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Mhasni O, Bouajila J, Rezgui F. Metal catalyst-free N-allylation/alkylation of imidazole and benzimidazole with Morita-Baylis-Hillman (MBH) alcohols and acetates. Beilstein J Org Chem 2023; 19:1251-1258. [PMID: 37674521 PMCID: PMC10477972 DOI: 10.3762/bjoc.19.93] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 08/24/2023] [Indexed: 09/08/2023] Open
Abstract
A highly α-regioselective N-nucleophilic allylic substitution of cyclic MBH alcohols and acetates with imidazole or benzimidazole, in toluene at reflux with an azeotropic distillation, was successfully carried out with no catalysts or additives, affording the corresponding N-substituted imidazole derivatives in good yields. On the other hand, in refluxing toluene or methanol, the aza-Michael addition of imidazole onto acyclic MBH alcohols was performed using DABCO as an additive, leading to the corresponding 1,4-adducts in 70-84% yields.
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Affiliation(s)
- Olfa Mhasni
- Laboratory of Materials, Treatement and Analysis LMTA, LR 15 INRAP 03, National Institute of Research and Physico-Chemical Analysis (INRAP), Biotechpôle Sidi Thabet 2020, Tunisia
| | - Jalloul Bouajila
- Paul Sabatier University, Toulouse 3, Laboratoire de Génie Chimique UMR 5503 Toulouse, France
| | - Farhat Rezgui
- University of Tunis El Manar, Laboratory of Organic Chemistry, Faculty of Sciences, Campus, 2092 Tunis, Tunisia
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2
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Tassone G, Paolino M, Pozzi C, Reale A, Salvini L, Giorgi G, Orlandini M, Galvagni F, Mangani S, Yang X, Carlotti B, Ortica F, Latterini L, Olivucci M, Cappelli A. Xanthopsin-Like Systems via Site-Specific Click-Functionalization of a Retinoic Acid Binding Protein. Chembiochem 2022; 23:e202100449. [PMID: 34647400 PMCID: PMC8934143 DOI: 10.1002/cbic.202100449] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/12/2021] [Indexed: 01/07/2023]
Abstract
The use of light-responsive proteins to control both living or synthetic cells, is at the core of the expanding fields of optogenetics and synthetic biology. It is thus apparent that a richer reaction toolbox for the preparation of such systems is of fundamental importance. Here, we provide a proof-of-principle demonstration that Morita-Baylis-Hillman adducts can be employed to perform a facile site-specific, irreversible and diastereoselective click-functionalization of a lysine residue buried into a lipophilic binding pocket and yielding an unnatural chromophore with an extended π-system. In doing so we effectively open the path to the in vitro preparation of a library of synthetic proteins structurally reminiscent of xanthopsin eubacterial photoreceptors. We argue that such a library, made of variable unnatural chromophores inserted in an easy-to-mutate and crystallize retinoic acid transporter, significantly expand the scope of the recently introduced rhodopsin mimics as both optogenetic and "lab-on-a-molecule" tools.
