51
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Li Z, Chernyak D, Gevorgyan V. Palladium-catalyzed carbonylative cyclization/arylation cascade for 2-aroylindolizine synthesis. Org Lett 2012. [PMID: 23190118 DOI: 10.1021/ol302947r] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
An efficient synthesis of densely substituted 2-aroylindolizines via the palladium-catalyzed carbonylative cyclization/arylation is reported. This transformation proceeds via the 5-endo-dig cyclization of 2-propargylpyridine triggered by an aroyl Pd complex. It produced diversely substituted 2-aroylindolizines in good to excellent yields.
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Affiliation(s)
- Zhou Li
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, USA
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52
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Lange PP, James K. Rapid access to compound libraries through flow technology: fully automated synthesis of a 3-aminoindolizine library via orthogonal diversification. ACS COMBINATORIAL SCIENCE 2012; 14:570-8. [PMID: 22954105 DOI: 10.1021/co300094n] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A novel methodology for the synthesis of druglike heterocycle libraries has been developed through the use of flow reactor technology. The strategy employs orthogonal modification of a heterocyclic core, which is generated in situ, and was used to construct both a 25-membered library of druglike 3-aminoindolizines, and selected examples of a 100-member virtual library. This general protocol allows a broad range of acylation, alkylation and sulfonamidation reactions to be performed in conjunction with a tandem Sonogashira coupling/cycloisomerization sequence. All three synthetic steps were conducted under full automation in the flow reactor, with no handling or isolation of intermediates, to afford the desired products in good yields. This fully automated, multistep flow approach opens the way to highly efficient generation of druglike heterocyclic systems as part of a lead discovery strategy or within a lead optimization program.
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Affiliation(s)
- Paul P. Lange
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla,
California 92037, United States
| | - Keith James
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla,
California 92037, United States
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53
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Mishra S, Naskar B, Ghosh R. CuCl catalyzed green and efficient one-pot synthesis of aminoindolizine frameworks via three-component reactions of aldehydes, secondary amines, and terminal alkynes in PEG. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.07.113] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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54
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Suresh J, Nagalakshmi RA, Kumar RR, Sivakumar S, Lakshman PLN. 5''-Benzyl-idene-1''-methyl-1'-phenyl-1',2',3',5',6',7',8',8a'-octa-hydro-dispiro[acenaphthyl-ene-1,3'-indolizine-2',3''-piperidine]-2,4''(1H)-dione. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o2981. [PMID: 23125758 PMCID: PMC3470345 DOI: 10.1107/s1600536812039591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2012] [Accepted: 09/18/2012] [Indexed: 11/10/2022]
Abstract
In the title compound, C(37)H(34)N(2)O(2), the pyridinone ring adopts a half-chair conformation. In the octa-hydro-indolizine fused-ring system, the piperidine ring is in a chair conformation and the pyrrole ring is twisted about the N-C(piperidine) bond. The mol-ecular structure features a weak intra-molecular C-H⋯O inter-action.
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Affiliation(s)
- J. Suresh
- Department of Physics, The Madura College, Madurai 625 011, India
| | | | - R. Ranjith Kumar
- Department of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, India
| | - S. Sivakumar
- Department of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, India
| | - P. L. Nilantha Lakshman
- Department of Food Science and Technology, University of Ruhuna, Mapalana, Kamburupitiya 81100, Sri Lanka,Correspondence e-mail:
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55
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Kloubert T, Kretschmer R, Görls H, Westerhausen M. [1-Meth-oxy-3-(pyridin-2-yl)indolizin-2-yl](pyridin-2-yl)methanone. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o2631-2. [PMID: 22969532 PMCID: PMC3435659 DOI: 10.1107/s160053681203396x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Accepted: 07/30/2012] [Indexed: 06/01/2023]
Abstract
Methyl-ation of [1-hy-droxy-3-(pyridin-2-yl)indolizin-2-yl](pyridin-2-yl)methanone was performed via metalation with potassium tert-butano-late in toluene and a subsequent metathesis reaction with methyl iodide yielded the yellow title compound, C(20)H(15)N(3)O(2). The substituents at the indolizine unit are twisted [the indolizine ring system makes dihedral angles of 34.67 (7) and 77.49 (5)°, respectively, with the pyridyl and pyridinoyl rings] with single bonds between the central unit and the attached pyridine ring [1.459 (3) Å] and the pyridinoyl group [1.483 (3) Å]. There are no classical hydrogen bonds in the crystal structure.
