1
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Guerzoni MG, van Ingen Y, Babaahmadi R, Wirth T, Richards E, Melen RL. An un-forgotten classic: the nitro-Mannich reaction between nitrones and silyl nitronates catalysed by B(C 6F 5) 3. Chem Sci 2024; 15:2648-2654. [PMID: 38362430 PMCID: PMC10866342 DOI: 10.1039/d3sc05672d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 12/28/2023] [Indexed: 02/17/2024] Open
Abstract
Herein we report the B(C6F5)3-catalysed nitro-Mannich reaction between nitrones and silyl nitronates, affording silyl-protected α-nitro hydroxylamines with yields up to 99% and diastereoselectivities up to 99 : 1. Crucially, the obtained products can be converted into 1,2-diamines under simple reductive conditions. This work provides a new orthogonal method to the existing routes for the instalment of a nitro moiety under Lewis acid catalysed conditions, and expands the state-of-the-art substrate scope with respect to the silyl nitronates.
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Affiliation(s)
- Michael G Guerzoni
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Translational Research Hub Maindy Road, Cathays Cardiff CF24 4HQ Cymru/Wales UK
| | - Yara van Ingen
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Translational Research Hub Maindy Road, Cathays Cardiff CF24 4HQ Cymru/Wales UK
| | - Rasool Babaahmadi
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Translational Research Hub Maindy Road, Cathays Cardiff CF24 4HQ Cymru/Wales UK
| | - Thomas Wirth
- School of Chemistry, Cardiff University, Main Building Park Place Cardiff CF10 3AT Cymru/Wales UK
| | - Emma Richards
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Translational Research Hub Maindy Road, Cathays Cardiff CF24 4HQ Cymru/Wales UK
- School of Chemistry, Cardiff University, Main Building Park Place Cardiff CF10 3AT Cymru/Wales UK
| | - Rebecca L Melen
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Translational Research Hub Maindy Road, Cathays Cardiff CF24 4HQ Cymru/Wales UK
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2
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Nagy BS, Llanes P, Pericas MA, Kappe CO, Ötvös SB. Enantioselective Flow Synthesis of Rolipram Enabled by a Telescoped Asymmetric Conjugate Addition-Oxidative Aldehyde Esterification Sequence Using in Situ-Generated Persulfuric Acid as Oxidant. Org Lett 2022; 24:1066-1071. [PMID: 35050638 PMCID: PMC8822492 DOI: 10.1021/acs.orglett.1c04300] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A novel approach is reported for the enantioselective flow synthesis of rolipram comprising a telescoped asymmetric conjugate addition-oxidative aldehyde esterification sequence followed by trichlorosilane-mediated nitro group reduction and concomitant lactamization. The telescoped process takes advantage of a polystyrene-supported chiral organocatalyst along with in situ-generated persulfuric acid as a robust and scalable oxidant for direct aldehyde esterification. This approach demonstrates significantly improved productivity compared with earlier methodologies while ensuring environmentally benign metal-free conditions.
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Affiliation(s)
- Bence S Nagy
- Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstrasse 28, A-8010 Graz, Austria
| | - Patricia Llanes
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST), Av. Països Catalans 16, E-43007 Tarragona, Spain
| | - Miquel A Pericas
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST), Av. Països Catalans 16, E-43007 Tarragona, Spain.,Departament de Química Inorgànica i Orgànica, Universitat de Barcelona (UB), E-08028 Barcelona, Spain
| | - C Oliver Kappe
- Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstrasse 28, A-8010 Graz, Austria.,Center for Continuous Flow Synthesis and Processing (CC FLOW), Research Center Pharmaceutical Engineering GmbH (RCPE), Inffeldgasse 13, A-8010 Graz, Austria
| | - Sándor B Ötvös
- Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstrasse 28, A-8010 Graz, Austria.,Center for Continuous Flow Synthesis and Processing (CC FLOW), Research Center Pharmaceutical Engineering GmbH (RCPE), Inffeldgasse 13, A-8010 Graz, Austria
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3
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Chakraborty S, Sasson Y. Selective reduction of aromatic halonitroarene to corresponding amine with Ru-gC3N4 as a catalyst in presence of sodium hypophosphite as a hydrogen source. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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4
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Sahoo P, Majumdar M. Reductively disilylated N-heterocycles as versatile organosilicon reagents. Dalton Trans 2021; 51:1281-1296. [PMID: 34889336 DOI: 10.1039/d1dt03331j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The reductively disilylated N-heterocyclic systems 1,4-bis(trimethylsilyl)-1-aza-2,5-cyclohexadiene (1Si), 1,4-bis(trimethylsilyl)-1,4-dihydropyrazine (2Si) and its methyl derivatives (3Si and 4Si), and 1,1'-bis(trimethylsilyl)-4,4'-bipyridinylidene (5Si) are proficient organosilicon reagents owing to their low first vertical ionization potentials and the heterophilicity of the polarized N-Si bonds. These have prompted their reactivity as two-electron reductants or reductive silylations. These reactions benefit from the concomitant rearomatization of the N-heterocycles and liberation of trimethylsilyl halides or (Me3Si)2O, which are mostly volatile or easily removable byproducts. In this perspective, we have discussed the utilization of these reductively disilylated N-heterocyclic systems as versatile reagents in the salt-free reduction of transition metals (A) and main-group halides (B), in organic transformations (C) and in materials syntheses (D).
