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Jin J, Li C, Wang R, Xia Z, Yan Q, Wang W, Gu S, Wang H, Chen F. Chemodivergent Synthesis of Sulfonamide and Sulfones from N-Tosylhydrazones by Switching Catalyst and Temperature. Org Lett 2023; 25:6012-6017. [PMID: 37555637 DOI: 10.1021/acs.orglett.3c02151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
A catalyst- and temperature-controlled selective synthesis of sulfonamide and sulfones from N-tosylhydrazones and MBH carbonates has been developed. The use of palladium catalysts exclusively leads to sulfonamide products at room temperature, whereas the selective synthesis of sulfones is dominant for a temperature-controlled coupling reaction without palladium catalysis. Importantly, the catalyst- or temperature-controlled reaction exhibits high nucleophilicity rather than carbene reactivity in these transformations.
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Affiliation(s)
- Jingru Jin
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
- School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
| | - Chunyan Li
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
- School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
| | - Rui Wang
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
- School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
| | - Zhimin Xia
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
- School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
| | - Qiongjiao Yan
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
| | - Wei Wang
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
| | - ShuangXi Gu
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
- School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
- Key laboratory of Green Chemical Engineering Process of Ministry of Education, Wuhan 430205, China
| | - Haifeng Wang
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
- School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
- Key laboratory of Green Chemical Engineering Process of Ministry of Education, Wuhan 430205, China
| | - Fener Chen
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, Shanghai 200433, China
- Shanghai Engineering Center of Industrial Catalysis for Chiral Drugs, Shanghai 200433, China
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2
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Gant Kanegusuku AL, Roizen JL. Recent Advances in Photoredox-Mediated Radical Conjugate Addition Reactions: An Expanding Toolkit for the Giese Reaction. Angew Chem Int Ed Engl 2021; 60:21116-21149. [PMID: 33629454 PMCID: PMC8382814 DOI: 10.1002/anie.202016666] [Citation(s) in RCA: 97] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Indexed: 12/18/2022]
Abstract
Photomediated Giese reactions are at the forefront of radical chemistry, much like the classical tin-mediated Giese reactions were nearly forty years ago. With the global recognition of organometallic photocatalysts for the mild and tunable generation of carbon-centered radicals, chemists have developed a torrent of strategies to form previously inaccessible radical intermediates that are capable of engaging in intermolecular conjugate addition reactions. This Review summarizes advances in photoredox-mediated Giese reactions since 2013, with a focus on the breadth of methods that provide access to crucial carbon-centered radical intermediates that can engage in radical conjugate addition processes.
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Affiliation(s)
| | - Jennifer L Roizen
- Department of Chemistry, Duke University, Box 90346, Durham, NC, 27708-0354, USA
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3
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Gant Kanegusuku AL, Roizen JL. Recent Advances in Photoredox‐Mediated Radical Conjugate Addition Reactions: An Expanding Toolkit for the Giese Reaction. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016666] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Jennifer L. Roizen
- Department of Chemistry Duke University Box 90346 Durham NC 27708-0354 USA
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5
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Suga H, Yoshiwara M, Yamaguchi T, Bando T, Taguchi M, Inaba A, Goto Y, Kikuchi A, Itoh K, Toda Y. Enantioselective synthesis of 8-azabicyclo[3.2.1]octanes via asymmetric 1,3-dipolar cycloadditions of cyclic azomethine ylides using a dual catalytic system. Chem Commun (Camb) 2019; 55:1552-1555. [DOI: 10.1039/c8cc09224a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The asymmetric 1,3-dipolar cycloaddition between diazo imine-derived cyclic azomethine ylides and acryloylpyrazolidinone using a dual catalytic system is reported.
