1
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Shi Y, Xiong LT, Li H, Li WL, O'Neill Rothenberg D, Liao LS, Deng X, Song GP, Cui ZN. Derivative of cinnamic acid inhibits T3SS of Xanthomonas oryzae pv. oryzae through the HrpG-HrpX regulatory cascade. Bioorg Chem 2023; 141:106871. [PMID: 37734193 DOI: 10.1016/j.bioorg.2023.106871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 09/14/2023] [Accepted: 09/16/2023] [Indexed: 09/23/2023]
Abstract
Bacterial leaf blight (BLB) caused by Xanthomonas oryzae pv. oryzae (Xoo) has a significant impact on rice yield and quality worldwide. Traditionally, bactericide application has been commonly used to control this devastating disease. However, the overuse of fungicides has led to a number of problems such as the development of resistance and environmental pollution. Therefore, the development of new methods and approaches for disease control are still urgent. In this paper, a series of cinnamic acid derivatives were designed and synthesized, and three novel T3SS inhibitors A10, A12 and A20 were discovered. Novel T3SS inhibitors A10, A12 and A20 significantly inhibited the hpa1 promoter activity without affecting Xoo growth. Further studies revealed that the title compounds A10, A12 and A20 significantly impaired hypersensitivity in non-host plant tobacco leaves, while applications on rice significantly reduced symptoms of bacterial leaf blight. RT-PCR showed that compound A20 inhibited the expression of T3SS-related genes. In summary, this work exemplifies the potential of the title compound as an inhibitor of T3SS and its efficacy in the control of bacterial leaf blight.
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Affiliation(s)
- Yu Shi
- National Key Laboratory of Green Pesticide, Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China; Henry Fok School of Biology and Agriculture, Shaoguan University, Shaoguan 512005, China
| | - Lan-Tu Xiong
- National Key Laboratory of Green Pesticide, Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Hui Li
- College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Wen-Long Li
- National Key Laboratory of Green Pesticide, Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | | | - Li-Sheng Liao
- National Key Laboratory of Green Pesticide, Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Xin Deng
- Department of Biomedical Sciences, City University of Hong Kong, Kowloon Tong, Hong Kong SAR 999077, China; Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518057, China
| | - Gao-Peng Song
- College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China.
| | - Zi-Ning Cui
- National Key Laboratory of Green Pesticide, Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China.
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2
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De Sarlo F, Machetti F. Primary nitro compounds: progress in the synthesis of isoxazoles by condensation with aldehydes or activated ketones. Org Biomol Chem 2023; 21:7255-7266. [PMID: 37646329 DOI: 10.1039/d3ob00960b] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Among the known strategies directed towards the synthesis of isoxazole derivatives, the reactions of aldehydes with primary nitro compounds deserve a comprehensive treatment, including the historical development as well as the more recent applications. The reactions of aldehydes with primary nitro compounds in a 1 : 2 molar ratio have been shown to lead to isoxazoline-N-oxides or isoxazole derivatives, via β-dinitro derivatives. Several modifications of the process allowed the formation of products bearing substituents at various positions of the heterocyclic ring with control of regioselectivity. Ketones are reported to react with primary nitro compounds, only if activated (β-diketones, α-nitroketones, or strained ketones), to give isoxazole derivatives. Symmetric 2,4-dinitroglutarates formed from aromatic aldehydes and nitroacetate undergo ring closure to form isoxazole derivatives or, according to reaction conditions, 5-hydroxy-6-oxo-4-aryl-6H-1,2-oxazine-3-carboxylates ("oxazinones"), by loss of alcohol instead of water. Isoxazole-4-carbaldehydes are obtained by the reaction of 3-oxetanone with primary nitro compounds.
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Affiliation(s)
- Francesco De Sarlo
- Dipartimento di Chimica "Ugo Schiff" dell' Università degli Studi di Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino, Firenze, Italy
| | - Fabrizio Machetti
- Istituto di Chimica dei Composti Organometallici del Consiglio Nazionale delle Ricerche c/o Dipartimento di Chimica "Ugo Schiff" dell' Università degli Studi di Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino, Firenze, Italy.