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Affiliation(s)
- Padmini Sahoo
- Department of Chemistry, Indian Institute of Science Education and Research, Pune-411008, Maharashtra, India.
| | - Moumita Majumdar
- Department of Chemistry, Indian Institute of Science Education and Research, Pune-411008, Maharashtra, India.
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5
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Popov KK, Campbell JLP, Kysilka O, Hošek J, Davies CD, Pour M, Kočovský P. Reductive Amination Revisited: Reduction of Aldimines with Trichlorosilane Catalyzed by Dimethylformamide─Functional Group Tolerance, Scope, and Limitations. J Org Chem 2021; 87:920-943. [PMID: 34841878 DOI: 10.1021/acs.joc.1c01561] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Aldimines, generated in situ from aliphatic, aromatic, and heteroaromatic aldehydes and aliphatic, aromatic, and heteroaromatic primary or secondary amines, can be reduced with trichlorosilane in the presence of dimethylformamide (DMF) as an organocatalyst (≤10 mol %) in toluene or CH2Cl2 at room temperature. The reduction tolerates ketone carbonyls, esters, amides, nitriles, sulfones, sulfonamides, NO2, SF5, and CF3 groups, boronic esters, azides, phosphine oxides, C═C and C≡C bonds, and ferrocenyl nucleus, but sulfoxides and N-oxides are reduced. α,β-Unsaturated aldimines undergo 1,2-reduction only, leaving the C═C bond intact. N-Monoalkylation of primary amines is attained with a 1:1 aldehyde to amine ratio, whereas excess of the aldehyde (≥2:1) allows second alkylation, giving rise to tertiary amines. Reductive N-alkylation of α-amino acids proceeds without racemization; the resulting products, containing a C≡C bond or N3 group, are suitable for click chemistry. This reaction thus offers advantages over the traditional methods (borohydride reduction or catalytic hydrogenation) in terms of efficiency and chemoselectivity. Solubility of some of the reacting partners appears to be the only limitation. The byproducts generated by the workup with aqueous NaHCO3 (i.e., NaCl and silica) are environmentally benign. As a greener alternative, DMA can be employed as a catalyst instead of DMF.
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Affiliation(s)
- Kirill K Popov
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 43 Prague 2, Czech Republic
| | - Joanna L P Campbell
- Syngenta, Grangemouth Manufacturing Centre, Earl's Road, Grangemouth FK3 8XG, U.K
| | - Ondřej Kysilka
- Trelleborg Bohemia, Akademika Bedrny 531/8a, Věkoše, 500 03 Hradec Králové Czech Republic
| | - Jan Hošek
- Farmak, Na vlčinci 16/3, Klášterní Hradisko, 77900 Olomouc, Czech Republic
| | | | - Milan Pour
- Department of Organic and Bioorganic Chemistry, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic
| | - Pavel Kočovský
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 43 Prague 2, Czech Republic.,Department of Organic and Bioorganic Chemistry, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic.,Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo 2, 166 10 Prague 6, Czech Republic
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6
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Maciá M, Porcar R, Martí-Centelles V, García-Verdugo E, Burguete MI, Luis SV. Rational Design of Simple Organocatalysts for the HSiCl 3 Enantioselective Reduction of (E)- N-(1-Phenylethylidene)aniline. Molecules 2021; 26:6963. [PMID: 34834055 PMCID: PMC8625272 DOI: 10.3390/molecules26226963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/16/2021] [Accepted: 11/16/2021] [Indexed: 11/17/2022] Open
Abstract
Prolinamides are well-known organocatalysts for the HSiCl3 reduction of imines; however, custom design of catalysts is based on trial-and-error experiments. In this work, we have used a combination of computational calculations and experimental work, including kinetic analyses, to properly understand this process and to design optimized catalysts for the benchmark (E)-N-(1-phenylethylidene)aniline. The best results have been obtained with the amide derived from 4-methoxyaniline and the N-pivaloyl protected proline, for which the catalyzed process is almost 600 times faster than the uncatalyzed one. Mechanistic studies reveal that the formation of the component supramolecular complex catalyst-HSiCl3-substrate, involving hydrogen bonding breaking and costly conformational changes in the prolinamide, is an important step in the overall process.