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Affiliation(s)
- Hiroyuki Suga
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
| | - Masahiro Yoshiwara
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
| | - Takaaki Yamaguchi
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
| | - Takashi Bando
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
| | - Mizuki Taguchi
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
| | - Ayano Inaba
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
| | - Yuichi Goto
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
| | - Ayaka Kikuchi
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
| | - Kennosuke Itoh
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University
- Tokyo 108-8641
- Japan
- Medicinal Research Laboratories, School of Pharmacy, Kitasato University
- Tokyo 108-8641
| | - Yasunori Toda
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
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6
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Shen X, Huo H, Wang C, Zhang B, Harms K, Meggers E. Octahedral Chiral-at-Metal Iridium Catalysts: Versatile Chiral Lewis Acids for Asymmetric Conjugate Additions. Chemistry 2015; 21:9720-6. [PMID: 26033287 DOI: 10.1002/chem.201500922] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Indexed: 01/10/2023]
Abstract
Octahedral iridium(III) complexes containing two bidentate cyclometalating 5-tert-butyl-2-phenylbenzoxazole (IrO) or 5-tert-butyl-2-phenylbenzothiazole (IrS) ligands in addition to two labile acetonitrile ligands are demonstrated to constitute a highly versatile class of asymmetric Lewis acid catalysts. These complexes feature the metal center as the exclusive source of chirality and serve as effective asymmetric catalysts (0.5-5.0 mol % catalyst loading) for a variety of reactions with α,β-unsaturated carbonyl compounds, namely Friedel-Crafts alkylations (94-99% ee), Michael additions with CH-acidic compounds (81-97% ee), and a variety of cycloadditions (92-99% ee with high d.r.). Mechanistic investigations and crystal structures of an iridium-coordinated substrates and iridium-coordinated products are consistent with a mechanistic picture in which the α,β-unsaturated carbonyl compounds are activated by two-point binding (bidentate coordination) to the chiral Lewis acid.
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Affiliation(s)
- Xiaodong Shen
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg (Germany)
| | - Haohua Huo
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg (Germany)
| | - Chuanyong Wang
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg (Germany)
| | - Bo Zhang
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg (Germany)
| | - Klaus Harms
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg (Germany)
| | - Eric Meggers
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg (Germany). .,College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, (P. R. China).
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7
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Lewis acid mediated diastereoselective intermolecular radical addition/trapping with pyrazolidinone acrylimides. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.02.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Subramanian H, Jasperse CP, Sibi MP. Characterization of Brønsted Acid–Base Complexes by 19F DOSY. Org Lett 2015; 17:1429-32. [PMID: 25730425 DOI: 10.1021/acs.orglett.5b00297] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hariharaputhiran Subramanian
- Department
of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Craig P. Jasperse
- Department
of Chemistry, Minnesota State University, Moorhead, Minnesota 56563, United States
| | - Mukund P. Sibi
- Department
of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108, United States
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9
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Kumar I, Ramaraju P, Mir NA, Singh A. Linear dialdehydes as promising substrates for aminocatalyzed transformations. Org Biomol Chem 2015; 13:1280-93. [DOI: 10.1039/c4ob01805b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Linear dialdehydes: This article summarizes the recent utilization of linear dialdehydes as appropriate substrates for amine catalyzed cascade/domino transformations.
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Affiliation(s)
- Indresh Kumar
- Department of Chemistry
- Birla Institute of Technology and Science-Pilani
- India
| | - Panduga Ramaraju
- Department of Chemistry
- Birla Institute of Technology and Science-Pilani
- India
| | - Nisar A. Mir
- Department of Chemistry
- Birla Institute of Technology and Science-Pilani
- India
| | - Anoop Singh
- Department of Chemistry
- Birla Institute of Technology and Science-Pilani
- India
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10
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Gucma M, Gołębiewski WM, Krawczyk M. Application of chiral ligands: carbohydrates, nucleoside-lanthanides and other Lewis acid complexes to control regio- and stereoselectivity of the dipolar cycloaddition reactions of nitrile oxides and esters. RSC Adv 2015. [DOI: 10.1039/c4ra15975f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Enantioselectivity of the cycloaddition up to 99.8%.
