1
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Li P, Tian Y, Tian L, Wang Y. Selective electrochemical acceptorless dehydrogenation reactions of tetrahydroisoquinoline derivatives. Org Biomol Chem 2024; 22:725-730. [PMID: 38169000 DOI: 10.1039/d3ob01930f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Selective dehydrogenation reactions of tetrahydroisoquinoline derivatives through electrochemical oxidation are disclosed. In the presence of nitric acid, the selective partial dehydrogenation of tetrahydroisoquinolines to form 3,4-dihydroisoquinolines was achieved via anodic oxidation. The results of CV (Cyclic Voltammograms) experiments and DFT calculations showed the 3,4-dihydroisoquinolines protonated by an external Brønsted acid to be less prone than their unprotonated counterparts to oxidation under electrochemical conditions, thus avoiding their further dehydrogenation. Moreover, a TEMPO-mediated electrochemical oxidation enabled a complete dehydrogenation to yield fully aromatized isoquinolines. Thus, tunable processes involving electrochemical dehydrogenation of tetrahydroisoquinolines could be used to selectively produce various 3,4-dihydroisoquinolines and isoquinoline derivatives.
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Affiliation(s)
- Pan Li
- Technical Institute of Fluorochemistry (TIF), State Key Laboratory of Materials-Oriented Chemical Engineering (MCE), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Yue Tian
- Technical Institute of Fluorochemistry (TIF), State Key Laboratory of Materials-Oriented Chemical Engineering (MCE), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Lifang Tian
- Technical Institute of Fluorochemistry (TIF), State Key Laboratory of Materials-Oriented Chemical Engineering (MCE), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Yahui Wang
- Technical Institute of Fluorochemistry (TIF), State Key Laboratory of Materials-Oriented Chemical Engineering (MCE), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
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2
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Ji Y, Zhang X, Wu Y, Dang ZL, Han WW, Wang SC, Dong SB, Zhang QZ. Oxidative Cyanation of Tertiary Amines for Facile Synthesis of Tetrahydroisoquinolines with Quaternary Centers. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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3
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Bertolini V, Pallavicini M, Tibhe G, Roda G, Arnoldi S, Monguzzi L, Zoccola M, Di Nardo G, Gilardi G, Bolchi C. Synthesis of α-Hydroxy Fatty Acids from Fatty Acids by Intermediate α-Chlorination with TCCA under Solvent-Free Conditions: A Way to Valorization of Waste Fat Biomasses. ACS OMEGA 2021; 6:31901-31906. [PMID: 34870012 PMCID: PMC8637944 DOI: 10.1021/acsomega.1c04640] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 10/12/2021] [Indexed: 06/13/2023]
Abstract
Within food wastes, including edible and inedible parts, fat biomasses represent a significant portion, often uneconomically used or improperly disposed causing pollution issues. Interesting perspectives for their management and valorization could be opened by conversion of fatty acids (FAs), which are their main constituents, into α-hydroxy FAs (α-HFAs), fine chemicals of great, but largely untapped potential, possibly due to current poor availability. Here, a simple and efficient procedure is reported to α-chlorinate FAs with trichloroisocyanuric acid (TCCA), a green halogenating agent, under solvent-free conditions and to directly convert the resultant α-chloro FAs, without previous purification, into α-HFAs. The procedure was applied to stearic, palmitic, and myristic acid and, with analogous success, to their mixture, ad hoc created to simulate a FAs mixture obtainable from a fat biomass.