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3
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Dong T, Wei P, Li M, Gao F, Qin Y. Highly Diastereoselective Synthesis of Tetrahydroquinoline Derivatives via [4 + 2] Annulation of Ortho-Tosylaminophenyl-Substituted Para-Quinone Methides and Cyanoalkenes. Front Chem 2021; 9:764866. [PMID: 34805095 PMCID: PMC8595915 DOI: 10.3389/fchem.2021.764866] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 10/19/2021] [Indexed: 11/13/2022] Open
Abstract
As a privileged structural motif, tetrahydroquinoline skeletons widely exist in biologically active natural products and pharmaceuticals. In this protocol, a highly diastereoselective [4 + 2] annulation of ortho-tosylaminophenyl-substituted p-QMs and cyanoalkenes to construct tetrahydroquinoline derivatives has been successfully achieved. This strategy proceeds efficiently under mild condition, offering straightforward route to a variety of 4-aryl-substituted tetrahydroquinolines with high yields, excellent diastereoselectivities, broad functional group tolerance as well as gram-scale capacity. Moreover, a one-pot reaction sequence utilizing in situ generated p-QMs under the similar condition to build tetrahydroquinoline framework is smoothly conducted with good reaction performance as well as step and atom economy.
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Affiliation(s)
- Taiwei Dong
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Peifeng Wei
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Min Li
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Feng Gao
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Yuan Qin
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Clinical Research Center for Oral Diseases, Department of Orthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an, China
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4
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Corsi M, Magnolfi S, Machetti F. Transesterification of Methyl 2-Nitroacetate to Superior Esters. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Massimo Corsi
- Dipartimento di Chimica “Ugo Schiff” dell' Università degli Studi di Firenze; via Della Lastruccia 13 50019 Sesto Fiorentino Firenze Italy
| | - Stefano Magnolfi
- Istituto di Chimica dei Composti Organometallici (ICCOM) del Consiglio Nazionale delle Ricerche (CNR); c/o Dipartimento di Chimica “Ugo Schiff” dell' Università degli Studi di Firenze; via Della Lastruccia 13 50019 Sesto Fiorentino Firenze Italy
| | - Fabrizio Machetti
- Istituto di Chimica dei Composti Organometallici (ICCOM) del Consiglio Nazionale delle Ricerche (CNR); c/o Dipartimento di Chimica “Ugo Schiff” dell' Università degli Studi di Firenze; via Della Lastruccia 13 50019 Sesto Fiorentino Firenze Italy
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5
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Chaudhari P, Hong BC, Wen CL, Lee GH. Asymmetric Synthesis of Spirocyclopentane Oxindoles Containing Four Consecutive Stereocenters and Quaternary α-Nitro Esters via Organocatalytic Enantioselective Michael-Michael Cascade Reactions. ACS OMEGA 2019; 4:655-667. [PMID: 31459355 PMCID: PMC6648780 DOI: 10.1021/acsomega.8b03049] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 12/24/2018] [Indexed: 06/10/2023]
Abstract
An enantioselective domino Michael-Michael reaction of nitroolefins and 2-nitro-3-arylacrylates has been established, which provided a series of spirocyclopentane oxindoles with four consecutive stereocenters including quaternary α-nitro esters with good yields (up to 73%) and excellent enantioselectivities (up to 97% ee). The reaction was realized and optimized with the aid of a chiral squaramide-amine catalyst. The structures of 11 products were confirmed by single-crystal X-ray diffraction analysis.