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Affiliation(s)
- Giusy Tassone
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Marco Paolino
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Cecilia Pozzi
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Annalisa Reale
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Laura Salvini
- Toscana Life Sciences Foundation, Via Fiorentina 1, 53100, Siena, Italy
| | - Gianluca Giorgi
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Maurizio Orlandini
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Federico Galvagni
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Stefano Mangani
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Xuchun Yang
- Chemistry Department, Bowling Green State University, Overman Hall, Bowling Green, OH 43403, USA
| | - Benedetta Carlotti
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Via Elce di Sotto, 8, 06123, Perugia, Italy
| | - Fausto Ortica
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Via Elce di Sotto, 8, 06123, Perugia, Italy
| | - Loredana Latterini
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Via Elce di Sotto, 8, 06123, Perugia, Italy
| | - Massimo Olivucci
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
- Chemistry Department, Bowling Green State University, Overman Hall, Bowling Green, OH 43403, USA
| | - Andrea Cappelli
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
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3
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Omrani A, Rezgui F, Dunach E, Poulain-Martini S. Bi(OTf)3-catalysed regioselective arylation of Morita-Baylis-Hillman type allylic electrophiles. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151758] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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4
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Selective Derivatization of Hexahistidine-Tagged Recombinant Proteins. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019. [PMID: 31347051 DOI: 10.1007/978-3-030-15950-4_13] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2024]
Abstract
Covalent modification of proteins is extensively used in research and industry for biosensing, medical diagnostics, targeted drug delivery, and many other practical applications. The conventional method for production of protein conjugates has changed little in the last 20 years mostly relying on reactions of side chains of cysteine and lysine residues. Due to the presence of large numbers of similar reactive amino acid residues in proteins, common synthetic methods generally produce complex mixtures of products, which are difficult to separate. An emerging alternative technology for covalent modification of proteins involves formation of a covalent bond with a hexahistidine affinity tag present in a majority of recombinant proteins without interfering with other amino acid residues. The approach is based on formation of a ternary complex of the hexahistidine sequence with a bivalent metal cation chelated by ligand bearing an electrophilic Baylis-Hillman ester group capable of subsequent formation of a covalent bond with one of the histidine residues of the tag. The reaction proceeds under mild reaction conditions in neutral aqueous solutions under high dilutions (10-5 to 10-4 M) providing a stable covalent bond between the label and an imidazole residue in a hexahistidine tag at either C- or N-terminus. Because hexahistidine affinity tag methodology is a de-facto standard for preparation of recombinant proteins our approach can be easily implemented for selective derivatization of these proteins with fluorescent groups, alkynyl groups for "click" reactions, or biotinylation.
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Raji Reddy C, Burra AG. [4 + 2]-Annulation of MBH-Acetates of Acetylenic Aldehydes with Imidazoles/Benzimidazoles To Access Imidazo[1,2-a]pyridines/Benzimidazo[1,2-a]pyridines. J Org Chem 2019; 84:9169-9178. [DOI: 10.1021/acs.joc.9b01118] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Chada Raji Reddy
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Amarender Goud Burra
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
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6
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Synthesis and Evaluation of Baylis-Hillman Reaction Derived Imidazole and Triazole Cinnamates as Antifungal Agents. INTERNATIONAL JOURNAL OF MEDICINAL CHEMISTRY 2018; 2018:5758076. [PMID: 30410798 PMCID: PMC6206569 DOI: 10.1155/2018/5758076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 09/15/2018] [Accepted: 09/24/2018] [Indexed: 02/05/2023]
Abstract
Allylic acetates derived from Baylis-Hillman reaction undergo efficient nucleophilic isomerization with imidazoles and triazoles to provide imidazolylmethyl and triazolylmethyl cinnamates stereoselectively. Antifungal evaluation of these derivatives against Cryptococcus neoformans exhibits good minimum inhibitory concentration values. These compounds exhibit low toxicity in proliferating MCF-7 breast cancer cell line. Structure activity relationship studies indicate that halogenated aromatic derivatives provide better antifungal activity.
