51
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Tetrahedron reports on organic chemistry. Tetrahedron 2008. [DOI: 10.1016/s0040-4020(08)00897-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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52
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Testero SA, Mata EG. Prospect of Metal-Catalyzed C−C Forming Cross-Coupling Reactions in Modern Solid-Phase Organic Synthesis. ACTA ACUST UNITED AC 2008; 10:487-97. [DOI: 10.1021/cc800020b] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Sebastián A. Testero
- Instituto de Química Rosario, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, CONICET, Suipacha 531, S2002LRK Rosario, Argentina
| | - Ernesto G. Mata
- Instituto de Química Rosario, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, CONICET, Suipacha 531, S2002LRK Rosario, Argentina
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53
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Gauthier MA, Klok HA. Peptide/protein-polymer conjugates: synthetic strategies and design concepts. Chem Commun (Camb) 2008:2591-611. [PMID: 18535687 DOI: 10.1039/b719689j] [Citation(s) in RCA: 378] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This feature article provides a compilation of tools available for preparing well-defined peptide/protein-polymer conjugates, which are defined as hybrid constructs combining (i) a defined number of peptide/protein segments with uniform chain lengths and defined monomer sequences (primary structure) with (ii) a defined number of synthetic polymer chains. The first section describes methods for post-translational, or direct, introduction of chemoselective handles onto natural or synthetic peptides/proteins. Addressed topics include the residue- and/or site-specific modification of peptides/proteins at Arg, Asp, Cys, Gln, Glu, Gly, His, Lys, Met, Phe, Ser, Thr, Trp, Tyr and Val residues and methods for producing peptides/proteins containing non-canonical amino acids by peptide synthesis and protein engineering. In the second section, methods for introducing chemoselective groups onto the side-chain or chain-end of synthetic polymers produced by radical, anionic, cationic, metathesis and ring-opening polymerization are described. The final section discusses convergent and divergent strategies for covalently assembling polymers and peptides/proteins. An overview of the use of chemoselective reactions such as Heck, Sonogashira and Suzuki coupling, Diels-Alder cycloaddition, Click chemistry, Staudinger ligation, Michael's addition, reductive alkylation and oxime/hydrazone chemistry for the convergent synthesis of peptide/protein-polymer conjugates is given. Divergent approaches for preparing peptide/protein-polymer conjugates which are discussed include peptide synthesis from synthetic polymer supports, polymerization from peptide/protein macroinitiators or chain transfer agents and the polymerization of peptide side-chain monomers.
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Affiliation(s)
- Marc A Gauthier
- Ecole Polytechnique Fédérale de Lausanne, Institut des Matériaux, Laboratoire des Polymères, Bâtiment MXD, Station 12, CH-1015, Lausanne, Switzerland
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54
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Le Quement ST, Nielsen TE, Meldal M. Solid-Phase Synthesis of Aryl-Substituted Thienoindolizines: Sequential Pictet−Spengler, Bromination and Suzuki Cross-Coupling Reactions of Thiophenes. ACTA ACUST UNITED AC 2008; 10:447-55. [DOI: 10.1021/cc700199n] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Thomas E. Nielsen
- Carlsberg Laboratory, SPOCC Centre, Gamle Carlsberg Vej 10, DK-2500 Valby, Denmark
| | - Morten Meldal
- Carlsberg Laboratory, SPOCC Centre, Gamle Carlsberg Vej 10, DK-2500 Valby, Denmark
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55
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Non-conventional methodologies for transition-metal catalysed carbon–carbon coupling: a critical overview. Part 2: The Suzuki reaction. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.12.036] [Citation(s) in RCA: 490] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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56
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Bai L, Wang JX. Reusable, Polymer-Supported, Palladium-Catalyzed, Atom- Efficient Coupling Reaction of Aryl Halides with Sodium Tetraphenylborate in Water by Focused Microwave Irradiation. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200700361] [Citation(s) in RCA: 101] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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57
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Doi T, Inoue H, Tokita M, Watanabe J, Takahashi T. Sequential Palladium-Catalyzed Coupling Reactions on Solid-Phase. ACTA ACUST UNITED AC 2008; 10:135-41. [DOI: 10.1021/cc7000925] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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58
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Lamanna G, Menichetti S. 2,3-Disubstituted Benzo[b]thiophenes from Diarylalkynesvia Electrophilic Addition-Cyclization and Palladium-Catalyzed Cross-Coupling. Adv Synth Catal 2007. [DOI: 10.1002/adsc.200700172] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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59
