropyrroloisoindolone can be converted to 5H-pyrrolo[2,1-a]isoindol-5-one via decarboxylative aromatization reaction.
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Affiliation(s)
- Archana Kumari Sahu
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
| | - Ramanjaneyulu Unnava
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
| | - Sudip Shit
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
| | - Anil K Saikia
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
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7
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Babu VN, Murugan A, Katta N, Devatha S, Sharada DS. Exocyclic N-Acyliminium Ion (NAI) Cyclization: Access to Fully Substituted Oxazoles and Furocoumarins. J Org Chem 2019; 84:6631-6641. [DOI: 10.1021/acs.joc.9b00096] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Venkata Nagarjuna Babu
- Catalysis & Chemical Biology Laboratory, Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi 502285, Sangareddy, Telangana, India
| | - Arumugavel Murugan
- Catalysis & Chemical Biology Laboratory, Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi 502285, Sangareddy, Telangana, India
| | - Narenderreddy Katta
- Catalysis & Chemical Biology Laboratory, Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi 502285, Sangareddy, Telangana, India
| | - Suman Devatha
- Catalysis & Chemical Biology Laboratory, Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi 502285, Sangareddy, Telangana, India
| | - Duddu S. Sharada
- Catalysis & Chemical Biology Laboratory, Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi 502285, Sangareddy, Telangana, India
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8
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Das M, Saikia AK. Stereoselective Synthesis of Pyrroloisoindolone and Pyridoisoindolone via aza-Prins Cyclization of Endocyclic N-Acyliminium Ions. J Org Chem 2018; 83:6178-6185. [DOI: 10.1021/acs.joc.8b00440] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Malay Das
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Anil K. Saikia
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
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9
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Borah M, Saikia AK. FeCl3
-Mediated Carbenium Ion-Induced Intramolecular Cyclization of N
-Tethered Alkyne-Benzyl Alkanols. ChemistrySelect 2018. [DOI: 10.1002/slct.201702776] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Madhurjya Borah
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati - 781039, Assam India
| | - Anil K. Saikia
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati - 781039, Assam India
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10
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Berthet M, Beauseigneur A, Moine C, Taillier C, Othman M, Dalla V. Novel Hybrid Prins/Aza-Prins Oxocarbenium/N-Acyliminium Cascade: Expedient Access to Complex Indolizidines. Chemistry 2018; 24:1278-1282. [PMID: 29265547 DOI: 10.1002/chem.201705949] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Indexed: 01/02/2023]
Abstract
Heavy silyl enol ethers (mostly TIPS and TBS) combine with cyclic N-alkenyl N-acyliminium salts generated in situ from their N,O-acetal precursors, to furnish highly functionalized indolizidines through an unprecedented double Mukaiyama-Mannich-Prins cascade transformation. This novel cascade annulation process demonstrates a promising scope, and takes place mostly catalytically with interesting stereocontrol. Furthermore, an appealing facet of this chemistry is emphasized with a bicatalytic approach by which the Mannich-Prins cascade follows a Ru-catalyzed N-allylamide to N-(E)-propenyl isomerization of the aminal counterpart in a one-pot operation.
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Affiliation(s)
- Mathéo Berthet
- UNIHAVRE, FR 3032, URCOM EA 3221, 25 rue Philippe Lebon, BP 540, 76058, Le Havre, France
| | - Alice Beauseigneur
- UNIHAVRE, FR 3032, URCOM EA 3221, 25 rue Philippe Lebon, BP 540, 76058, Le Havre, France
| | - Charlotte Moine
- UNIHAVRE, FR 3032, URCOM EA 3221, 25 rue Philippe Lebon, BP 540, 76058, Le Havre, France
| | - Catherine Taillier
- UNIHAVRE, FR 3032, URCOM EA 3221, 25 rue Philippe Lebon, BP 540, 76058, Le Havre, France
| | - Mohamed Othman
- UNIHAVRE, FR 3032, URCOM EA 3221, 25 rue Philippe Lebon, BP 540, 76058, Le Havre, France
| | - Vincent Dalla
- UNIHAVRE, FR 3032, URCOM EA 3221, 25 rue Philippe Lebon, BP 540, 76058, Le Havre, France
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11
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Lu Y, Alujas-Burgos S, Oliveras-González C, Vázquez-Jiménez L, Rojo P, Álvarez-Larena Á, Bayón P, Figueredo M. Enantioselective approach to indolizidine and quinolizidine scaffolds. Application to the synthesis of peptide mimics. Tetrahedron 2018. [DOI: 10.1016/j.tet.2017.11.042] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Peter C, Geoffroy P, Miesch M. Highly diastereoselective access to polyfunctionalized 1,3-oxazines promoted by Brønsted/Lewis acids. Org Chem Front 2018. [DOI: 10.1039/c7qo00891k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Brønsted/Lewis acid catalyzed reaction of α-alkyloxyamides tethered to α,β-unsaturated ketones (aldehydes) afforded exclusively polyfunctionalized 1,3-oxazines with high diastereoselectivities and in high yields.