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Affiliation(s)
- Mirosław Gucma
- Institute of Industrial Organic Chemistry
- 03-236 Warsaw
- Poland
| | | | - Maria Krawczyk
- Institute of Industrial Organic Chemistry
- 03-236 Warsaw
- Poland
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11
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Diastereoselective Alkyl Radical Addition to the C═N Bond in Aqueous Media for the Synthesis of Enantio-enriched Chiral Alkylamines. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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12
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Adachi S, Takeda N, Sibi MP. Evaluation of Achiral Templates with Fluxional Brønsted Basic Substituents in Enantioselective Conjugate Additions. Org Lett 2014; 16:6440-3. [DOI: 10.1021/ol503275w] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Shinya Adachi
- Department
of Chemistry and
Biochemistry, North Dakota State University, Fargo, North Dakota 58108-6050, United States
| | - Norihiko Takeda
- Department
of Chemistry and
Biochemistry, North Dakota State University, Fargo, North Dakota 58108-6050, United States
| | - Mukund P. Sibi
- Department
of Chemistry and
Biochemistry, North Dakota State University, Fargo, North Dakota 58108-6050, United States
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13
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Ma G, Deng J, Sibi MP. Fluxionally Chiral DMAP Catalysts: Kinetic Resolution of Axially Chiral Biaryl Compounds. Angew Chem Int Ed Engl 2014; 53:11818-21. [DOI: 10.1002/anie.201406684] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Indexed: 12/13/2022]
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14
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Ma G, Deng J, Sibi MP. Fluxionally Chiral DMAP Catalysts: Kinetic Resolution of Axially Chiral Biaryl Compounds. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406684] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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15
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Lewis acid-catalyzed cascade radical addition/cyclization for the synthesis of 3-substituted isoindolin-1-one derivatives. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.03.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Novak A, Štefanič M, Grošelj U, Hrast M, Kasunič M, Gobec S, Stanovnik B, Svete J. A Simple Synthesis of Polyfunctionalized 4-Aminopyrazolidin-3-ones as ‘Aza-deoxa’ Analogs ofD-Cycloserine. Helv Chim Acta 2014. [DOI: 10.1002/hlca.201300169] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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Ma G, Sibi MP. Enantioselective allylic amination of MBH carbonates catalyzed by novel chiral 4-dialkylaminopyridine catalysts. Org Chem Front 2014. [DOI: 10.1039/c4qo00210e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Grošelj U, Golobič A, Svete J, Stanovnik B. Synthesis and Transformations of Novel L
-Phenylalanine Derived Pyrazolidin-3-ones. Chirality 2013; 25:541-55. [DOI: 10.1002/chir.22166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Accepted: 02/01/2013] [Indexed: 01/11/2023]
Affiliation(s)
- Uroš Grošelj
- University of Ljubljana; Faculty of Chemistry and Chemical Technology; Aškerčeva cesta 5, P.O. Box 537 SI-1000 Ljubljana Slovenia
| | - Amalija Golobič
- University of Ljubljana; Faculty of Chemistry and Chemical Technology; Aškerčeva cesta 5, P.O. Box 537 SI-1000 Ljubljana Slovenia
| | - Jurij Svete
- University of Ljubljana; Faculty of Chemistry and Chemical Technology; Aškerčeva cesta 5, P.O. Box 537 SI-1000 Ljubljana Slovenia
- EN-FIST Centre of Excellence; Dunajska 156 SI-1000 Ljubljana Slovenia
| | - Branko Stanovnik
- University of Ljubljana; Faculty of Chemistry and Chemical Technology; Aškerčeva cesta 5, P.O. Box 537 SI-1000 Ljubljana Slovenia
- EN-FIST Centre of Excellence; Dunajska 156 SI-1000 Ljubljana Slovenia
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19
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Novak A, Testen A, Bezenšek J, Grošelj U, Hrast M, Kasunič M, Gobec S, Stanovnik B, Svete J. Synthesis of pyrazolo[1,2-a]pyrazole-based peptide mimetics. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.05.122] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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20
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Correia JTM, Rodrigues MT, Santos H, Tormena CF, Coelho F. Heterocycles from Morita–Baylis–Hillman adducts: synthesis of 5-oxopyrazolidines, arylidene-5-oxopyrazolidines, and oxo-2,5-dihydro-pyrazols. Tetrahedron 2013. [DOI: 10.1016/j.tet.2012.10.057] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Ho XH, Oh HJ, Jang HY. Multistep Organocatalysis for the Asymmetric Synthesis of Multisubstituted Aldehydes from Allylic Alcohols. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200863] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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22
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Tamborini L, Pinto A, Smith TK, Major LL, Iannuzzi MC, Cosconati S, Marinelli L, Novellino E, Lo Presti L, Wong PE, Barrett MP, De Micheli C, Conti P. Synthesis and biological evaluation of CTP synthetase inhibitors as potential agents for the treatment of African trypanosomiasis. ChemMedChem 2012; 7:1623-34. [PMID: 22865834 PMCID: PMC3744939 DOI: 10.1002/cmdc.201200304] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Indexed: 11/06/2022]
Abstract
Acivicin analogues with an increased affinity for CTP synthetase (CTPS) were designed as potential new trypanocidal agents. The inhibitory activity against CTPS can be improved by increasing molecular complexity, by inserting groups able to establish additional interactions with the binding pocket of the enzyme. This strategy has been pursued with the synthesis of α-amino-substituted analogues of Acivicin and N1-substituted pyrazoline derivatives. In general, there is direct correlation between the enzymatic activity and the in vitro anti-trypanosomal efficacy of the derivatives studied here. However, this cannot be taken as a general rule, as other important factors may play a role, notably the ability of uptake/diffusion of the molecules into the trypanosomes.