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7
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On the tandem Morita-Baylis-Hillman/transesterification processes. Mechanistic insights for the role of protic solvents. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.10.039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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8
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Meng D, Qiao Y, Wang X, Wen W, Zhao S. DABCO-catalyzed Knoevenagel condensation of aldehydes with ethyl cyanoacetate using hydroxy ionic liquid as a promoter. RSC Adv 2018; 8:30180-30185. [PMID: 35546849 PMCID: PMC9085423 DOI: 10.1039/c8ra06506c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 08/14/2018] [Indexed: 11/24/2022] Open
Abstract
N-(2-Hydroxy-ethyl)-pyridinium chloride ([HyEtPy]Cl) was synthesized and explored as a novel promoter for 1,4-diazabicyclo [2.2.2] octane (DABCO)-catalyzed Knoevenagel condensation reactions, which showed better catalytic activity compared to other ionic liquid (IL) that had no hydroxyl group attached to the IL scaffold. The effect of hydrogen bond formation between the hydroxyl group of [HyEtPy]Cl and the carbonyl group of aldehyde played an important role in the Knoevenagel condensation reaction. In the [HyEtPy]Cl–H2O–DABCO composite system, Knoevenagel condensation reactions proceeded smoothly and cleanly, and the corresponding Knoevenagel condensation products were obtained in good to excellent yields in all cases examined. This protocol provides a versatile solvent–catalyst system, which has notable advantages such as being eco-friendly, ease of work-up and convenient reuse of the ionic liquid. N-(2-Hydroxy-ethyl)-pyridinium chloride ([HyEtPy]Cl) was synthesized and explored as a novel promoter for 1,4-diazabicyclo [2.2.2] octane (DABCO)-catalyzed Knoevenagel condensation reactions, excellent catalytic activity was obtained.![]()
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Affiliation(s)
- Dan Meng
- School Chemistry and Material Science
- Shanxi Normal University
- Linfen 041001
- China
| | - Yongsheng Qiao
- Department of Chemistry
- Xinzhou Teachers University
- Xinzhou 034000
- China
| | - Xin Wang
- Department of Chemistry
- Xinzhou Teachers University
- Xinzhou 034000
- China
| | - Wei Wen
- Department of Chemistry
- Xinzhou Teachers University
- Xinzhou 034000
- China
| | - Sanhu Zhao
- School Chemistry and Material Science
- Shanxi Normal University
- Linfen 041001
- China
- Department of Chemistry
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9
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Razzano V, Paolino M, Reale A, Giuliani G, Artusi R, Caselli G, Visintin M, Makovec F, Donati A, Villafiorita-Monteleone F, Botta C, Cappelli A. Development of Imidazole-Reactive Molecules Leading to a New Aggregation-Induced Emission Fluorophore Based on the Cinnamic Scaffold. ACS OMEGA 2017; 2:5453-5459. [PMID: 31457813 PMCID: PMC6644839 DOI: 10.1021/acsomega.7b00789] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 08/21/2017] [Indexed: 06/10/2023]
Abstract
In order to obtain new fluorophores potentially useful in imidazole labeling and subsequent conjugation, a small series of Morita-Baylis-Hillman acetates (3a-c) was designed, synthesized, and reacted with imidazole. The optical properties of the corresponding imidazole derivatives 4a-c were analyzed both in solution and in the solid state. Although the solutions display a very weak emission, the powders show a blue emission, particularly enhanced in the case of compound 4c possessing two methoxy groups in the cinnamic scaffold. The photophysical study confirmed the hypothesis that the molecular rigidity of the solid state enhances the emission properties of these compounds by triggering the restriction of intramolecular motions, paving the way for their applications in fluorogenic labeling.
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Affiliation(s)
- Vincenzo Razzano
- Dipartimento
di Biotecnologie, Chimica e Farmacia and European Research Centre
for Drug Discovery and Development, Università
di Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Marco Paolino
- Dipartimento
di Biotecnologie, Chimica e Farmacia and European Research Centre
for Drug Discovery and Development, Università
di Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Annalisa Reale
- Dipartimento
di Biotecnologie, Chimica e Farmacia and European Research Centre
for Drug Discovery and Development, Università
di Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Germano Giuliani
- Dipartimento
di Biotecnologie, Chimica e Farmacia and European Research Centre
for Drug Discovery and Development, Università
di Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Roberto Artusi
- Rottapharm
Biotech S.p.A., Via Valosa
di Sopra 9, 20900 Monza, Italy
| | | | - Michela Visintin
- Rottapharm
Biotech S.p.A., Via Valosa
di Sopra 9, 20900 Monza, Italy
| | - Francesco Makovec
- Rottapharm
Biotech S.p.A., Via Valosa
di Sopra 9, 20900 Monza, Italy
| | - Alessandro Donati
- Dipartimento
di Biotecnologie, Chimica e Farmacia and European Research Centre
for Drug Discovery and Development, Università
di Siena, Via A. Moro 2, 53100 Siena, Italy
| | | | - Chiara Botta
- Istituto
per lo Studio delle Macromolecole (CNR), Via A. Corti 12, 20133 Milano, Italy
| | - Andrea Cappelli
- Dipartimento
di Biotecnologie, Chimica e Farmacia and European Research Centre
for Drug Discovery and Development, Università
di Siena, Via A. Moro 2, 53100 Siena, Italy
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10
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Bharadwaj KC. Acryl Activation by Intramolecular Hydrogen Bond: Morita Baylis Hillman Reaction of Acrylamide with Broad Substrate Scope. ChemistrySelect 2017. [DOI: 10.1002/slct.201701081] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Kishor Chandra Bharadwaj
- Department of Chemistry, Institute of Science; Banaras Hindu Uniaversity; Varanasi India- 221005
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11
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KÖSECELİ ÖZENÇ A, ÇELİK İ, KÖKTEN Ş. Stereoselective and regioselective synthesis of $N$-substituted methyl 2-((azolyl)methyl)-3-arylacrylates from Baylis--Hillman acetates. Turk J Chem 2017. [DOI: 10.3906/kim-1607-35] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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12
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Zhao S, He M, Guo Z, Zhou N, Wang D, Li J, Zhang L. [HyEtPy]Cl–H2O: an efficient and versatile solvent system for the DABCO-catalyzed Morita–Baylis–Hillman reaction. RSC Adv 2015. [DOI: 10.1039/c5ra02102b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A very efficient and versatile solvent system, [HyEtPy]Cl–H2O, has been developed and used in the DABCO-catalyzed Morita–Baylis–Hillman reaction.
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Affiliation(s)
- Sanhu Zhao
- Department of Chemistry
- Xinzhou Teachers University
- Xinzhou 034000
- China
- Institute of Molecular Science
| | - Meiyan He
- Department of Chemistry
- Xinzhou Teachers University
- Xinzhou 034000
- China
| | - Zhaonan Guo
- Department of Chemistry
- Xinzhou Teachers University
- Xinzhou 034000
- China
| | - Na Zhou
- Department of Chemistry
- Xinzhou Teachers University
- Xinzhou 034000
- China
| | - Dou Wang
- Department of Chemistry
- Xinzhou Teachers University
- Xinzhou 034000
- China
| | - Jinlong Li
- Department of Chemistry
- Xinzhou Teachers University
- Xinzhou 034000
- China
| | - Liwei Zhang
- Institute of Molecular Science
- The Key Laboratory of Chemical Biology and Molecular Engineering of Education Ministry
- Shanxi University
- Taiyuan 030006
- China
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13
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Neo AG, López-García L, Marcos CF. Allylic amination of Passerini adducts. Application to the selective synthesis of chromone-substituted α-and γ-amino acid peptidic and retropeptidic units. RSC Adv 2014. [DOI: 10.1039/c4ra05719h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
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14
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Rodrigues MT, Santos MS, Santos H, Coelho F. 1,1′-Carbonyldiimidazole mediates the synthesis of N-substituted imidazole derivatives from Morita–Baylis–Hillman adducts. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2013.10.146] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Liu XX, Melman A. Templated alkylation of hexahistidine with Baylis-Hillman esters. Chem Commun (Camb) 2013; 49:9042-4. [PMID: 23985693 DOI: 10.1039/c3cc43271h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Alkylation of one of the imidazole rings of hexahistidine with Baylis-Hillman esters tethered to nitrilotriacetate residue was achieved in aqueous solutions at neutral pH and at micromolar concentrations in the presence of Ni(2+), Cu(2+), or Zn(2+) cations. The utility of the approach for selective functionalization of His-tagged recombinant proteins was demonstrated by attachment of a fluorescent label to recombinant protein A with an alkynyl group followed by a "click" 1,3-dipolar cycloaddition reaction.
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Affiliation(s)
- Xing Xin Liu
- Clarkson University, Department of Chemistry & Biomolecular Science, Potsdam, New York, USA.
