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Vadivelu M, Sampath S, Muthu K, Karthikeyan K, Praveen C. Mechanochemistry Enabled Construction of Isoxazole Skeleton
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CuO Nanoparticles Catalyzed Intermolecular Dehydrohalogenative Annulation. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100730] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Murugan Vadivelu
- Department of Chemistry B. S. Abdur Rahman Crescent Institute of Science and Technology Vandalur, Chennai 600048 Tamil Nadu India
| | - Sugirdha Sampath
- Department of Chemistry B. S. Abdur Rahman Crescent Institute of Science and Technology Vandalur, Chennai 600048 Tamil Nadu India
- Department of Metallurgical & Materials Engineering Indian Institute of Technology-Madras (IITM) Chennai 600036 Tamil Nadu India
| | - Kesavan Muthu
- Interdisplinary Institute of Indian System of Medicine (IIISM) SRM Institute of Science and Technology Kattankulathur 603203 Chengalpattu District Tamil Nadu India
| | - Kesavan Karthikeyan
- Department of Chemistry B. S. Abdur Rahman Crescent Institute of Science and Technology Vandalur, Chennai 600048 Tamil Nadu India
| | - Chandrasekar Praveen
- Electrochemical Power Sources Division Central Electrochemical Research Institute (CSIR Laboratory) Alagappapuram, Karaikudi 630003 Sivagangai District Tamil Nadu India
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2
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Sandvoß A, Wiest JM. Recent Advances in Enantioselective Desymmetrizations of Prochiral Oxetanes. Chemistry 2021; 27:5871-5879. [PMID: 33274788 PMCID: PMC8049043 DOI: 10.1002/chem.202004923] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Indexed: 12/23/2022]
Abstract
Strain relief of oxetanes offers a plethora of opportunities for the synthesis of chiral alcohols and ethers. In this context, enantioselective desymmetrization has been identified as a powerful tool to construct molecular complexity and this has led to the development of elegant strategies on the basis of transition metal, Lewis acid, and Brønsted acid catalysis. This review highlights recent examples that harness the inherent reactivity of prochiral oxetanes and offers an outlook on the immense possibilities for synthetic application.
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Affiliation(s)
- Alexander Sandvoß
- Department ChemieJohannes Gutenberg Universität MainzDuesbergweg 10–1455128MainzGermany
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität MünsterCorrensstrasse 3648149MünsterGermany
| | - Johannes M. Wiest
- Department ChemieJohannes Gutenberg Universität MainzDuesbergweg 10–1455128MainzGermany
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität MünsterCorrensstrasse 3648149MünsterGermany
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Huang H, Zhang T, Sun J. Mild C–C Bond Formation via Lewis Acid Catalyzed Oxetane Ring Opening with Soft Carbon Nucleophiles. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202013062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
| | - Tianyu Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
| | - Jianwei Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
- Department of Chemistry The Hong Kong University of Science and Technology, Clear Water Bay Kowloon, Hong Kong SAR China
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Huang H, Zhang T, Sun J. Mild C-C Bond Formation via Lewis Acid Catalyzed Oxetane Ring Opening with Soft Carbon Nucleophiles. Angew Chem Int Ed Engl 2021; 60:2668-2673. [PMID: 33459485 DOI: 10.1002/anie.202013062] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Indexed: 11/09/2022]
Abstract
Mild oxetane opening by soft carbon nucleophiles has been developed for efficient C-C bond formation. In the presence of LiNTf2 or TBSNTf2 as catalyst, silyl ketene acetals were found to be effective nucleophiles to generate a wide range of highly oxygenated molecules, which are key substructure in natural products like polyketides. Furthermore, intramolecular oxetane opening by a styrene-based carbon nucleophile via a Prins-type process was also achieved with Sc(OTf)3 as catalyst, leading to efficient formation of the useful 2,3-dihydrobenzo[b]oxepine skeleton.