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Affiliation(s)
- L. Tamborini
- Dr. L. Tamborini, Dr. A. Pinto, Dr. M. C. Iannuzzi, Prof. C. De Micheli, Prof. P. Conti Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano Via Mangiagalli 25, 20133 Milano, Italy, Fax: +39 02 50319326
| | - A. Pinto
- Dr. L. Tamborini, Dr. A. Pinto, Dr. M. C. Iannuzzi, Prof. C. De Micheli, Prof. P. Conti Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano Via Mangiagalli 25, 20133 Milano, Italy, Fax: +39 02 50319326
| | - T. K. Smith
- Dr. T. K. Smith, Dr. L. L. Major Biomedical Science Research Complex, St Andrews, KY16 9ST, Scotland
| | - L. L. Major
- Dr. T. K. Smith, Dr. L. L. Major Biomedical Science Research Complex, St Andrews, KY16 9ST, Scotland
| | - M. C. Iannuzzi
- Dr. L. Tamborini, Dr. A. Pinto, Dr. M. C. Iannuzzi, Prof. C. De Micheli, Prof. P. Conti Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano Via Mangiagalli 25, 20133 Milano, Italy, Fax: +39 02 50319326
| | - S. Cosconati
- Dr. S. Cosconati Dipartimento di Scienze Ambientali, Seconda Università di Napoli, 81100 Caserta (Italy)
| | - L. Marinelli
- Dr. L. Marinelli, Prof. E. Novellino Dipartimento di Chimica Farmaceutica e Tossicologica, Università di Napoli “Federico II”, 80131 Napoli (Italy)
| | - E. Novellino
- Dr. L. Marinelli, Prof. E. Novellino Dipartimento di Chimica Farmaceutica e Tossicologica, Università di Napoli “Federico II”, 80131 Napoli (Italy)
| | - L. Lo Presti
- Dr. L. Lo Presti Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - P. E. Wong
- Dr. P. E. Wong, Prof. M. P. Barrett Wellcome Trust Centre of Molecular Parasitology, Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences University of Glasgow, Glasgow, G12 8TA, Scotland
| | - M. P. Barrett
- Dr. P. E. Wong, Prof. M. P. Barrett Wellcome Trust Centre of Molecular Parasitology, Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences University of Glasgow, Glasgow, G12 8TA, Scotland
| | - C. De Micheli
- Dr. L. Tamborini, Dr. A. Pinto, Dr. M. C. Iannuzzi, Prof. C. De Micheli, Prof. P. Conti Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano Via Mangiagalli 25, 20133 Milano, Italy, Fax: +39 02 50319326
| | - P. Conti
- Dr. L. Tamborini, Dr. A. Pinto, Dr. M. C. Iannuzzi, Prof. C. De Micheli, Prof. P. Conti Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano Via Mangiagalli 25, 20133 Milano, Italy, Fax: +39 02 50319326
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Tan J, Cheon CH, Yamamoto H. Catalytic asymmetric Claisen rearrangement of enolphosphonates: construction of vicinal tertiary and all-carbon quaternary centers. Angew Chem Int Ed Engl 2012; 51:8264-7. [PMID: 22821885 PMCID: PMC3517105 DOI: 10.1002/anie.201203092] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Indexed: 11/10/2022]
Abstract
A Cu-catalyzed enantioselective Claisen rearrangement of easily-accessible enolphosphonates using commercially available (R, R )-PhBOX as the chiral ligand was developed. A wide range of rearrangement products with contiguous tertiary and all carbon quaternary centers were obtained in excellent yields and stereoselectivities. The α -ketophosphonate products could be easily transformed into other functional groups in high efficiency.
