1
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Bora SK, Biswas S, Behera BK, Saikia AK. Stereoselective synthesis of gem-dihalopiperidines via the halo-aza-Prins cyclization reaction: access to piperidin-4-ones and pyridines. Org Biomol Chem 2024; 22:3893-3903. [PMID: 38654601 DOI: 10.1039/d4ob00338a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
An efficient methodology for the synthesis of 4,4-dihalopiperidine derivatives in excellent yields has been developed using N-(3-halobut-3-en-1-yl)-4-methylbenzenesulfonamide and an aldehyde catalyzed by In(OTf)3. The reaction involves an initial formation of a six-membered carbocation via the aza-Prins cyclization reaction followed by a nucleophilic attack by a halide ion to give 4,4-dihalopiperidine. The dihalopiperidine is converted to tetrahydropiperidinone using Ac2O/Et3N in DCM/H2O (1 : 1). It is also utilized for the synthesis of pyridine scaffolds by treatment with DBU. Furthermore, the dihalopiperidine is transformed to its enol ether derivatives using KOH in alcohol.
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Affiliation(s)
- Surjya Kumar Bora
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Subhamoy Biswas
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Bipin Kumar Behera
- 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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2
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Yi ZJ, Sun JT, Yang TY, Yu XY, Han XL, Wei BG. Cu(OTf) 2-catalyzed C3 aza-Friedel-Crafts alkylation of indoles with N, O-acetals. Org Biomol Chem 2022; 20:2261-2270. [PMID: 35229848 DOI: 10.1039/d1ob02383g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
An efficient approach to access functionalized indole derivatives has been developed through Cu(OTf)2-catalyzed C3 aza-Friedel-Crafts alkylation of substituted indoles 5a-5m, N-methyl-pyrrole with linear N,O-acetals 4a-4l. As a result, a series of C3 amide aza-alkylated indole derivatives 6a-6ag and 7 were synthesized in moderate to excellent yields.
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Affiliation(s)
- Zi-Juan Yi
- Key Laboratory of Theoretical Organic Chemistry Functional Molecule, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, People's Republic of China. .,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.
| | - Tian-Yu Yang
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.
| | - Xian-Yong Yu
- Key Laboratory of Theoretical Organic Chemistry Functional Molecule, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, People's Republic of China.
| | - Xiao-Li Han
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China. .,Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, Jinhua 321004, China
| | - Bang-Guo Wei
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.
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3
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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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4
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Han X, Nie X, Feng Y, Wei B, Si C, Lin G. Intermolecular [4 + 2] process of N-acyliminium ions with simple olefins for construction of functional substituted-1,3-oxazinan-2-ones. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.05.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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5
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Zheng J, Meng S, Wang Q. Cascade intramolecular Prins/Friedel-Crafts cyclization for the synthesis of 4-aryltetralin-2-ols and 5-aryltetrahydro-5 H-benzo[7]annulen-7-ols. Beilstein J Org Chem 2021; 17:1481-1489. [PMID: 34239615 PMCID: PMC8239259 DOI: 10.3762/bjoc.17.104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 06/14/2021] [Indexed: 12/13/2022] Open
Abstract
The treatment of 2-(2-vinylphenyl)acetaldehydes or 3-(2-vinylphenyl)propanals with BF3·Et2O results in an intramolecular Prins reaction affording intermediary benzyl carbenium ions, which are then trapped by a variety of electron-rich aromatics via Friedel–Crafts alkylation. This cascade Prins/Friedel–Crafts cyclization protocol paves an expedient path to medicinally useful 4-aryltetralin-2-ol and 5-aryltetrahydro-5H-benzo[7]annulen-7-ol derivatives.
