51
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Bian YJ, Liu XY, Ji KG, Shu XZ, Guo LN, Liang YM. Efficient synthesis of highly substituted pyrroles based on the tandem reactions: intermolecular amination and Pd(II)-catalyzed intramolecular hydroamidation. Tetrahedron 2009. [DOI: 10.1016/j.tet.2008.12.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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52
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Surmont R, Verniest G, Colpaert F, Macdonald G, Thuring JW, Deroose F, De Kimpe N. New Synthesis of 3-Fluoropyrroles. J Org Chem 2008; 74:1377-80. [PMID: 19115927 DOI: 10.1021/jo802272n] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Riccardo Surmont
- Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium, and Johnson & Johnson Pharmaceutical Research & Development, a Division of Janssen Pharmaceutica NV, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Guido Verniest
- Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium, and Johnson & Johnson Pharmaceutical Research & Development, a Division of Janssen Pharmaceutica NV, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Filip Colpaert
- Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium, and Johnson & Johnson Pharmaceutical Research & Development, a Division of Janssen Pharmaceutica NV, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Gregor Macdonald
- Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium, and Johnson & Johnson Pharmaceutical Research & Development, a Division of Janssen Pharmaceutica NV, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Jan Willem Thuring
- Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium, and Johnson & Johnson Pharmaceutical Research & Development, a Division of Janssen Pharmaceutica NV, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Frederik Deroose
- Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium, and Johnson & Johnson Pharmaceutical Research & Development, a Division of Janssen Pharmaceutica NV, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Norbert De Kimpe
- Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium, and Johnson & Johnson Pharmaceutical Research & Development, a Division of Janssen Pharmaceutica NV, Turnhoutseweg 30, B-2340 Beerse, Belgium
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53
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Krishna PR, Sekhar ER. p-Toluenesulfonylmethyl Isocyanide (TosMIC) and Indium Manifold Strategy to Access β-Keto-(E)-enamino Esters from 1,3-Dicarbonyl Compounds. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800368] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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54
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Shu XZ, Liu XY, Xiao HQ, Ji KG, Guo LN, Liang YM. Tandem Gold(III)-Catalyzed Amination-Intramolecular Hydroamination Reactions of 1-En-4-yn-3-ols with Sulfonamides: Efficient Approach to Highly Substituted Pyrroles. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200700452] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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56
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Jiao L, Hao E, Vicente MGH, Smith KM. Improved Synthesis of Functionalized 2,2‘-Bipyrroles. J Org Chem 2007; 72:8119-22. [PMID: 17887702 DOI: 10.1021/jo701310k] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of 2,2'-bipyrroles has been efficiently synthesized using an improved synthetic approach based on Pd(0)-catalyzed homocoupling of various 2-iodopyrroles. This new synthetic approach takes place at room temperature and in the presence of water. Functional groups such as formyl, ester, and nitrile are able to survive these reaction conditions. Solvents are found to play an important role in this reaction.
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Affiliation(s)
- Lijuan Jiao
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA
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57
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Sagyam RR, Padi PR, Ghanta MR, Vurimidi H. An efficient synthesis of highly substituted pyrrole and bis pyrrole derivatives. J Heterocycl Chem 2007. [DOI: 10.1002/jhet.5570440429] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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58
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Abstract
Imidazole is one of the important heteroaromatic compounds that have found a broad range of uses in, for example, pharmaceutical and industrial applications. Several conventional methodologies for the synthesis of imidazole rings are known; however, they are limited in terms of substrate generality and are not always efficient. Recent studies toward the development of catalytic reactions have brought significant improvements to the preparation of imidazoles. This Focus Review highlights the very recent progress in the catalytic synthesis of imidazoles, particularly those involving the formation of five-membered ring cores.
