1
|
Dong Y, Li R, Zhou J, Sun Z. Synthesis of Unsymmetrical 1,4-Dicarbonyl Compounds by Photocatalytic Oxidative Radical Additions. Org Lett 2021; 23:6387-6390. [PMID: 34339208 DOI: 10.1021/acs.orglett.1c02208] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein we report a photocatalytic oxidative radical addition reaction for the synthesis of unsymmetrical 1,4-dicarbonyl compounds. This reaction utilizes a desulfurization process to generate electrophilic radicals, which add to α-halogenated alkenes and undergo further oxidation to deliver 1,4-dicarbonyl compounds. This mild and highly efficient method provides a valuable alternative to known strategies.
Collapse
Affiliation(s)
- Ya Dong
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Pharm-X Center, School of Pharmacy, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
| | - Ruining Li
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Pharm-X Center, School of Pharmacy, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
| | - Junliang Zhou
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Pharm-X Center, School of Pharmacy, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
| | - Zhankui Sun
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Pharm-X Center, School of Pharmacy, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
| |
Collapse
|
2
|
Xia Q, Li X, Fu X, Zhou Y, Peng Y, Wang J, Song G. Copper-Catalyzed Three-Component Reactions of α-Ketoaldehyde, 1,3-Dicarbonyl Compound, and Organic Boronic Acid in Water: A Route to 1,4-Diketones. J Org Chem 2021; 86:9914-9923. [PMID: 34181415 DOI: 10.1021/acs.joc.1c01100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel three-component reaction of α-ketoaldehydes, 1,3-dicarbonyl compounds, and organic boronic acids catalyzed by CuO in water has been developed to give a wide range of products containing 1,3/1,4-diketones. The method has some advantages such as the use of readily available starting materials, wide substrate scopes, excellent yields, gram-scale synthesis, and mild reaction conditions.
Collapse
Affiliation(s)
- Qi Xia
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| | - Xiang Li
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| | - Xi Fu
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| | - Yaxuan Zhou
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| | - Yanqing Peng
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| | - Jiayi Wang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| | - Gonghua Song
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| |
Collapse
|
3
|
Medcalf Z, Moeller KD. Anodic Olefin Coupling Reactions: Elucidating Radical Cation Mechanisms and the Interplay between Cyclization and Second Oxidation Steps. CHEM REC 2021; 21:2442-2452. [PMID: 34117713 DOI: 10.1002/tcr.202100118] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/18/2021] [Indexed: 12/13/2022]
Abstract
Anodic olefin coupling reactions generate new bonds and ring skeletons through a net two electron process that reverses the polarity of a known, electron-rich functional group. While much of the early work on the mechanism of these reactions focused on the initial oxidation and cyclization steps of the process, the second oxidation step also plays a central role in determining the success of the reaction. Evidence supporting this observation is presented, along with evidence that optimization of this second oxidation step is not enough to pull a poor cyclization to the desired product. Successful cyclization reactions require optimization of both processes.
Collapse
Affiliation(s)
- Zach Medcalf
- Department of Chemistry, Washington University in Saint Louis, One Brookings Drive, 63130-4899, St Louis, MO, USA
| | - Kevin D Moeller
- Department of Chemistry, Washington University in Saint Louis, One Brookings Drive, 63130-4899, St Louis, MO, USA
| |
Collapse
|
4
|
Benson N, Davis A, Woydziak ZR. Synthesis of pH Dependent Pyrazole, Imidazole, and Isoindolone Dipyrrinone Fluorophores using a Claisen-Schmidt Condensation Approach. J Vis Exp 2021:10.3791/61944. [PMID: 34180889 PMCID: PMC8498924 DOI: 10.3791/61944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Methine-bridged conjugated bicyclic aromatic compounds are common constituents of a range of biologically relevant molecules such as porphyrins, dipyrrinones, and pharmaceuticals. Additionally, restricted rotation of these systems often results in highly to moderately fluorescent systems as observed in 3H,5H-dipyrrolo[1,2-c:2',1'-f]pyrimidin-3-ones, xanthoglows, pyrroloindolizinedione analogs, BODIPY analogs, and the phenolic and imidazolinone ring systems of Green Fluorescent Protein (GFP). This manuscript describes an inexpensive and operationally simple method of performing a Claisen-Schmidt condensation to generate a series of fluorescent pH dependent pyrazole/imidazole/isoindolone dipyrrinone analogs. While the methodology illustrates the synthesis of dipyrrinone analogs, it can be translated to produce a wide range of conjugated bicyclic aromatic compounds. The Claisen-Schmidt condensation reaction utilized in this method is limited in scope to nucleophiles and electrophiles that are enolizable under basic conditions (nucleophile component) and non-enolizable aldehydes (electrophile component). Additionally, both the nucleophilic and electrophilic reactants must contain functional groups that will not inadvertently react with hydroxide. Despite these limitations, this methodology offers access to completely novel systems that can be employed as biological or molecular probes.
