1
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Rithchumpon P, Intakaew N, Khamto N, Yimklan S, Nimmanpipug P, Thavornyutikarn P, Meepowpan P. Synthesis and application of methyl itaconate-anthracene adducts in configuration assignment of chiral secondary alcohols by 1H NMR. Org Biomol Chem 2021; 19:8955-8967. [PMID: 34581721 DOI: 10.1039/d1ob01387d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Novel chiral derivatising agents (CDAs) such as methyl itaconate-anthracene adducts (MIAs) were reported for the absolute configuration determination of chiral secondary alcohols by the 1H NMR technique. These adducts were facilely prepared through well-known reactions, and furthermore, commercially available starting materials. According to these synthetic routes, the desired MIAs were afforded in 6 steps with 49% overall yield from dimethyl itaconate. Moreover, the represented MIAs provided significantly large differences of chemical shift values (ΔδSR). No racemisation from the tertiary characteristics of the adjacent alpha carbon was observed.
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Affiliation(s)
- Puracheth Rithchumpon
- Department of Chemistry, Faculty of Science, Chiang Mai University, 239 Huay Kaew Road, Chiang Mai, 50200, Thailand. .,Graduate School, Chiang Mai University, 239 Huay Kaew Road, Chiang Mai 50200, Thailand
| | - Neeranuth Intakaew
- Department of Chemistry, Faculty of Science, Chiang Mai University, 239 Huay Kaew Road, Chiang Mai, 50200, Thailand. .,Graduate School, Chiang Mai University, 239 Huay Kaew Road, Chiang Mai 50200, Thailand.,Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Chiang Mai University, 239 Huay Kaew Road, Chiang Mai 50200, Thailand
| | - Nopawit Khamto
- Department of Chemistry, Faculty of Science, Chiang Mai University, 239 Huay Kaew Road, Chiang Mai, 50200, Thailand. .,Graduate School, Chiang Mai University, 239 Huay Kaew Road, Chiang Mai 50200, Thailand
| | - Saranpong Yimklan
- Department of Chemistry, Faculty of Science, Chiang Mai University, 239 Huay Kaew Road, Chiang Mai, 50200, Thailand.
| | - Piyarat Nimmanpipug
- Department of Chemistry, Faculty of Science, Chiang Mai University, 239 Huay Kaew Road, Chiang Mai, 50200, Thailand.
| | - Praput Thavornyutikarn
- Department of Chemistry, Faculty of Science, Chiang Mai University, 239 Huay Kaew Road, Chiang Mai, 50200, Thailand.
| | - Puttinan Meepowpan
- Department of Chemistry, Faculty of Science, Chiang Mai University, 239 Huay Kaew Road, Chiang Mai, 50200, Thailand. .,Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Chiang Mai University, 239 Huay Kaew Road, Chiang Mai 50200, Thailand.,Center of Excellence in Materials Science and Technology, Faculty of Science, Chiang Mai University, 239 Huay Kaew Road, Chiang Mai 50200, Thailand
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2
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Chiral Phase Transfer Catalysis in the Asymmetric Synthesis of a 3,3-Disubstituted Isoindolinone and Determination of Its Absolute Configuration by VCD Spectroscopy. MOLECULES (BASEL, SWITZERLAND) 2020; 25:molecules25102272. [PMID: 32408552 PMCID: PMC7287911 DOI: 10.3390/molecules25102272] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/06/2020] [Accepted: 05/08/2020] [Indexed: 01/15/2023]
Abstract
In this work we report our endeavors toward the development of an asymmetric synthesis of a 3,3-disubstituted isoindolinone, dimethyl 2-(1-methyl-3-oxoisoindolin-1-yl)malonate, via asymmetric cascade reaction of 2-acetylbenzonitrile with dimethylmalonate and the determination of its absolute configuration (AC) by vibrational circular dichroism (VCD). Bifunctional ammonium salts, derived from trans-1,2-cyclohexanediamine in combination with inorganic bases under phase transfer conditions, were the most effective catalytic systems, leading to the target in high yields and moderate enantioselectivity. An efficient process of heterochiral crystallization allowed the increase of the enantiopurity up to 96% ee and in an acceptable overall yield. An important aim of the present work is the comparison of different VCD methodologies for AC determination of the target compound.