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Affiliation(s)
- Shin Kamijo
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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59
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Bonne D, Dekhane M, Zhu J. Modulating the Reactivity of α-Isocyanoacetates: Multicomponent Synthesis of 5-Methoxyoxazoles and Furopyrrolones. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200605005] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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60
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Bonne D, Dekhane M, Zhu J. Modulating the Reactivity of α-Isocyanoacetates: Multicomponent Synthesis of 5-Methoxyoxazoles and Furopyrrolones. Angew Chem Int Ed Engl 2007; 46:2485-8. [PMID: 17318939 DOI: 10.1002/anie.200605005] [Citation(s) in RCA: 169] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Damien Bonne
- Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
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61
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Peng L, Zhang X, Ma J, Zhong Z, Wang J. 1,2-Sulfanyl Group Migration as a Driving Force: New Approach to Pyrroles by Reaction of Allenic Aldehydes with Amines. Org Lett 2007; 9:1445-8. [PMID: 17375933 DOI: 10.1021/ol070205d] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] Acid-promoted reaction of sulfanyl group substituted allenic aldehyde with amine affords pyrrole derivatives in high yields. The neighboring group participation of the sulfanyl group is the driving force in this transformation.
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Affiliation(s)
- Lingling Peng
- Beijing National Laboratory of Molecular Sciences (BNLMS), Green Chemistry Center (GCC) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
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62
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Misra NC, Panda K, Ila H, Junjappa H. An Efficient Highly Regioselective Synthesis of 2,3,4-Trisubstituted Pyrroles by Cycloaddition of Polarized Ketene S,S- and N,S-Acetals with Activated Methylene Isocyanides. J Org Chem 2007; 72:1246-51. [PMID: 17253747 DOI: 10.1021/jo062139j] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient route for regioselective synthesis of 2,3,4- substituted pyrroles allowing precise control over the introduction of a number of substituents and functionalities (tosyl, carbalkoxy, aryl, cyano, nitro, acetyl, benzoyl, cyclic amines, etc.) at the three positions of the pyrrole ring has been developed via 1,3-dipolar cycloaddition of readily accessible polarized ketene S,S- and N,S-acetals with carbanions derived from activated methylene isocyanides.
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Affiliation(s)
- N C Misra
- Department of Chemistry, Indian Institute of Technology, Kanpur-208016, India
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63
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Banwell MG, Goodwin TE, Ng S, Smith JA, Wong DJ. Palladium‐Catalysed Cross‐Coupling and Related Reactions Involving Pyrroles. European J Org Chem 2006. [DOI: 10.1002/ejoc.200500911] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Martin G. Banwell
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia, Fax: +61‐2‐6125‐8114
| | - Thomas E. Goodwin
- Department of Chemistry, Hendrix College, 1600 Washington Ave, Conway, AR 72032, USA
| | - Sarah Ng
- School of Chemistry, University of Tasmania, Hobart, TAS 7000, Australia
| | - Jason A. Smith
- School of Chemistry, University of Tasmania, Hobart, TAS 7000, Australia
| | - David J. Wong
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia, Fax: +61‐2‐6125‐8114
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64
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Mattson AE, Bharadwaj AR, Zuhl AM, Scheidt KA. Thiazolium-Catalyzed Additions of Acylsilanes: A General Strategy for Acyl Anion Addition Reactions. J Org Chem 2006; 71:5715-24. [PMID: 16839153 DOI: 10.1021/jo060699c] [Citation(s) in RCA: 128] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A strategy utilizing N-heterocyclic carbenes (NHCs) derived from thiazolium salts has been developed for the generation of carbonyl anions from acylsilanes. Synthetically useful 1,4-diketones and N-phosphinoyl-alpha-aminoketones have been prepared in good to excellent yields via NHC-catalyzed additions of acylsilanes to the corresponding alpha,beta-unsaturated systems and N-phosphinoylimines. These organocatalytic reactions are air- and water-tolerant methods to execute robust carbonyl anion addition reactions. Additionally, polysubstituted aromatic furans and pyrroles have been efficiently synthesized in a one-pot process using this carbonyl anion methodology. The addition of alcohols to the reaction renders the process catalytic in thiazolium salt. In an effort to synthesize a potential intermediate along the proposed reaction pathway, silylated thiazolium carbinols have been identified to provide good yields of carbonyl anion addition products when subjected to the standard reaction conditions in the presence of suitable electrophiles.