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Affiliation(s)
- Jie Zheng
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, P. R. China
| | - Shuyu Meng
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, P. R. China
| | - Quanrui Wang
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, P. R. China
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6
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Krishna Y, Tanaka F. Intramolecular Formal [4 + 2] Cycloadditions: Synthesis of Spiro Isoindolinone Derivatives and Related Molecules. Org Lett 2021; 23:1874-1879. [PMID: 33601884 DOI: 10.1021/acs.orglett.1c00283] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Acid-catalyzed intramolecular reactions of isoindolinone-derived hydroxylactam derivatives bearing enones or enals that afford spiro isoindolinone derivatives and related molecules have been developed. From the hydroxylactam moieties, N-acylenamides were generated in situ and reacted with the enone and the enal moieties via formal [4 + 2] cycloaddition reactions to construct cyclohexanone- and dihydropyran-fused ring systems and the spiro ring systems.
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Affiliation(s)
- Yarkali Krishna
- Chemistry and Chemical Bioengineering Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna, Okinawa 904-0495, Japan
| | - Fujie Tanaka
- Chemistry and Chemical Bioengineering Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna, Okinawa 904-0495, Japan
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7
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Mittapalli RR, Coles SJ, Klooster WT, Dobbs AP. A Stereoselective aza-Prins Reaction: Rapid Access to Enantiopure Piperidines and Pipecolic Acids. J Org Chem 2021; 86:2076-2089. [PMID: 33417453 DOI: 10.1021/acs.joc.0c01897] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The aza-Prins reaction is a widely employed and highly efficient method for the preparation of saturated nitrogen-containing heterocycles. Its major drawback has always been a lack of diastereoselectivity and the formation of racemic products. Herein, we address these problems and report, for the first time, the synthesis of both diastereomerically and enantiopure multiply substituted piperidines via the aza-Prins reaction. This method is widely applicable for natural product synthesis and is exemplified here by the synthesis of enantiopure pipecolic acid derivatives.
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Affiliation(s)
| | - Simon J Coles
- UK National Crystallography Service, University of Southampton, University Road, Southampton SO17 1BJ, United Kingdom
| | - Wim T Klooster
- UK National Crystallography Service, University of Southampton, University Road, Southampton SO17 1BJ, United Kingdom
| | - Adrian P Dobbs
- School of Science, University of Greenwich, Chatham Maritime, Kent ME4 4TB, United Kingdom
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8
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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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9
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Padmaja P, Reddy PN, Subba Reddy BV. Tandem Prins cyclizations for the construction of oxygen containing heterocycles. Org Biomol Chem 2020; 18:7514-7532. [PMID: 32940271 DOI: 10.1039/d0ob00960a] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Tandem Prins cyclization is a versatile method for the synthesis of fused/bridged/spirotetrahydropyran scaffolds. Therefore, it has become a powerful tool for the stereoselective synthesis of oxygen/nitrogen containing heterocycles. Indeed, previous review articles on Prins spirocyclization illustrate the synthesis of spirotetrahydropyran derivatives and the aza-Prins reaction demonstrates its application in the total synthesis of natural products. The current review is devoted specifically to highlight tandem Prins cyclizations for the construction of fused scaffolds and related frameworks with a particular emphasis on recent applications. The mechanistic aspects and the scope of the methods are briefly discussed herein.
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Affiliation(s)
- P Padmaja
- Fluoro & Agrochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, India.
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10
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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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11
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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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12
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Yadav M, Pandhade KR, Argade NP. Chemoselective Ring Closure of 4-(3-Methyl-2-oxo-2,5-dihydro-1 H-pyrrol-1-yl)butanal Leading to Pandalizine A. ACS OMEGA 2020; 5:859-863. [PMID: 31956837 PMCID: PMC6964528 DOI: 10.1021/acsomega.9b03760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 12/18/2019] [Indexed: 06/10/2023]
Abstract
Starting from methylmaleic anhydride, a facile total synthesis of pandalizine A alkaloid is described via the regioselective reduction of methylmaleimide and acid-catalyzed enolization of 4-(3-methyl-2-oxo-2,5-dihydro-1H-pyrrol-1-yl)butanal followed by chemoselective intramolecular dehydrative cyclization as the key steps. It is noteworthy that the analogous model system with an additional β-methyl group followed an alternative chemoselective intermolecular aldol condensation pathway.