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3
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Monaco G, Procida G, Di Mola A, Herrebout W, Massa A. Error bounds on goodness of fit indicators in vibrational circular dichroism spectroscopy. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2019.137000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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4
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Merten C, Golub TP, Kreienborg NM. Absolute Configurations of Synthetic Molecular Scaffolds from Vibrational CD Spectroscopy. J Org Chem 2019; 84:8797-8814. [PMID: 31046276 DOI: 10.1021/acs.joc.9b00466] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Vibrational circular dichroism (VCD) spectroscopy is one of the most powerful techniques for the determination of absolute configurations (AC), as it does not require any specific UV/vis chromophores, no chemical derivatization, and no growth of suitable crystals. In the past decade, it has become increasingly recognized by chemists from various fields of synthetic chemistry such as total synthesis and drug discovery as well as from developers of asymmetric catalysts. This perspective article gives an overview about the most important experimental aspects of a VCD-based AC determination and explains the theoretical analysis. The comparison of experimental and computational spectra that leads to the final conclusion about the AC of the target molecules is described. In addition, the review summarizes unique VCD studies carried out in the period 2008-2018 that focus on the determination of unknown ACs of new compounds, which were obtained in its enantiopure form either through direct asymmetric synthesis or chiral chromatography.
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Affiliation(s)
- Christian Merten
- Ruhr Universität Bochum , Organische Chemie II , Universitätsstraße 150 , 44780 Bochum , Germany
| | - Tino P Golub
- Ruhr Universität Bochum , Organische Chemie II , Universitätsstraße 150 , 44780 Bochum , Germany
| | - Nora M Kreienborg
- Ruhr Universität Bochum , Organische Chemie II , Universitätsstraße 150 , 44780 Bochum , Germany
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5
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Rode JE, Lyczko K, Jawiczuk M, Kawęcki R, Stańczyk W, Jaglińska A, Dobrowolski JC. The Vibrational Circular Dichroism Pattern of the ν(C=O) Bands in Isoindolinones. Chemphyschem 2018; 19:2411-2422. [DOI: 10.1002/cphc.201800244] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Joanna E. Rode
- Institute of Nuclear Chemistry and Technology 16 Dorodna Street 03-195 Warsaw Poland
| | - Krzysztof Lyczko
- Institute of Nuclear Chemistry and Technology 16 Dorodna Street 03-195 Warsaw Poland
| | - Magdalena Jawiczuk
- Institute of Organic ChemistryPolish Academy of Sciences Kasprzaka 44/52 01-224 Warsaw Poland
- Current address: Centre of New TechnologiesUniversity of Warsaw Banacha 2C 02-097 Warszawa Poland
| | - Robert Kawęcki
- Siedlce University, Faculty of Science 3 Maja Street No 54 08-110 Siedlce Poland
| | - Wojciech Stańczyk
- Siedlce University, Faculty of Science 3 Maja Street No 54 08-110 Siedlce Poland
| | - Agnieszka Jaglińska
- Siedlce University, Faculty of Science 3 Maja Street No 54 08-110 Siedlce Poland
| | - Jan Cz. Dobrowolski
- Institute of Nuclear Chemistry and Technology 16 Dorodna Street 03-195 Warsaw Poland
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6
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Canzi EF, dos Santos FM, Meneghetti EK, Sales Maia BHL, Batista JM. Absolute configuration of a rare dibenzoylmethane derivative from Dahlstedtia glaziovii (Fabaceae). Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2017.12.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Szymkowiak J, Kwit M. Electronic and vibrational exciton coupling in oxidized trianglimines. Chirality 2017; 30:117-130. [PMID: 29110336 DOI: 10.1002/chir.22783] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 08/09/2017] [Accepted: 10/05/2017] [Indexed: 01/10/2023]
Abstract
Readily available chiral trianglimine and their (poly)oxygenated congeners represent a unique class of macrocyclic rigid compounds optimal for testing electronic and vibrational circular dichroism exciton chirality methods. Electronic and vibrational circular dichroism spectra of such trianglimines are strongly affected by polar substituents in macrocycle skeletons. Double substitution by OH groups in each aromatic fragment of the macrocycle causes sign reversal of the exciton couplet in the region of the strongest UV absorption. On the other hand, electronic circular dichroism spectrum of the macrocycle having 2 methoxy groups shows 2 exciton couplets-the long-wavelength positive and the second of the negative sign, observed at the shorter wavelengths. VCD spectra of macrocyclic imines show vibrational exciton couplets in the region of strong C=N stretches. The signs of these couplets are positive and the opposite of the diamine chirality. For trianglimine macrocycles the interpretation of VCD spectra in terms of excitons is much more convincing than for electronic circular dichroism spectra. By contrast, trans-1,2-diaminocyclohexane-based vicinal diimines, being a one-third of the respective macrocycle, do not exhibit any vibrational exciton effect. Experimental data were confronted with DFT calculations. We observed good-to-excellent agreement between experimental and computed data.