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Affiliation(s)
- Anita E Mattson
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA
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65
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Killoran J, Gallagher JF, Murphy PV, O’Shea DF. A study of the effects of subunit pre-orientation for diarylpyrrole esters; design of new aryl-heteroaryl fluorescent sensors. NEW J CHEM 2005. [DOI: 10.1039/b507669b] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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66
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Organoaluminum-mediated selective 1,2-rearrangement of γ,γ-disubstituted γ-amino α,β-unsaturated carbonyl compounds leading to unsymmetrically substituted pyrroles. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.10.126] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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67
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Hansford KA, Zanzarova V, Dörr A, Lubell WD. Three-Step Solution-Phase Combinatorial Access to 1,2-Disubstituted and 1,2,5-Trisubstituted Pyrroles from Carboxylic Esters. ACTA ACUST UNITED AC 2004; 6:893-8. [PMID: 15530115 DOI: 10.1021/cc049904x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient diversity-oriented strategy has been developed for the solution-phase parallel synthesis of di- and trisubstituted pyrrole libraries. Methyl esters 1 were effectively converted to 1,2-di- and 1,2,5-trisubstituted pyrroles 5 and 6 in three steps. Treatment of ester 1 with vinylmagnesium bromide in the presence of copper (I) cyanide yielded the corresponding homoallylic ketone 2, which was subjected to ozonolysis or Tsuji-Wacker oxidation to yield the respective cyclization precursors 3 and 4 after aqueous workup. Compounds 3 and 4 were condensed without further purification with a primary amine to afford the desired 1,2-di- or 1,2,5-trisubstituted pyrroles 5 and 6 in good yield and purity.
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Affiliation(s)
- Karl A Hansford
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre Ville, Montréal, Québec, H3C 3J7, Canada
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68
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Bharadwaj AR, Scheidt KA. Catalytic Multicomponent Synthesis of Highly Substituted Pyrroles Utilizing a One-Pot Sila-Stetter/Paal−Knorr Strategy. Org Lett 2004; 6:2465-8. [PMID: 15228305 DOI: 10.1021/ol049044t] [Citation(s) in RCA: 174] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] A multicomponent synthesis of highly substituted pyrroles catalyzed by thiazolium salts has been disclosed. The reaction employs an acyl anion conjugate addition reaction of acylsilanes (sila-Stetter) and unsaturated ketones to generate 1,4-dicarbonyl compounds in situ. The subsequent addition of various amines promotes a Paal-Knorr reaction, affording the desired pyrrole nucleus in an efficient one-pot process.
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Affiliation(s)
- Ashwin R Bharadwaj
- Northwestern University, Department of Chemistry, 2145 Sheridan Road, Evanston, Illinois 60208, USA
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69
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Zakrzewski J, Hupko J. EFFICIENT SYNTHESIS OF 4-ISOCYANO-2,2,6,6-TETRAMETHYLPIPERIDINE-1-OXYL. ORG PREP PROCED INT 2003. [DOI: 10.1080/00304940309355845] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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70
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Synthesis and characterization of partially β-fluorinated 5,10,15,20-tetraphenylporphyrins and some derivatives. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00677-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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71
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Chapter 5.2 Five membered ring systems: Pyrroles and benzo derivatives. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s0959-6380(02)80008-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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72
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Ferreira VF, de Souza MCBV, Cunha AC, Pereira LOR, Ferreira MLG. RECENT ADVANCES IN THE SYNTHESIS OF PYRROLES. ORG PREP PROCED INT 2001. [DOI: 10.1080/00304940109356613] [Citation(s) in RCA: 149] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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