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Affiliation(s)
- Valentina Bertolini
- Dipartimento
di Scienze Farmaceutiche, Università
degli Studi di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Marco Pallavicini
- Dipartimento
di Scienze Farmaceutiche, Università
degli Studi di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Gaurao Tibhe
- Dipartimento
di Scienze Farmaceutiche, Università
degli Studi di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Gabriella Roda
- Dipartimento
di Scienze Farmaceutiche, Università
degli Studi di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Sebastiano Arnoldi
- Dipartimento
di Scienze Farmaceutiche, Università
degli Studi di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Laura Monguzzi
- Dipartimento
di Scienze Farmaceutiche, Università
degli Studi di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Marina Zoccola
- Italian
National Research Council, STIIMA, Corso Giuseppe Pella 16, I-13900 Biella, Italy
| | - Giovanna Di Nardo
- Dipartimento
di Scienze della Vita e Biologia dei Sistemi, Università di Torino, via Accademia Albertina 13, I-10113 Torino, Italy
| | - Gianfranco Gilardi
- Dipartimento
di Scienze della Vita e Biologia dei Sistemi, Università di Torino, via Accademia Albertina 13, I-10113 Torino, Italy
| | - Cristiano Bolchi
- Dipartimento
di Scienze Farmaceutiche, Università
degli Studi di Milano, via Mangiagalli 25, I-20133 Milano, Italy
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4
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Modak A, Nett AJ, Swift EC, Haibach MC, Chan VS, Franczyk TS, Shekhar S, Cook SP. Cu-Catalyzed C–N Coupling with Sterically Hindered Partners. ACS Catal 2020; 10:10495-10499. [PMID: 37063689 PMCID: PMC10104551 DOI: 10.1021/acscatal.0c02965] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Copper, an earth-abundant metal, has reemerged as a viable alternative to the versatile Pd-catalyzed C-N coupling. Coupling sterically hindered reaction partners, however, remains challenging. Herein, we disclose the discovery and development of a pyrrole-ol ligand to facilitate the coupling of ortho-substituted aryl iodides with sterically hindered amines. The ligand was discovered through a library screening approach and highlights the value of mining heteroatom-rich pharmaceutical libraries for useful ligand motifs. Further evaluation revealed that this ligand is uniquely effective in these challenging transformations. The reaction enables the coupling of sterically hindered primary and secondary amines, anilines, and amides with broad functional group tolerance.
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Affiliation(s)
- Atanu Modak
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405-7102, United States
| | - Alex J. Nett
- Process Research and Development, AbbVie Inc., 1 North Waukegan Road, North Chicago, Illinois 60064, United States
| | - Elizabeth C. Swift
- Process Research and Development, AbbVie Inc., 1 North Waukegan Road, North Chicago, Illinois 60064, United States
| | - Michael C. Haibach
- Process Research and Development, AbbVie Inc., 1 North Waukegan Road, North Chicago, Illinois 60064, United States
| | - Vincent S. Chan
- Process Research and Development, AbbVie Inc., 1 North Waukegan Road, North Chicago, Illinois 60064, United States
| | - Thaddeus S. Franczyk
- Process Research and Development, AbbVie Inc., 1 North Waukegan Road, North Chicago, Illinois 60064, United States
| | - Shashank Shekhar
- Process Research and Development, AbbVie Inc., 1 North Waukegan Road, North Chicago, Illinois 60064, United States
| | - Silas P. Cook
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405-7102, United States
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5
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Airoldi V, Piccolo O, Roda G, Appiani R, Bavo F, Tassini R, Paganelli S, Arnoldi S, Pallavicini M, Bolchi C. Efficient One-Pot Reductive Aminations of Carbonyl Compounds with Aquivion-Fe as a Recyclable Catalyst and Sodium Borohydride. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901614] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Veronica Airoldi
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; via Mangiagalli 25 20133 Milano Italy
| | | | - Gabriella Roda
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; via Mangiagalli 25 20133 Milano Italy
| | - Rebecca Appiani
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; via Mangiagalli 25 20133 Milano Italy
| | - Francesco Bavo
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; via Mangiagalli 25 20133 Milano Italy
| | - Riccardo Tassini
- Dipartimento di Scienze Molecolari e Nanosistemi; Università Ca' Foscari Venezia; Via Torino 155 30170 Venezia Mestre Italy
| | - Stefano Paganelli