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Affiliation(s)
- Clovis Peter
- Université de Strasbourg
- Institut de Chimie
- UMR CNRS/UdS 7177
- 67081 Strasbourg-Cedex
- France
| | - Philippe Geoffroy
- Université de Strasbourg
- Institut de Chimie
- UMR CNRS/UdS 7177
- 67081 Strasbourg-Cedex
- France
| | - Michel Miesch
- Université de Strasbourg
- Institut de Chimie
- UMR CNRS/UdS 7177
- 67081 Strasbourg-Cedex
- France
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13
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Mahía A, Badorrey R, Gálvez JA, Díaz-de-Villegas MD. Diastereoselective Construction of the 6-Oxa-2-azabicyclo[3.2.1]octane Scaffold from Chiral α-Hydroxyaldehyde Derivatives by the Aza-Prins Reaction. J Org Chem 2017; 82:8048-8057. [DOI: 10.1021/acs.joc.7b01291] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alejandro Mahía
- Instituto
de Síntesis Química y Catálisis
Homogénea (ISQCH), CSIC—Universidad de Zaragoza, Departamento
de Química Orgánica, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Ramón Badorrey
- Instituto
de Síntesis Química y Catálisis
Homogénea (ISQCH), CSIC—Universidad de Zaragoza, Departamento
de Química Orgánica, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - José A. Gálvez
- Instituto
de Síntesis Química y Catálisis
Homogénea (ISQCH), CSIC—Universidad de Zaragoza, Departamento
de Química Orgánica, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - María D. Díaz-de-Villegas
- Instituto
de Síntesis Química y Catálisis
Homogénea (ISQCH), CSIC—Universidad de Zaragoza, Departamento
de Química Orgánica, Pedro Cerbuna 12, 50009 Zaragoza, Spain
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14
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Unnava R, Sahu AK, Saikia AK. Intramolecular Pictet-Spengler Reaction of Cyclic Iminium ions: A Novel Access to Benzo[1,4]oxazepine-Fused Tetrahydroisoquinoline and Tetrahydro-β-carboline Analogues. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700211] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ramanjaneyulu Unnava
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781039 Assam India
| | - Archana K. Sahu
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781039 Assam India
| | - Anil K. Saikia
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781039 Assam India
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15
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Affiliation(s)
- Peng Wu
- Department
of Chemistry, Technical University of Denmark, Kongens Lyngby DK-2800, Denmark
- Department
of Immunology and Microbiology, University of Copenhagen, Copenhagen DK-2200, Denmark
- Center
for the Science of Therapeutics, Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, United States
- Department
of Medicine, Harvard Medical School, Boston, Massachusetts 02115, United States
- Renal
Division, Brigham and Women’s Hospital, Boston, Massachusetts 02115, United States
| | - Thomas E. Nielsen
- Department
of Chemistry, Technical University of Denmark, Kongens Lyngby DK-2800, Denmark
- Department
of Immunology and Microbiology, University of Copenhagen, Copenhagen DK-2200, Denmark
- Singapore
Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore 637551, Singapore
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16
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Subba Reddy BV, Nair PN, Antony A, Lalli C, Grée R. The Aza-Prins Reaction in the Synthesis of Natural Products and Analogues. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601411] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- B. V. Subba Reddy
- Centre for Semio Chemicals; CSIR-Indian Institute of Chemical Technology; Hyderabad India
| | - Preethi Narayanan Nair
- Centre for Semio Chemicals; CSIR-Indian Institute of Chemical Technology; Hyderabad India
| | - Aneesh Antony
- Centre for Semio Chemicals; CSIR-Indian Institute of Chemical Technology; Hyderabad India
| | - Claudia Lalli
- Université de Rennes 1; Institut des Sciences Chimiques de Rennes, CNRS UMR 6226; Avenue du Pr. Léon Bernard 35043 Rennes-Cedex France
| | - René Grée
- Université de Rennes 1; Institut des Sciences Chimiques de Rennes, CNRS UMR 6226; Avenue du General Leclerc 35042 Rennes-Cedex France
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17
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Chiou WH, Chen HY. Synthesis of dendrobatid alkaloid (+)-167B and (+)-209D and the investigation of diastereoselectivity using DFT calculations. RSC Adv 2017. [DOI: 10.1039/c6ra24960d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The synthesis of dendrobatid alkaloid (+)-167B and (+)-209D has been developed on the basis of the effective preparation of chiral tropinone 7-azabicyclo[3.2.1]octan-6-ol.