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Affiliation(s)
- Prakash
D. Chaudhari
- Department
of Chemistry and Biochemistry, National
Chung Cheng University, Chia-Yi 621, Taiwan, ROC
| | - Bor-Cherng Hong
- Department
of Chemistry and Biochemistry, National
Chung Cheng University, Chia-Yi 621, Taiwan, ROC
| | - Chao-Lin Wen
- Department
of Chemistry and Biochemistry, National
Chung Cheng University, Chia-Yi 621, Taiwan, ROC
| | - Gene-Hsiang Lee
- Instrumentation
Center, National Taiwan University, Taipei 106, Taiwan, ROC
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6
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Gagnot G, Hervin V, Coutant EP, Desmons S, Baatallah R, Monnot V, Janin YL. Synthesis of unnatural α-amino esters using ethyl nitroacetate and condensation or cycloaddition reactions. Beilstein J Org Chem 2018; 14:2846-2852. [PMID: 30498535 PMCID: PMC6244114 DOI: 10.3762/bjoc.14.263] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 10/26/2018] [Indexed: 11/23/2022] Open
Abstract
We report here on the use of ethyl nitroacetate as a glycine template to produce α-amino esters. This started with a study of its condensation with various arylacetals to give ethyl 3-aryl-2-nitroacrylates followed by a reduction (NaBH4 and then zinc/HCl) into α-amino esters. The scope of this method was explored as well as an alternative with arylacylals instead. We also focused on various [2 + 3] cycloadditions, one leading to a spiroacetal, which led to the undesired ethyl 5-(benzamidomethyl)isoxazole-3-carboxylate. The addition of ethyl nitroacetate on a 5-methylene-4,5-dihydrooxazole using cerium(IV) ammonium nitrate was also explored and the synthesis of other oxazole-bearing α-amino esters was achieved using gold(I) chemistry.
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Affiliation(s)
- Glwadys Gagnot
- Unité de Chimie et Biocatalyse, Département de Biologie Structurale et Chimie, Institut Pasteur, 28 rue du Dr. Roux, 75724 Paris Cedex 15, France.,Unité Mixte de Recherche 3523, Centre National de la Recherche Scientifique, 28 rue du Dr. Roux, 75724 Paris Cedex 15, France.,Université Paris Descartes, Sorbonne Paris Cité, 12 rue de l'École de Médecine, 75006 Paris, France
| | - Vincent Hervin
- Unité de Chimie et Biocatalyse, Département de Biologie Structurale et Chimie, Institut Pasteur, 28 rue du Dr. Roux, 75724 Paris Cedex 15, France.,Unité Mixte de Recherche 3523, Centre National de la Recherche Scientifique, 28 rue du Dr. Roux, 75724 Paris Cedex 15, France
| | - Eloi P Coutant
- Unité de Chimie et Biocatalyse, Département de Biologie Structurale et Chimie, Institut Pasteur, 28 rue du Dr. Roux, 75724 Paris Cedex 15, France.,Unité Mixte de Recherche 3523, Centre National de la Recherche Scientifique, 28 rue du Dr. Roux, 75724 Paris Cedex 15, France
| | - Sarah Desmons
- Unité de Chimie et Biocatalyse, Département de Biologie Structurale et Chimie, Institut Pasteur, 28 rue du Dr. Roux, 75724 Paris Cedex 15, France.,Unité Mixte de Recherche 3523, Centre National de la Recherche Scientifique, 28 rue du Dr. Roux, 75724 Paris Cedex 15, France
| | - Racha Baatallah
- Unité de Chimie et Biocatalyse, Département de Biologie Structurale et Chimie, Institut Pasteur, 28 rue du Dr. Roux, 75724 Paris Cedex 15, France.,Unité Mixte de Recherche 3523, Centre National de la Recherche Scientifique, 28 rue du Dr. Roux, 75724 Paris Cedex 15, France
| | - Victor Monnot
- Unité de Chimie et Biocatalyse, Département de Biologie Structurale et Chimie, Institut Pasteur, 28 rue du Dr. Roux, 75724 Paris Cedex 15, France.,Unité Mixte de Recherche 3523, Centre National de la Recherche Scientifique, 28 rue du Dr. Roux, 75724 Paris Cedex 15, France
| | - Yves L Janin
- Unité de Chimie et Biocatalyse, Département de Biologie Structurale et Chimie, Institut Pasteur, 28 rue du Dr. Roux, 75724 Paris Cedex 15, France.,Unité Mixte de Recherche 3523, Centre National de la Recherche Scientifique, 28 rue du Dr. Roux, 75724 Paris Cedex 15, France
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7
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Kącka A, Jasiński R. Triethylsulfonium and triethylphosphonium cations as novel catalysts for the decomposition process of nitroethyl benzoates. PHOSPHORUS SULFUR 2017. [DOI: 10.1080/10426507.2017.1290626] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Agnieszka Kącka
- Institute of Organic Chemistry and Technology, Cracow University of Technology, Cracow, Poland
| | - Radomir Jasiński
- Institute of Organic Chemistry and Technology, Cracow University of Technology, Cracow, Poland
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8
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Pelagalli A, Pellacani L, Fioravanti S. In Pursuit of β-Amino-α-nitro-β-(trifluoromethyl) Ketones: Nitro-Mannich versus Mannich-Type Reactions. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700510] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Alessia Pelagalli