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16
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Saâdi F, Arfaoui A, Amri H. Elegant Synthesis of Highly Functionalized 1,2,3-Trisubstituted Cyclopentanes. SYNTHETIC COMMUN 2013. [DOI: 10.1080/00397911.2011.654371] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Fatma Saâdi
- a Department of Chemistry , Tunis El Manar University, Faculty of Science , Tunis , Tunisia
| | - Aïcha Arfaoui
- a Department of Chemistry , Tunis El Manar University, Faculty of Science , Tunis , Tunisia
| | - Hassen Amri
- a Department of Chemistry , Tunis El Manar University, Faculty of Science , Tunis , Tunisia
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17
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Ghasemi Z, Eshtad M, Mejarshin FP. Synthesis of new N-heteroaryl derivatives of 4-pyrones from kojic acid based Baylis–Hillman acetates. Chem Heterocycl Compd (N Y) 2013. [DOI: 10.1007/s10593-013-1188-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Kim SH, Kim SH, Lee HS, Kim JN. An Efficient Synthesis of Phospha-Morita-Baylis-Hillman Adducts via Michaelis-Arbuzov Reaction of the DABCO Salt of Morita-Baylis-Hillman Bromide. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.1.133] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Kim SH, Kim SH, Lee HJ, Kim JN. One-Pot Synthesis of 5-Hydroxypyrrolin-2-one Derivatives from Modified Morita-Baylis-Hillman Adducts via a Consecutive CuI-Mediated Aerobic Oxidation, Allylic Iodination, Hydration of Nitrile, and Lactamization. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.6.2079] [Citation(s) in RCA: 7] [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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20
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Nayak M, Batra S. Synthesis of Diverse Fused Pyrazoles through Palladium-Mediated Heteroarylation of Heteroarene C-H Bonds. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200401] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Direct one-pot introduction of 2-methylpyridines to Baylis–Hillman adducts via base-mediated 3-aza-Cope rearrangement. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.07.101] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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22
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Basavaiah D, Reddy BS, Badsara SS. Recent contributions from the Baylis-Hillman reaction to organic chemistry. Chem Rev 2010; 110:5447-674. [PMID: 20735052 DOI: 10.1021/cr900291g] [Citation(s) in RCA: 752] [Impact Index Per Article: 50.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Deevi Basavaiah
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India.
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23
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Wang R, Li J, Li C, Liu J, Li D, Jia X, Zhai H. Environmentally Benign Regio- and Stereoselective Synthesis of Functionalized Tertiary Amines. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.201090217] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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24
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Baidya M, Brotzel F, Mayr H. Nucleophilicities and Lewis basicities of imidazoles, benzimidazoles, and benzotriazoles. Org Biomol Chem 2010; 8:1929-35. [PMID: 20449500 DOI: 10.1039/c000965b] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The kinetics of the reactions of some imidazoles, benzimidazoles and benzotriazoles with benzhydrylium ions (diarylcarbenium ions) have been studied photometrically in DMSO, acetonitrile, and aqueous solution at 20 degrees C. The resulting second-order rate constants have been used to determine the nucleophile-specific parameters N and s of these azoles according to the linear-free-energy relationship log k (20 degrees C) = s(N + E). With N = 11.47 (imidazole in acetonitrile), N = 10.50 (benzimidazole in DMSO), and N = 7.69 (benzotriazole in acetonitrile) these azoles are significantly less nucleophilic than previously characterized amines, such as DMAP (N = 14.95 in acetonitrile) and DABCO (N = 18.80 in acetonitrile). For some reactions of the 1-methyl substituted azoles with benzhydrylium ions equilibrium constants have been measured, which render a comparison of the Lewis basicities of these compounds. Substitution of the rate and equilibrium constants of these reactions into the Marcus equation yields the corresponding intrinsic barriers DeltaG(0)( not equal). From the ranking of DeltaG(0)( not equal) (imidazoles > pyridines > 1-azabicyclooctanes) one can derive that the reorganization energies for the reactions of imidazoles with electrophiles are significantly higher than those for the other amines and that imidazoles are less nucleophilic than pyridines and 1-azabicyclooctanes of comparable basicity.
