1
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Jana R, Pradhan K. Shining light on the nitro group: distinct reactivity and selectivity. Chem Commun (Camb) 2024; 60:8806-8823. [PMID: 39081204 DOI: 10.1039/d4cc02582b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2024]
Abstract
The nitro moiety is an indispensable functional group in organic synthesis due to its facile introduction and reduction to the corresponding amines for a plethora of organic transformations. Owing to its distinct electronegative and conventional properties, it has been used for activated aromatic nucleophilic substitution (SNAr) reactions, Smiles reactions, Henry reactions, acyl anion equivalents, etc. Recently, the excellent photochemical properties of nitroarenes have been rediscovered by several groups, and their untapped potential in organic synthesis under UV or visible light irradiation has been exploited. Photoexcited nitroarenes can undergo facile reduction to amines, azo-coupling, metal-free reductive C-N coupling with boronic acids via a 1,2-boronate shift, hydrogen atom transfer (HAT), oxygen atom transfer for anaerobic oxidation of organic molecules, molecular editing via nitrene intermediates, denitrative coupling of β-nitrostyrene, radical α-alkylation of nitroalkanes, etc. They have also been used as a photolabile protecting group in medicinal chemistry and chemical biology applications. Here, we summarise the recent findings on visible-light-mediated transformations involving nitro-containing organic molecules.
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Affiliation(s)
- Ranjan Jana
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Kolkata 700032, India.
| | - Kangkan Pradhan
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Kolkata 700032, India.
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2
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Schuster F, Grau BW, Xu HG, Mokhir A, Tsogoeva SB. Dipeptide-catalysed Michael reaction under physiological conditions: Examination of potential bioorthogonality. Bioorg Med Chem 2024; 103:117650. [PMID: 38492540 DOI: 10.1016/j.bmc.2024.117650] [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: 08/02/2023] [Revised: 02/13/2024] [Accepted: 02/19/2024] [Indexed: 03/18/2024]
Abstract
Reactions for drug synthesis under cell-like conditions or even inside living cells can potentially be used e.g., to minimize toxic side effects, to maximize bioactive compound efficacy and/or to address drug delivery problems. Those reactions should be bioorthogonal to enable the generation of drug-like compounds with sufficiently good yields. In the known bioorthogonal Michael reactions, using thiols and phosphines as nucleophiles (e.g., in CS and CP bond formation reactions) is very common. No bioorthogonal Michael addition with a carbon nucleophile is known yet. Therefore, the development of such a reaction might be interesting for future drug discovery research. In this work, the metal-free Michael addition between cyclohexanone and various trans-β-nitrostyrenes (CC bond formation reaction), catalysed by a dipeptide salt H-Pro-Phe-O-Na+, was investigated for the first time in the presence of glutathione (GSH) and in phosphate-buffered saline (PBS). We demonstrated that with electron-withdrawing substituents on the aromatic ring and in β-position of the trans-β-nitrostyrene yields up to 64% can be obtained under physiological conditions, indicating a potential bioorthogonality of the studied Michael reaction. In addition, the selected Michael products demonstrated activity against human ovarian cancer cells A2780. This study opens up a new vista for forming bioactive compounds via CC bond formation Michael reactions under physiological (cell-like) conditions.
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Affiliation(s)
- Florian Schuster
- Organic Chemistry Chair I, Friedrich-Alexander University of Erlangen-Nürnberg, Nikolaus-Fiebiger-Straße 10, 91058 Erlangen, Germany
| | - Benedikt W Grau
- Organic Chemistry Chair I, Friedrich-Alexander University of Erlangen-Nürnberg, Nikolaus-Fiebiger-Straße 10, 91058 Erlangen, Germany
| | - Hong-Gui Xu
- Organic Chemistry Chair II, Friedrich-Alexander University of Erlangen-Nürnberg, Nikolaus-Fiebiger-Straße 10, 91058 Erlangen, Germany
| | - Andriy Mokhir
- Organic Chemistry Chair II, Friedrich-Alexander University of Erlangen-Nürnberg, Nikolaus-Fiebiger-Straße 10, 91058 Erlangen, Germany
| | - Svetlana B Tsogoeva
- Organic Chemistry Chair I, Friedrich-Alexander University of Erlangen-Nürnberg, Nikolaus-Fiebiger-Straße 10, 91058 Erlangen, Germany.