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Affiliation(s)
- Jiajing Tan
- Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, IL, 60637 (USA)
| | - Cheol-Hong Cheon
- Department of Chemistry, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 136-701, (Korea)
| | - Hisashi Yamamoto
- Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, IL, 60637 (USA)
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24
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Tan J, Cheon CH, Yamamoto H. Catalytic Asymmetric Claisen Rearrangement of Enolphosphonates: Construction of Vicinal Tertiary and All-Carbon Quaternary Centers. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201203092] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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25
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Yoon HS, Ho XH, Jang J, Lee HJ, Kim SJ, Jang HY. N719 dye-sensitized organophotocatalysis: enantioselective tandem Michael addition/oxyamination of aldehydes. Org Lett 2012; 14:3272-5. [PMID: 22681592 DOI: 10.1021/ol3011858] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A remarkably efficient photosensitizer, N719 dye, was used in asymmetric tandem Michael addition/oxyamination of aldehydes, rendering α,β-substituted aldehydes in good yields with excellent levels of enantioselectivity and diastereoselectivity. This is the first report of a multiorganocatalytic reaction involving iminium catalysis and photoinduced singly occupied molecular orbital (SOMO) catalysis. This reaction is expected to expand the scope of tandem organocatalytic reactions.
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Affiliation(s)
- Hyo-Sang Yoon
- Energy Systems Research, Ajou University, Suwon, 443-749, South Korea
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26
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Matsuyama H, Seki C, Shimizu T, Hirama M, Nakano H, Uwai K, Takano N, D. M. Romauli Hutabarat N, Kohari Y, Kwon E. Highly Enantioselective Synthesis of Isoquinuclidine by Diels-Alder Reaction of 1,2-Dihydropyridine Utilizing Chiral Bisoxazoline-Cu(II) Complex. HETEROCYCLES 2012. [DOI: 10.3987/com-12-s(n)2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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27
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Regio- and stereoselective cycloadditions of (1Z,4R∗,5R∗)-1-arylmethylidene-4-benzoylamino-3-oxo-5-phenylpyrazolidin-1-ium-2-ides to methyl methacrylate. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.09.140] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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28
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Suga H, Furihata Y, Sakamoto A, Itoh K, Okumura Y, Tsuchida T, Kakehi A, Baba T. Asymmetric Cycloaddition Reactions of Diazoesters with 2-Alkenoic Acid Derivatives Catalyzed by Binaphthyldiimine–Ni(II) complexes. J Org Chem 2011; 76:7377-87. [DOI: 10.1021/jo201061f] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hiroyuki Suga
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan
| | - Yasuhisa Furihata
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan
| | - Atsushi Sakamoto
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan
| | - Kennosuke Itoh
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan
| | - Yukihisa Okumura
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan
| | - Teruko Tsuchida
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan
| | - Akikazu Kakehi
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan
| | - Toshihide Baba
- Department of Environmental Chemistry & Engineering, Interdisciplinary Graduate School of Science & Engineering, Tokyo Institute of Technology, G1-14, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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29
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Ho XH, Kang MJ, Kim SJ, Park ED, Jang HY. Green organophotocatalysis. TiO2-induced enantioselective α-oxyamination of aldehydes. Catal Sci Technol 2011. [DOI: 10.1039/c1cy00183c] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Sibi MP, Yang YH, Lee S. Tin-free enantioselective radical reactions using silanes. Org Lett 2010; 10:5349-52. [PMID: 18986157 DOI: 10.1021/ol802154d] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Readily available hexyl silane is an excellent choice as a H-atom donor and a chain carrier in Lewis acid mediated enantioselective radical reactions. Conjugate radical additions to alpha,beta-unsaturated imides at room temperature proceed in good yields and excellent enantioselectivities.
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Affiliation(s)
- Mukund P Sibi
- Department of Chemistry, North Dakota State University, Fargo, North Dakota 58105, USA.