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Affiliation(s)
- Mahesh
B. Yadav
- Division of Organic
Chemistry, National Chemical Laboratory
(CSIR), Pune 411 008, India
- Academy
of Scientific and Innovative Research (AcSIR), New Delhi 110 025, India
| | - Kailas R. Pandhade
- Division of Organic
Chemistry, National Chemical Laboratory
(CSIR), Pune 411 008, India
- Academy
of Scientific and Innovative Research (AcSIR), New Delhi 110 025, India
| | - Narshinha P. Argade
- Division of Organic
Chemistry, National Chemical Laboratory
(CSIR), Pune 411 008, India
- Academy
of Scientific and Innovative Research (AcSIR), New Delhi 110 025, India
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13
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Krishna Y, Shilpa K, Tanaka F. Intramolecular Mannich and Michael Annulation Reactions of Lactam Derivatives Bearing Enals To Afford Bicyclic N-Heterocycles. Org Lett 2019; 21:8444-8448. [DOI: 10.1021/acs.orglett.9b03210] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yarkali Krishna
- Chemistry and Chemical Bioengineering Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna, Okinawa 904-0495, Japan
| | - Kola Shilpa
- Chemistry and Chemical Bioengineering Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna, Okinawa 904-0495, Japan
| | - Fujie Tanaka
- Chemistry and Chemical Bioengineering Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna, Okinawa 904-0495, Japan
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14
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Wippert NA, Jung N, Bräse S. Synthesis of Arylamides via Ritter-Type Cleavage of Solid-Supported Aryltriazenes. ACS COMBINATORIAL SCIENCE 2019; 21:568-572. [PMID: 31264846 DOI: 10.1021/acscombsci.9b00096] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel route for the synthesis of N-arylamides via the cleavage of aryltriazenes with alkyl or aryl nitriles is presented. We developed a variation of the Ritter reaction that allows the use of acetonitrile as solvent and reagent in reactions with solid-supported precursors. The reaction was optimized for the generation of N-aryl acetamides using a diverse range of immobilized building blocks including o-, m-, and p-substituted aryltriazenes. The cleavage via the Ritter-type conversion was combined with an on-bead cross-coupling reaction of halogen-substituted aryltriazenes with pyrazoles. Additionally, the synthesis of on-bead generated arylboronic ester-substituted triazenes was shown. The developed procedure was further expanded to use other commercially available nitriles, such as acrylonitrile, benzonitrile, and chlorinated alkyl nitriles as suitable reagents for a Ritter-type cleavage of the prepared triazene linkers.
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Affiliation(s)
- Nicolai A. Wippert
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Campus North, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Nicole Jung
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Campus North, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| | - Stefan Bräse
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Campus North, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
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15
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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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16
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Xu W, Tang L, Ge C, Chen J, Zhou L. Synthesis of Tetrahydroisoindolinones via a Metal‐Free Dehydrogenative Diels‐Alder Reaction. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801436] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Wen‐Lei Xu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry& Materials Science, National Demonstration Center for Experimental Chemistry EducationNorthwest University Xi'an 710127 People's Republic of China
| | - Lei Tang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry& Materials Science, National Demonstration Center for Experimental Chemistry EducationNorthwest University Xi'an 710127 People's Republic of China
| | - Chen‐Yu Ge
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry& Materials Science, National Demonstration Center for Experimental Chemistry EducationNorthwest University Xi'an 710127 People's Republic of China
| | - Jie Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry& Materials Science, National Demonstration Center for Experimental Chemistry EducationNorthwest University Xi'an 710127 People's Republic of China
| | - Ling Zhou
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry& Materials Science, National Demonstration Center for Experimental Chemistry EducationNorthwest University Xi'an 710127 People's Republic of China
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17
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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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18
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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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19
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Bolsakova J, Jirgensons A. The Ritter reaction for the synthesis of heterocycles. Chem Heterocycl Compd (N Y) 2018. [DOI: 10.1007/s10593-018-2189-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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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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21
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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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22
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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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23
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Chen L, Teng W, Geng XL, Zhu YF, Guan YH, Fan X. Facile synthesis of indene and fluorene derivatives through AlCl3
-catalyzed cyclization of in situ formed iminium ions. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3863] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Lei Chen
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; Lanzhou 730070 China
| | - Wei Teng
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; Lanzhou 730070 China
| | - Xin-Le Geng
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; Lanzhou 730070 China
| | - Yi-Fan Zhu
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; Lanzhou 730070 China
| | - Yong-Hong Guan
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; Lanzhou 730070 China
| | - Xiaohui Fan
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; Lanzhou 730070 China
- Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry; Peking University; Beijing 100871 China
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine; Yunnan Minzu University; Kunming 650500 China
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24
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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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25
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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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26
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Liu Y, Yeung YY. Ring strain-dictated divergent fluorinating Prins cyclization or semipinacol rearrangement. Org Biomol Chem 2017; 15:6478-6482. [DOI: 10.1039/c7ob01567d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have developed ring-strain dictated divergent diastereoselective fluorinating Prins cyclizations or semipinacol rearrangements to access a range of tetrahydropyran derivatives.