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3
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Balasubramani SG, Korchagina K, Schwartz S. Transition Path Sampling Study of Engineered Enzymes That Catalyze the Morita-Baylis-Hillman Reaction: Why Is Enzyme Design so Difficult? J Chem Inf Model 2024; 64:2101-2111. [PMID: 38451822 PMCID: PMC10963169 DOI: 10.1021/acs.jcim.4c00045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
It is hoped that artificial enzymes designed in laboratories can be efficient alternatives to chemical catalysts that have been used to synthesize organic molecules. However, the design of artificial enzymes is challenging and requires a detailed molecular-level analysis to understand the mechanism they promote in order to design efficient variants. In this study, we computationally investigate the mechanism of proficient Morita-Baylis-Hillman enzymes developed using a combination of computational design and directed evolution. The powerful transition path sampling method coupled with in-depth post-processing analysis has been successfully used to elucidate the different chemical pathways, transition states, protein dynamics, and free energy barriers of reactions catalyzed by such laboratory-optimized enzymes. This research provides an explanation for how different chemical modifications in an enzyme affect its catalytic activity in ways that are not predictable by static design algorithms.
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Affiliation(s)
- Sree Ganesh Balasubramani
- Department of Chemistry and Biochemistry, University of Arizona, 1306 E University Blvd, Tucson, Arizona 85721, United States
| | - Kseniia Korchagina
- Department of Chemistry and Biochemistry, University of Arizona, 1306 E University Blvd, Tucson, Arizona 85721, United States
| | - Steven Schwartz
- Department of Chemistry and Biochemistry, University of Arizona, 1306 E University Blvd, Tucson, Arizona 85721, United States
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4
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Santos H, Zeoly LA, Rodrigues MT, Fernandes FS, Gomes RC, Almeida WP, Coelho F. Recent Advances in Catalytic Systems for the Mechanistically Complex Morita–Baylis–Hillman Reaction. ACS Catal 2023. [DOI: 10.1021/acscatal.2c06420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
- Hugo Santos
- Institute of Chemistry, University of Campinas, Campinas 13083-970, São Paulo, Brazil
| | - Lucas A. Zeoly
- Institute of Chemistry, University of Campinas, Campinas 13083-970, São Paulo, Brazil
| | - Manoel T. Rodrigues
- Institute of Chemistry, University of Campinas, Campinas 13083-970, São Paulo, Brazil
| | - Fábio S. Fernandes
- Institute of Chemistry, University of Campinas, Campinas 13083-970, São Paulo, Brazil
| | - Ralph C. Gomes
- Institute of Chemistry, University of Campinas, Campinas 13083-970, São Paulo, Brazil
| | - Wanda P. Almeida
- Institute of Chemistry, University of Campinas, Campinas 13083-970, São Paulo, Brazil
| | - Fernando Coelho
- Institute of Chemistry, University of Campinas, Campinas 13083-970, São Paulo, Brazil
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5
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Bassetti B, Ballini R, Petrini M, Palmieri A. Diastereoselective Conversion of β‐Nitro‐β,γ‐Unsaturated Ketones into Conjugated (
E
,
E
)‐Dienones. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202201151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Benedetta Bassetti
- Green Chemistry Group, School of Sciences and Technology, Chemistry Division University of Camerino, ChIP Research Center Via Madonna delle Carceri 62032 Camerino (MC) Italy
| | - Roberto Ballini
- Green Chemistry Group, School of Sciences and Technology, Chemistry Division University of Camerino, ChIP Research Center Via Madonna delle Carceri 62032 Camerino (MC) Italy
| | - Marino Petrini
- Green Chemistry Group, School of Sciences and Technology, Chemistry Division University of Camerino, ChIP Research Center Via Madonna delle Carceri 62032 Camerino (MC) Italy
| | - Alessandro Palmieri
- Green Chemistry Group, School of Sciences and Technology, Chemistry Division University of Camerino, ChIP Research Center Via Madonna delle Carceri 62032 Camerino (MC) Italy
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6
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Mayr S, Zipse H. Annelated Pyridine Bases for the Selective Acylation of 1,2‐Diols. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Stefanie Mayr
- Ludwig-Maximilians-Universitat Munchen Chemistry GERMANY
| | - Hendrik Zipse
- Ludwig-Maximilians-Universität Department of Chemistry Butenandt-Str. 5-13 81377 München GERMANY
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7
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Stevanović D, Bugarinović J, Pešić M, Todosijević A, Bogdanović GA, Damljanović I. Chemoselective synthesis of multifunctional ferrocene-containing derivatives by the cross Rauhut-Currier reaction. RSC Adv 2021; 11:36208-36214. [PMID: 35492783 PMCID: PMC9043404 DOI: 10.1039/d1ra07619a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 11/03/2021] [Indexed: 12/05/2022] Open
Abstract
A simple protocol has been developed for the chemoselective synthesis of ferrocene-containing Rauhut-Currier adducts from 1-ferrocenyl-2-nitroethene and vinyl ketones using 20 mol% of triphenylphosphine. Multifunctional ferrocene derivatives were obtained in moderate to high yields (51-92%) by the coupling between the α-position of vinyl ketones and the β-position of the nitroalkene. The study of the Rauhut-Currier reaction under the described conditions showed that the strong electron-donating group at the β-position of nitroalkenes plays a significant role in the reaction outcome due to prevention of polymerization and stabilization of the zwitterionic intermediate. Additionally, a preparative synthesis of 4-ferrocenyl-3-methylene-5-nitropentan-2-one was carried out and its synthetic transformations showed easy conversion to other useful building blocks.