- Dipartimento di Scienze Molecolari e Nanosistemi; Università Ca' Foscari Venezia; Via Torino 155 30170 Venezia Mestre Italy
| | - Sebastiano Arnoldi
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; via Mangiagalli 25 20133 Milano Italy
| | - Marco Pallavicini
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; via Mangiagalli 25 20133 Milano Italy
| | - Cristiano Bolchi
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; via Mangiagalli 25 20133 Milano Italy
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6
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Ji Y, Wang J, Chen M, Shi L, Zhou Y. Dual Stereocontrol for Enantioselective Hydrogenation of Dihydroisoquinolines Induced by Tuning the Amount of N
-Bromosuccinimide. CHINESE J CHEM 2018. [DOI: 10.1002/cjoc.201700634] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Yue Ji
- College of Chemistry, Chemical Engineering and Material Science; Soochow University, 199 Ren'Ai Road; Suzhou Jiangsu 215123 China
| | - Jie Wang
- College of Chemistry, Chemical Engineering and Material Science; Soochow University, 199 Ren'Ai Road; Suzhou Jiangsu 215123 China
| | - Muwang Chen
- College of Chemistry, Chemical Engineering and Material Science; Soochow University, 199 Ren'Ai Road; Suzhou Jiangsu 215123 China
| | - Lei Shi
- College of Chemistry, Chemical Engineering and Material Science; Soochow University, 199 Ren'Ai Road; Suzhou Jiangsu 215123 China
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; Dalian Liaoning 116024 China
| | - Yonggui Zhou
- College of Chemistry, Chemical Engineering and Material Science; Soochow University, 199 Ren'Ai Road; Suzhou Jiangsu 215123 China
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7
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Bolchi C, Bavo F, Pallavicini M. Phase Diagrams to Evaluate the Opportunity for Enantiomeric Enrichment of Some Nonracemic Mixtures of Amino Acid Benzyl Esters by Crystallization as p-Toluenesulfonate Salts. Org Process Res Dev 2017. [DOI: 10.1021/acs.oprd.7b00233] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Cristiano Bolchi
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Mangiagalli 25, I-20133 Milano, Italia
| | - Francesco Bavo
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Mangiagalli 25, I-20133 Milano, Italia
| | - Marco Pallavicini
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Mangiagalli 25, I-20133 Milano, Italia
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8
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Chen MW, Ji Y, Wang J, Chen QA, Shi L, Zhou YG. Asymmetric Hydrogenation of Isoquinolines and Pyridines Using Hydrogen Halide Generated in Situ as Activator. Org Lett 2017; 19:4988-4991. [DOI: 10.1021/acs.orglett.7b02502] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Mu-Wang Chen
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
| | - Yue Ji
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
| | - Jie Wang
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
| | - Qing-An Chen
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
| | - Lei Shi
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
| | - Yong-Gui Zhou
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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9
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Feng GS, Ji Y, Liu HF, Shi L, Zhou YG. Solvent-promoted highly selective dehydrogenation of tetrahydroisoquinolines without catalyst and hydrogen acceptor. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.01.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Perez M, Wu Z, Scalone M, Ayad T, Ratovelomanana-Vidal V. Enantioselective Synthesis of 1-Aryl-Substituted Tetrahydroisoquinolines Through Ru-Catalyzed Asymmetric Transfer Hydrogenation. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500951] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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11
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Ji Y, Shi L, Chen MW, Feng GS, Zhou YG. Concise Redox Deracemization of Secondary and Tertiary Amines with a Tetrahydroisoquinoline Core via a Nonenzymatic Process. J Am Chem Soc 2015; 137:10496-9. [PMID: 26274896 DOI: 10.1021/jacs.5b06659] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A concise deracemization of racemic secondary and tertiary amines with a tetrahydroisoquinoline core has been successfully realized by orchestrating a redox process consisted of N-bromosuccinimide oxidation and iridum-catalyzed asymmetric hydrogenation. This compatible redox combination enables one-pot, single-operation deracemization to generate chiral 1-substituted 1,2,3,4-tetrahydroisoquinolines with up to 98% ee in 93% yield, offering a simple and scalable synthetic technique for chiral amines directly from racemic starting materials.