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Affiliation(s)
- María Maciá
- Department of Inorganic and Organic Chemistry, Jaume I University, Av. Vicent Sos Baynat s/n, 12071 Castellón, Spain; (M.M.); (R.P.); (V.M.-C.); (M.I.B.)
| | - Raúl Porcar
- Department of Inorganic and Organic Chemistry, Jaume I University, Av. Vicent Sos Baynat s/n, 12071 Castellón, Spain; (M.M.); (R.P.); (V.M.-C.); (M.I.B.)
- Department of Organic and Bio-Organic Chemistry, Faculty of Science, UNED—Universidad Nacional de Educación a Distancia, Avenida de Esparta s/n, 28232 Las Rozas-Madrid, Spain
| | - Vicente Martí-Centelles
- Department of Inorganic and Organic Chemistry, Jaume I University, Av. Vicent Sos Baynat s/n, 12071 Castellón, Spain; (M.M.); (R.P.); (V.M.-C.); (M.I.B.)
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, 46022 Valencia, Spain
| | - Eduardo García-Verdugo
- Department of Inorganic and Organic Chemistry, Jaume I University, Av. Vicent Sos Baynat s/n, 12071 Castellón, Spain; (M.M.); (R.P.); (V.M.-C.); (M.I.B.)
| | - Maria Isabel Burguete
- Department of Inorganic and Organic Chemistry, Jaume I University, Av. Vicent Sos Baynat s/n, 12071 Castellón, Spain; (M.M.); (R.P.); (V.M.-C.); (M.I.B.)
| | - Santiago V. Luis
- Department of Inorganic and Organic Chemistry, Jaume I University, Av. Vicent Sos Baynat s/n, 12071 Castellón, Spain; (M.M.); (R.P.); (V.M.-C.); (M.I.B.)
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7
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Pirola M, Faverio C, Orlandi M, Benaglia M. Metal-Free Deoxygenation of Chiral Nitroalkanes: An Easy Entry to α-Substituted Enantiomerically Enriched Nitriles. Chemistry 2021; 27:10247-10250. [PMID: 34021644 DOI: 10.1002/chem.202100889] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Indexed: 12/25/2022]
Abstract
A metal-free, mild and chemodivergent transformation involving nitroalkanes has been developed. Under optimized reaction conditions, in the presence of trichlorosilane and a tertiary amine, aliphatic nitroalkanes were selectively converted into amines or nitriles. Furthermore, when chiral β-substituted nitro compounds were reacted, the stereochemical integrity of the stereocenter was maintained and α-functionalized nitriles were obtained with no loss of enantiomeric excess. The methodology was successfully applied to the synthesis of chiral β-cyano esters, α-aryl alkylnitriles, and TBS-protected cyanohydrins, including direct precursors of four active pharmaceutical ingredients (ibuprofen, tembamide, aegeline and denopamine).
