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Duez Q, Marek L, Váňa J, Hanusek J, Roithová J. Autocatalysis in Eschenmoser Coupling Reactions. Chemistry 2023:e202303619. [PMID: 38088237 DOI: 10.1002/chem.202303619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Indexed: 12/22/2023]
Abstract
The Eschenmoser coupling reaction (ECR) of thioamides with electrophiles is believed to proceed via thiirane intermediates. However, little is known about converting the intermediates into ECR products. Previous mechanistic studies involved external thiophiles to remove the sulfur atom from the intermediates. In this work, an ECR proceeding without any thiophilic agent or base is studied by electrospray ionization-mass spectrometry. ESI-MS enables the detection of the so-far elusive polysulfide species Sn , with n ranging from 2 to 16 sulfur atoms, proposed to be the key species leading to product formation. Integrating observations from ion mobility spectrometry, ion spectroscopy, and reaction monitoring via flow chemistry coupled with mass spectrometry provides a comprehensive understanding of the reaction mechanism and uncovers the autocatalytic nature of the ECR reaction.
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Affiliation(s)
- Quentin Duez
- Institute for Molecules and Materials, Faculty of Science, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - Lukáš Marek
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ532 10, Pardubice, The Czech Republic
| | - Jiří Váňa
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ532 10, Pardubice, The Czech Republic
| | - Jiří Hanusek
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ532 10, Pardubice, The Czech Republic
| | - Jana Roithová
- Institute for Molecules and Materials, Faculty of Science, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
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2
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Marek L, Váňa J, Svoboda J, Hanusek J. Eschenmoser coupling reactions starting from primary thioamides. When do they work and when not? Beilstein J Org Chem 2023; 19:808-819. [PMID: 37346496 PMCID: PMC10280059 DOI: 10.3762/bjoc.19.61] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 05/26/2023] [Indexed: 06/23/2023] Open
Abstract
Reactions of thiobenzamide or thioacetamide with 4-bromo-1,1-dimethyl-1,4-dihydroisoquinoline-3(2H)-one, 4-bromoisoquinoline-1,3(2H,4H)-dione and two α-bromo(phenyl)acetamides were examined under various conditions (base, solvent, thiophile, temperature) and structure/medium features that influence product distribution (Eschenmoser coupling reaction, Hantzsch thiazole synthesis and elimination to nitriles) were identified. The key factor that enables the successful Eschenmoser coupling reaction involves the optimum balance in acidity of nitrogen and carbon atoms of the intermediary α-thioiminium salts.
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Affiliation(s)
- Lukáš Marek
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ532 10 Pardubice, Czech Republic
| | - Jiří Váňa
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ532 10 Pardubice, Czech Republic
| | - Jan Svoboda
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ532 10 Pardubice, Czech Republic
| | - Jiří Hanusek
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ532 10 Pardubice, Czech Republic
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3
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Secka J, Pal A, Acquah FA, Mooers BHM, Karki AB, Mahjoub D, Fakhr MK, Wallace DR, Okada T, Toyooka N, Kuta A, Koduri N, Herndon D, Roberts KP, Wang Z, Hileman B, Rajagopal N, Hussaini SR. Coupling of acceptor-substituted diazo compounds and tertiary thioamides: synthesis of enamino carbonyl compounds and their pharmacological evaluation. RSC Adv 2022; 12:19431-19444. [PMID: 35865562 PMCID: PMC9256013 DOI: 10.1039/d2ra02415b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 06/25/2022] [Indexed: 11/25/2022] Open
Abstract