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Affiliation(s)
- Wen-Hua Chiou
- Department of Chemistry
- National Chung Hsing University
- Taichung
- ROC
| | - Hao-Yu Chen
- Department of Chemistry
- National Chung Hsing University
- Taichung
- ROC
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18
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Borthakur U, Borah M, Deka MJ, Saikia AK. Synthesis of Tetrahydro-1H-indeno[1,2-b]pyridine via Cascade Cyclization and Friedel–Crafts Reaction. J Org Chem 2016; 81:8736-8743. [DOI: 10.1021/acs.joc.6b00988] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Upasana Borthakur
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Madhurjya Borah
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Manash J. Deka
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Anil K. Saikia
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
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19
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Liu GQ, Cui B, Xu R, Li YM. Preparation of trans-2-Substituted-4-halopiperidines and cis-2-Substituted-4-halotetrahydropyrans via AlCl3-Catalyzed Prins Reaction. J Org Chem 2016; 81:5144-61. [PMID: 27214117 DOI: 10.1021/acs.joc.6b00725] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A general and practical method for the preparation of trans-2-substituted-4-halopiperidines and cis-2-substituted-4-halotetrahydropyrans is reported. Using 5 mol % of AlCl3 as the catalyst and 2 equiv of trimethylsilyl halides as the halide sources, aza-Prins cyclization of N-tosyl homoallylamine or Prins cyclization of homoallylic alcohol with carbonyl compounds could be readily realized, giving the corresponding trans-2-substituted-4-halopiperidines or cis-2-substituted-4-halotetrahydropyrans in high yields and satisfactory diastereoselectivity.
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Affiliation(s)
- Gong-Qing Liu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , Tianjin 300071, People's Republic of China
| | - Bin Cui
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , Tianjin 300071, People's Republic of China
| | - Rong Xu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , Tianjin 300071, People's Republic of China
| | - Yue-Ming Li
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , Tianjin 300071, People's Republic of China
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20
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Unnava R, Deka MJ, Saikia AK. Synthesis of Highly Substituted 4‐Iodopyrazole
N
‐oxides and Pyrazoles from Propargylamines. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Ramanjaneyulu Unnava
- Department of ChemistryIndian Institute of Technology Guwahati Guwahati 781039 Assam India
| | - Manash J. Deka
- Department of ChemistryIndian Institute of Technology Guwahati Guwahati 781039 Assam India
| | - Anil K. Saikia
- Department of ChemistryIndian Institute of Technology Guwahati Guwahati 781039 Assam India
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21
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Saikia AK, Ghosh P, Kautarya AK. Synthesis of 4-trifluoromethanesulfonate substituted 3,6-dihydropyrans and their application in various C–C coupling reactions. RSC Adv 2016. [DOI: 10.1039/c6ra02343f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Triflic acid is used for Prins cyclization of homopropargyl alcohols with aldehydes to give 3,6-dihydro-2H-pyran-4-yl trifluoromethanesulfonates. The dihydropyran is converted into 4-alkyl and aryl substituted products using cross-coupling reactions.
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Affiliation(s)
- Anil K. Saikia
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati
- India
| | - Priya Ghosh
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati
- India
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22
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Chio FKI, Guesné SJJ, Hassall L, McGuire T, Dobbs AP. Synthesis of Azabicycles via Cascade Aza-Prins Reactions: Accessing the Indolizidine and Quinolizidine Cores. J Org Chem 2015; 80:9868-80. [DOI: 10.1021/acs.joc.5b01301] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Freda K. I. Chio
- School of Biological & Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
| | | | | | - Thomas McGuire
- AstraZeneca, Alderley Park, Cheshire, SK10 4TG, United Kingdom
| | - Adrian P. Dobbs
- School of Biological & Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
- Department
of Chemistry, University of Exeter, Devon EX4 4QD, United Kingdom
- School
of Science, University of Greenwich, Chatham Maritime, Kent ME4 4TB, United Kingdom
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23
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Deka MJ, Indukuri K, Sultana S, Borah M, Saikia AK. Synthesis of Five-, Six-, and Seven-Membered 1,3- and 1,4-Heterocyclic Compounds via Intramolecular Hydroalkoxylation/Hydrothioalkoxylation of Alkenols/Thioalkenols. J Org Chem 2015; 80:4349-59. [DOI: 10.1021/acs.joc.5b00049] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Manash J. Deka
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India
| | - Kiran Indukuri
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India
| | - Sabera Sultana
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India
| | - Madhurjya Borah
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India
| | - Anil K. Saikia
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India
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