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Affiliation(s)
- Margherita Pirola
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi, 19, 20133, Milano, Italy
| | - Chiara Faverio
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi, 19, 20133, Milano, Italy
| | - Manuel Orlandi
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo, 1, 35131, Padova, Italy
| | - Maurizio Benaglia
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi, 19, 20133, Milano, Italy
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8
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Bao Z, Lü J, Jin Z. Photochemical Reduction of Nitroaromatics Mediated by p-Toluenethiol/PCy 3. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202109037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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9
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Romero AH. Reduction of Nitroarenes via Catalytic Transfer Hydrogenation Using Formic Acid as Hydrogen Source: A Comprehensive Review. ChemistrySelect 2020. [DOI: 10.1002/slct.202002838] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Angel H. Romero
- Laboratorio de Química Orgánica y Química Medicinal Departamento de Química Orgánica Facultad de Ciencias Universidad de la Republica Igual 4225 11400 Montevideo
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10
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Massolo E, Pirola M, Benaglia M. Amide Bond Formation Strategies: Latest Advances on a Dateless Transformation. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000080] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Elisabetta Massolo
- Dipartimento di Chimica; Università degli Studi di Milano; Via Golgi 19 20133 Milano Italy
| | - Margherita Pirola
- Dipartimento di Chimica; Università degli Studi di Milano; Via Golgi 19 20133 Milano Italy
| | - Maurizio Benaglia
- Dipartimento di Chimica; Università degli Studi di Milano; Via Golgi 19 20133 Milano Italy
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11
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Romero AH, Cerecetto H. A Common, Facile and Eco-Friendly Method for the Reduction of Nitroarenes, Selective Reduction of Poly-Nitroarenes and Deoxygenation of N
-Oxide Containing Heteroarenes Using Elemental Sulfur. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000064] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Angel H. Romero
- Laboratorio de Química Orgánica Medicinal; Instituto de Química Biológica; Facultad de Ciencias; Universidad de la Republica; Igual 4225 11400 Montevideo Uruguay
| | - Hugo Cerecetto
- Laboratorio de Química Orgánica Medicinal; Instituto de Química Biológica; Facultad de Ciencias; Universidad de la Republica; Igual 4225 11400 Montevideo Uruguay
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12
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Skonieczny K, Espinoza EM, Derr JB, Morales M, Clinton JM, Xia B, Vullev VI. Biomimetic and bioinspired molecular electrets. How to make them and why does the established peptide chemistry not always work? PURE APPL CHEM 2020. [DOI: 10.1515/pac-2019-0111] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract“Biomimetic” and “bioinspired” define different aspects of the impacts that biology exerts on science and engineering. Biomimicking improves the understanding of how living systems work, and builds tools for bioinspired endeavors. Biological inspiration takes ideas from biology and implements them in unorthodox manners, exceeding what nature offers. Molecular electrets, i.e. systems with ordered electric dipoles, are key for advancing charge-transfer (CT) science and engineering. Protein helices and their biomimetic analogues, based on synthetic polypeptides, are the best-known molecular electrets. The inability of native polypeptide backbones to efficiently mediate long-range CT, however, limits their utility. Bioinspired molecular electrets based on anthranilamides can overcome the limitations of their biological and biomimetic counterparts. Polypeptide helices are easy to synthesize using established automated protocols. These protocols, however, fail to produce even short anthranilamide oligomers. For making anthranilamides, the residues are introduced as their nitrobenzoic-acid derivatives, and the oligomers are built from their C- to their N-termini via amide-coupling and nitro-reduction steps. The stringent requirements for these reduction and coupling steps pose non-trivial challenges, such as high selectivity, quantitative yields, and fast completion under mild conditions. Addressing these challenges will provide access to bioinspired molecular electrets essential for organic electronics and energy conversion.
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Affiliation(s)
- Kamil Skonieczny
- Department of Bioengineering, University of California, Riverside, CA 92521, USA
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224 Warsaw, Poland
| | - Eli M. Espinoza
- Department of Chemistry, University of California, Riverside, CA 92521, USA
| | - James B. Derr
- Department of Biochemistry, University of California, Riverside, CA 92521, USA
| | - Maryann Morales
- Department of Chemistry, University of California, Riverside, CA 92521, USA
| | - Jillian M. Clinton
- Department of Bioengineering, University of California, Riverside, CA 92521, USA
| | - Bing Xia
- GlaxoSmithKline, 200 Cambridgepark Dr., Cambridge, MA 02140, USA
| | - Valentine I. Vullev
- Department of Bioengineering, University of California, Riverside, CA 92521, USA
- Department of Chemistry, University of California, Riverside, CA 92521, USA
- Department of Biochemistry, University of California, Riverside, CA 92521, USA
- Materials Science and Engineering Program, University of California, Riverside, CA 92521, USA
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13
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Massolo E, Pirola M, Puglisi A, Rossi S, Benaglia M. A one pot protocol to convert nitro-arenes into N-aryl amides. RSC Adv 2020; 10:4040-4044. [PMID: 35492662 PMCID: PMC9048774 DOI: 10.1039/c9ra10758d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 01/13/2020] [Indexed: 02/04/2023] Open
Abstract
A two-step one pot, experimentally simple protocol, based on readily available and inexpensive reagents allowed the conversion of nitro-arenes directly to N-aryl amides. A metal-free reduction of the nitro group, mediated by trichlorosilane, followed by the addition of an anhydride afforded the corresponding N-aryl carboxyamide, that was isolated after a simple aqueous work up in good-excellent yields. When the methodology was applied to the reaction with γ-butyrolactone, the desired N-aryl butanamide derivative was obtained, featuring a chlorine atom at the γ-position, a functionalized handle that can be used for further synthetic manipulation of the reaction product. Such an intermediate has already been employed as a key advanced precursor of pharmaceutically active compounds.