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Affiliation(s)
- Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China
| | - Tianyu Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China
| | - Jianwei Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China.,Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
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Wang G, Huang H, Guo W, Qian C, Sun J. Unusual Skeletal Reorganization of Oxetanes for the Synthesis of 1,2-Dihydroquinolines. Angew Chem Int Ed Engl 2020; 59:11245-11249. [PMID: 32219976 DOI: 10.1002/anie.201916727] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 03/08/2020] [Indexed: 01/29/2023]
Abstract
Skeletal reorganization is a type of fascinating transformations owing to their intriguing mechanisms and utility in complex molecule synthesis. However, only a limited amount of examples are known for most functional groups. Herein, we describe such an unusual process of oxetanes. In the presence of In(OTf)3 as catalyst, oxetane-tethered anilines reacted unexpectedly to form 1,2-dihydroquinolines. This process not only provides expedient access to dihydroquinolines, but also represents a new reaction of oxetane. Mechanistically, it is believed that the reaction proceeds through initial nitrogen attack rather than arene attack followed by a series of bond cleavage and formation events. Control experiments provided important insights into the mechanism.
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Affiliation(s)
- Guannan Wang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, China
| | - Wengang Guo
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Chenxiao Qian
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Jianwei Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, China.,Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
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Wang G, Huang H, Guo W, Qian C, Sun J. Unusual Skeletal Reorganization of Oxetanes for the Synthesis of 1,2‐Dihydroquinolines. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Guannan Wang
- Department of Chemistry The Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong SAR China
| | - Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou 213164 China
| | - Wengang Guo
- Department of Chemistry The Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong SAR China
| | - Chenxiao Qian
- Department of Chemistry The Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong SAR China
| | - Jianwei Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou 213164 China
- Department of Chemistry The Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong SAR China
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White AR, Kozlowski RA, Tsai SC, Vanderwal CD. A Direct Synthesis of Highly Substituted π-Rich Aromatic Heterocycles from Oxetanes. Angew Chem Int Ed Engl 2017; 56:10525-10529. [PMID: 28662280 DOI: 10.1002/anie.201704119] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Indexed: 01/20/2023]
Abstract
The ubiquitous use of π-rich five-membered heterocycles has driven the development of new methods for their synthesis for more than a century. Here, we disclose a general and reliable reaction manifold for the construction of highly substituted heterocycles through a facile Lewis-acid-catalyzed oxetane rearrangement. Notably, this methodology employs a keto-oxetane motif as a 1,4-dicarbonyl surrogate, which can be synthesized using robust alkylation or alkenylation reactions, and thus obviates the need to access 1,4-dicarbonyl compounds via umpoled starting materials. We harnessed this reactivity to generate a broad range of substituted furans and pyrroles, and extended this methodology to produce benzo-fused versions thereof.
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Affiliation(s)
- Alexander R White
- Department of Chemistry, University of California, Irvine, CA, 92697-2025, USA
| | - Ryan A Kozlowski
- Department of Chemistry, University of California, Irvine, CA, 92697-2025, USA
| | - Shiou-Chuan Tsai
- Departments of Chemistry and of Molecular Biology & Biochemistry, University of California, Irvine, CA, 92697-2025, USA
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White AR, Kozlowski RA, Tsai S, Vanderwal CD. A Direct Synthesis of Highly Substituted π‐Rich Aromatic Heterocycles from Oxetanes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704119] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Alexander R. White
- Department of Chemistry University of California Irvine CA 92697-2025 USA
| | - Ryan A. Kozlowski
- Department of Chemistry University of California Irvine CA 92697-2025 USA
| | - Shiou‐Chuan Tsai
- Departments of Chemistry and of Molecular Biology & Biochemistry University of California Irvine CA 92697-2025 USA
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9