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Tetrahedron reports on organic chemistry. Tetrahedron 2007. [DOI: 10.1016/s0040-4020(07)01371-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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60
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Tetrahedron reports on organic chemistry. Tetrahedron 2007. [DOI: 10.1016/s0040-4020(07)00834-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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61
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Dahan A, Portnoy M. Pd Catalysis on Dendronized Solid Support: Generation Effects and the Influence of the Backbone Structure. J Am Chem Soc 2007; 129:5860-9. [PMID: 17439211 DOI: 10.1021/ja065265d] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Recent studies revealed that catalysts, prepared on dendronized support, frequently exhibit enhanced activity and selectivity as compared to their non-dendronized analogues. Regretfully, in early studies of the supported dendritic catalysis, no particular attention was paid to the coordinative nature of the dendritic backbone. In this study, we functionalized Wang polystyrene support with three types of dendritic templates: poly(aril benzyl ether), poly(aryl benzyl thioether), and poly(aryl benzyl amine). These dendronized resins were further decorated with phosphine ligands on the periphery and complexed with a Pd(0) catalytic precursor. The catalysis of the Heck and Suzuki reactions of bromobenzene with the first to third generation supported dendritic catalysts was examined and compared to that of the non-dendritic analogues. All of the examined reactions revealed a positive dendritic effect, reflected in up to 5-fold increase in yield, in the most prominent case. The reasons for the observed effect are the proximity of the ligating sites translated into reduced cross-linking and, probably, the increased distance of the catalyst from the polymer matrix. We proved, however, that the latter could not be achieved with a linear spacer. Although the Suzuki reaction was rather insensitive to the backbone structure, the Heck reaction catalysis at 80 degrees C exhibited substantial sensitivity to the nature of the dendritic backbone, with the polyether structure demonstrating the best outcome. This is the first demonstration of the influence of the coordinative ability of the backbone on the activity of a supported dendritic catalyst.
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Affiliation(s)
- Adi Dahan
- Contribution from the School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
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62
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63
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Tetrahedron reports on organic chemistry. Tetrahedron 2007. [DOI: 10.1016/s0040-4020(07)00205-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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64
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Nickel-Catalyzed Hydrogenolysis of Arenesulfonates Using Secondary Alkyl Grignard Reagents. B KOREAN CHEM SOC 2007. [DOI: 10.5012/bkcs.2007.28.2.281] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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65
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Chinchilla R, Najera C. The Sonogashira Reaction: A Booming Methodology in Synthetic Organic Chemistry. Chem Rev 2007; 107:874-922. [PMID: 17305399 DOI: 10.1021/cr050992x] [Citation(s) in RCA: 2264] [Impact Index Per Article: 133.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rafael Chinchilla
- Departamento de Química Orgánica and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Facultad de Ciencias, Apartado 99, 03080 Alicante, Spain.
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66
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Charton J, Cousaert N, Bochu C, Willand N, Déprez B, Déprez-Poulain R. A versatile solid-phase synthesis of 3-aryl-1,2,4-oxadiazolones and analogues. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2006.12.050] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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67
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68
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Lectka T, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2006. [DOI: 10.1016/s0040-4020(06)01801-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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69
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Huang X, Wang YG. Solid-Phase Synthesis of Linked Heterocycles from a Selenopolystyrene Resin. ACTA ACUST UNITED AC 2006; 9:121-30. [PMID: 17206840 DOI: 10.1021/cc0600775] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A linked heterocycle library of isoxazoles, 1,2,3-triazoles, bicyclo[2.2.1]hepta-2,5-diene or 4-methylcyclohexa-1,3-diene and 1,2,4-oxadiazoles was prepared by solid-phase organic synthesis. Key steps on resin-bound selenium were electrophilic additions; 1,3-dipolar cycloaddition; Porco's two-step, one-pot condensation of amidoxime and carboxylate; and Diels-Alder reaction.