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Affiliation(s)
- Elisabetta Massolo
- Dipartimento di Chimica, Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Margherita Pirola
- Dipartimento di Chimica, Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Alessandra Puglisi
- Dipartimento di Chimica, Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Sergio Rossi
- Dipartimento di Chimica, Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Maurizio Benaglia
- Dipartimento di Chimica, Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
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14
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Hosoya H, Misal Castro LC, Sultan I, Nakajima Y, Ohmura T, Sato K, Tsurugi H, Suginome M, Mashima K. 4,4′-Bipyridyl-Catalyzed Reduction of Nitroarenes by Bis(neopentylglycolato)diboron. Org Lett 2019; 21:9812-9817. [DOI: 10.1021/acs.orglett.9b03419] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Hiromu Hosoya
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Osaka 560-8531, Japan
| | - Luis C. Misal Castro
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Osaka 560-8531, Japan
| | - Ibrahim Sultan
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Osaka 560-8531, Japan
| | - Yumiko Nakajima
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki 305-8565, Japan
| | - Toshimichi Ohmura
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Kazuhiko Sato
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki 305-8565, Japan
| | - Hayato Tsurugi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Osaka 560-8531, Japan
| | - Michinori Suginome
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Osaka 560-8531, Japan
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15
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Sugiura M, Ashikari Y, Takahashi Y, Yamaguchi K, Kotani S, Nakajima M. Lewis Base-Catalyzed Enantioselective Conjugate Reduction of β,β-Disubstituted α,β-Unsaturated Ketones with Trichlorosilane: E/ Z-Isomerization, Regioselectivity, and Synthetic Applications. J Org Chem 2019; 84:11458-11473. [PMID: 31449412 DOI: 10.1021/acs.joc.9b01298] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The chiral bisphosphine dioxide-catalyzed asymmetric conjugate reduction of acyclic β,β-disubstituted α,β-unsaturated ketones with trichlorosilane affords saturated ketones having a stereogenic carbon center at the carbonyl β-position with high enantioselectivities. Because the E/Z-isomerizations of enone substrates occur concomitantly, reduction products with the same absolute configurations are obtained from either (E)- or (Z)-enones. Conjugate reduction is accelerated in the presence of an electron-rich aryl group at the β-position of the enone owing to its carbocation-stabilizing ability. Computational studies were also conducted in order to elucidate the origin of the observed enantioselectivity. The regio- and enantioselective reductions of dienones were realized and applied to the syntheses of ar-turmerone, turmeronol A, mutisianthol, and jungianol, which are optically active sesquiterpenes.
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Affiliation(s)
- Masaharu Sugiura
- Faculty of Pharmaceutical Sciences , Sojo University , 4-22-1 Ikeda , Nishi-ku, Kumamoto 860-0082 , Japan
| | - Yasuhiko Ashikari
- Graduate School of Pharmaceutical Sciences , Kumamoto University , 5-1 Oe-honmachi , Chuo-ku, Kumamoto 862-0973 , Japan
| | - Yuka Takahashi
- Graduate School of Pharmaceutical Sciences , Kumamoto University , 5-1 Oe-honmachi , Chuo-ku, Kumamoto 862-0973 , Japan
| | - Koki Yamaguchi
- Faculty of Pharmaceutical Sciences , Sojo University , 4-22-1 Ikeda , Nishi-ku, Kumamoto 860-0082 , Japan
| | - Shunsuke Kotani
- Graduate School of Pharmaceutical Sciences , Kumamoto University , 5-1 Oe-honmachi , Chuo-ku, Kumamoto 862-0973 , Japan
| | - Makoto Nakajima
- Graduate School of Pharmaceutical Sciences , Kumamoto University , 5-1 Oe-honmachi , Chuo-ku, Kumamoto 862-0973 , Japan
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16
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Bhattacharjee A, Hosoya H, Ikeda H, Nishi K, Tsurugi H, Mashima K. Metal-Free Deoxygenation and Reductive Disilylation of Nitroarenes by Organosilicon Reducing Reagents. Chemistry 2018; 24:11278-11282. [DOI: 10.1002/chem.201801972] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Argha Bhattacharjee