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Affiliation(s)
- Tobias Kloubert
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldt-Strasse 8, 07743 Jena, Germany
| | - Robert Kretschmer
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldt-Strasse 8, 07743 Jena, Germany
| | - Helmar Görls
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldt-Strasse 8, 07743 Jena, Germany
| | - Matthias Westerhausen
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldt-Strasse 8, 07743 Jena, Germany
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56
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Lange PP, Bogdan AR, James K. A New Flow Methodology for the Expedient Synthesis of Drug‐Like 3‐Aminoindolizines. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201200316] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Paul P. Lange
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA, Fax: (+1)‐858‐784‐7550; phone: (+1)‐858‐784‐2507
| | - Andrew R. Bogdan
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA, Fax: (+1)‐858‐784‐7550; phone: (+1)‐858‐784‐2507
| | - Keith James
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA, Fax: (+1)‐858‐784‐7550; phone: (+1)‐858‐784‐2507
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57
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58
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Specowius V, Bendrath F, Winterberg M, Ayub K, Langer P. Synthesis of Functionalized Indolizines by Lewis Acid-Mediated Cyclocondensation of 3-(Pyridin-2-yl)-propiolates with Enones. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100795] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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59
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Wu L, Sun J, Yan C. Efficient Synthesis of Pyrrolo[2,1-a]isoquinoline and Pyrrolo[1,2-a]quinoline Derivatives via One-pot Two-step Metal-catalyzed Three-component Reactions. CHINESE J CHEM 2012. [DOI: 10.1002/cjoc.201100238] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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60
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Yang Y, Xie C, Xie Y, Zhang Y. Synthesis of Functionalized Indolizines via Copper-Catalyzed Annulation of 2-Alkylazaarenes with α,β-Unsaturated Carboxylic Acids. Org Lett 2012; 14:957-9. [DOI: 10.1021/ol300067h] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Yuzhu Yang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China, and State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Chunsong Xie
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China, and State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yongju Xie
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China, and State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yuhong Zhang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China, and State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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61
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Mao Z, Li X, Lin X, Lu P, Wang Y. One-pot multicomponent synthesis of polysubstituted indolizines. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.10.083] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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62
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Liu P, Deng CL, Lei X, Lin GQ. Tandem Amination/Cycloisomerization of Aryl Propargylic Alcohols with 2-Aminopyridines as an Expedient Route to Imidazo[1,2-a]pyridines. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101053] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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63
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Lahoz IR, López CS, Navarro-Vázquez A, Cid MM. Experimental and Computational Exploration of Indolizinyl Carbene Generation. A Route to Biindolizines. J Org Chem 2011; 76:3266-73. [DOI: 10.1021/jo200157q] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Inmaculada R Lahoz
- Departamento de Química Orgánica, Universidade de Vigo, Campus Lagoas-Marcosende, 36310 Vigo, Spain
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64
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Hazra A, Mondal S, Maity A, Naskar S, Saha P, Paira R, Sahu KB, Paira P, Ghosh S, Sinha C, Samanta A, Banerjee S, Mondal NB. Amberlite-IRA-402 (OH) ion exchange resin mediated synthesis of indolizines, pyrrolo [1,2-a] quinolines and isoquinolines: antibacterial and antifungal evaluation of the products. Eur J Med Chem 2011; 46:2132-40. [PMID: 21440339 DOI: 10.1016/j.ejmech.2011.02.066] [Citation(s) in RCA: 139] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Revised: 02/22/2011] [Accepted: 02/26/2011] [Indexed: 10/18/2022]
Abstract
A number of indolizines and pyrrolo[1,2-a]quinolines/isoquinolines were prepared from phenacyl pyridinium, quinolinium and isoquinolinium salts derived from the reaction of the heterocycles with 2-bromo acetophenone with alkynes and alkenes using amberlite-IRA-402 (OH) ion exchange resin as the base. Antibacterial and antifungal studies were carried out against thirteen bacterial and four fungal strains, which revealed that three derivatives (4a, 4b, 7a) out of fifteen are effective against all the thirteen strains and one derivative, 10, showed dual antibactericidal and antifungal efficacy.