This paper describes the synthesis of enamino carbonyl compounds by the copper(i)-catalyzed coupling of acceptor-substituted diazo compounds and tertiary thioamides. We plan to use this method to synthesize indolizidine (−)-237D analogs to find α6-selective antismoking agents. Therefore, we also performed in silico α6-nAchRs binding studies of selected products. Compounds with low root-mean-square deviation values showed more favorable binding free energies. We also report preliminary pharmacokinetic data on indolizidine (−)-237D and found it to have weak activity at CYP3A4. In addition, as enamino carbonyl compounds are also known for antimicrobial properties, we screened previously reported and new enamino carbonyl compounds for antibacterial, antimicrobial, and antifungal properties. Eleven compounds showed significant antimicrobial activities. This paper describes the synthesis of enamino carbonyl compounds by the copper(i)-catalyzed coupling of acceptor-substituted diazo compounds and tertiary thioamides.![]()
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Affiliation(s)
- Jim Secka
- Department of Chemistry and Biochemistry, The University of Tulsa 800 S. Tucker Drive Tulsa Oklahoma 74104 USA
| | - Arpan Pal
- Department of Chemistry and Biochemistry, The University of Tulsa 800 S. Tucker Drive Tulsa Oklahoma 74104 USA
| | - Francis A Acquah
- Department of Biochemistry and Molecular Biology, University of Oklahoma of Health Sciences Center Oklahoma City OK 73104 Unites States.,Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma Health Sciences Center Oklahoma City OK 73104 USA.,Laboratory of Biomolecular Structure and Function, University of Oklahoma of Health Sciences Center Oklahoma City OK 73104 USA
| | - Blaine H M Mooers
- Department of Biochemistry and Molecular Biology, University of Oklahoma of Health Sciences Center Oklahoma City OK 73104 Unites States.,Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma Health Sciences Center Oklahoma City OK 73104 USA.,Laboratory of Biomolecular Structure and Function, University of Oklahoma of Health Sciences Center Oklahoma City OK 73104 USA
| | - Anand B Karki
- Department of Biological Science, The University of Tulsa 800 S. Tucker Drive Tulsa Oklahoma 74104 USA
| | - Dania Mahjoub
- Department of Biological Science, The University of Tulsa 800 S. Tucker Drive Tulsa Oklahoma 74104 USA
| | - Mohamed K Fakhr
- Department of Biological Science, The University of Tulsa 800 S. Tucker Drive Tulsa Oklahoma 74104 USA
| | - David R Wallace
- Department of Pharmacology and Physiology, Oklahoma State University Center for Health Sciences Tulsa Oklahoma 74107 USA
| | - Takuya Okada
- Faculty of Engineering, University of Toyama 3190 Gofuku Toyama 930-8555 Japan
| | - Naoki Toyooka
- Faculty of Engineering, University of Toyama 3190 Gofuku Toyama 930-8555 Japan
| | - Adama Kuta
- Department of Chemistry and Biochemistry, The University of Tulsa 800 S. Tucker Drive Tulsa Oklahoma 74104 USA
| | - Naga Koduri
- Department of Chemistry and Biochemistry, The University of Tulsa 800 S. Tucker Drive Tulsa Oklahoma 74104 USA
| | - Deacon Herndon
- Department of Chemistry and Biochemistry, The University of Tulsa 800 S. Tucker Drive Tulsa Oklahoma 74104 USA
| | - Kenneth P Roberts
- Department of Chemistry and Biochemistry, The University of Tulsa 800 S. Tucker Drive Tulsa Oklahoma 74104 USA
| | - Zhiguo Wang
- Department of Chemistry and Biochemistry, The University of Tulsa 800 S. Tucker Drive Tulsa Oklahoma 74104 USA
| | - Bethany Hileman
- Department of Chemistry and Biochemistry, The University of Tulsa 800 S. Tucker Drive Tulsa Oklahoma 74104 USA
| | - Nisha Rajagopal
- Department of Chemistry and Biochemistry, The University of Tulsa 800 S. Tucker Drive Tulsa Oklahoma 74104 USA
| | - Syed R Hussaini
- Department of Chemistry and Biochemistry, The University of Tulsa 800 S. Tucker Drive Tulsa Oklahoma 74104 USA
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4
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Hansen PE, Vakili M, Kamounah FS, Spanget-Larsen J. NH Stretching Frequencies of Intramolecularly Hydrogen-Bonded Systems: An Experimental and Theoretical Study. Molecules 2021; 26:molecules26247651. [PMID: 34946735 PMCID: PMC8706864 DOI: 10.3390/molecules26247651] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/10/2021] [Accepted: 12/13/2021] [Indexed: 11/25/2022] Open
Abstract