Collapse
Affiliation(s)
- Nicole Benson
- Department of Physical and Life Sciences, Nevada State College
| | - Adam Davis
- Department of Humanities, Nevada State College
| | | |
Collapse
|
5
|
Caravana AC, Nagasing B, Dhanju S, Reynolds RG, Weiss EA, Thomson RJ. Electrochemical and Photocatalytic Oxidative Coupling of Ketones via Silyl Bis-enol Ethers. J Org Chem 2021; 86:6600-6611. [PMID: 33881862 PMCID: PMC11034822 DOI: 10.1021/acs.joc.1c00384] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Diastereoselective oxidative coupling of ketones through a silyl bis-enol ether intermediate by anodic and photocatalytic oxidation is reported. These methods provide several 1,4-diketones in good yields without the need for stoichiometric metal oxidants. The strategic use of a silicon tether enables the coupling of both aromatic and aliphatic ketones as well as the synthesis of quaternary centers. Cyclic voltammetry is used to gain insight into the oxidation events of the reaction.
Collapse
Affiliation(s)
- Aidan C Caravana
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Benjamin Nagasing
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Sandeep Dhanju
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Rebekah G Reynolds
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Emily A Weiss
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Regan J Thomson
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| |
Collapse
|
6
|
Bao‐Le L, Zhang H, Di J, Zhang Z. Polyoxometalate immobilized on MOF‐5 as an environment‐friendly catalyst for the synthesis of poly‐functionalized 3‐pyrrolin‐2‐ones. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Li Bao‐Le
- Department of Radiochemistry China Institute of Atomic Energy Beijing China
| | - Hong‐Yan Zhang
- Hebei Key Laboratory of Organic Functional Molecules, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Material Science Hebei Normal University Shijiazhuang China
| | - Jia‐Qi Di
- Hebei Key Laboratory of Organic Functional Molecules, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Material Science Hebei Normal University Shijiazhuang China
| | - Zhan‐Hui Zhang
- Hebei Key Laboratory of Organic Functional Molecules, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Material Science Hebei Normal University Shijiazhuang China
| |
Collapse
|
7
|
Chen W, Liu Q. Recent Advances in the Oxidative Coupling Reaction of Enol Derivatives. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202104058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
8
|
Xia M, Lambu MR, Tatina MB, Judeh ZMA. A Practical Synthesis of Densely Functionalized Pyrroles via a Three-Component Cascade Reaction between Carbohydrates, Oxoacetonitriles, and Ammonium Acetate. J Org Chem 2020; 86:837-849. [PMID: 33326248 DOI: 10.1021/acs.joc.0c02381] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A practical three-component reaction between unactivated carbohydrates, oxoacetonitriles, and ammonium acetate gave densely functionalized pyrroles in 75-96% yields. Disaccharides afforded novel pyrrolo-glycosides. This metal-free, Et3N-catalyzed cascade reaction proceeded with exclusive chemo-, regio-, and stereoselectivities and showed a wide substrate scope with high atom economy. It also proceeded successfully at a 2 g scale, demonstrating potential for large-scale synthesis. The functional groups on the pyrroles permit easy transformation to other handles for the construction of more complex structures. The reaction proceeded through a cascade mechanism involving several intermediates identified by mass spectrometric analysis. This work has great potential for the sustainable production of densely functionalized pyrroles from cheap and widely available carbohydrates and represents a key advancement in the sustainable synthesis of these ubiquitous heterocycles.