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Affiliation(s)
| | | | - Marko Pešić
- Faculty of Science, University of Kragujevac 34000 Kragujevac Serbia
| | | | - Goran A Bogdanović
- VINČA Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade 11001 Belgrade Serbia
| | - Ivan Damljanović
- Faculty of Science, University of Kragujevac 34000 Kragujevac Serbia
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8
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Richard NA, Charlton GD, Dyker CA. Enhancing catalytic activity of pyridines via para-iminophosphorano substituents. Org Biomol Chem 2021; 19:9167-9171. [PMID: 34664050 DOI: 10.1039/d1ob01630j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four pyridines decorated with π-donating iminophosphorano substituents (R3PN-) in the 4-position were assessed as acylation catalysts. These catalysts display high sensitivity to the groups at phosphorus, with activities that are well correlated to the corresponding Hammett-type substituent constants (σp+), and can achieve superior activity over the most active dialkylamino-substituted pyridines. Iminophosphorano-substituted pyridines represent an easily accessible, tunable, and highly active class of nucleophilic organocatalysts.
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Affiliation(s)
- Nicholas A Richard
- Department of Chemistry, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3, Canada.
| | - Grant D Charlton
- Department of Chemistry, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3, Canada.
| | - C Adam Dyker
- Department of Chemistry, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3, Canada.
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9
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Ng W, Lam Y, Hu R, Ng W, Yeung Y. Zwitterion‐Catalyzed Amino‐Dibromination of Nitroalkenes: Scope, Mechanism, and Application to The Synthesis of Glycinamides. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202000514] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Wing‐Hin Ng
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry The Chinese University of Hong Kong Shatin, NT Hong Kong P. R. China
| | - Ying‐Pong Lam
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry The Chinese University of Hong Kong Shatin, NT Hong Kong P. R. China
| | - Rong‐Bin Hu
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry The Chinese University of Hong Kong Shatin, NT Hong Kong P. R. China
| | - Wing‐Lok Ng
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry The Chinese University of Hong Kong Shatin, NT Hong Kong P. R. China
| | - Ying‐Yeung Yeung
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry The Chinese University of Hong Kong Shatin, NT Hong Kong P. R. China
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10
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Jangid DK. DABCO as a Base and an Organocatalyst in Organic Synthesis: A Review. CURRENT GREEN CHEMISTRY 2020. [DOI: 10.2174/2213346107666191227101538] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
One of the organocatalysts 1,4-diazabicyclo[2.2.2]octane (DABCO) is an excellent solid
catalyst in a number of reactions. It is also a good nucleophile and a base in numerous reactions for the
synthesis of heterocycles. DABCO catalyzes many reactions like cycloaddition reactions, coupling reactions,
Baylis-Hillman reaction, Henry reaction, ring opening reactions, etc. One more advanced feature
of these reactions is that they proceed through environmental friendly pathway. DABCO has
more advantages than other organic catalysts because it is an inexpensive, non.toxic base, an ecofriendly
and a highly reactive catalyst for building of organic frameworks, which produce the desired
products in excellent yields with high selectivity. Many catalytic applications of DABCO have been
reported for the synthesis of an organic framework which has been discussed in this review.