The vibrational NH stretching transitions in secondary amines with intramolecular NH···O hydrogen bonds were investigated by experimental and theoretical methods, considering a large number of compounds and covering a wide range of stretching wavenumbers. The assignment of the NH stretching transitions in the experimental IR spectra was, in several instances, supported by measurement of the corresponding ND wavenumbers and by correlation with the observed NH proton chemical shifts. The observed wavenumbers were correlated with theoretical wavenumbers predicted with B3LYP density functional theory, using the basis sets 6-311++G(d,p) and 6-31G(d) and considering the harmonic as well as the anharmonic VPT2 approximation. Excellent correlations were established between observed wavenumbers and calculated harmonic values. However, the correlations were non-linear, in contrast to the results of previous investigations of the corresponding OH···O systems. The anharmonic VPT2 wavenumbers were found to be linearly related to the corresponding harmonic values. The results provide correlation equations for the prediction of NH stretching bands on the basis of standard B3LYP/6-311++G(d,p) and B3LYP/6-31G(d) harmonic analyses, with standard deviations close to 38 cm−1. This is significant because the full anharmonic VPT2 analysis tends to be impractical for large molecules, requiring orders of magnitude more computing time than the harmonic analysis.
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Affiliation(s)
- Poul Erik Hansen
- Department of Science and Environment, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
- Correspondence: (P.E.H.); (J.S.-L.); Tel.: +45-4674-2432 (P.E.H.); +45-4674-2710 (J.S.-L.)
| | - Mohammad Vakili
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad 91775-1436, Iran;
| | - Fadhil S. Kamounah
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark;
| | - Jens Spanget-Larsen
- Department of Science and Environment, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
- Correspondence: (P.E.H.); (J.S.-L.); Tel.: +45-4674-2432 (P.E.H.); +45-4674-2710 (J.S.-L.)
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5
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Hansen PE. A Spectroscopic Overview of Intramolecular Hydrogen Bonds of NH…O,S,N Type. Molecules 2021; 26:molecules26092409. [PMID: 33919132 PMCID: PMC8122615 DOI: 10.3390/molecules26092409] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 04/12/2021] [Accepted: 04/18/2021] [Indexed: 02/06/2023] Open
Abstract
Intramolecular NH…O,S,N interactions in non-tautomeric systems are reviewed in a broad range of compounds covering a variety of NH donors and hydrogen bond acceptors. 1H chemical shifts of NH donors are good tools to study intramolecular hydrogen bonding. However in some cases they have to be corrected for ring current effects. Deuterium isotope effects on 13C and 15N chemical shifts and primary isotope effects are usually used to judge the strength of hydrogen bonds. Primary isotope effects are investigated in a new range of magnitudes. Isotope ratios of NH stretching frequencies, νNH/ND, are revisited. Hydrogen bond energies are reviewed and two-bond deuterium isotope effects on 13C chemical shifts are investigated as a possible means of estimating hydrogen bond energies.
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Affiliation(s)
- Poul Erik Hansen
- Department of Science and Environment, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
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6
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Liu C, Li J, Chen H, Zare RN. Scale-up of microdroplet reactions by heated ultrasonic nebulization. Chem Sci 2019; 10:9367-9373. [PMID: 32110301 PMCID: PMC7017870 DOI: 10.1039/c9sc03701b] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 08/19/2019] [Indexed: 12/24/2022] Open
Abstract
Dramatically higher rates for a variety of chemical reactions have been reported in microdroplets compared with those in the liquid bulk phase. However, the scale-up of microdroplet chemical synthesis has remained a major challenge to the practical application of microdroplet chemistry. Heated ultrasonic nebulization (HUN) was found as a new way for scaling up chemical synthesis in microdroplets. Four reactions were examined, a base-catalyzed Claisen-Schmidt condensation, an oximation reaction from a ketone, a two-phase oxidation reaction without the use of a phase-transfer-catalyst, and an Eschenmoser coupling reaction. These reactions show acceleration of one to three orders of magnitude (122, 23, 6536, and 62) in HUN microdroplets compared to the same reactions in bulk solution. Then, using the present method, the scale-up of the reactions was achieved at an isolated rate of 19 mg min-1 for the product of the Claisen-Schmidt condensation, 21 mg min-1 for the synthesis of benzophenone oxime from benzophenone, 31 mg min-1 for the synthesis of 4-methoxybenzaldehyde from 4-methoxybenzyl alcohol, and 40 mg min-1 for the enaminone product of the Eschenmoser coupling reaction.