- Dipartimento di Chimica; Università degli Studi di Roma “La Sapienza”; P.le Aldo Moro 5 00185 Roma Italy
| | - Lucio Pellacani
- Dipartimento di Chimica; Università degli Studi di Roma “La Sapienza”; P.le Aldo Moro 5 00185 Roma Italy
| | - Stefania Fioravanti
- Dipartimento di Chimica; Università degli Studi di Roma “La Sapienza”; P.le Aldo Moro 5 00185 Roma Italy
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9
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Fedorovskii OY, Volkonskii AY, Golubev AS, Spiridonov YY, Chkanikov ND. Synthesis of ethyl α-nitro-β-trifluoromethyl acrylate and β-trifluoromethyl-substituted tryptophan analogs and their plant growth regulating activity. Russ Chem Bull 2017. [DOI: 10.1007/s11172-017-1863-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Hu Q, Liu Y, Deng X, Li Y, Chen Y. Aluminium(III) Chloride-Catalyzed Three-Component Condensation of Aromatic Aldehydes, Nitroalkanes and Sodium Azide for the Synthesis of 4-Aryl-NH-1,2,3-triazoles. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600098] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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11
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Fioravanti S, Mancinelli F, Parise L, Pelagalli A, Pellacani L, Trulli L. β,β-Dialkyl γ-amino γ-trifluoromethyl alcohols from trifluoromethyl (E)-aldimines by a one-pot solvent-free Mannich-type reaction and subsequent reduction. RSC Adv 2016. [DOI: 10.1039/c6ra22507a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A diastereoselective one-pot solvent-free Mannich-type addition of α-alkyl aldehydes to trifluoromethyl (E)-aldimines, which first act as bases and then as electrophiles, leads to β,β-dialkyl γ-amino γ-CF3 alcohols in good yields, after reduction.
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Affiliation(s)
- Stefania Fioravanti
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- I-00185 Roma
- Italy
| | - Federico Mancinelli
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- I-00185 Roma
- Italy
| | - Luca Parise
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- I-00185 Roma
- Italy
| | - Alessia Pelagalli
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- I-00185 Roma
- Italy
| | - Lucio Pellacani
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- I-00185 Roma
- Italy
| | - Laura Trulli
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- I-00185 Roma
- Italy
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12
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Parise L, Pellacani L, Sciubba F, Trulli L, Fioravanti S. Stereoselective ZrCl4-Catalyzed Mannich-type Reaction of β-Keto Esters with Chiral Trifluoromethyl Aldimines. J Org Chem 2015. [PMID: 26204238 DOI: 10.1021/acs.joc.5b01379] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A method for the synthesis of fluorinated β'-amino β-dicarbonyl compounds using a Zr-catalyzed Mannich-type reaction has been developed, starting from N-protected trifluoromethyl aldimines and cyclic or acyclic β-keto esters bearing different ester residues. The in situ generated metallic complex reacted with optically pure trifluoromethyl aldimine derived from (R)-α-methylbenzylamine, giving a highly diastereoselective asymmetric Mannich-type addition with formation of a chiral quaternary center. The absolute configuration at the new chiral centers was assigned through two-dimensional nuclear Overhauser effect spectroscopic analysis coupled with computational studies.
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Affiliation(s)
- Luca Parise
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", Piazzale Aldo Moro 5, I-00185 Roma, Italy
| | - Lucio Pellacani
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", Piazzale Aldo Moro 5, I-00185 Roma, Italy
| | - Fabio Sciubba
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", Piazzale Aldo Moro 5, I-00185 Roma, Italy
| | - Laura Trulli
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", Piazzale Aldo Moro 5, I-00185 Roma, Italy
| | - Stefania Fioravanti
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", Piazzale Aldo Moro 5, I-00185 Roma, Italy
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13
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Fioravanti S, Parise L, Pelagalli A, Pellacani L, Trulli L. Trifluoromethyl syn- or anti-γ-amino alcohols by one-pot solvent-free Mannich-type reactions under temperature control. RSC Adv 2015. [DOI: 10.1039/c5ra01791b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A highly diastereoselective synthesis of fluorinated syn- or anti-γ-amino alcohols was reported by a simple and environmentally benign methodology. Unexpectedly, a strong influence of the reaction conditions on the facial selective attack was found.