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31
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Crowley JD, Hänni KD, Leigh DA, Slawin AMZ. Diels-Alder active-template synthesis of rotaxanes and metal-ion-switchable molecular shuttles. J Am Chem Soc 2010; 132:5309-14. [PMID: 20334379 DOI: 10.1021/ja101029u] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A synthesis of [2]rotaxanes in which Zn(II) or Cu(II) Lewis acids catalyze a Diels-Alder cycloaddition to form the axle while simultaneously acting as the template for the assembly of the interlocked molecules is described. Coordination of the Lewis acid to a multidentate endotopic 2,6-di(methyleneoxymethyl)pyridyl- or bipyridine-containing macrocycle orients a chelated dienophile through the macrocycle cavity. Lewis acid activation of the double bond causes it to react with an incoming "stoppered" diene, affording the [2]rotaxane in up to 91% yield. Unusually for an active-template synthesis, the metal binding site "lives on" in these rotaxanes. This was exploited in the synthesis of a molecular shuttle containing two different ligating sites in which the position of the macrocycle could be switched by complexation with metal ions [Zn(II) and Pd(II)] with different preferred coordination geometries.
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Affiliation(s)
- James D Crowley
- School of Chemistry, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3JJ, United Kingdom
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32
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Sibi MP, Gustafson B, Coulomb J. 3-Isoxazolidinone: A New Achiral Template for Enantioselective Transformations. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.03.541] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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33
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Duguet N, Donaldson A, Leckie SM, Douglas J, Shapland P, Brown TB, Churchill G, Slawin AM, Smith AD. Chiral relay in NHC-mediated asymmetric β-lactam synthesis I; substituent effects in NHCs derived from (1R,2R)-cyclohexane-1,2-diamine. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.03.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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34
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Bañuelos P, García JM, Gómez-Bengoa E, Herrero A, Odriozola JM, Oiarbide M, Palomo C, Razkin J. (1R)-(+)-Camphor and Acetone Derived α′-Hydroxy Enones in Asymmetric Diels−Alder Reaction: Catalytic Activation by Lewis and Brønsted Acids, Substrate Scope, Applications in Syntheses, and Mechanistic Studies. J Org Chem 2010; 75:1458-73. [DOI: 10.1021/jo9023039] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Patricia Bañuelos
- Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
| | - Jesús M. García
- Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
| | - Enrique Gómez-Bengoa
- Contribution from Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
| | - Ada Herrero
- Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
| | - José M. Odriozola
- Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
| | - Mikel Oiarbide
- Contribution from Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
| | - Claudio Palomo
- Contribution from Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
| | - Jesús Razkin
- Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
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35
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Chollet G, Didier D, Schulz E. Reusable chiral bis(oxazoline)–copper complexes immobilized by donor–acceptor interactions on insoluble organic supports. CATAL COMMUN 2010. [DOI: 10.1016/j.catcom.2009.10.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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36
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Sibi MP, Kawashima K, Stanley LM. Diels−Alder Cycloaddition Strategy for Kinetic Resolution of Chiral Pyrazolidinones. Org Lett 2009; 11:3894-7. [DOI: 10.1021/ol901504p] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mukund P. Sibi
- Department of Chemistry and Molecular Biology, North Dakota State University, NDSU Department 2735, P.O. Box 6050, Fargo, North Dakota 58108-6050
| | - Keisuke Kawashima
- Department of Chemistry and Molecular Biology, North Dakota State University, NDSU Department 2735, P.O. Box 6050, Fargo, North Dakota 58108-6050
| | - Levi M. Stanley
- Department of Chemistry and Molecular Biology, North Dakota State University, NDSU Department 2735, P.O. Box 6050, Fargo, North Dakota 58108-6050
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37
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Oppenheimer J, Johnson WL, Figueroa R, Hayashi R, Hsung RP. A Rhodium(I)-Xylyl-BINAP Catalyzed Asymmetric Ynamide-[2 + 2 + 2] Cycloaddition in the Synthesis of Optically Enriched N,O-Biaryls. Tetrahedron 2009; 65:5001-5012. [PMID: 20161177 PMCID: PMC2724680 DOI: 10.1016/j.tet.2009.03.078] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
A rhodium(I)-xylyl-BINAP catalyzed asymmetric [2 + 2 + 2] cycloaddition of achiral conjugated aryl ynamides with various diynes is described here. This asymmetric cycloaddition provides a series of structurally interesting chiral N,O-biaryls with excellent enantioselectivity along with a modest diastereoselectivity with respect to both C-C and C-N axial chirality.