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Affiliation(s)
- Chengyuan Liu
- Department of Chemistry , Fudan University , Shanghai 200438 , China .
| | - Jia Li
- Department of Chemistry , Fudan University , Shanghai 200438 , China .
| | - Hao Chen
- Department of Chemistry & Environmental Science , New Jersey Institute of Technology , Newark , NJ 07102 , USA
| | - Richard N Zare
- Department of Chemistry , Fudan University , Shanghai 200438 , China .
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7
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Pal A, Hussaini SR. Copper-Catalyzed Coupling of Thioamides and Donor/Acceptor-Substituted Carbenoids: Synthesis of Enamino Esters and Enaminones. ACS Omega 2019; 4:269-280. [PMID: 31459329 PMCID: PMC6648369 DOI: 10.1021/acsomega.8b02633] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 12/20/2018] [Indexed: 06/10/2023]
Abstract
The coupling of thioamides and donor/acceptor-substituted diazocarbonyl compounds is reported for the first time. The present report provides a mild, catalytic method that couples thioamides and donor/acceptor-substituted diazocarbonyl compounds to form enamino esters and enaminones. Unlike traditional methods for the synthesis of enamino esters and enaminones from thioamides, both N-alkyl thioamides and thiocarbamates are suitable substrates in this coupling reaction. Copper(I) bromide catalyzes the reaction and provides enamino esters and enaminones chemo- and diastereoselectively in less time than Rh2(OAc)4 or Ru(PPh3)3Cl2 catalysts.
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8
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Veisi H, Nikseresht A, Rostami A, Hemmati S. Fe3O4@PEG core/shell nanoparticles as magnetic nanocatalyst for acetylation of amines and alcohols using ultrasound irradiations under solvent-free conditions. Res Chem Intermed 2019; 45:507-20. [DOI: 10.1007/s11164-018-3614-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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9
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Abstract
Recent studies have shown that microdroplet reactions are markedly accelerated compared to the corresponding bulk-phase reactions. This raises the question whether all reactions can be sped up by this means. We present a counter example, and we show that the reaction mechanism in microdroplets can differ sharply from that in bulk, especially because of the distinct microdroplet surface environment. This analysis helps to guide us how to choose and control reactions in microdroplets and provides a possible perspective on utilizing microdroplet chemistry to scale up synthesis.
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Affiliation(s)
- Shibdas Banerjee
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA.
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10
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Geng X, Wu X, Wang C, Zhao P, Zhou Y, Sun X, Wang LJ, Guan WJ, Wu YD, Wu AX. NaHS·nH2O-induced umpolung: the synthesis of 2-acyl-3-aminoindoles from aryl methyl ketones and 2-aminobenzonitriles. Chem Commun (Camb) 2018; 54:12730-12733. [DOI: 10.1039/c8cc07599a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient method for constructing 2-acyl-3-aminoindoles from methyl ketones and 2-aminobenzonitriles is described, in which NaHS·nH2O is used as a novel umpolung reagent for the first time in organic synthesis.