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Affiliation(s)
- Yi Liu
- Department of Chemistry
- National University of Singapore
- Singapore 117543
| | - Ying-Yeung Yeung
- Department of Chemistry
- National University of Singapore
- Singapore 117543
- Department of Chemistry
- The Chinese University of Hong Kong
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27
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Brethon A, Bouix-Peter C, Clary L, Fournier JF, Harris CS, Lardy C, Roche D, Rodeschini V, Talano S. An expedient synthesis of non-racemic N-alkylated pyrrolidin-2,5-diones and piperidin-2,6-diones as peptidomimetics. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.11.083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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28
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Tang Z, Liu Z, An Y, Jiang R, Zhang X, Li C, Jia X, Li J. Isocyanide-Based Multicomponent Bicyclization with Substituted Allenoate and Isatin: Synthesis of Unusual Spirooxindole Containing [5.5]-Fused Heterocycle. J Org Chem 2016; 81:9158-9166. [DOI: 10.1021/acs.joc.6b01711] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Zhongzhong Tang
- Department of Chemistry,
Innovative Drug Research Center, and ‡Shanghai Key Laboratory of High
Temperature Superconductors, Shanghai University, Shanghai 200444, People’s Republic of China
| | - Zhiqiang Liu
- Department of Chemistry,
Innovative Drug Research Center, and ‡Shanghai Key Laboratory of High
Temperature Superconductors, Shanghai University, Shanghai 200444, People’s Republic of China
| | - Yu An
- Department of Chemistry,
Innovative Drug Research Center, and ‡Shanghai Key Laboratory of High
Temperature Superconductors, Shanghai University, Shanghai 200444, People’s Republic of China
| | - Ruolan Jiang
- Department of Chemistry,
Innovative Drug Research Center, and ‡Shanghai Key Laboratory of High
Temperature Superconductors, Shanghai University, Shanghai 200444, People’s Republic of China
| | - Xinglu Zhang
- Department of Chemistry,
Innovative Drug Research Center, and ‡Shanghai Key Laboratory of High
Temperature Superconductors, Shanghai University, Shanghai 200444, People’s Republic of China
| | - Chunju Li
- Department of Chemistry,
Innovative Drug Research Center, and ‡Shanghai Key Laboratory of High
Temperature Superconductors, Shanghai University, Shanghai 200444, People’s Republic of China
| | - Xueshun Jia
- Department of Chemistry,
Innovative Drug Research Center, and ‡Shanghai Key Laboratory of High
Temperature Superconductors, Shanghai University, Shanghai 200444, People’s Republic of China
| | - Jian Li
- Department of Chemistry,
Innovative Drug Research Center, and ‡Shanghai Key Laboratory of High
Temperature Superconductors, Shanghai University, Shanghai 200444, People’s Republic of China
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29
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Zhang WT, Qiang WW, Yao CS, Wang XS. Iodine-catalyzed synthesis of fused tetracyclic pyridazino[6,1-b]pyrrolo[1,2-a]quinazolin-9(1H)-one derivatives via a tandem reaction. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.03.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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30
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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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31
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Saikia AK, Sultana S, Devi NR, Deka MJ, Tiwari K, Dubey VK. Diastereoselective synthesis of substituted hexahydrobenzo[de]isochromanes and evaluation of their antileishmanial activity. Org Biomol Chem 2016; 14:970-9. [PMID: 26625982 DOI: 10.1039/c5ob02038g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Hexahydrobenzo[de]isochromanes and hexahydropyrano[3,4,5-ij]isoquinolines can be efficiently synthesized via Friedel Crafts and oxa Pictet-Spengler reaction of acrylyl enol ethers mediated by triflic acid in good yields. The reaction is highly stereoselective. Two of the hexahydrobenzo[de]isochromanes are found to have moderate antileishmanial activity.