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Affiliation(s)
- Joanna Szymkowiak
- Department of Chemistry, Adam Mickiewicz University, Poznan, Poland.,Wielkopolska Center for Advanced Technologies (WCAT), Poznan, Poland
| | - Marcin Kwit
- Department of Chemistry, Adam Mickiewicz University, Poznan, Poland.,Wielkopolska Center for Advanced Technologies (WCAT), Poznan, Poland
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8
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Determination of the absolute configuration of a novel tetrasubstituted isoindolinone by vibrational circular dichroism. J Pharm Biomed Anal 2017; 144:52-58. [DOI: 10.1016/j.jpba.2017.05.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 03/30/2017] [Accepted: 05/04/2017] [Indexed: 12/21/2022]
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9
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Burgueño-Tapia E, Joseph-Nathan P. Vibrational Circular Dichroism: Recent Advances for the Assignment of the Absolute Configuration of Natural Products. Nat Prod Commun 2017. [DOI: 10.1177/1934578x1701200501] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Vibrational circular dichroism (VCD) emerged during the last decade as a reliable tool for the absolute configuration (AC) determination of organic compounds. The principles, instrumentation, and methodology applied prior to early 2013 were recently reviewed by us. Since VCD is a very dynamic field, the aim of this review is to update VCD advances for the AC assignment of terpenoids, aromatic compounds, alkaloids, and other natural products for the 2013–2014 period, when VCD was applied to the AC assignment of some 70 natural products. In addition, although discovered in 2012, a brief introduction to the VCD exciton coupling approach and its applications in natural products AC assignment is presented.
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Affiliation(s)
- Eleuterio Burgueño-Tapia
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala, Col. Santo Tomás, México D.F., 11340 Mexico
| | - Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14–740, México D.F., 07000 Mexico
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10
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Monaco G, Aquino F, Zanasi R, Herrebout W, Bultinck P, Massa A. Model-averaging of ab initio spectra for the absolute configuration assignment via vibrational circular dichroism. Phys Chem Chem Phys 2017; 19:28028-28036. [DOI: 10.1039/c7cp05358d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Unescapable errors of calculations are taken into account through a model-averaging technique, opening the way to a quantitative comparison with experiment.
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Affiliation(s)
- Guglielmo Monaco
- Department of Chemistry and Biology “A. Zambelli”
- University of Salerno
- Via G. Paolo II
- 132
- Fisciano 84084
| | - Francesco Aquino
- Department of Chemistry and Biology “A. Zambelli”
- University of Salerno
- Via G. Paolo II
- 132
- Fisciano 84084
| | - Riccardo Zanasi
- Department of Chemistry and Biology “A. Zambelli”
- University of Salerno
- Via G. Paolo II
- 132
- Fisciano 84084
| | | | - Patrick Bultinck
- Department of Inorganic and Physical Chemistry
- Ghent University
- Belgium
| | - Antonio Massa
- Department of Chemistry and Biology “A. Zambelli”
- University of Salerno
- Via G. Paolo II
- 132
- Fisciano 84084
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11
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Mazzeo G, Abbate S, Longhi G, Castiglioni E, Boiadjiev SE, Lightner DA. pH Dependent Chiroptical Properties of (1R,2R)- and (1S,2S)-trans-Cyclohexane Diesters and Diamides from VCD, ECD, and CPL Spectroscopy. J Phys Chem B 2016; 120:2380-7. [DOI: 10.1021/acs.jpcb.5b11223] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giuseppe Mazzeo
- Dipartimento
di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Sergio Abbate
- Dipartimento
di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
- CNISM, Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Via della Vasca
Navale, 84, 00146 Roma, Italy
| | - Giovanna Longhi
- Dipartimento
di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
- CNISM, Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Via della Vasca
Navale, 84, 00146 Roma, Italy
| | - Ettore Castiglioni
- Dipartimento
di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
- JASCO Europe, Via Cadorna 1, 23894 Cremella, LC, Italy
| | - Stefan E. Boiadjiev
- Department
of Chemistry and Biochemistry, Medical University-Pleven, 1 St. Kl. Ohridski Str., 5800 Pleven, Bulgaria
| | - David A. Lightner
- Department
of Chemistry, University of Nevada, Reno, Nevada 89557-0020, United States
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12