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11
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Krompiec S, Marcol B, Zych D, Kurpanik A, Danikiewicz W, Matussek M, Kuźnik N. Crown Ether Base: Highly Active, Regioselective and Reusable Catalytic Systems for Double Bond Migration in Allylic Compounds. ChemistrySelect 2017. [DOI: 10.1002/slct.201700904] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Stanisław Krompiec
- Faculty of Mathematics, Physics and Chemistry; Institute of Chemistry; University of Silesia; Szkolna 9 40-007 Katowice Poland
| | - Beata Marcol
- Faculty of Mathematics, Physics and Chemistry; Institute of Chemistry; University of Silesia; Szkolna 9 40-007 Katowice Poland
| | - Dawid Zych
- Faculty of Mathematics, Physics and Chemistry; Institute of Chemistry; University of Silesia; Szkolna 9 40-007 Katowice Poland
| | - Aneta Kurpanik
- Faculty of Mathematics, Physics and Chemistry; Institute of Chemistry; University of Silesia; Szkolna 9 40-007 Katowice Poland
| | - Witold Danikiewicz
- Institute of Organic Chemistry, Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warszawa Poland
| | - Marek Matussek
- Faculty of Mathematics, Physics and Chemistry; Institute of Chemistry; University of Silesia; Szkolna 9 40-007 Katowice Poland
| | - Nikodem Kuźnik
- Faculty of Chemistry; Silesia University of Technology; Krzywoustego 4 44-100 Gliwice Poland
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12
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Gao Y, Liu Y, Wei L, Wan J. Synthesis of enaminones containing diverse N,N-disubstitution via simple transamination: a study with sustainable catalyst-free operation. Res Chem Intermed 2017. [DOI: 10.1007/s11164-017-2946-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Pal A, Koduri ND, Wang Z, Quiroz EL, Chong A, Vuong M, Rajagopal N, Nguyen M, Roberts KP, Hussaini SR. Copper-catalyzed chemoselective cross-coupling reaction of thioamides and α-diazocarbonyl compounds: Synthesis of enaminones. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.01.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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14
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Hassan AA, Mohamed NK, El-Haleem LEA, Bräse S, Nieger M. Facile Synthesis of Naphtho[2,3- d]thiazoles, Naphtho[2,3- e][1,3,4]thiadiazines and Bis(naphtho[2,3- d]thiazolyl)copper(II) Derivatives from Heteroylthiosemicarbazides. CHINESE J CHEM 2016. [DOI: 10.1002/cjoc.201600195] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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15
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Affiliation(s)
- Ming Li
- State Key Laboratory Base
of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Xiang-Jing Kong
- State Key Laboratory Base
of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Li-Rong Wen
- State Key Laboratory Base
of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
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16
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Hussaini SR, Chamala RR, Wang Z. The Eschenmoser sulfide contraction method and its application in the synthesis of natural products. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.06.026] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Bhosale MA, Ummineni D, Sasaki T, Nishio-Hamane D, Bhanage BM. Magnetically separable γ-Fe2O3 nanoparticles: An efficient catalyst for acylation of alcohols, phenols, and amines using sonication energy under solvent free condition. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.04.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Kammel R, Tarabová D, Růžičková Z, Hanusek J. Reaction of a brominated benzolactone/lactam with 4-methoxythiobenzamide and thiourea: an Eschenmoser coupling reaction, ring transformation, or dimerization? Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.03.052] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Elliott ML, Thomas K, Kennedy S, Koduri ND, Hussaini RS, Sheaff RJ. Identification of Novel Proteasome Inhibitors from an Enaminone Library. Chem Biol Drug Des 2015; 86:322-32. [DOI: 10.1111/cbdd.12496] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 11/20/2014] [Accepted: 11/30/2014] [Indexed: 11/27/2022]
Affiliation(s)
- Megan L. Elliott
- Department of Chemistry and Biochemistry; The University of Tulsa; Keplinger Hall, 800 South Tucker Drive, Tulsa OK, 74104 USA
- College of Osteopathic Medicine; Oklahoma State University; 1111 W. 17th St. Tulsa OK, 74107 USA
| | - Kevin Thomas
- Department of Chemistry and Biochemistry; The University of Tulsa; Keplinger Hall, 800 South Tucker Drive, Tulsa OK, 74104 USA
| | - Steven Kennedy
- Department of Chemistry and Biochemistry; The University of Tulsa; Keplinger Hall, 800 South Tucker Drive, Tulsa OK, 74104 USA
- The University of Toronto Structural Genomics Consortium; 101 College St. MaRS South Tower, Suite 700 Toronto ON, M5G 1L7 Canada
| | - Naga D. Koduri
- Department of Chemistry and Biochemistry; The University of Tulsa; Keplinger Hall, 800 South Tucker Drive, Tulsa OK, 74104 USA
| | - R. Syed Hussaini
- Department of Chemistry and Biochemistry; The University of Tulsa; Keplinger Hall, 800 South Tucker Drive, Tulsa OK, 74104 USA
| | - Robert J. Sheaff
- Department of Chemistry and Biochemistry; The University of Tulsa; Keplinger Hall, 800 South Tucker Drive, Tulsa OK, 74104 USA
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20
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Huang PQ, Ou W, Ye JL. Aza-Knoevenagel-type condensation of secondary amides: direct access to N-monosubstituted β,β-difunctionalized enamines. Org Chem Front 2015. [DOI: 10.1039/c5qo00191a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
An efficient approach toN-monosubstituted β,β-difunctionalized enamines, a class of versatile building blocks for the synthesis of bioactive compounds, is reported.