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Organocatalytic Strategy for the Enantioselective Cycloaddition to Trisubstituted Nitroolefins to Create Spirocyclohexene-Oxetane Scaffolds. Angew Chem Int Ed Engl 2016; 55:2478-82. [DOI: 10.1002/anie.201510731] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 12/09/2015] [Indexed: 11/07/2022]
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10
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Monleón A, Glaus F, Vergura S, Jørgensen KA. Organocatalytic Strategy for the Enantioselective Cycloaddition to Trisubstituted Nitroolefins to Create Spirocyclohexene-Oxetane Scaffolds. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510731] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alicia Monleón
- Department of Chemistry; Aarhus University; Langelandsgade 140 8000 Aarhus C Denmark
| | - Florian Glaus
- Department of Chemistry; Aarhus University; Langelandsgade 140 8000 Aarhus C Denmark
| | - Stefania Vergura
- Department of Chemistry; Aarhus University; Langelandsgade 140 8000 Aarhus C Denmark
| | - Karl Anker Jørgensen
- Department of Chemistry; Aarhus University; Langelandsgade 140 8000 Aarhus C Denmark
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11
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Dighe SU, Mukhopadhyay S, Kolle S, Kanojiya S, Batra S. Synthesis of 3,4,5-Trisubstituted Isoxazoles from Morita-Baylis-Hillman Acetates by an NaNO2 /I2 -Mediated Domino Reaction. Angew Chem Int Ed Engl 2015. [PMID: 26215456 DOI: 10.1002/anie.201504529] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
An efficient NaNO2 /I2 -mediated one-pot transformation of Morita-Baylis-Hillman (MBH) acetates into alkyl 3-nitro-5-(aryl/alkyl)isoxazole-4-carboxylates is described. In a cascade event, initial Michael addition of NaNO2 to the MBH acetate furnishes the allylnitro intermediate which undergoes I2 -catalyzed oxidative α-CH nitration of the nitromethyl subunit followed by [3+2] cycloaddition to afford the title compounds. Structural elaborations of these highly substituted isoxazoles by SN Ar reactions and hydrogenolysis allows access to useful products.
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Affiliation(s)
- Shashikant U Dighe
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031 (India)
| | - Sushobhan Mukhopadhyay
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031 (India)
| | - Shivalinga Kolle
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031 (India)
| | - Sanjeev Kanojiya
- Sophisticated Analytical Instrumentation Facility, CSIR, Central Drug Research Institute (India).,Academy of Scientific and Innovative Research, New Delhi (India)
| | - Sanjay Batra
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031 (India). , .,Academy of Scientific and Innovative Research, New Delhi (India). ,
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12
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Hu F, Szostak M. Recent Developments in the Synthesis and Reactivity of Isoxazoles: Metal Catalysis and Beyond. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500319] [Citation(s) in RCA: 220] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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13
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Dighe SU, Mukhopadhyay S, Kolle S, Kanojiya S, Batra S. Synthesis of 3,4,5-Trisubstituted Isoxazoles from Morita-Baylis-Hillman Acetates by an NaNO2/I2-Mediated Domino Reaction. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504529] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Porta R, Coccia F, Annunziata R, Puglisi A. Comparison of Different Polymer- and Silica-Supported 9-Amino-9-deoxy-epi-quinines as Recyclable Organocatalysts. ChemCatChem 2015. [DOI: 10.1002/cctc.201500106] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Davis OA, Bull JA. Synthesis of di-, tri-, and tetrasubstituted oxetanes by rhodium-catalyzed O-H insertion and C-C bond-forming cyclization. Angew Chem Int Ed Engl 2014; 53:14230-4. [PMID: 25313894 PMCID: PMC4502968 DOI: 10.1002/anie.201408928] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Indexed: 11/08/2022]
Abstract
Oxetanes offer exciting potential as structural motifs and intermediates in drug discovery and materials science. Here an efficient strategy for the synthesis of oxetane rings incorporating pendant functional groups is described. A wide variety of oxetane 2,2-dicarboxylates were accessed in high yields, including functionalized 3-/4-aryl- and alkyl-substituted oxetanes and fused oxetane bicycles. Enantioenriched alcohols provided enantioenriched oxetanes with complete retention of configuration. The oxetane products were further derivatized, while the ring was maintained intact, thus highlighting their potential as building blocks for medicinal chemistry.