Collapse
Affiliation(s)
- Mengxin Xia
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, N1.2-B1-14, Singapore 637459
| | - Mallikharjuna Rao Lambu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, N1.2-B1-14, Singapore 637459
| | - Madhu Babu Tatina
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, N1.2-B1-14, Singapore 637459
| | - Zaher M A Judeh
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, N1.2-B1-14, Singapore 637459
| |
Collapse
|
9
|
Roy Chowdhury S, Singh D, Hoque IU, Maity S. Organic Dye-Catalyzed Intermolecular Radical Coupling of α-Bromocarbonyls with Olefins: Photocatalytic Synthesis of 1,4-Ketocarbonyls Using Air as an Oxidant. J Org Chem 2020; 85:13939-13950. [DOI: 10.1021/acs.joc.0c01985] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | - Deepak Singh
- Department of Chemistry, Indian Institute of Technology (ISM) Dhanbad, JH 826004, India
| | - Injamam Ul Hoque
- Department of Chemistry, Indian Institute of Technology (ISM) Dhanbad, JH 826004, India
| | - Soumitra Maity
- Department of Chemistry, Indian Institute of Technology (ISM) Dhanbad, JH 826004, India
| |
Collapse
|
10
|
Dhanju S, Caravana AC, Thomson RJ. Access to α-Pyrazole and α-Triazole Derivatives of Ketones from Oxidative Heteroarylation of Silyl Enolethers. Org Lett 2020; 22:8055-8058. [PMID: 33000948 DOI: 10.1021/acs.orglett.0c03005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The synthesis of α-pyrazole and α-triazole derivatives of ketones by the ceric ammonium nitrate-mediated oxidative coupling of enolsilanes with heteroarenes is reported. The reaction proceeds under mild reaction conditions to provide a diversity of products, including sterically hindered fully substituted derivatives.
Collapse
Affiliation(s)
- Sandeep Dhanju
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Aidan C Caravana
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Regan J Thomson
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| |
Collapse
|
11
|
Liu Q, Wang R, Song H, Liu Y, Wang Q. Synthesis of 1,4‐Dicarbonyl Compounds by Visible‐Light‐Mediated Cross‐Coupling Reactions of α‐Chlorocarbonyls and Enol Acetates. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000791] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qiang Liu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Rui‐Guo Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Hong‐Jian Song
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Yu‐Xiu Liu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Qing‐Min Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry Nankai University Tianjin 300071 People's Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin Tianjin 300071 People's Republic of China
| |
Collapse
|
12
|
Marshall AP, Johnson AR, Vega MM, Thomson RJ, Carlson EE. Ion Mobility Mass Spectrometry as an Efficient Tool for Identification of Streptorubin B in Streptomyces coelicolor M145. JOURNAL OF NATURAL PRODUCTS 2020; 83:159-163. [PMID: 31904955 PMCID: PMC7045693 DOI: 10.1021/acs.jnatprod.9b00828] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Ion mobility spectrometry was utilized to corroborate the identity of streptorubin B (2) as the natural product produced by Streptomyces coelicolor. Natural product 2 was initially assigned as butylcycloheptylprodigiosin (3), and only relatively recently was this assignment clarified. We present additional evidence of this assignment by comparing collisional cross sections (Ω) of synthetic standards of 2, 3, and metacycloprodigiosin (4) to the cyclic prodiginine produced by S. coelicolor. Calculated theoretical Ω values demonstrate that cyclic prodiginines could be identified without standards. This work highlights ion mobility as an efficient tool for the dereplication of natural products.