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Affiliation(s)
- Abhijit Hazra
- Department Of Chemistry, Indian Institute of Chemical Biology, Council of Scientific & Industrial Research, 4, Raja S. C. Mullick Road, Jadavpur, Kolkata-700032, India
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65
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Gogoi S, Dutta M, Gogoi J, Boruah RC. Microwave promoted synthesis of cycl[3.2.2]azines in water via a new three-component reaction. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2010.12.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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66
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Xia Y, Dudnik AS, Li Y, Gevorgyan V. On the validity of Au-vinylidenes in the gold-catalyzed 1,2-migratory cycloisomerization of skipped propargylpyridines. Org Lett 2010; 12:5538-41. [PMID: 21069991 DOI: 10.1021/ol1024794] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A mechanism of the Au-catalyzed cycloisomerization of propargylpyridines has been investigated. Both DFT computational and experimental results strongly support generation of a Au-carbene via a cyclization/proton transfer sequence over the previously proposed path involving a Au-vinylidene intermediate. For the β-Si-substituted Au-carbene (G = SiR(3)), a 1,2-Si migration was shown to be kinetically favored over a 1,2-H shift. This study highlights the importance of alternative pathways that could explain reactivities commonly attributed to an alkyne-vinylidene isomerization in Au catalysis.
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Affiliation(s)
- Yuanzhi Xia
- Key Laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry and Chemical Engineering, Soochow University, Suzhou 215006, China
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67
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Rajakumar P, Satheeshkumar C, Raja S. Synthesis, optical, electrochemical, and thermal studies on triazole-based dendrimers with diphenylamine as surface group. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.07.130] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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68
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Bai Y, Zeng J, Ma J, Gorityala BK, Liu XW. Quick Access to Druglike Heterocycles: Facile Silver-Catalyzed One-Pot Multicomponent Synthesis of Aminoindolizines. ACTA ACUST UNITED AC 2010; 12:696-9. [DOI: 10.1021/cc100086h] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yaguang Bai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Jing Zeng
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Jimei Ma
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Bala Kishan Gorityala
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Xue-Wei Liu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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69
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Liu Y, Zhang Y, Shen YM, Hu HW, Xu JH. Regioselective synthesis of 3-acylindolizines and benzo- analogues via 1,3-dipolar cycloadditions of N-ylides with maleic anhydride. Org Biomol Chem 2010; 8:2449-56. [PMID: 20448905 DOI: 10.1039/c000277a] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
3-Acylindolizines (5a-5f) and their benzo- analogues 1-acylpyrrolo[1,2-a]quinolines (6a-6f) and 1-acylpyrrolo[2,1-a]isoquinolines (7a-7i) are regioselectively synthesized by a convenient one pot reaction of the corresponding pyridinium (quinolinium, isoquinolinium) ylide with maleic anhydride (MA) in the presence of the mild oxidant tetrakispyridinecobalt(ii) dichromate (TPCD). These reactions proceed via a tandem reaction sequence of 1,3-dipolar cycloaddition of azomethine ylide with MA, anhydride hydrolysis and oxidative bisdecarboxylation of the primary cycloadducts followed by dehydrogenative aromatization of the dihydroindolizines. TPCD serves as both decarboxylation and dehydrogenation reagent in the reactions. These results show that TPCD is a promising new reagent for bisdecarboxylation of aliphatic carboxylates.