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Affiliation(s)
- Stefania Fioravanti
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- I-00185 Roma
- Italy
| | - Luca Parise
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- I-00185 Roma
- Italy
| | - Alessia Pelagalli
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- I-00185 Roma
- Italy
| | - Lucio Pellacani
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- I-00185 Roma
- Italy
| | - Laura Trulli
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- I-00185 Roma
- Italy
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14
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Urbanietz G, Atodiresei I, Enders D. Asymmetric Synthesis of Functionalized Dihydro- and Tetrahydropyrans via an Organocatalytic Domino Michael-Hemiacetalization Reaction. SYNTHESIS-STUTTGART 2014; 46:1261-1269. [PMID: 25284900 DOI: 10.1055/s-0033-1340826] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Starting from α-hydroxymethyl nitroalkenes and various 1,3-dicarbonyl compounds, a one-pot organocatalyzed diastereo- and enantioselective synthesis of polyfunctionalized dihydro- and tetrahydropyran derivatives via a domino Michael-hemiacetalization sequence is reported. The title compounds bearing a variety of functional groups can be synthesized in this way in good yields (59-91%) and with moderate to excellent diastereoselectivities (26-98% de) and enantioselectivities (71-99% ee).
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Affiliation(s)
- Gregor Urbanietz
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Iuliana Atodiresei
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Dieter Enders
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
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15
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Baichurin RI, Baichurina LV, Aboskalova NI, Berestovitskaya VM. Synthesis and structure of β-aryl-α-nitroacrylates. RUSS J GEN CHEM+ 2013. [DOI: 10.1134/s1070363213090223] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Fioravanti S, Pellacani L, Vergari MC. Selective amination reactions of α-nitro aryl and heteroaryl enoates. J Org Chem 2013; 78:8203-7. [PMID: 23859537 DOI: 10.1021/jo4012859] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Highly functionalized tetrasubstituted alkenes were obtained by an unexpected amination reaction promoted by ethyl nosyloxycarbamate on various α-nitro aryl and heteroaryl enoates. A nitrene is likely the aminating species responsible for the observed insertion reaction leading to (E)-β-amino α-nitro enoates as the major products, regardless of the substrate configuration. The compounds, bearing two nitrogenous functional groups in different oxidation states, can be regarded as interesting synthons. In contrast, aziridination was observed for α-nitro alkyl enoates or β-nitro allylic alcohols.
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Affiliation(s)
- Stefania Fioravanti
- Dipartimento di Chimica, Università degli Studi di Roma La Sapienza, P.le A. Moro 5, I-00185 Roma, Italy.
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17
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Rasero-Almansa AM, Corma A, Iglesias M, Sánchez F. One-Pot Multifunctional Catalysis with NNN-Pincer Zr-MOF: Zr Base Catalyzed Condensation with Rh-Catalyzed Hydrogenation. ChemCatChem 2013. [DOI: 10.1002/cctc.201300371] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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18
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Fioravanti S, Pellacani L, Vergari MC. Fluorinated β-nitro amines by a selective ZrCl4-catalyzed aza-Henry reaction of (E)-trifluoromethyl aldimines. Org Biomol Chem 2013; 10:8207-10. [PMID: 23007677 DOI: 10.1039/c2ob26397a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ZrCl(4) was found to be an ideal catalyst to promote aza-Henry reactions between trifluoromethyl aldimines and some nitro alkanes giving new fluorinated β-nitro amines. The reaction is strongly influenced by the CF(3) group, the yield by the alkyl chain of the nitro compound, while the stereochemical outcome seems to be unaffected, the anti isomer being always the major product.
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Affiliation(s)
- Stefania Fioravanti
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", Italy.
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