Collapse
Affiliation(s)
- Andrew P. Marshall
- Department of Chemistry, Molecular Biology and Biophysics, University of Minnesota-Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Andrew R. Johnson
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Marvin M. Vega
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Regan J. Thomson
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Erin E. Carlson
- Department of Chemistry, Molecular Biology and Biophysics, University of Minnesota-Twin Cities, Minneapolis, Minnesota 55455, United States
- Department of Medicinal Chemistry, Molecular Biology and Biophysics, University of Minnesota-Twin Cities, Minneapolis, Minnesota 55455, United States
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota-Twin Cities, Minneapolis, Minnesota 55455, United States
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
- Corresponding Author:
| |
Collapse
|
13
|
Liu Z. Lithium Aggregates in the Mechanism of an I 2-mediated Selective Intramolecular Dearomative Oxidative Coupling (IDOC) Reaction — A DFT Study. CHEM LETT 2019. [DOI: 10.1246/cl.190171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Zheng Liu
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, 26 Qiuyue Rd, Shanghai 200032, P. R. China
| |
Collapse
|
14
|
Vargová D, Némethová I, Plevová K, Šebesta R. Asymmetric Transition-Metal Catalysis in the Formation and Functionalization of Metal Enolates. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04357] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Denisa Vargová
- Comenius University in Bratislava, Faculty of Natural Sciences, Department of Organic Chemistry, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovak Republic
| | - Ivana Némethová
- Comenius University in Bratislava, Faculty of Natural Sciences, Department of Organic Chemistry, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovak Republic
| | - Kristína Plevová
- Comenius University in Bratislava, Faculty of Natural Sciences, Department of Organic Chemistry, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovak Republic
| | - Radovan Šebesta
- Comenius University in Bratislava, Faculty of Natural Sciences, Department of Organic Chemistry, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovak Republic
| |
Collapse
|
15
|
Ji M, Wu Z, Zhu C. Visible-light-induced consecutive C-C bond fragmentation and formation for the synthesis of elusive unsymmetric 1,8-dicarbonyl compounds. Chem Commun (Camb) 2019; 55:2368-2371. [PMID: 30724971 DOI: 10.1039/c9cc00378a] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Synthesis of the valuable unsymmetric 1,8-dicarbonyl compounds remains underexplored currently. Herein, we disclose a new strategy for the synthesis of 1,8-diketones through the coupling of cyclopropanols and cyanohydrins under visible-light irradiation. The protocol features a cascade of intriguing ring opening of cyclopropanols and remote cyano migration. The unfavorable addition of an alkyl radical to an electron-rich alkene is facilitated by the intramolecular cyanohydrin interception. A variety of multiply functionalized 1,8-diketones are furnished in useful yields. The products could be further transformed into other valuable compounds, manifesting the utility of this method.
Collapse
Affiliation(s)
- Meishan Ji
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, China.
| | | | | |
Collapse
|
16
|
Tanaka T, Tanaka T, Tsuji T, Yazaki R, Ohshima T. Strategy for Catalytic Chemoselective Cross-Enolate Coupling Reaction via a Transient Homocoupling Dimer. Org Lett 2018; 20:3541-3544. [DOI: 10.1021/acs.orglett.8b01313] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Takafumi Tanaka
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
| | - Tsukushi Tanaka
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
| | - Taro Tsuji
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
| | - Ryo Yazaki
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
| | - Takashi Ohshima
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
| |
Collapse
|
17
|
Peixoto D, Ferreira EP, Lourenço AM, Johnson JL, Lobo AM, Polavarapu PL. (R)-Metacycloprodigiosin-HCl: Chiroptical properties and structure. Chirality 2018; 30:932-942. [PMID: 29746716 DOI: 10.1002/chir.22867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 03/29/2018] [Accepted: 04/04/2018] [Indexed: 01/15/2023]
Abstract
(R)-Metacycloprodigiosin can exist in three different tautomeric forms, each with hydrogens at C9' and C12 in syn or anti orientation. With the addition of HCl, this structural diversity reduces to syn-(R)-metacycloprodigiosin-HCl (1a) and anti-(R)-metacycloprodigiosin-HCl (1b), each with multiple conformers. Energetics and chiroptical properties, namely, electronic circular dichroism (ECD) and specific optical rotation (SOR), of (R)-metacycloprodigiosin-HCl have been investigated at B3LYP/6-311++G(2d,2p) level. The experimental ECD spectra of (R)-metacycloprodigiosin-HCl have also been measured. Calculations indicated that the lowest energy conformer of 1b is approximately 2.7 kcal/mol lower in energy than that of 1a, and the energy barrier for anti to syn conversion is approximately 13 kcal/mol. The population weighted calculated SORs of 1a and 1b are, respectively, positive and negative. The respective calculated ECD spectra of these pseudoenantiomers show an almost mirror image relationship between them. The experimental SOR and ECD compare well with those predicted for 1b. Thus, 1b is expected to be predominant, a situation confirmed also by nuclear Overhauser effect (NOE) data, with a similar conclusion reached for prodigiosin R1.
