51
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Jackl MK, Kreituss I, Bode JW. Synthesis of Tetrahydronaphthyridines from Aldehydes and HARP Reagents via Radical Pictet-Spengler Reactions. Org Lett 2016; 18:1713-5. [PMID: 27026179 DOI: 10.1021/acs.orglett.6b00523] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The combination of aldehydes with newly designed HARP (halogen amine radical protocol) reagents gives access to α-substituted tetrahydronaphthyridines. By using different HARP reagents, various regioisomeric structures can be prepared in a single operation. These products, which are of high value in medicinal chemistry, are formed in a predictable manner via a formal Pictet-Spengler reaction of electron-poor pyridines that would not participate in the corresponding polar reactions.
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Affiliation(s)
- Moritz K Jackl
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH-Zürich , 8093 Zürich, Switzerland
| | - Imants Kreituss
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH-Zürich , 8093 Zürich, Switzerland
| | - Jeffrey W Bode
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH-Zürich , 8093 Zürich, Switzerland
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52
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Combined Imine Reductase and Amine Oxidase Catalyzed Deracemization of Nitrogen Heterocycles. ChemCatChem 2015. [DOI: 10.1002/cctc.201500822] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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53
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Matlock JV, Svejstrup TD, Songara P, Overington S, McGarrigle EM, Aggarwal VK. Synthesis of 6- and 7-Membered N-Heterocycles Using α-Phenylvinylsulfonium Salts. Org Lett 2015; 17:5044-7. [PMID: 26421884 DOI: 10.1021/acs.orglett.5b02516] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A concise synthesis of stereodefined C-substituted morpholines, piperazines, azepines, and oxazepines in moderate to excellent yields (27% to 75%) is reported by reaction of 1,2- or 1,3-amino alcohol/1,2- or 1,3-diamine with an α-phenylvinylsulfonium salt. High levels of regio- and diastereoselectivity (from 2:1 to >20:1) are observed through judicious choice of base (Cs2CO3) and solvent (CH2Cl2). Reactions are performed at ambient temperature and open to air and do not require anhydrous solvent. The deprotection of the N-sulfonamide protecting groups (N-Ts and N-Ns) is also demonstrated. Factors affecting regio- and diastereocontrol are discussed.
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Affiliation(s)
- Johnathan V Matlock
- School of Chemistry, University of Bristol , Cantock's Close, BS8 1TS, Bristol, U.K
| | - Thomas D Svejstrup
- School of Chemistry, University of Bristol , Cantock's Close, BS8 1TS, Bristol, U.K
| | - Pradip Songara
- School of Chemistry, University of Bristol , Cantock's Close, BS8 1TS, Bristol, U.K
| | - Sarah Overington
- School of Chemistry, University of Bristol , Cantock's Close, BS8 1TS, Bristol, U.K
| | - Eoghan M McGarrigle
- Centre for Synthesis and Chemical Biology, UCD School of Chemistry, University College Dublin , Belfield, Dublin 4, Ireland
| | - Varinder K Aggarwal
- School of Chemistry, University of Bristol , Cantock's Close, BS8 1TS, Bristol, U.K
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54
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Luescher MU, Bode JW. Catalytic Synthesis of N-Unprotected Piperazines, Morpholines, and Thiomorpholines from Aldehydes and SnAP Reagents. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505167] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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55
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Luescher MU, Bode JW. Catalytic Synthesis of N-Unprotected Piperazines, Morpholines, and Thiomorpholines from Aldehydes and SnAP Reagents. Angew Chem Int Ed Engl 2015. [PMID: 26212589 DOI: 10.1002/anie.201505167] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Commercially available SnAP (stannyl amine protocol) reagents allow the transformation of aldehydes and ketones into a variety of N-unprotected heterocycles. By identifying new ligands and reaction conditions, a robust catalytic variant that expands the substrate scope to previously inaccessible heteroaromatic substrates and new substitution patterns was realized. It also establishes the basis for a catalytic enantioselective process through the use of chiral ligands.