- Department of Chemistry, Graduate School of Engineering Science; Osaka University; 1-3, Machikaneyama-cho Toyonaka Osaka 560-8531 Japan
| | - Hiromu Hosoya
- Department of Chemistry, Graduate School of Engineering Science; Osaka University; 1-3, Machikaneyama-cho Toyonaka Osaka 560-8531 Japan
| | - Hideaki Ikeda
- Department of Chemistry, Graduate School of Engineering Science; Osaka University; 1-3, Machikaneyama-cho Toyonaka Osaka 560-8531 Japan
| | - Kohei Nishi
- Department of Chemistry, Graduate School of Engineering Science; Osaka University; 1-3, Machikaneyama-cho Toyonaka Osaka 560-8531 Japan
| | - Hayato Tsurugi
- Department of Chemistry, Graduate School of Engineering Science; Osaka University; 1-3, Machikaneyama-cho Toyonaka Osaka 560-8531 Japan
| | - Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science; Osaka University; 1-3, Machikaneyama-cho Toyonaka Osaka 560-8531 Japan
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17
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18
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Teichmann J, Wagner M. Silicon chemistry in zero to three dimensions: from dichlorosilylene to silafullerane. Chem Commun (Camb) 2018; 54:1397-1412. [DOI: 10.1039/c7cc09063c] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
As one of the simplest examples of functionalized Si(ii) species, the SiCl2/[SiCl3]− system is not only fundamentally interesting, but also an important starting point for the assembly of oligosilane chains, rings, and clusters.
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Affiliation(s)
- J. Teichmann
- Institut für Anorganische Chemie
- Goethe-Universität Frankfurt am Main
- 60438 Frankfurt am Main
- Germany
| | - M. Wagner
- Institut für Anorganische Chemie
- Goethe-Universität Frankfurt am Main
- 60438 Frankfurt am Main
- Germany
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19
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Zhu C, Gras E, Duhayon C, Lacassin F, Cui X, Chauvin R. The Forgotten Nitroaromatic Phosphines as Weakly Donating P-ligands: AnN-Aryl-benzimidazolyl Series in RhCl(CO) Complexes. Chem Asian J 2017; 12:2845-2856. [DOI: 10.1002/asia.201701078] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Chongwei Zhu
- CNRS; LCC (Laboratoire de Chimie de Coordination); 205 route de Narbonne, BP44099 31077 Toulouse Cedex 4 France
- Université de Toulouse; UPS, ICT-FR 2599 31062 Toulouse Cedex 9 France
| | - Emmanuel Gras
- CNRS; LCC (Laboratoire de Chimie de Coordination); 205 route de Narbonne, BP44099 31077 Toulouse Cedex 4 France
- Université de Toulouse; UPS, ICT-FR 2599 31062 Toulouse Cedex 9 France
| | - Carine Duhayon
- CNRS; LCC (Laboratoire de Chimie de Coordination); 205 route de Narbonne, BP44099 31077 Toulouse Cedex 4 France
- Université de Toulouse; UPS, ICT-FR 2599 31062 Toulouse Cedex 9 France
| | - Francis Lacassin
- CNRS; LCC (Laboratoire de Chimie de Coordination); 205 route de Narbonne, BP44099 31077 Toulouse Cedex 4 France
- Université de Toulouse; UPS, ICT-FR 2599 31062 Toulouse Cedex 9 France
| | - Xiuling Cui
- Engineering Research Center of Molecular Medicine, Ministry of Education, Key Laboratory of Xiamen Marine and Gene Drugs, Institutes of Molecular Medicine and School of Biomedical Sciences; Huaqiao University; Xiamen 361021 P.R. China
| | - Remi Chauvin
- CNRS; LCC (Laboratoire de Chimie de Coordination); 205 route de Narbonne, BP44099 31077 Toulouse Cedex 4 France
- Université de Toulouse; UPS, ICT-FR 2599 31062 Toulouse Cedex 9 France
- Engineering Research Center of Molecular Medicine, Ministry of Education, Key Laboratory of Xiamen Marine and Gene Drugs, Institutes of Molecular Medicine and School of Biomedical Sciences; Huaqiao University; Xiamen 361021 P.R. China
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20
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Zhou Y, Zhou H, Liu S, Pi D, Shen G. Water as a hydrogen source in palladium-catalyzed reduction and reductive amination of nitroarenes mediated by diboronic acid. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.05.056] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Teichmann J, Bursch M, Köstler B, Bolte M, Lerner HW, Grimme S, Wagner M. Trapping Experiments on a Trichlorosilanide Anion: a Key Intermediate of Halogenosilane Chemistry. Inorg Chem 2017; 56:8683-8688. [DOI: 10.1021/acs.inorgchem.7b00216] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Julian Teichmann