Collapse
Affiliation(s)
- Daniela Peixoto
- Department of Chemistry, REQUIMTE/LAQV & UCIBIO, NOVA University of Lisbon, Caparica, Portugal
| | - Elisabete P Ferreira
- Department of Chemistry, REQUIMTE/LAQV & UCIBIO, NOVA University of Lisbon, Caparica, Portugal
| | - Ana M Lourenço
- Department of Chemistry, REQUIMTE/LAQV & UCIBIO, NOVA University of Lisbon, Caparica, Portugal
| | - Jordan L Johnson
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee
| | - Ana M Lobo
- Department of Chemistry, REQUIMTE/LAQV & UCIBIO, NOVA University of Lisbon, Caparica, Portugal
| | | |
Collapse
|
18
|
Stereoselective synthesis of 3,4-di-substituted mercaptolactones via photoredox-catalyzed radical addition of thiophenols. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.04.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
19
|
Che C, Qian Z, Wu M, Zhao Y, Zhu G. Intermolecular Oxidative Radical Addition to Aromatic Aldehydes: Direct Access to 1,4- and 1,5-Diketones via Silver-Catalyzed Ring-Opening Acylation of Cyclopropanols and Cyclobutanols. J Org Chem 2018; 83:5665-5673. [DOI: 10.1021/acs.joc.8b00666] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Chao Che
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Zhaosheng Qian
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Mingchang Wu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Ying Zhao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| |
Collapse
|
20
|
Bai XT, Zhang QQ, Zhang S, Chen DY, Fu JY, Zhu JY, Wang YB, Tang YT. Carbonyl-Oxygen-Assisted KOMe-Mediated Formal Hydration of 4-Alkynones: Complete Regioselectivity in the One-Pot Synthesis of 1,4-Diketones under Mild Conditions. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Xue-Ting Bai
- Institute of Functional Organic Molecular Engineering; Henan Engineering Laboratory of Flame-Retardant and Functional Materials; College of Chemistry and Chemical Engineering; Henan University; 475004 Kaifeng China
| | - Qian-Qian Zhang
- Institute of Functional Organic Molecular Engineering; Henan Engineering Laboratory of Flame-Retardant and Functional Materials; College of Chemistry and Chemical Engineering; Henan University; 475004 Kaifeng China
| | - Shuai Zhang
- Institute of Functional Organic Molecular Engineering; Henan Engineering Laboratory of Flame-Retardant and Functional Materials; College of Chemistry and Chemical Engineering; Henan University; 475004 Kaifeng China
| | - Dan-Yun Chen
- Institute of Functional Organic Molecular Engineering; Henan Engineering Laboratory of Flame-Retardant and Functional Materials; College of Chemistry and Chemical Engineering; Henan University; 475004 Kaifeng China
| | - Ji-Ya Fu
- Institute of Functional Organic Molecular Engineering; Henan Engineering Laboratory of Flame-Retardant and Functional Materials; College of Chemistry and Chemical Engineering; Henan University; 475004 Kaifeng China
| | - Jun-Yan Zhu
- Institute of Functional Organic Molecular Engineering; Henan Engineering Laboratory of Flame-Retardant and Functional Materials; College of Chemistry and Chemical Engineering; Henan University; 475004 Kaifeng China
| | - Yan-Bo Wang
- Institute of Functional Organic Molecular Engineering; Henan Engineering Laboratory of Flame-Retardant and Functional Materials; College of Chemistry and Chemical Engineering; Henan University; 475004 Kaifeng China
| | - Yan-Ting Tang
- Institute of Functional Organic Molecular Engineering; Henan Engineering Laboratory of Flame-Retardant and Functional Materials; College of Chemistry and Chemical Engineering; Henan University; 475004 Kaifeng China
| |
Collapse
|
21
|
Robinson EE, Thomson RJ. A Strategy for the Convergent and Stereoselective Assembly of Polycyclic Molecules. J Am Chem Soc 2018; 140:1956-1965. [PMID: 29309727 DOI: 10.1021/jacs.7b13234] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The stereoselective oxidative coupling of cyclic ketones via silyl bis-enol ethers followed by ring-closing metathesis is shown to be a general and powerful reaction sequence for the preparation of diverse polycyclic scaffolds from simple precursors. The modular strategy successfully constructs substructures prevalent in numerous bioactive natural product families, varying in substitution and carbocyclic composition. Several of the prepared compounds were shown to possess potent cytotoxic activity against a panel of tumor cell lines. The utility of this strategy was further demonstrated by a concise and highly convergent 17-step formal synthesis of the complex antimalarial marine diterpene, (+)-7,20-diisocyanoadociane.