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Di Mola A, Tiffner M, Scorzelli F, Palombi L, Filosa R, De Caprariis P, Waser M, Massa A. Bifunctional phase-transfer catalysis in the asymmetric synthesis of biologically active isoindolinones. Beilstein J Org Chem 2015; 11:2591-9. [PMID: 26734105 PMCID: PMC4685908 DOI: 10.3762/bjoc.11.279] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 12/02/2015] [Indexed: 12/13/2022] Open
Abstract
New bifunctional chiral ammonium salts were investigated in an asymmetric cascade synthesis of a key building block for a variety of biologically relevant isoindolinones. With this chiral compound in hand, the development of further transformations allowed for the synthesis of diverse derivatives of high pharmaceutical value, such as the Belliotti (S)-PD172938 and arylated analogues with hypnotic sedative activity, obtained in good overall total yield (50%) and high enantiomeric purity (95% ee). The synthetic routes developed herein are particularly convenient in comparison with the current methods available in literature and are particularly promising for large scale applications.
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Affiliation(s)
- Antonia Di Mola
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II, 132, 84084-Fisciano, SA, Italy
- Dipartimento di Farmacia, Università di Salerno, Via Giovanni Paolo II, 132, 84084-Fisciano, SA, Italy
| | - Maximilian Tiffner
- Institute of Organic Chemistry, Johannes Kepler University Linz Altenbergerstraße 69, 4040 Linz, Austria
| | - Francesco Scorzelli
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II, 132, 84084-Fisciano, SA, Italy
| | - Laura Palombi
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II, 132, 84084-Fisciano, SA, Italy
| | - Rosanna Filosa
- Dipartimento di Medicina Sperimentale, Università di Napoli, Napoli, Italy
| | - Paolo De Caprariis
- Dipartimento di Farmacia, Università di Salerno, Via Giovanni Paolo II, 132, 84084-Fisciano, SA, Italy
| | - Mario Waser
- Institute of Organic Chemistry, Johannes Kepler University Linz Altenbergerstraße 69, 4040 Linz, Austria
| | - Antonio Massa
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II, 132, 84084-Fisciano, SA, Italy
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13
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Meninno S, Rizzo P, Abbate S, Longhi G, Mazzeo G, Monaco G, Lattanzi A, Zanasi R. Absolute Configuration Assignment of a Paraconic Acid Derivative via Vibrational Circular Dichroism Spectroscopy and Density Functional Theory Calculation. Chirality 2015; 28:110-5. [DOI: 10.1002/chir.22553] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 10/27/2015] [Accepted: 10/28/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Sara Meninno
- Dipartimento di Chimica e Biologia “Adolfo Zambelli”; Università degli Studi Salerno; Fisciano (SA) Italy
| | - Paola Rizzo
- Dipartimento di Chimica e Biologia “Adolfo Zambelli”; Università degli Studi Salerno; Fisciano (SA) Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale; Università degli Studi di Brescia; Brescia Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale; Università degli Studi di Brescia; Brescia Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale; Università degli Studi di Brescia; Brescia Italy
| | - Guglielmo Monaco
- Dipartimento di Chimica e Biologia “Adolfo Zambelli”; Università degli Studi Salerno; Fisciano (SA) Italy
| | - Alessandra Lattanzi
- Dipartimento di Chimica e Biologia “Adolfo Zambelli”; Università degli Studi Salerno; Fisciano (SA) Italy
| | - Riccardo Zanasi
- Dipartimento di Chimica e Biologia “Adolfo Zambelli”; Università degli Studi Salerno; Fisciano (SA) Italy
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14
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Burgueño-Tapia E, Joseph-Nathan P. Vibrational Circular Dichroism: Recent Advances for the Assignment of the Absolute Configuration of Natural Products. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501001036] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Vibrational circular dichroism (VCD) emerged during the last decade as a reliable tool for the absolute configuration (AC) determination of organic compounds. The principles, instrumentation, and methodology applied prior to early 2013 were recently reviewed by us. Since VCD is a very dynamic field, the aim of this review is to update VCD advances for the AC assignment of terpenoids, aromatic compounds, alkaloids, and other natural products for the 2013-2014 period, when VCD was applied to the AC assignment of some 70 natural products. In addition, although discovered in 2012, a brief introduction to the VCD exciton coupling approach and its applications in natural products AC assignment is presented.