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Affiliation(s)
- Owen A Davis
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ (UK) http://www3.imperial.ac.uk/people/j.bull
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Davis OA, Bull JA. Synthesis of Di-, Tri-, and Tetrasubstituted Oxetanes by Rhodium-Catalyzed OH Insertion and CC Bond-Forming Cyclization. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408928] [Citation(s) in RCA: 17] [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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17
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Phelan JP, Patel EJ, Ellman JA. Catalytic Enantioselective Addition of Thioacids to Trisubstituted Nitroalkenes. Angew Chem Int Ed Engl 2014; 53:11329-32. [DOI: 10.1002/anie.201406971] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Indexed: 11/07/2022]
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Phelan JP, Patel EJ, Ellman JA. Catalytic Enantioselective Addition of Thioacids to Trisubstituted Nitroalkenes. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406971] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Gangadhara Chary R, Rajeshwar Reddy G, Ganesh YSS, Vara Prasad K, Raghunadh A, Krishna T, Mukherjee S, Pal M. Effect of Aqueous Polyethylene Glycol on 1,3-Dipolar Cycloaddition of Benzoylnitromethane/Ethyl 2-Nitroacetate with Dipolarophiles: Green Synthesis of Isoxazoles and Isoxazolines. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300712] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ruider SA, Müller S, Carreira EM. Ring expansion of 3-oxetanone-derived spirocycles: facile synthesis of saturated nitrogen heterocycles. Angew Chem Int Ed Engl 2013; 52:11908-11. [PMID: 24115402 DOI: 10.1002/anie.201306563] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2013] [Indexed: 11/06/2022]
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Ruider SA, Müller S, Carreira EM. Ringerweiterung von Oxetan-3-on-abgeleiteten Spirocyclen: ein praktischer Zugang zu gesättigten Stickstoffheterocyclen. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306563] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kung KKY, Lo VKY, Ko HM, Li GL, Chan PY, Leung KC, Zhou Z, Wang MZ, Che CM, Wong MK. Cyclometallated Gold(III) Complexes as Effective Catalysts for Synthesis of Propargylic Amines, Chiral Allenes and Isoxazoles. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300005] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Orr D, Tolfrey A, Percy JM, Frieman J, Harrison ZA, Campbell-Crawford M, Patel VK. Single-Step Microwave-Mediated Synthesis of Oxazoles and Thiazoles from 3-Oxetanone: A Synthetic and Computational Study. Chemistry 2013; 19:9655-62. [DOI: 10.1002/chem.201301011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2013] [Indexed: 11/07/2022]
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Samai S, Chanda T, Ila H, Singh MS. One-Pot Three-Component Heteroannulation of β-Oxo Dithioesters, Amines and Hydroxylamine: Regioselective, Facile and Straightforward Entry to 5-Substituted 3-Aminoisoxazoles. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300038] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Zhao W, Wang Z, Sun J. Synthesis of eight-membered lactones: intermolecular [6+2] cyclization of amphoteric molecules with siloxy alkynes. Angew Chem Int Ed Engl 2012; 51:6209-13. [PMID: 22588830 DOI: 10.1002/anie.201200513] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 04/02/2012] [Indexed: 01/26/2023]
Affiliation(s)
- Wanxiang Zhao
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
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Zhao W, Wang Z, Sun J. Synthesis of Eight-Membered Lactones: Intermolecular [6+2] Cyclization of Amphoteric Molecules with Siloxy Alkynes. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201200513] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Heasley B. Isoxazole Functionalization Technologies Enable Construction of Tetracycline Derivatives. Angew Chem Int Ed Engl 2011; 50:8474-7. [DOI: 10.1002/anie.201102480] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2011] [Indexed: 11/11/2022]
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