Collapse
Affiliation(s)
- Emily E Robinson
- Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Regan J Thomson
- Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States
| |
Collapse
|
22
|
Wang AF, Zhou P, Zhu YL, Hao WJ, Li G, Tu SJ, Jiang B. Metal-free benzannulation of 1,7-diynes towards unexpected 1-aroyl-2-naphthaldehydes and their application in fused aza-heterocyclic synthesis. Chem Commun (Camb) 2017; 53:3369-3372. [DOI: 10.1039/c7cc00323d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A novel I2-mediated benzannulation of 1,7-diyne-involved 1,4-oxo-migration was established, providing unexpected 1-aroyl-2-naphthaldehydes. The resulting 1-aroyl-2-naphthaldehydes were successfully applied in the synthesis of polycyclic isoindoles.
Collapse
Affiliation(s)
- Ai-Fang Wang
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Peng Zhou
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Yi-Long Zhu
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Wen-Juan Hao
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Guigen Li
- Department of Chemistry and Biochemistry
- Texas Tech University
- Lubbock
- USA
| | - Shu-Jiang Tu
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Bo Jiang
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| |
Collapse
|
23
|
Heravi M, Zadsirjan V, Hamidi H, Tabar Amiri PH. Total synthesis of natural products containing benzofuran rings. RSC Adv 2017. [DOI: 10.1039/c7ra03551a] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
In this review, various approaches for the construction of benzofurans as an important moiety in different natural products during the total synthesis of the natural of products are underscored.
Collapse
Affiliation(s)
- Majid M. Heravi
- Department of Chemistry
- School of Sciences
- Alzahra University
- Tehran
- Iran
| | - Vahideh Zadsirjan
- Department of Chemistry
- School of Sciences
- Alzahra University
- Tehran
- Iran
| | - Hoda Hamidi
- Department of Chemistry
- School of Sciences
- Alzahra University
- Tehran
- Iran
| | | |
Collapse
|
24
|
Lund KLAR, Figliola C, Kajetanowicz AK, Thompson A. Synthesis and anticancer activity of prodigiosenes bearing C-ring esters and amides. RSC Adv 2017. [DOI: 10.1039/c7ra01628j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Ten novel prodigiosenes with anticancer activity.
Collapse
|
25
|
Li J, Zhang Q, Yin J, Yu C, Cheng K, Wei Y, Hao E, Jiao L. Metal-Free and Versatile Synthetic Routes to Natural and Synthetic Prodiginines from Boron Dipyrrin. Org Lett 2016; 18:5696-5699. [DOI: 10.1021/acs.orglett.6b02924] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jin Li
- Laboratory
of Functional
Molecular Solids, Ministry of Education; School of Chemistry and Materials
Science, Anhui Normal University, Wuhu 241000, China
| | - Qian Zhang
- Laboratory
of Functional
Molecular Solids, Ministry of Education; School of Chemistry and Materials
Science, Anhui Normal University, Wuhu 241000, China
| | - Jian Yin
- Laboratory
of Functional
Molecular Solids, Ministry of Education; School of Chemistry and Materials
Science, Anhui Normal University, Wuhu 241000, China
| | - Changjiang Yu
- Laboratory
of Functional
Molecular Solids, Ministry of Education; School of Chemistry and Materials
Science, Anhui Normal University, Wuhu 241000, China
| | - Kai Cheng
- Laboratory
of Functional
Molecular Solids, Ministry of Education; School of Chemistry and Materials
Science, Anhui Normal University, Wuhu 241000, China
| | - Yun Wei
- Laboratory
of Functional
Molecular Solids, Ministry of Education; School of Chemistry and Materials
Science, Anhui Normal University, Wuhu 241000, China
| | - Erhong Hao
- Laboratory
of Functional
Molecular Solids, Ministry of Education; School of Chemistry and Materials
Science, Anhui Normal University, Wuhu 241000, China
| | - Lijuan Jiao
- Laboratory
of Functional
Molecular Solids, Ministry of Education; School of Chemistry and Materials
Science, Anhui Normal University, Wuhu 241000, China
| |
Collapse
|
26
|
Yan M, Lo JC, Edwards JT, Baran PS. Radicals: Reactive Intermediates with Translational Potential. J Am Chem Soc 2016; 138:12692-12714. [PMID: 27631602 PMCID: PMC5054485 DOI: 10.1021/jacs.6b08856] [Citation(s) in RCA: 667] [Impact Index Per Article: 83.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Indexed: 02/08/2023]
Abstract
This Perspective illustrates the defining characteristics of free radical chemistry, beginning with its rich and storied history. Studies from our laboratory are discussed along with recent developments emanating from others in this burgeoning area. The practicality and chemoselectivity of radical reactions enable rapid access to molecules of relevance to drug discovery, agrochemistry, material science, and other disciplines. Thus, these reactive intermediates possess inherent translational potential, as they can be widely used to expedite scientific endeavors for the betterment of humankind.