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Affiliation(s)
- Xian Huang
- Department of Chemistry, Zhejiang University (XixiCampus), Hangzhou 310028, P. R. China.
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70
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Sun LP, Dai WM. An Engineered Linker Capable of Promoting On-Resin Reactions for Microwave-Assisted Solid-Phase Organic Synthesis. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200602523] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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71
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Sun LP, Dai WM. An Engineered Linker Capable of Promoting On-Resin Reactions for Microwave-Assisted Solid-Phase Organic Synthesis. Angew Chem Int Ed Engl 2006; 45:7255-8. [PMID: 17024715 DOI: 10.1002/anie.200602523] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Li-Ping Sun
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P.R. China
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72
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Hanbali M, Bagnard D, Luu B. Solid-phase synthesis of quinol fatty alcohols, design of N/O-substituted quinol fatty alcohols and comparative activities on axonal growth. Bioorg Med Chem Lett 2006; 16:3917-20. [PMID: 16730980 DOI: 10.1016/j.bmcl.2006.05.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2006] [Revised: 05/10/2006] [Accepted: 05/11/2006] [Indexed: 11/17/2022]
Abstract
Following the promising activity of Q2FA15 on axonal growth, two new series of N/O-substituted QFAs were synthesized, based on a SN2-type reaction. O-alkylated QFA bearing 14 carbon atoms on the side chain (n=14) shows a very potent activity on axonal growth though lowered when compared to Q2FA15. While O-alkylation allows good retention of the biological activity, N-alkylation abolishes it nonetheless. A solid-phase-supported synthesis of Q2FA15 allowing the conception of new hybrid compounds is also described.
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Affiliation(s)
- Mazen Hanbali
- Laboratoire de Chimie Organique des Substances Naturelles, LC3-UMR7177 CNRS-ULP, Université Louis Pasteur, 67084 Strasbourg Cedex, France
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73
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Lectka T, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2006. [DOI: 10.1016/s0040-4020(06)00771-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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74
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Abstract
Palladium-catalyzed cross-coupling reactions of aryl perfluorooctanesulfonates with amines are introduced. Application of the fluorous tag in multistep synthesis of triaryl-substituted pyrimidine is also described.
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Affiliation(s)
- Wei Zhang
- Fluorous Technologies, Inc., University of Pittsburgh Applied Research Center 970 William Pitt Way, Pittsburgh, Pennsylvania 15238, USA
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75
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Affiliation(s)
- Peter J. H. Scott
- Department of Chemistry, University at Buffalo, the State University of New York, Buffalo, NY 14260, USA
| | - Patrick G. Steel
- Department of Chemistry, University of Durham, Durham, DH1 3LE, UK
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76
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Knepper K, Vanderheiden S, Bräse S. Nitrogen Functionalities in Palladium-Catalyzed Reactions on Solid Supports: A Case Study. European J Org Chem 2006. [DOI: 10.1002/ejoc.200500779] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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77
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Limbeck M, Wamhoff H, Rölle T, Griebenow N. Palladium-catalyzed α-arylation of ketones on solid support: scope and limitations. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.02.112] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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78
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79
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Kondo Y, Kasahara T. Immobilized Indolylboron as a Key Intermediate for Solid-Phase Synthesis of Bisindole Alkaloid Analogs. HETEROCYCLES 2006. [DOI: 10.3987/com-05-s(t)24] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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80
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Belen’kii L, Gramenitskaya V, Evdokimenkova Y. The Literature of Heterocyclic Chemistry, Part IX, 2002–2004. ADVANCES IN HETEROCYCLIC CHEMISTRY 2006. [DOI: 10.1016/s0065-2725(06)92004-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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81
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Alonso F, Beletskaya IP, Yus M. Non-conventional methodologies for transition-metal catalysed carbon–carbon coupling: a critical overview. Part 1: The Heck reaction. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.08.054] [Citation(s) in RCA: 395] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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82