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Affiliation(s)
- Jossian Oppenheimer
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705 USA
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38
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Hargaden GC, Guiry PJ. Recent Applications of Oxazoline-Containing Ligands in Asymmetric Catalysis. Chem Rev 2009; 109:2505-50. [DOI: 10.1021/cr800400z] [Citation(s) in RCA: 425] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gráinne C. Hargaden
- Centre for Synthesis and Chemical Biology, School of Chemistry and Chemical Biology, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin 4, Ireland
| | - Patrick J. Guiry
- Centre for Synthesis and Chemical Biology, School of Chemistry and Chemical Biology, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin 4, Ireland
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39
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Zhang Y, Lukacova V, Bartus V, Nie X, Sun G, Manivannan E, Ghorpade SR, Jin X, Manyem S, Sibi MP, Cook GR, Balaz S. Binding of matrix metalloproteinase inhibitors to extracellular matrix: 3D-QSAR analysis. Chem Biol Drug Des 2009; 72:237-48. [PMID: 18844670 DOI: 10.1111/j.1747-0285.2008.00710.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Binding to the extracellular matrix, one of the most abundant human protein complexes, significantly affects drug disposition. Specifically, the interactions with extracellular matrix determine the free concentrations of small molecules acting in tissues, including signaling peptides, inhibitors of tissue remodeling enzymes such as matrix metalloproteinases, and other drug candidates. The nature of extracellular matrix binding was elucidated for 63 matrix metalloproteinase inhibitors, for which the association constants to an extracellular matrix mimic were reported here. The data did not correlate with lipophilicity as a common determinant of structure-nonspecific, orientation-averaged binding. A hypothetical structure of the binding site of the solidified extracellular matrix surrogate was analyzed using the Comparative Molecular Field Analysis, which needed to be applied in our multi-mode variant. This fact indicates that the compounds bind to extracellular matrix in multiple modes, which cannot be considered as completely orientation-averaged and exhibit structural dependence. The novel comparative molecular field analysis models, exhibiting satisfactory descriptive and predictive abilities, are suitable for prediction of the extracellular matrix binding for the untested chemicals, which are within applicability domains. The results contribute to a better prediction of the pharmacokinetic parameters such as the distribution volume and the tissue-blood partition coefficients, in addition to a more imminent benefit for the development of more effective matrix metalloproteinase inhibitors.
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Affiliation(s)
- Yufen Zhang
- Department of Pharmaceutical Sciences and Center for Protease Research, North Dakota State University, Fargo, ND 58105, USA
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40
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Pezdirc L, Stanovnik B, Svete J. Copper(I) Iodide-Catalyzed Cycloadditions of (1Z,4R*,5R*)-4-Benzamido-5-phenylpyrazolidin-3-on-1-azomethine Imines to Ethyl Propiolate. Aust J Chem 2009. [DOI: 10.1071/ch09074] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Regioselective copper(i) iodide-catalyzed cycloadditions of chiral pyrazolidin-3-on-1-azomethine imines 3a–j to ethyl propiolate 4 gave cycloadducts 5a–h and 5′i and 5/5′j as single regioisomers. In terms of facial selectivity, cycloadducts 5a–h and 5′i were obtained as single diastereomers, whereas the reaction of dipole 3j was less selective and gave a mixture of 5j and 5′j in a ratio of 15:85. Stereoselectivity of copper(i) iodide-catalyzed cycloadditions of ethyl propiolate 4 to azomethine imines 3 was controlled by the stereodirecting phenyl group at position 5 and by the ortho-substituents at the 1′–Ar residue.