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Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Wei Ou
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Jian-Liang Ye
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
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21
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Koduri ND, Wang Z, Cannell G, Cooley K, Lemma TM, Miao K, Nguyen M, Frohock B, Castaneda M, Scott H, Albinescu D, Hussaini SR. Enaminones via Ruthenium-Catalyzed Coupling of Thioamides and α-Diazocarbonyl Compounds. J Org Chem 2014; 79:7405-14. [DOI: 10.1021/jo5011312] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Naga D. Koduri
- Department
of Chemistry and Biochemistry, The University of Tulsa, Keplinger Hall, 800 South Tucker Drive, Tulsa, Oklahoma 74104, United States
| | - Zhiguo Wang
- Department
of Chemistry and Biochemistry, The University of Tulsa, Keplinger Hall, 800 South Tucker Drive, Tulsa, Oklahoma 74104, United States
| | - Garrett Cannell
- Department
of Chemistry and Biochemistry, The University of Tulsa, Keplinger Hall, 800 South Tucker Drive, Tulsa, Oklahoma 74104, United States
| | - Kate Cooley
- Department
of Chemistry and Biochemistry, The University of Tulsa, Keplinger Hall, 800 South Tucker Drive, Tulsa, Oklahoma 74104, United States
| | - Tsebaot Mesfin Lemma
- Department
of Chemistry and Biochemistry, The University of Tulsa, Keplinger Hall, 800 South Tucker Drive, Tulsa, Oklahoma 74104, United States
| | - Kun Miao
- Department
of Chemistry and Biochemistry, The University of Tulsa, Keplinger Hall, 800 South Tucker Drive, Tulsa, Oklahoma 74104, United States
| | - Michael Nguyen
- Department
of Chemistry and Biochemistry, The University of Tulsa, Keplinger Hall, 800 South Tucker Drive, Tulsa, Oklahoma 74104, United States
| | - Bram Frohock
- Department
of Chemistry and Biochemistry, The University of Tulsa, Keplinger Hall, 800 South Tucker Drive, Tulsa, Oklahoma 74104, United States
| | - Maria Castaneda
- Department
of Chemistry and Biochemistry, The University of Tulsa, Keplinger Hall, 800 South Tucker Drive, Tulsa, Oklahoma 74104, United States
| | - Halee Scott
- Department
of Chemistry and Biochemistry, The University of Tulsa, Keplinger Hall, 800 South Tucker Drive, Tulsa, Oklahoma 74104, United States
| | - Dragos Albinescu
- Department
of Natural Sciences, Science Building, Northeastern State University, 610
N. Grand Avenue, Tahlequah, Oklahoma 74464, United States
| | - Syed R. Hussaini
- Department
of Chemistry and Biochemistry, The University of Tulsa, Keplinger Hall, 800 South Tucker Drive, Tulsa, Oklahoma 74104, United States
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Huang PQ, Ou W, Xiao KJ, Wang AE. Tertiary amide-based Knoevenagel-type reactions: a direct, general, and chemoselective approach to enaminones. Chem Commun (Camb) 2014; 50:8761-3. [DOI: 10.1039/c4cc03826f] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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