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Li XL, Xu XM, Tian J, Li YX. Stereoselective Synthesis of NovelC-Disaccharides via Suzuki Cross-Coupling Reaction. CHINESE J CHEM 2005. [DOI: 10.1002/cjoc.200591564] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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83
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Hiroya K, Itoh S, Sakamoto T. Mild and efficient cyclization reaction of 2-ethynylaniline derivatives to indoles in aqueous medium. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.08.098] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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84
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Nielsen TE, Quement SL, Meldal M. Solid-phase synthesis of biarylalanines via Suzuki cross-coupling and intramolecular N-acyliminium Pictet–Spengler reactions. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.09.080] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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85
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86
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Kundu B, Partani P, Duggineni S, Sawant D. Solid-Phase Synthesis of 2-Aminoquinazolinone Derivatives with Two- and Three-Point Diversity. ACTA ACUST UNITED AC 2005; 7:909-15. [PMID: 16283801 DOI: 10.1021/cc0500699] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A versatile solid-phase method for the synthesis of various substituted 2-amino-4(3H)-quinazolinones with two- and three-point diversity is described. The synthesis commenced with the generation of polymer-bound S-methylisothiourea followed by N-acylation with different substituted o-nitrobenzoic acid. Finally, reduction of the nitro group triggered intramolecular cyclization via formation of guanidine to afford 2-amino-4(3H)-quinazolinone and its derivatives in high yields and purities.
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Affiliation(s)
- Bijoy Kundu
- Medicinal Chemistry Division, Central Drug Research Institute, Lucknow, India.
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87
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Cho CH, Park H, Park MA, Ryoo TY, Lee YS, Park K. Solid-Phase Synthesis of Biphenyls and Terphenyls by the Traceless Multifunctional Cleavage of Polymer-Bound Arenesulfonates. European J Org Chem 2005. [DOI: 10.1002/ejoc.200500279] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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88
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Gradén H, Olsson T, Kann N. Carbon−Carbon and Carbon−Heteroatom Bond Formation on Solid Phase Using Cationic Iron Carbonyl Complexes. Org Lett 2005; 7:3565-7. [PMID: 16048343 DOI: 10.1021/ol051353b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Iron-mediated methodology for the formation of carbon-carbon and carbon-heteroatom sp(3) bonds on solid phase has been developed. Treatment of a polymer-bound cationic iron cyclohexadienyl complex with carbon, oxygen, nitrogen, and phosphorus nucleophiles, followed by cleavage with amines and subsequent decomplexation, yielded 18 different cyclohexadienoic acid amides of high purity. [reaction: see text]
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Affiliation(s)
- Henrik Gradén
- Organic Chemistry, Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-41296 Göteborg, Sweden
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89
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Chen CL, Liu YH, Peng SM, Liu ST. Air- and Moisture-Stable Cyclopalladated Complexes as Efficient Catalysts for Suzuki-Miyaura Coupling Reaction. Organometallics 2005. [DOI: 10.1021/om049125t] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chuan-Lin Chen
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
| | - Yi-Hung Liu
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
| | - Shie-Ming Peng
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
| | - Shiuh-Tzung Liu
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
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90
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Okamoto K, Akiyama R, Yoshida H, Yoshida T, Kobayashi S. Formation of Nanoarchitectures Including Subnanometer Palladium Clusters and Their Use as Highly Active Catalysts. J Am Chem Soc 2005; 127:2125-35. [PMID: 15713089 DOI: 10.1021/ja047095f] [Citation(s) in RCA: 197] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Subnanometer Pd clusters stabilized within micelles of random copolymers were formed by direct immobilization of Pd(0) via ligand exchange. The clusters were estimated to contain approximately seven Pd atoms on average (cluster diameter approximately 0.7 nm). Several Pd-containing micelle morphologies could be obtained by polymer cross-linking. These micelles containing Pd clusters were demonstrated to be efficient catalysts for hydrogenations and Heck reactions.