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Affiliation(s)
- Dinesh K. Jangid
- Department of Chemistry, Faculty of Science, University of Rajasthan, JLN Marg, Jaipur, Rajasthan, India
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11
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Alam M, Park S. Spectroscopic Identifications, Molecular Docking, Neuronal Growth and Enzyme Inhibitory Activities of Steroidal Nitro Olefin: Quantum Chemical Study. ChemistrySelect 2019. [DOI: 10.1002/slct.201902093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mahboob Alam
- Division of Chemistry and BiotechnologyDongguk University Gyeongju 780-714 South Korea
| | - Soonheum Park
- Department of Advanced Materials ChemistryDongguk University Gyeongju 780-714 South Korea
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12
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Motornov VA, Tabolin AA, Nelyubina YV, Nenajdenko VG, Ioffe SL. Copper-mediated oxidative [3 + 2]-annulation of nitroalkenes and pyridinium ylides: general access to functionalized indolizines and efficient synthesis of 1-fluoroindolizines. Org Biomol Chem 2019; 17:1442-1454. [PMID: 30672946 DOI: 10.1039/c8ob03126f] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A general method for the synthesis of substituted indolizines by copper(ii) acetate-promoted oxidative [3 + 2]-annulation of α-fluoronitroalkenes with in situ generated pyridinium ylides was developed. Application of the copper(ii) acetate-2,6-lutidine system provides efficient access to various 1-fluoroindolizines in up to 81% yield. Both electron-rich and electron-deficient nitroalkenes as well as different pyridinium and isoquinolinium salts can be involved in the reaction. Moreover, it was found that copper-mediated annulation is applicable for other α-substituted (alkyl, chloro, and ester) nitroalkenes giving rise to the corresponding indolizines. First synthesis of monofluorinated [3,2,2]cyclazines was demonstrated via oxidative annulation of 3-unsubstituted fluoroindolizines with diethyl acetylene dicarboxylate.
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Affiliation(s)
- Vladimir A Motornov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prosp. 47, Moscow, 119991, Russia.
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13
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Streitferdt V, Haindl MH, Hioe J, Morana F, Renzi P, von Rekowski F, Zimmermann A, Nardi M, Zeitler K, Gschwind RM. Unprecedented Mechanism of an Organocatalytic Route to Conjugated Enynes with a Junction to Cyclic Nitronates. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801153] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Verena Streitferdt
- Faculty of Chemistry and Pharmacy University of Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Michael H. Haindl
- Faculty of Chemistry and Pharmacy University of Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Johnny Hioe
- Faculty of Chemistry and Pharmacy University of Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Fabio Morana
- Faculty of Chemistry and Pharmacy University of Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Polyssena Renzi
- Faculty of Chemistry and Pharmacy University of Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Felicitas von Rekowski
- Faculty of Chemistry and Pharmacy University of Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Alexander Zimmermann
- Faculty of Chemistry and Pharmacy University of Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Martina Nardi
- Faculty of Chemistry and Pharmacy University of Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Kirsten Zeitler
- Faculty of Chemistry and Pharmacy University of Regensburg Universitätsstr. 31 93053 Regensburg Germany
- Institute of Organic Chemistry University of Leipzig Johannisallee 29 04103 Leipzig Germany
| | - Ruth M. Gschwind
- Faculty of Chemistry and Pharmacy University of Regensburg Universitätsstr. 31 93053 Regensburg Germany
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14
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15
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Tamaki A, Kojima S, Yamamoto Y. Examination of Pyridazine as a Possible Scaffold for Nucleophilic Catalysis. J Org Chem 2016; 81:8710-8721. [PMID: 27494050 DOI: 10.1021/acs.joc.6b00630] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Pyridazines with amino groups positioned para to each aromatic ring nitrogen and fixed in six-membered rings were prepared. The representative symmetric amino N-Et derivative was found to slightly exceed DMAP in catalytic activity in the acetylation reaction of a tertiary alcohol in C6D6. Nucleophilicity eclipsing that of DMAP was established in competitive reactions using phenacyl bromide as the electrophile, and the unsymmetric N-Et derivative was revealed to have even higher nucleophilicity.