- Institut für
Anorganische Chemie, Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße
7, 60438 Frankfurt
am Main, Germany
| | - Markus Bursch
- Mulliken Center for Theoretical
Chemistry, Institut für Physikalische und Theoretische Chemie, Universität Bonn, Beringstraße 4, 53115 Bonn, Germany
| | - Benedikt Köstler
- Institut für
Anorganische Chemie, Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße
7, 60438 Frankfurt
am Main, Germany
| | - Michael Bolte
- Institut für
Anorganische Chemie, Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße
7, 60438 Frankfurt
am Main, Germany
| | - Hans-Wolfram Lerner
- Institut für
Anorganische Chemie, Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße
7, 60438 Frankfurt
am Main, Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical
Chemistry, Institut für Physikalische und Theoretische Chemie, Universität Bonn, Beringstraße 4, 53115 Bonn, Germany
| | - Matthias Wagner
- Institut für
Anorganische Chemie, Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße
7, 60438 Frankfurt
am Main, Germany
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22
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Brenna D, Porta R, Massolo E, Raimondi L, Benaglia M. A New Class of Low-Loading Catalysts for Highly Enantioselective, Metal-Free Imine Reduction of Wide General Applicability. ChemCatChem 2017. [DOI: 10.1002/cctc.201700052] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Davide Brenna
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi, 19 20133 Milano Italy
| | - Riccardo Porta
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi, 19 20133 Milano Italy
| | - Elisabetta Massolo
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi, 19 20133 Milano Italy
| | - Laura Raimondi
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi, 19 20133 Milano Italy
| | - Maurizio Benaglia
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi, 19 20133 Milano Italy
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23
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Porta R, Puglisi A, Colombo G, Rossi S, Benaglia M. Continuous-flow synthesis of primary amines: Metal-free reduction of aliphatic and aromatic nitro derivatives with trichlorosilane. Beilstein J Org Chem 2016; 12:2614-2619. [PMID: 28144331 PMCID: PMC5238609 DOI: 10.3762/bjoc.12.257] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 11/23/2016] [Indexed: 11/23/2022] Open
Abstract
The metal-free reduction of nitro compounds to amines mediated by trichlorosilane was successfully performed for the first time under continuous-flow conditions. Aromatic as well as aliphatic nitro derivatives were converted to the corresponding primary amines in high yields and very short reaction times with no need for purification. The methodology was also extended to the synthesis of two synthetically relevant intermediates (precursors of baclofen and boscalid).
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Affiliation(s)
- Riccardo Porta
- Dipartimento di Chimica, Università di Milano, Via Golgi 19, 20133, Milano, Italy
| | - Alessandra Puglisi
- Dipartimento di Chimica, Università di Milano, Via Golgi 19, 20133, Milano, Italy
| | - Giacomo Colombo
- Dipartimento di Chimica, Università di Milano, Via Golgi 19, 20133, Milano, Italy
| | - Sergio Rossi
- Dipartimento di Chimica, Università di Milano, Via Golgi 19, 20133, Milano, Italy
| | - Maurizio Benaglia
- Dipartimento di Chimica, Università di Milano, Via Golgi 19, 20133, Milano, Italy
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24
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Moxter M, Tillmann J, Füser M, Bolte M, Lerner HW, Wagner M. Tetraarylethylenes from Diarylmethanones and Hexachlorodisilane: The "Sila-McMurry" Reaction. Chemistry 2016; 22:16028-16031. [PMID: 27690327 DOI: 10.1002/chem.201603720] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Indexed: 11/09/2022]
Abstract
Hexachlorodisilane reacts with diarylmethanones (aryl=C6 H5 , 4-MeC6 H4 , 4-tBuC6 H4 , 4-ClC6 H4 , 4-BrC6 H4 ) to furnish the corresponding tetraarylethylenes in good yields. The reductive conversion requires temperatures of about 160 °C and reaction times of 60-72 h. In the initial step, the Lewis-basic carbonyl groups likely generate low-valent [SiCl2 ] as an analogue of [TiCl2 ] in the classical McMurry reaction. The coupling sequence further proceeds via benzopinacolones, which have been isolated as key intermediates.