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Affiliation(s)
- Michael U Luescher
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 3, 8093 Zurich (Switzerland) http://www.bode.ethz.ch
| | - Jeffrey W Bode
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 3, 8093 Zurich (Switzerland) http://www.bode.ethz.ch.
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56
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Geoghegan K, Bode JW. Bespoke SnAP Reagents for the Synthesis of C-Substituted Spirocyclic and Bicyclic Saturated N-Heterocycles. Org Lett 2015; 17:1934-7. [DOI: 10.1021/acs.orglett.5b00618] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kimberly Geoghegan
- Laboratorium für Organische Chemie, Department of Chemistry
and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 3, CH-8093 Zürich, Switzerland
| | - Jeffrey W. Bode
- Laboratorium für Organische Chemie, Department of Chemistry
and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 3, CH-8093 Zürich, Switzerland
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57
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Yoshino T. Synthesis of Saturated N-Heterocycles with SnAP Reagents. J SYN ORG CHEM JPN 2015. [DOI: 10.5059/yukigoseikyokaishi.73.651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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58
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Siau WY, Bode JW. One-Step Synthesis of Saturated Spirocyclic N-Heterocycles with Stannyl Amine Protocol (SnAP) Reagents and Ketones. J Am Chem Soc 2014; 136:17726-9. [DOI: 10.1021/ja511232b] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Woon-Yew Siau
- Laboratorium
für Organische
Chemie, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093 Zürich, Switzerland
| | - Jeffrey W. Bode
- Laboratorium
für Organische
Chemie, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093 Zürich, Switzerland
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59
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Affiliation(s)
- Cam-Van T. Vo
- Laboratorium
für Organische
Chemie, ETH Zürich, Vladimir Prelog Weg 1-5, Zürich, Switzerland 8093
| | - Jeffrey W. Bode
- Laboratorium
für Organische
Chemie, ETH Zürich, Vladimir Prelog Weg 1-5, Zürich, Switzerland 8093
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60
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Vo CVT, Luescher MU, Bode JW. SnAP reagents for the one-step synthesis of medium-ring saturated N-heterocycles from aldehydes. Nat Chem 2014; 6:310-4. [DOI: 10.1038/nchem.1878] [Citation(s) in RCA: 126] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2013] [Accepted: 01/21/2014] [Indexed: 12/28/2022]
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61
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Luescher MU, Vo CVT, Bode JW. SnAP reagents for the synthesis of piperazines and morpholines. Org Lett 2014; 16:1236-9. [PMID: 24502436 DOI: 10.1021/ol500210z] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Substituted piperazines and morpholines are valuable structural motifs in biologically active compounds, but are not easily prepared by contemporary cross-coupling approaches. In this report, we introduce SnAP reagents for the transformation of aldehydes into N-unprotected piperazines and morpholines. This approach offers simple, mild conditions compatible with aromatic, heteroaromatic, aliphatic, and glyoxylic aldehydes and provides mono- and disubstituted N-heterocycles in a single step.
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Affiliation(s)
- Michael U Luescher
- Laboratorium für Organische Chemie, ETH Zürich , CH-8093 Zürich, Switzerland
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62
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Sun X, Song Z, Li H, Sun C. [1,4]‐S‐ to O‐Silyl Migration: Multicomponent Synthesis of α‐Thioketones through Chemoselective Transformation of Esters to Ketones with Organolithium Reagents. Chemistry 2013; 19:17589-94. [PMID: 24243592 DOI: 10.1002/chem.201303459] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Indexed: 02/05/2023]
Affiliation(s)
- Xianwei Sun
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Education Ministry, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu, 610041 (P.R. China)
| | - Zhenlei Song
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Education Ministry, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu, 610041 (P.R. China)
- State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041 (P.R. China)
| | - Hongze Li
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Education Ministry, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu, 610041 (P.R. China)
| | - Changzheng Sun
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Education Ministry, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu, 610041 (P.R. China)
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