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Affiliation(s)
- Mahiuddin Baidya
- Department Chemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13 (Haus F), 81377 München, Germany
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25
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Baidya M, Remennikov G, Mayer P, Mayr H. SN2’ versus SN2 Reactivity: Control of Regioselectivity in Conversions of Baylis-Hillman Adducts. Chemistry 2010; 16:1365-71. [DOI: 10.1002/chem.200902487] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Zulykama Y, Uma U, Devi PC, Perumal PT. Chemo- and regio-selective functionalization of Morita–Baylis–Hillman bromides with anthranilic acid. CAN J CHEM 2009. [DOI: 10.1139/v09-128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Nucleophilic substitution products of Morita–Baylis–Hillman adducts and their derivatives are valuable synthons. In an attempt to ameliorate the functionality of these functionalized motifs, we report the regio- and chemo-selective functionalization of Morita–Baylis–Hillman bromides with anthranilic acid.
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Affiliation(s)
- Yusuf Zulykama
- Organic Chemistry Division, Central Leather Research Institute, Adyar, Chennai-20, India
| | - Ulagamani Uma
- Organic Chemistry Division, Central Leather Research Institute, Adyar, Chennai-20, India
| | - Palanisamy Chitra Devi
- Organic Chemistry Division, Central Leather Research Institute, Adyar, Chennai-20, India
| | - Paramasivan T. Perumal
- Organic Chemistry Division, Central Leather Research Institute, Adyar, Chennai-20, India
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YE D, LI J, LI C, JIA X. Facile Syntheses ofN-Substituted Imidazoles and Benzotriazoles from Baylis-Hillman Bromides. CHINESE J CHEM 2009. [DOI: 10.1002/cjoc.200990194] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Yadav LDS, Rai VK. The first regio- and diastereoselective direct introduction of α-mercaptoacetic acid/amide units into Morita–Baylis–Hillman acetates. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.03.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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A highly α-regioselective In(OTf)3-catalyzed N-nucleophilic substitution of cyclic Baylis–Hillman adducts with aromatic amines. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.02.048] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Yadav LDS, Patel R, Srivastava VP. An easy access to functionalized allyl dithiocarbamates from Baylis–Hillman adducts in water. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.01.023] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Zhang X, Rao W, Sally, Chan PWH. Iron(III) chloride-catalysed direct nucleophilic α-substitution of Morita-Baylis-Hillman alcohols with alcohols, arenes, 1,3-dicarbonyl compounds, and thiols. Org Biomol Chem 2009; 7:4186-93. [DOI: 10.1039/b908447a] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Li D, Yin K, Li J, Jia X. CuI/iodine-mediated homocoupling reaction of terminal alkynes to 1,3-diynes. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.07.138] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Zhong W, Zhao Y, Guo B, Wu P, Su W. Dramatically Accelerated Addition Under Solvent-Free Conditions: An Efficient Synthesis of (E)-1,2,4-Triazole-Substituted Alkenes from Baylis–Hillman Acetates. SYNTHETIC COMMUN 2008. [DOI: 10.1080/00397910802136623] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Li D, Li J, Jia X. Regio- and Stereoselective Synthesis of α,β-dehydro-β-amino Esters. JOURNAL OF CHEMICAL RESEARCH 2008. [DOI: 10.3184/030823408x338684] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A facile method for the regio- and stereoselective synthesis of α,β-dehydro-β-amino esters from acetates of Baylis-Hillman adducts with amines was reported. In the absence of any solvent and catalyst, the present strategy works well for a series of electron deficient and electron rich aromatic amines as well as aliphatic ones.
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Affiliation(s)
- Dafeng Li
- Department of Chemistry, Shanghai University, Shanghai 200444, P.R. China
| | - Jian Li
- Department of Chemistry, Shanghai University, Shanghai 200444, P.R. China
| | - Xueshun Jia
- Department of Chemistry, Shanghai University, Shanghai 200444, P.R. China
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Jia X, Zhao P, Liu X, Li J. FeCl3‐Catalyzed Nucleophilic Substitution of Baylis–Hillman Adducts with Alcohols. SYNTHETIC COMMUN 2008. [DOI: 10.1080/00397910801929622] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Xueshun Jia
- a Department of Chemistry , Shanghai University , Shanghai, China
| | - Peichao Zhao
- a Department of Chemistry , Shanghai University , Shanghai, China
| | - Xiaotao Liu
- a Department of Chemistry , Shanghai University , Shanghai, China
| | - Jian Li
- a Department of Chemistry , Shanghai University , Shanghai, China
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Li J, Liu X, Zhao P, Jia X. BiCl3-catalysed nucleophilic substitution of Baylis–Hillman adducts with alcohols. JOURNAL OF CHEMICAL RESEARCH 2008. [DOI: 10.3184/030823408x304014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
An efficient nucleophilic substitution of Baylis–Hillman adducts with alcohols catalysed by 10 mol% BiCl3, affords functionalised ethers. Water was the only side product.