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Affiliation(s)
- Yue Ji
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, P. R. China
| | - Lei Shi
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, P. R. China.,State Key Laboratory of Fine Chemicals, Dalian University of Technology , Dalian 116024, P. R. China
| | - Mu-Wang Chen
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, P. R. China
| | - Guang-Shou Feng
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, P. R. China
| | - Yong-Gui Zhou
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, P. R. China
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12
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Hussain N, Kim BS, Walsh PJ. Palladium-catalyzed C(sp(3))-H Arylation of N-Boc benzylalkylamines via a deprotonative cross-coupling process. Chemistry 2015; 21:11010-3. [PMID: 26129922 DOI: 10.1002/chem.201502017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Indexed: 12/16/2022]
Abstract
Diarylmethylamines are key intermediates and products in the pharmaceutical industry. Herein we disclose a novel method toward the synthesis of these important compounds via CH functionalization. Presented is a reversible deprotonation of N-Boc benzylalkylamines at the benzylic CH with in situ arylation by a NiXantPhos-based palladium catalyst (50-93 % yield, 29 examples). The method is also successful with N-Boc-tetrahydroisoquinolines. The advantages of this method are it avoids strong bases, low temperatures, and the need to transmetallate to main group metals for the coupling.
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Affiliation(s)
- Nusrah Hussain
- Department of Chemistry, University of Pennsylvania, 231 S, 34th St. Philadelphia, PA 19104 (USA) http://titanium.chem.upenn.edu/walsh/index.html
| | - Byeong-Seon Kim
- Department of Chemistry, University of Pennsylvania, 231 S, 34th St. Philadelphia, PA 19104 (USA) http://titanium.chem.upenn.edu/walsh/index.html
| | - Patrick J Walsh
- Department of Chemistry, University of Pennsylvania, 231 S, 34th St. Philadelphia, PA 19104 (USA) http://titanium.chem.upenn.edu/walsh/index.html.
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13
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Bolchi C, Valoti E, Fumagalli L, Straniero V, Ruggeri P, Pallavicini M. Enantiomerically Pure Dibenzyl Esters of l-Aspartic and l-Glutamic Acid. Org Process Res Dev 2015. [DOI: 10.1021/acs.oprd.5b00134] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cristiano Bolchi
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Mangiagalli 25, I-20133, Milan, Italy
| | - Ermanno Valoti
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Mangiagalli 25, I-20133, Milan, Italy
| | - Laura Fumagalli
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Mangiagalli 25, I-20133, Milan, Italy
| | - Valentina Straniero
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Mangiagalli 25, I-20133, Milan, Italy
| | - Paola Ruggeri
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Mangiagalli 25, I-20133, Milan, Italy
| | - Marco Pallavicini
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Mangiagalli 25, I-20133, Milan, Italy
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14
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Ji Y, Chen MW, Shi L, Zhou YG. Highly selective partial dehydrogenation of tetrahydroisoquinolines using modified Pd/C. CHINESE JOURNAL OF CATALYSIS 2015. [DOI: 10.1016/s1872-2067(14)60243-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Bolchi C, Valoti E, Straniero V, Ruggeri P, Pallavicini M. From 2-aminomethyl-1,4-benzodioxane enantiomers to unichiral 2-cyano- and 2-carbonyl-substituted benzodioxanes via dichloroamine. J Org Chem 2014; 79:6732-7. [PMID: 24945589 DOI: 10.1021/jo500964y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
2-Substituted 1,4-benzodioxanes, such as 2-cyano-, 2-methoxycarbonyl-, 2-aminocarbonyl-, and 2-formyl-1,4-benzodioxane, are key synthons that for the most part are never described as enantiomers or are inadequately characterized for enantiomeric purity. They were prepared by quantitative N,N-dichlorination of (R)- and (S)-2-aminomethyl-1,4-benzodioxane and successive functional group conversions in high yields without any racemization of the stereogenic benzodioxane C(2).