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Affiliation(s)
- Yun Liu
- Institute of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, PR China
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70
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Zhou C, Zeng R, Zou J. Copper(II) and 2,2′-Biimidazole-promoted Novel Reaction of 4,4,4-Trifluoro-1-phenylbutane-1,3-diones with Iodobenzene Diacetate. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.201090069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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71
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Kim H, Lee K, Kim S, Lee PH. An efficient preparation of indolizines through a tandem palladium-catalyzed cross-coupling reaction and cycloisomerization. Chem Commun (Camb) 2010; 46:6341-3. [DOI: 10.1039/c0cc01945c] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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72
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Shang Y, Zhang M, Yu S, Ju K, Wang C, He X. New route synthesis of indolizines via 1,3-dipolar cycloaddition of pyridiniums and alkynes. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.09.143] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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73
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Lahoz IR, Sicre C, Navarro-Vázquez A, López CS, Cid MM. Mechanistic Investigation on the Formation of Indolizines from 2-Enynylpyridines. Org Lett 2009; 11:4802-5. [DOI: 10.1021/ol901760a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Inma R. Lahoz
- Departamento de Química Orgánica, Facultade de Química, Campus Lagoas-Marcosende, 36310 Vigo, Spain
| | - Cristina Sicre
- Departamento de Química Orgánica, Facultade de Química, Campus Lagoas-Marcosende, 36310 Vigo, Spain
| | - Armando Navarro-Vázquez
- Departamento de Química Orgánica, Facultade de Química, Campus Lagoas-Marcosende, 36310 Vigo, Spain
| | - Carlos Silva López
- Departamento de Química Orgánica, Facultade de Química, Campus Lagoas-Marcosende, 36310 Vigo, Spain
| | - María-Magdalena Cid
- Departamento de Química Orgánica, Facultade de Química, Campus Lagoas-Marcosende, 36310 Vigo, Spain
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74
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Kapur A, Kumar K, Singh L, Singh P, Elango M, Subramanian V, Gupta V, Kanwal P, Ishar MPS. Domino routes to substituted benzoindolizines: tandem reorganization of 1,3-dipolar cycloadducts of nitrones with allenic esters/ketones and alternative cycloaddition–palladium catalyzed cyclization pathway. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.03.076] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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75
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Švorc Ľ, Vrábel V, Marchalín Š, Šafář P, Kožíšek J. (7R,8S,8aS)-8-Hydr-oxy-7-phenyl-perhydro-indolizin-3-one. Acta Crystallogr Sect E Struct Rep Online 2009; 65:o1368-9. [PMID: 21583218 PMCID: PMC2969627 DOI: 10.1107/s1600536809018455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2009] [Accepted: 05/15/2009] [Indexed: 05/30/2023]
Abstract
In the title compound, C(14)H(17)NO(2), the six-membered ring of the indolizine system adopts a chair conformation. In the crystal, mol-ecules form chains parallel to the b axis via inter-molecular O-H⋯O hydrogen bonds. The absolute mol-ecular configuration was assigned from the synthesis.
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Affiliation(s)
- Ľubomír Švorc
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak Technical University, Radlinského 9, SK-81237 Bratislava, Slovak Republic
| | - Viktor Vrábel
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak Technical University, Radlinského 9, SK-81237 Bratislava, Slovak Republic
| | - Štefan Marchalín
- Institute of Organic Chemistry, Catalysis and Petrochemistry, Faculty of Chemical and Food Technology, Slovak Technical University, Radlinského 9, SK-81237 Bratislava, Slovak Republic
| | - Peter Šafář
- Institute of Organic Chemistry, Catalysis and Petrochemistry, Faculty of Chemical and Food Technology, Slovak Technical University, Radlinského 9, SK-81237 Bratislava, Slovak Republic
| | - Jozef Kožíšek
- Institute of Physical Chemistry and Chemical Physics, Faculty of Chemical and Food Technology, Slovak Technical University, Radlinského 9, SK-81237 Bratislava, Slovak Republic
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76
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Shen R, Huang X. Pd-Catalyzed Sequential Reactions via Allene Intermediate for the Synthesis of Polycyclic Frameworks Containing 2,3-Dihydrofuran Units. Org Lett 2008; 10:3283-6. [DOI: 10.1021/ol801139b] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ruwei Shen
- Department of Chemistry, Zhejiang University, Hangzhou 310028, P. R. China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| | - Xian Huang
- Department of Chemistry, Zhejiang University, Hangzhou 310028, P. R. China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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77
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Reaction of nitrilimines with 2-substituted aza-heterocycles. Synthesis of pyrrolo[1,2-a]pyridine and pyrimido[2,1-d]1,2,3,5- tetrazine. Molecules 2008; 13:170-6. [PMID: 18259139 PMCID: PMC6245307 DOI: 10.3390/molecules13010170] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2008] [Revised: 01/22/2008] [Accepted: 01/22/2008] [Indexed: 11/17/2022] Open
Abstract
The reaction of nitrilimine 6a with ethyl pyridine-2-acetate (7) gave the corresponding pyrrolo[1,2-a]pyridine 8, while the reaction of 6b containing an ester moiety afforded the acyclic adduct 9. The reaction of 6a with 2-aminopyrimidine (10) gave the novel unexpected pyrimido[2,1-d]1,2,3,5-tetrazine 11. Acyclic adducts 16 and 17 were obtained from the reaction of 6b with 2-cyanomethylbenzimidazole (14) and 2-aminobenzimidazole (15), respectively.