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Affiliation(s)
- Airi Tamaki
- Department of Chemistry, Graduate School of Science, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - Satoshi Kojima
- Department of Chemistry, Graduate School of Science, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan.,Center for Quantum Life Sciences, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - Yohsuke Yamamoto
- Department of Chemistry, Graduate School of Science, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
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16
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Stereoselective reactions of nitro compounds in the synthesis of natural compound analogs and active pharmaceutical ingredients. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.07.067] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Gupta T, Bharadwaj KC, Singh RM. Cascade SN2′-SNAr, Elimination, and 1,5-Hydride Shift Reactions by Acetylacetone/Acetoacetic Esters: Synthesis of 9,10-Dihydroacridines. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600911] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tanu Gupta
- Department of Chemistry; Centre of Advanced Study; Institute of Science; Banaras Hindu University; Varanasi India
| | - Kishor Chandra Bharadwaj
- Department of Chemistry; Centre of Advanced Study; Institute of Science; Banaras Hindu University; Varanasi India
| | - Radhey M. Singh
- Department of Chemistry; Centre of Advanced Study; Institute of Science; Banaras Hindu University; Varanasi India
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18
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Barbier V, Couty F, David OR. Furan-2,3-diones as masked dipoles: synthesis of isotetronic acids and mechanistic considerations. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.07.072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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19
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Günler ZI, Companyó X, Alfonso I, Burés J, Jimeno C, Pericàs MA. Deciphering the roles of multiple additives in organocatalyzed Michael additions. Chem Commun (Camb) 2016; 52:6821-4. [PMID: 27128165 DOI: 10.1039/c6cc01026a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The synergistic effects of multiple additives (water and acetic acid) on the asymmetric Michael addition of acetone to nitrostyrene catalyzed by primary amine-thioureas (PAT) were precisely determined. Acetic acid facilitates hydrolysis of the imine intermediates, thus leading to catalytic behavior, and minimizes the formation of the double addition side product. In contrast, water slows down the reaction but minimizes catalyst deactivation, eventually leading to higher final yields.
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Affiliation(s)
- Z Inci Günler
- Department of Biological Chemistry and Molecular Modelling, Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18-26, E08034, Barcelona, Spain.
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20
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Mane V, Pandey J, Ayyagari N, Dey C, Kale R, Namboothiri INN. Synthesis of hydrazinoheterocycles from Morita–Baylis–Hillman adducts of nitroalkenes with azodicarboxylates. Org Biomol Chem 2016; 14:2427-38. [DOI: 10.1039/c5ob02656c] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Hydrazinonitroalkenes derived from nitroalkenes and azodicarboxylates are excellent substrates for the synthesis of hitherto unreported hydrazinotriazoles and hydrazinodihydrofurans.
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Affiliation(s)
- Vaijinath Mane
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Jyoti Pandey
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Narasihmam Ayyagari
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Chandan Dey
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Raju Kale
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
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21
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Bharadwaj KC, Tiwari DK. Double Morita–Baylis–Hillman (MBH) strategy; an intermolecular and a chemo selective intramolecular MBH reactions for 5/6 substituted, functionalized piperidine unit. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.11.041] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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22
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Barbier V, Marrot J, Couty F, David ORP. β-Lactams as Formal Dipoles through Amide-Bond Activation. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501342] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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23
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Gopi E, Kumar T, Menna-Barreto RFS, Valença WO, da Silva Júnior EN, Namboothiri INN. Imidazoles from nitroallylic acetates and α-bromonitroalkenes with amidines: synthesis and trypanocidal activity studies. Org Biomol Chem 2015; 13:9862-71. [DOI: 10.1039/c5ob01444a] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
One-pot cascade reactions of amidines with nitroallylic acetates and α-bromonitroalkenes provide functionalized imidazoles that exhibit trypanocidal activity.
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Affiliation(s)
- Elumalai Gopi
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
| | - Tarun Kumar
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
| | | | - Wagner O. Valença
- Institute of Exact Sciences
- Department of Chemistry
- Federal University of Minas Gerais
- Belo Horizonte
- Brazil
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24
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Mane V, Kumar T, Pradhan S, Katiyar S, Namboothiri INN. One-pot regioselective synthesis of functionalized and fused furans from Morita–Baylis–Hillman and Rauhut–Currier adducts of nitroalkenes. RSC Adv 2015. [DOI: 10.1039/c5ra11471c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Functionalized and fused furans were synthesized by a one-pot regioselective cascade reaction from Morita–Baylis–Hillman acetates and Rauhut–Currier adducts of nitroalkenes.
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Affiliation(s)
- Vaijinath Mane
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Tarun Kumar
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Sourav Pradhan
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Savita Katiyar
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
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