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41
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Suga H, Adachi Y, Fujimoto K, Furihata Y, Tsuchida T, Kakehi A, Baba T. Asymmetric 1,3-Dipolar Cycloaddition Reactions of Nitrile Oxides Catalyzed by Chiral Binaphthyldiimine-Ni(II) Complexes. J Org Chem 2008; 74:1099-113. [DOI: 10.1021/jo802392c] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Hiroyuki Suga
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan, and Department of Environmental Chemistry and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, G1-14, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Yuki Adachi
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan, and Department of Environmental Chemistry and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, G1-14, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Kouhei Fujimoto
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan, and Department of Environmental Chemistry and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, G1-14, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Yasuhisa Furihata
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan, and Department of Environmental Chemistry and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, G1-14, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Teruko Tsuchida
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan, and Department of Environmental Chemistry and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, G1-14, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Akikazu Kakehi
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan, and Department of Environmental Chemistry and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, G1-14, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Toshihide Baba
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan, and Department of Environmental Chemistry and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, G1-14, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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42
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Linder D, Buron F, Constant S, Lacour J. Enantioselective CpRu-Catalyzed Carroll Rearrangement - Ligand and Metal Source Importance. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800854] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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43
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Affiliation(s)
- Sébastien Reymond
- Laboratoire de Chimie Organique,
ESPCI ParisTech, CNRS, 10 Rue
Vauquelin, 75231 Paris Cedex 05, France
| | - Janine Cossy
- Laboratoire de Chimie Organique,
ESPCI ParisTech, CNRS, 10 Rue
Vauquelin, 75231 Paris Cedex 05, France
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44
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Austeri M, Linder D, Lacour J. Enantioselective and Regioselective Ruthenium‐Catalyzed Decarboxylative Etherification of Allyl Aryl Carbonates. Chemistry 2008; 14:5737-41. [DOI: 10.1002/chem.200800619] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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45
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Sibi MP, Rane D, Stanley LM, Soeta T. Copper(II)-catalyzed exo and enantioselective cycloadditions of azomethine imines. Org Lett 2008; 10:2971-4. [PMID: 18549218 DOI: 10.1021/ol800904t] [Citation(s) in RCA: 104] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A strategy for exo and enantioselective 1,3-dipolar cycloaddition of azomethine imines to 2-acryloyl-3-pyrazolidinone is described. The corresponding cycloadducts are isolated with high diastereoselectivities (up to >96:4 exo/endo) and enantioselectivities (up to 98% ee).
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Affiliation(s)
- Mukund P Sibi
- Department of Chemistry, North Dakota State University, Fargo, North Dakota 58105, USA.
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46
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Choi S, Kang TY, Choi KW, Han S, Ahn DS, Baek SJ, Kim SK. Ionization Spectroscopy of Conformational Isomers of Propanal: The Origin of the Conformational Preference. J Phys Chem A 2008; 112:5060-3. [DOI: 10.1021/jp800775s] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sunyoung Choi
- Department of Chemistry and School of Molecular Science (BK21), KAIST, Daejeon (301-750), Republic of Korea
| | - Tae Yeon Kang
- Department of Chemistry and School of Molecular Science (BK21), KAIST, Daejeon (301-750), Republic of Korea
| | - Kyo-Won Choi
- Department of Chemistry and School of Molecular Science (BK21), KAIST, Daejeon (301-750), Republic of Korea
| | - Songhee Han
- Department of Chemistry and School of Molecular Science (BK21), KAIST, Daejeon (301-750), Republic of Korea
| | - Doo-Sik Ahn
- Department of Chemistry and School of Molecular Science (BK21), KAIST, Daejeon (301-750), Republic of Korea
| | - Sun Jong Baek
- Department of Chemistry and School of Molecular Science (BK21), KAIST, Daejeon (301-750), Republic of Korea
| | - Sang Kyu Kim
- Department of Chemistry and School of Molecular Science (BK21), KAIST, Daejeon (301-750), Republic of Korea
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47
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Nakamura S, Nakashima H, Sugimoto H, Sano H, Hattori M, Shibata N, Toru T. Enantioselective CC Bond Formation to Sulfonylimines through Use of the 2-Pyridinesulfonyl Group as a Novel Stereocontroller. Chemistry 2008; 14:2145-52. [DOI: 10.1002/chem.200701425] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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48
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Nakamura S, Sano H, Nakashima H, Kubo K, Shibata N, Toru T. Enantioselective Mannich-type reaction of sulfonylimines having 2-pyridylsulfonyl group as a novel stereocontroller. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.05.127] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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