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78
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Rečnik S, Meden A, Stanovnik B, Svete J. Ring Contractions of 3-Azido-4H-quinolizin-4-ones and 3-Azido-4H-azino[1,2 - x]pyrimidin-4-ones: a Novel Approach to 3-Aminoindolizines and their Aza Analogues. Aust J Chem 2008. [DOI: 10.1071/ch07318] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Thermal transformations of 3-azido-4H-quinolizin-4-ones 4a,b and 3-azido-4H-azino[1,2–x]pyrimidin-4-ones 4c,d, available from the corresponding heteroarylamines 2a–d, were studied. The reaction products were mostly dependent on the solvent. Thus, heating of 3-azido-1-cyano-4H-quinolizin-4-one (4a) in toluene afforded 2-(pyridin-2-yl)fumaronitrile 5a, whereas 3-amino-1-cyano-4H-quinolizin-4-one (8) was obtained on treatment of 4a in a mixture of toluene and trifluoroacetic anhydride. However, heating of 4a in acetic anhydride and in acetic acid resulted in a ring contraction to produce 3-(diacetylamino)indolizine-1-carbonitrile 6a and 3-(acetylamino)indolizine-1-carbonitrile 7a, respectively. Similarly, ring contractions took place on heating ethyl 3-azido-4-oxo-4H-quinolizin-1-carboxylate 4b and 3-azido-4H-azino[1,2–x]pyrimidin-4-ones 4c,d in acetic anhydride or acetic acid to produce the N-acetylated 3-aminoindolizine derivatives 6b, 7b and 3-aminoimidazo[1,2–x]azine derivatives 6c,d in 30–89% yields. The structures of compounds 5–8 were determined by NMR spectroscopy and X-ray diffraction.
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79
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Yan B, Liu Y. Gold-Catalyzed Multicomponent Synthesis of Aminoindolizines from Aldehydes, Amines, and Alkynes under Solvent-Free Conditions or in Water. Org Lett 2007; 9:4323-6. [PMID: 17854200 DOI: 10.1021/ol701886e] [Citation(s) in RCA: 261] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A gold(III)-catalyzed multicomponent coupling/cycloisomerization reaction of heteroaryl aldehydes, amines, and alkynes under solvent-free conditions or in water has been developed. This methodology provides rapid access to substituted aminoindolizines with high atom economy and high catalytic efficiency. Especially, the coupling of enantiomerically enriched amino acid derivatives produces the corresponding N-indolizine-incorporated amino acid derivatives without loss of enantiomeric purity.
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Affiliation(s)
- Bin Yan
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, People's Republic of China
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80
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Yan B, Zhou Y, Zhang H, Chen J, Liu Y. Highly Efficient Synthesis of Functionalized Indolizines and Indolizinones by Copper-Catalyzed Cycloisomerizations of Propargylic Pyridines. J Org Chem 2007; 72:7783-6. [PMID: 17718578 DOI: 10.1021/jo070983j] [Citation(s) in RCA: 118] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The copper-catalyzed cycloisomerizations of 2-pyridyl-substituted propargylic acetates and its derivatives are described, which offer an efficient route to C-1 oxygenated indolizines with a wide range of substituents under mild reaction conditions. The presented method could be readily applied to the synthesis of indolizinones through a cyclization/1,2-migration of tertiary propargylic alcohols.
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Affiliation(s)
- Bin Yan
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, People's Republic of China
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Kobayashi K, Takanohashi A, Himei Y, Sano T, Fukamachi S, Morikawa O, Konishi H. A New Method for the Synthesis of Pyrrolo[1,2-a]quinolines Based on Boron Trifluoride-Mediated Cyclization of 1-(2-Oxiranylphenyl)pyrroles. HETEROCYCLES 2007. [DOI: 10.3987/com-07-11163] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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