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Affiliation(s)
- Eleuterio Burgueño-Tapia
- Departamento de Quimica Orgdnica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico National, Prolongatión de Carpio y Plan de Ayala, Col. Santo Tomás, México D.F., 11340 Mexico
| | - Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigatión y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México D.F., 07000 Mexico
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15
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Cordero-Rivera RE, Meléndez-Rodríguez M, Suárez-Castillo OR, Bautista-Hernández CI, Trejo-Carbajal N, Cruz-Borbolla J, Castelán-Duarte LE, Morales-Ríos MS, Joseph-Nathan P. Formal synthesis of (−)-flustramine B and its absolute configuration assignment by vibrational circular dichroism exciton chirality. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.05.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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16
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Buendía-Trujillo AI, Torrres-Valencia JM, Joseph-Nathan P, Burgueño-Tapia E. Absolute Configuration Assignment of 3′,4′-di-O-acylkhellactones Using Vibrational Circular Dichroism Exciton Chirality. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501000658] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The 3′R,4 ‘R absolute configuration (AC) of the angular-type pyranocoumarins (-)-3′,4′-di- O-acetylkhellactone (2), (-)-4′- O-acetyl-3′- O-angeloylkhellactone (3), (+)-3′- O-acetyl-4- O-isobutyroylkhellactone (4), and (-)-3′- O-angeloyl-4′- O-senecioylkhellactone (5), isolated from the aerial parts of Prionosciadum thapsoides, was assigned by vibrational circular dichroism exciton chirality (VCDEC), and confirmed by comparison of their VCD frequencies with those calculated using DFT at the B3LYP/DGDZVP level. This again reveals that AC assignments based on optical rotation data are not very confident. Evaluation of Flack and Hooft parameters obtained after single-crystal X-ray diffraction analysis of 3, independently confirmed this AC.
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Affiliation(s)
- Abigail I. Buendía-Trujillo
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala, Col. Santo Tomás, México D.F. 11340, Mexico
| | - J. Martín Torrres-Valencia
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo, km 4.5 Carretera Pachuca-Tulancingo, Mineral de la Reforma, Hidalgo 42184, Mexico
| | - Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14–740, México, D.F. 07000, Mexico
| | - Eleuterio Burgueño-Tapia
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala, Col. Santo Tomás, México D.F. 11340, Mexico
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17
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Isoindolinones as Michael Donors under Phase Transfer Catalysis: Enantioselective Synthesis of Phthalimidines Containing a Tetrasubstituted Carbon Stereocenter. Molecules 2015; 20:8484-98. [PMID: 25985353 PMCID: PMC6272520 DOI: 10.3390/molecules20058484] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 05/04/2015] [Accepted: 05/06/2015] [Indexed: 11/30/2022] Open
Abstract
Readily available chiral ammonium salts derived from cinchona alkaloids have proven to be effective phase transfer catalysts in the asymmetric Michael reaction of 3-substituted isoindolinones. This protocol provides a convenient method for the construction of valuable asymmetric 3,3-disubstituted isoindolinones in high yields and moderate to good enantioselectivity. Diastereoselectivity was also investigated in the construction of contiguous tertiary and quaternary stereocenters. The use of acrolein as Michael acceptor led to an interesting tricyclic derivative, a pyrroloisoindolinone analogue, via a tandem conjugated addition/cyclization reaction.