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Affiliation(s)
- Jian Li
- Department of Chemistry, Shanghai University, Shanghai 200444, P.R. China
| | - Xiaotao Liu
- Department of Chemistry, Shanghai University, Shanghai 200444, P.R. China
| | - Peichao Zhao
- Department of Chemistry, Shanghai University, Shanghai 200444, P.R. China
| | - Xueshun Jia
- Department of Chemistry, Shanghai University, Shanghai 200444, P.R. China
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Li J, Li S, Jia X, Zhang Y. Syntheses of (Z)-Allyl Chlorides from Baylis–Hillman Adducts with a Trichlorotriazine/DMF System. JOURNAL OF CHEMICAL RESEARCH 2008. [DOI: 10.3184/030823408x287113] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Stereoselective transformation of Baylis–Hillman adducts 1 into corresponding ( Z)-allyl chlorides 2 have been achieved by treatment with 2,4,6-trichloro [1,3,5]triazine and N, N-dimethyl formamide. This novel approach proceeds readily at room temperature within a few hours with excellent yields and stereoselectivity.
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Affiliation(s)
- Jian Li
- Department of Chemistry, Shanghai University, Shanghai, 200444, P. R. China
| | - Shaoyu Li
- Department of Chemistry, Shanghai University, Shanghai, 200444, P. R. China
| | - Xueshun Jia
- Department of Chemistry, Shanghai University, Shanghai, 200444, P. R. China
| | - Yongmin Zhang
- Department of Chemistry, Zhejiang University (Xi-xi Campus), Hangzhou, Zhejiang, 310028, P. R. China
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The CeCl3·7H2O–NaI system as promoter in the synthesis of functionalized trisubstituted alkenes via Knoevenagel condensation. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.07.031] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sreedhar B, Reddy PS, Kumar NS. Cu(I)-catalyzed one-pot synthesis of 1,4-disubstituted 1,2,3-triazoles via nucleophilic displacement and 1,3-dipolar cycloaddition. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.03.007] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Liu YK, Zheng H, Xu DQ, Xu ZY, Zhang YM. Remarkable rate acceleration of SmI3-mediated iodination of acetates of Baylis-Hillman adducts in ionic liquid: facile synthesis of (Z)-allyl iodides. J Zhejiang Univ Sci B 2006; 7:193-7. [PMID: 16502505 PMCID: PMC1419066 DOI: 10.1631/jzus.2006.b0193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Stereoselective transformation of Baylis-Hillman acetates 1 into corresponding (Z)-allyl iodides 2 has been achieved by treatment of 1 with samarium triiodide in THF. Remarkable rate acceleration of samarium triiodide-mediated iodination of 1 was found when ionic liquid 1-n-butyl-3-methyl-imidazolium tetrafluroborate ([bmim]BF(4)) was used as reaction media in stead of THF. This novel approach proceeds readily at 50 degrees C within a few minutes to afford (Z)-allyl iodides 2 in excellent yields. A mechanism involving stereoselective iodination of the acetates of Baylis-Hillman adducts by samarium triiodide is described, in which a six-membered ring transition state played a key role in the stereoselective formation of 2.
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Affiliation(s)
- Yun-Kui Liu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China
| | - Hui Zheng
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China
| | - Dan-Qian Xu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China
| | - Zhen-Yuan Xu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China
- †E-mail:;
| | - Yong-Min Zhang
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China
- †E-mail:;
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