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Affiliation(s)
- Anil K Saikia
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
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32
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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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33
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Cabrero-Antonino JR, Sorribes I, Junge K, Beller M. Selective Ruthenium-Catalyzed Reductive Alkoxylation and Amination of Cyclic Imides. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508575] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Iván Sorribes
- Leibniz-Institut für Katalyse e.V.; Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Kathrin Junge
- Leibniz-Institut für Katalyse e.V.; Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V.; Albert-Einstein-Str. 29a 18059 Rostock Germany
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34
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Cabrero-Antonino JR, Sorribes I, Junge K, Beller M. Selective Ruthenium-Catalyzed Reductive Alkoxylation and Amination of Cyclic Imides. Angew Chem Int Ed Engl 2015; 55:387-91. [DOI: 10.1002/anie.201508575] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Indexed: 11/09/2022]
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35
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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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36
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Wu P, Petersen MÅ, Petersen R, Rasmussen MO, Bonnet K, Nielsen TE, Clausen MH. Synthesis of (Arylamido)pyrrolidinone Libraries through Ritter-Type Cascade Reactions of Dihydroxylactams. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500712] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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37
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Ackrill TD, Sparkes HA, Willis CL. Synthesis of Diarylheptanoid Scaffolds Inspired by Calyxins I and J. Org Lett 2015. [DOI: 10.1021/acs.orglett.5b01848] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Thomas D. Ackrill
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Hazel A. Sparkes
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Christine L. Willis
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
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38
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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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39
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Reddy BVS, Yarlagadda S, Reddy CR, Reddy MR, Sridhar B, Satyanarayana D, Jagadeesh B. Tandem Prins Strategy for the Synthesis of Spiropyrrolidine and Spiropiperidine Derivatives. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500215] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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40
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Ding G, Lu B, Li Y, Wan J, Zhang Z, Xie X. Zinc-Catalyzed Selective Reduction of Cyclic Imides with Hydrosilanes: Synthesis of ω-Hydroxylactams. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201400961] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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41
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42
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Gogoi P, Das VK, Saikia AK. Diastereoselective Synthesis of Substituted Tetrahydrofurans via Prins Cyclization of Enol Ethers. J Org Chem 2014; 79:8592-8. [DOI: 10.1021/jo501197y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Paramartha Gogoi
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Vijay K. 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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43
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Ghosh P, Saha P, Bondalapati S, Indukuri K, Saikia AK. Lewis Acid Mediated Intramolecular C–C Bond Formation of Alkyne-Epoxide Leading to Six-Membered Nitrogen and Oxygen Heterocycles. J Org Chem 2014; 79:4119-24. [DOI: 10.1021/jo402550e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Priya Ghosh
- Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Pipas Saha
- Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Somasekhar Bondalapati
- Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Kiran Indukuri
- 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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44
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Saikia AK, Indukuri K, Das J. Stereoselective synthesis of O-tosyl azabicyclic derivatives via aza Prins reaction of endocyclic N-acyliminium ions: application to the total synthesis of (±)-epi-indolizidine 167B and 209D. Org Biomol Chem 2014; 12:7026-35. [DOI: 10.1039/c4ob01130a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A diastereoselective synthesis of 4-O-tosyl piperidine containing azabicyclic derivatives has been established via Prins cyclization reaction. This protocol has been applied for the total synthesis of (±)-epi-indolizidine 167B and 209D.
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Affiliation(s)
- Anil K. Saikia
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781039, India
| | - Kiran Indukuri
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781039, India
| | - Jagadish Das
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781039, India
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