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18
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Abbate S, Mazzeo G, Meneghini S, Longhi G, Boiadjiev SE, Lightner DA. Bicamphor: a prototypic molecular system to investigate vibrational excitons. J Phys Chem A 2015; 119:4261-7. [PMID: 25871493 DOI: 10.1021/acs.jpca.5b02332] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Vibrational circular dichroism (VCD) and IR spectra have been recorded in the fingerprint and carbonyl stretching regions for endo,endo-bicamphor (1), exo,exo-bicamphor (2), endo,exo-bicamphor (3), 3,3'-bicamphorylidene (4), and exo,exo-bis-thiocamphor (5). The C2 symmetry possessed by these molecular systems (except in one case), as well as their limited conformational mobility associated with well-defined degrees of freedom, allow for optimal test of the vibrational circular dichroism exciton chirality (VCDEC) rule introduced by Taniguchi and Monde. Density functional theory calculations are employed not only to predict the entire aspect of the VCD and IR spectra but also to study how the VCDEC rule may be impacted by the coupling between C═O stretchings and from C═O stretchings with other vibrational modes and by the rotation about the C-C bond connecting the two camphors. Comments are provided about the limitations and potentialities of the VCDEC method and about the manifestation of different vibrational excitons in other regions of the VCD spectra, either in the mid-IR or in the CH-stretching regions.
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Affiliation(s)
- Sergio Abbate
- †Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy.,‡CNISM Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia,Via della Vasca Navale, 84, 00146 Roma, Italy
| | - Giuseppe Mazzeo
- †Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Silvia Meneghini
- †Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy.,§Dipartimento di Scienze del Farmaco, viale Taramelli 12, Università di Pavia, 27100 Pavia, Italy
| | - Giovanna Longhi
- †Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy.,‡CNISM Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia,Via della Vasca Navale, 84, 00146 Roma, Italy
| | - Stefan E Boiadjiev
- ∥Department of Chemistry and Biochemistry, Medical University-Pleven, 1 St. Kl. Ohridski Str., 5800 Pleven, Bulgaria
| | - David A Lightner
- ⊥Department of Chemistry, University of Nevada, 1664 North Virginia Street, Reno, Nevada 89557-0020, United States
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Sánchez-Castellanos M, Bucio MA, Hernández-Barragán A, Joseph-Nathan P, Cuevas G, Quijano L. Vibrational Circular Dichroism (VCD), VCD Exciton Coupling, and X-ray Determination of the Absolute Configuration of an α
,β
-Unsaturated Germacranolide. Chirality 2015; 27:247-52. [DOI: 10.1002/chir.22420] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Accepted: 12/04/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Mariano Sánchez-Castellanos
- Instituto de Química; Universidad Nacional Autónoma de México; Circuito Exterior, Ciudad Universitaria 04510 México D.F. Mexico
| | - María A. Bucio
- Departamento de Química; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional; Apartado 14-740 México D.F., 07000 Mexico
| | - Angelina Hernández-Barragán
- Departamento de Química; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional; Apartado 14-740 México D.F., 07000 Mexico
| | - Pedro Joseph-Nathan
- Departamento de Química; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional; Apartado 14-740 México D.F., 07000 Mexico
| | - Gabriel Cuevas
- Instituto de Química; Universidad Nacional Autónoma de México; Circuito Exterior, Ciudad Universitaria 04510 México D.F. Mexico
| | - Leovigildo Quijano
- Instituto de Química; Universidad Nacional Autónoma de México; Circuito Exterior, Ciudad Universitaria 04510 México D.F. Mexico
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20
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Shi D, Li J, Liu M, Zhang Q. CoCl2•6H2O-Promoted Pinner-Dimroth Tandem Reaction: Facile Synthesis of 3-Substituted Isoindolinones. HETEROCYCLES 2015. [DOI: 10.3987/com-15-13247] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Tiso S, Massa A. Chiral Phase Transfer Catalysts for the Synthesis of ChiralN-HeterocyclesviaAsymmetric Cascade Reactions. J Heterocycl Chem 2014. [DOI: 10.1002/jhet.2170] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Silvia Tiso
- Dipartimento di Chimica e Biologia; Università di Salerno; Via Giovanni Paolo II, 132 84084 Fisciano SA Italy
| | - Antonio Massa
- Dipartimento di Chimica e Biologia; Università di Salerno; Via Giovanni Paolo II, 132 84084 Fisciano SA Italy
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