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Affiliation(s)
- Cristiano Bolchi
- Dipartimento di Scienze Farmaceutiche, Sezione "Pietro Pratesi", Università degli Studi di Milano , via Mangiagalli 25, I-20133 Milano, Italia
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16
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Li X, Coldham I. Synthesis of 1,1-Disubstituted Tetrahydroisoquinolines by Lithiation and Substitution, with in Situ IR Spectroscopy and Configurational Stability Studies. J Am Chem Soc 2014; 136:5551-4. [DOI: 10.1021/ja500485f] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Xiabing Li
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, U.K
| | - Iain Coldham
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, U.K
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17
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Jiang J, Ma X, Ji C, Guo Z, Shi T, Liu S, Hu W. Ruthenium(II)/Chiral Brønsted Acid Co-Catalyzed Enantioselective Four-Component Reaction/Cascade Aza-Michael Addition for Efficient Construction of 1,3,4-Tetrasubstituted Tetrahydroisoquinolines. Chemistry 2014; 20:1505-9. [DOI: 10.1002/chem.201304576] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Indexed: 12/24/2022]
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18
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Verzijl GKM, de Vries AHM, de Vries JG, Kapitan P, Dax T, Helms M, Nazir Z, Skranc W, Imboden C, Stichler J, Ward RA, Abele S, Lefort L. Catalytic Asymmetric Reduction of a 3,4-Dihydroisoquinoline for the Large-Scale Production of Almorexant: Hydrogenation or Transfer Hydrogenation? Org Process Res Dev 2013. [DOI: 10.1021/op400268f] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | - Peter Kapitan
- DSM Fine Chemicals Austria, St. Peter Strasse 25, 4021 Linz, Austria
| | - Thomas Dax
- DSM Fine Chemicals Austria, St. Peter Strasse 25, 4021 Linz, Austria
| | - Matthias Helms
- DSM Fine Chemicals Austria, St. Peter Strasse 25, 4021 Linz, Austria
| | - Zarghun Nazir
- DSM Fine Chemicals Austria, St. Peter Strasse 25, 4021 Linz, Austria
| | - Wolfgang Skranc
- DSM Fine Chemicals Austria, St. Peter Strasse 25, 4021 Linz, Austria
| | - Christoph Imboden
- Actelion Pharmaceuticals Ltd., Gewerbestrasse 16, 4123 Allschwil, Switzerland
| | - Juergen Stichler
- Actelion Pharmaceuticals Ltd., Gewerbestrasse 16, 4123 Allschwil, Switzerland
| | - Richard A. Ward
- GlaxoSmithKline, Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, United Kingdom
| | - Stefan Abele
- Actelion Pharmaceuticals Ltd., Gewerbestrasse 16, 4123 Allschwil, Switzerland
| | - Laurent Lefort
- DSM Innovative Synthesis BV, P.O. Box 18, 6160 MD Geleen, The Netherlands
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19
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Xie Y, Sun M, Zhou H, Cao Q, Gao K, Niu C, Yang H. Enantiospecific Total Synthesis of (+)-Tanikolide via a Key [2,3]-Meisenheimer Rearrangement with an Allylic Amine N-Oxide-Directed Epoxidation and a One-Pot Trichloroisocyanuric Acid N-Debenzylation and N-Chlorination. J Org Chem 2013; 78:10251-63. [DOI: 10.1021/jo4016437] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yangla Xie
- School of Pharmaceutical
Science, Zhengzhou University, Zhengzhou 450001, China
| | - Moran Sun
- School of Pharmaceutical
Science, Zhengzhou University, Zhengzhou 450001, China
| | - Hang Zhou
- School of Pharmaceutical
Science, Zhengzhou University, Zhengzhou 450001, China
| | - Qiwei Cao
- School of Pharmaceutical
Science, Zhengzhou University, Zhengzhou 450001, China
| | - Kaige Gao
- School of Pharmaceutical
Science, Zhengzhou University, Zhengzhou 450001, China
| | - Changling Niu
- School of Pharmaceutical
Science, Zhengzhou University, Zhengzhou 450001, China
| | - Hua Yang
- School of Pharmaceutical
Science, Zhengzhou University, Zhengzhou 450001, China
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