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Affiliation(s)
- Maximilian Moxter
- Institut für Anorganische Chemie, Goethe Universität Frankfurt, Max-von-Laue-Straße 7, 60438, Frankfurt am Main, Germany
| | - Jan Tillmann
- Institut für Anorganische Chemie, Goethe Universität Frankfurt, Max-von-Laue-Straße 7, 60438, Frankfurt am Main, Germany
| | - Matthias Füser
- Institut für Anorganische Chemie, Goethe Universität Frankfurt, Max-von-Laue-Straße 7, 60438, Frankfurt am Main, Germany
| | - Michael Bolte
- Institut für Anorganische Chemie, Goethe Universität Frankfurt, Max-von-Laue-Straße 7, 60438, Frankfurt am Main, Germany
| | - Hans-Wolfram Lerner
- Institut für Anorganische Chemie, Goethe Universität Frankfurt, Max-von-Laue-Straße 7, 60438, Frankfurt am Main, Germany
| | - Matthias Wagner
- Institut für Anorganische Chemie, Goethe Universität Frankfurt, Max-von-Laue-Straße 7, 60438, Frankfurt am Main, Germany.
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25
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Schweizer JI, Meyer L, Nadj A, Diefenbach M, Holthausen MC. Unraveling the Amine-Induced Disproportionation Reaction of Perchlorinated Silanes-A DFT Study. Chemistry 2016; 22:14328-35. [PMID: 27529545 DOI: 10.1002/chem.201602724] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Julia I. Schweizer
- Institut für Anorganische Chemie; Goethe-Universität; Max-von-Laue-Straße 7 60438 Frankfurt/Main Germany
| | - Lioba Meyer
- Institut für Anorganische Chemie; Goethe-Universität; Max-von-Laue-Straße 7 60438 Frankfurt/Main Germany
| | - Andor Nadj
- Institut für Anorganische Chemie; Goethe-Universität; Max-von-Laue-Straße 7 60438 Frankfurt/Main Germany
| | - Martin Diefenbach
- Institut für Anorganische Chemie; Goethe-Universität; Max-von-Laue-Straße 7 60438 Frankfurt/Main Germany
| | - Max C. Holthausen
- Institut für Anorganische Chemie; Goethe-Universität; Max-von-Laue-Straße 7 60438 Frankfurt/Main Germany
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26
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Orlandi M, Brenna D, Harms R, Jost S, Benaglia M. Recent Developments in the Reduction of Aromatic and Aliphatic Nitro Compounds to Amines. Org Process Res Dev 2016. [DOI: 10.1021/acs.oprd.6b00205] [Citation(s) in RCA: 197] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Manuel Orlandi
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
| | - Davide Brenna
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
| | - Reentje Harms
- DexLeChem GmbH, c/o CoLaborator, Building S141, Muellerstr. 178, 13353 Berlin, Germany
| | - Sonja Jost
- DexLeChem GmbH, c/o CoLaborator, Building S141, Muellerstr. 178, 13353 Berlin, Germany
| | - Maurizio Benaglia
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
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27
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Porwal D, Oestreich M. B(C6F5)3-Catalyzed Reduction of Aromatic and Aliphatic Nitro Groups with Hydrosilanes. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600556] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Digvijay Porwal
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 115 10623 Berlin Germany
| | - Martin Oestreich
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 115 10623 Berlin Germany
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28
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Lu H, Geng Z, Li J, Zou D, Wu Y, Wu Y. Metal-Free Reduction of Aromatic Nitro Compounds to Aromatic Amines with B2pin2 in Isopropanol. Org Lett 2016; 18:2774-6. [DOI: 10.1021/acs.orglett.6b01274] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hongtao Lu
- The
College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450052, People’s Republic of China
| | - Zhiyue Geng
- The
College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450052, People’s Republic of China
| | - Jingya Li
- Tetranov Biopharm,
LLC. and Collaborative Innovation Center of New Drug Research and
Safety Evaluation, Zhengzhou, 450052, People’s Republic of China
| | - Dapeng Zou
- The
College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450052, People’s Republic of China
| | - Yusheng Wu
- Tetranov Biopharm,
LLC. and Collaborative Innovation Center of New Drug Research and
Safety Evaluation, Zhengzhou, 450052, People’s Republic of China
- Tetranov
International,
Inc. 100 Jersey Avenue, Suite A340, New Brunswick, New Jersey 08901, United States
| | - Yangjie Wu
- The
College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450052, People’s Republic of China
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