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Affiliation(s)
- Kuniaki Okamoto
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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91
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Kreis M, Nising CF, Schroen M, Knepper K, Bräse S. Efficient solid phase synthesis of benzo[1,2,3]thiadiazoles and related structures. Org Biomol Chem 2005; 3:1835-7. [PMID: 15889164 DOI: 10.1039/b504900h] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first solid-phase synthesis of benzo[1,2,3]thiadiazoles was achieved by starting from resin bound ortho bromo or iodo triazenes and using a functionalization on cleavage.
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Affiliation(s)
- Michael Kreis
- Institut für Organische Chemie, Universität Karlsruhe (TH), Fritz-Haber-Weg 6, D-76131, Karlsruhe, Germany
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92
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Fernàndez JC, Solé-Feu L, Fernández-Forner D, de la Figuera N, Forns P, Albericio F. Suzuki coupling reaction for the solid-phase preparation of 5-substituted nicotinic acid derivatives. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2004.11.153] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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93
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Griesbeck AG, El-Idreesy TT. Solvent-free photooxygenation of 5-methoxyoxazoles in polystyrene nanocontainers doped with tetrastyrylporphyrine and protoporphyrine-IX. Photochem Photobiol Sci 2005; 4:205-9. [PMID: 15696238 DOI: 10.1039/b416159a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A solvent-free route for the photooxygenation of the 5-methoxyoxazoles (1) is described. The substrates were embedded in nanosized polystyrene particles generated by the emulsifier-free emulsion polymerization of styrene with divinylbenzene and porphyrine dyes as cross-polymerizable reagents. From the photooxygenation of , the 1,2,4-dioxazoles (2) were formed and isolated from the reaction cavities by ethanol extraction. From comparison of the substrate conversions, the efficiency of singlet oxygen generation from the porphyrine dyestuff and the stability of the sensitizing material were estimated.
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Affiliation(s)
- Axel G Griesbeck
- Institute of Organic Chemistry, University of Cologne, Greinstr. 4, 50939, Koln, Germany.
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94
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Gök Y, Gürbüz N, Özdemir İ, Çetinkaya B, Çetinkaya E. Benzimidazolin-2-ylidene-palladium-catalysed coupling reactions of aryl halides. Appl Organomet Chem 2005. [DOI: 10.1002/aoc.922] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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95
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96
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Bräse S. The virtue of the multifunctional triazene linkers in the efficient solid-phase synthesis of heterocycle libraries. Acc Chem Res 2004; 37:805-16. [PMID: 15491127 DOI: 10.1021/ar0200145] [Citation(s) in RCA: 129] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
With the implementation of combinatorial chemistry into the modern drug discovery process, the approach to novel diverse heterocycle libraries is an indispensable requirement. Triazenes, which are concealed diazonium salts, can be used to link functionalized arenes and amines to generate various heterocyclic structures, namely, benzoannelated nitrogen heterocycles, upon cleavage from the resin. Since triazene anchors are stable toward various reagents and perform well under a range of reaction conditions, these multifunctional linkers are well suited for automated solid-phase syntheses and the syntheses of complex organic molecules, such as natural products, on solid supports.
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Affiliation(s)
- Stefan Bräse
- Institut für Organische Chemie, Universität Karlsruhe (TH), Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany
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97
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Ruhland T, Svejgaard L, Rasmussen LK, Andersen K. Solid-Phase Synthesis of N-Bi- and N-Terarylpiperazines via Three Different and Consecutive Palladium-Catalyzed Cross-Coupling Reactions. ACTA ACUST UNITED AC 2004; 6:934-41. [PMID: 15530121 DOI: 10.1021/cc0499439] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Novel nonsymmetrical N-bi- and N-terarylpiperazines were synthesized on solid phase via three consecutive palladium-catalyzed cross-coupling reactions in which C-N, C-B, and C-C bonds are formed consecutively.
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Affiliation(s)
- Thomas Ruhland
- Department of Medicinal Chemistry, H. Lundbeck A/S, 9 Ottiliavej, DK-2500 Valby, Denmark.
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98
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Posner PG, Motherwell PW. Tetrahedron reports on organic chemistry. Tetrahedron 2004. [DOI: 10.1016/s0040-4020(04)01396-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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99
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100
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Tetrahedron reports on organic chemistry. Tetrahedron 2004. [DOI: 10.1016/s0040-4020(04)00315-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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