Collapse
Affiliation(s)
- Ming Yan
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Julian C. Lo
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Jacob T. Edwards
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Phil S. Baran
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| |
Collapse
|
27
|
Urbanaitė A, Čikotienė I. Synthesis of Polysubstituted Pyrroles through the Tandem 1,3-Addition/5-endo-digCyclization of 1-(1-Alkynyl)cyclopropyl Imines. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600985] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Aurelija Urbanaitė
- Department of Organic Chemistry; Faculty of Chemistry; Vilnius University; Naugarduko 24 03225 Vilnius Lithuania
| | - Inga Čikotienė
- Department of Organic Chemistry; Faculty of Chemistry; Vilnius University; Naugarduko 24 03225 Vilnius Lithuania
| |
Collapse
|
28
|
|
29
|
Chan CK, Chan YL, Tsai YL, Chang MY. One-Pot Synthesis of 2-Cyano-1,4-diketones: Applications to Synthesis of Cyanosubstituted Furans, Pyrroles, and Dihydropyridazines. J Org Chem 2016; 81:8112-20. [DOI: 10.1021/acs.joc.6b01672] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chieh-Kai Chan
- Department of Medicinal and Applied Chemistry, and General Research Centers of R&D office, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Yi-Ling Chan
- Department of Medicinal and Applied Chemistry, and General Research Centers of R&D office, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Yu-Lin Tsai
- Department of Medicinal and Applied Chemistry, and General Research Centers of R&D office, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Meng-Yang Chang
- Department of Medicinal and Applied Chemistry, and General Research Centers of R&D office, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| |
Collapse
|
30
|
Hu DX, Withall DM, Challis GL, Thomson RJ. Structure, Chemical Synthesis, and Biosynthesis of Prodiginine Natural Products. Chem Rev 2016; 116:7818-53. [PMID: 27314508 PMCID: PMC5555159 DOI: 10.1021/acs.chemrev.6b00024] [Citation(s) in RCA: 108] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The prodiginine family of bacterial alkaloids is a diverse set of heterocyclic natural products that have likely been known to man since antiquity. In more recent times, these alkaloids have been discovered to span a wide range of chemical structures that possess a number of interesting biological activities. This review provides a comprehensive overview of research undertaken toward the isolation and structural elucidation of the prodiginine family of natural products. Additionally, research toward chemical synthesis of the prodiginine alkaloids over the last several decades is extensively reviewed. Finally, the current, evidence-based understanding of the various biosynthetic pathways employed by bacteria to produce prodiginine alkaloids is summarized.
Collapse
Affiliation(s)
- Dennis X. Hu
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - David M. Withall
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Gregory L. Challis
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Regan J. Thomson
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| |
Collapse
|
31
|
Identification of a prodigiosin cyclization gene in the roseophilin producer and production of a new cyclized prodigiosin in a heterologous host. J Antibiot (Tokyo) 2016; 70:196-199. [DOI: 10.1038/ja.2016.94] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 06/13/2016] [Accepted: 06/24/2016] [Indexed: 11/08/2022]
|
32
|
Horn EJ, Silverston JS, Vanderwal CD. A Failed Late-Stage Epimerization Thwarts an Approach to Ineleganolide. J Org Chem 2016; 81:1819-38. [PMID: 26863401 DOI: 10.1021/acs.joc.5b02550] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Significant efforts were made to complete a synthesis of the complex norcembranoid ineleganolide via a seemingly attractive strategy involving late-stage creation of the central seven-membered ring. While the two key enantioenriched building blocks were made via high-yielding sequences and their convergent union was efficient, the critical C4-C5 bond of this sterically congested natural product could never be forged. Several interesting examples of unexpected acid-base behavior and unanticipated proximity-induced reactivity accounted for most of the problems in the execution of the synthesis plan.
Collapse
Affiliation(s)
- Evan J Horn
- Department of Chemistry, University of California , 1102 Natural Sciences II, Irvine, California 92697-2025, United States
| | - Joel S Silverston
- Department of Chemistry, University of California , 1102 Natural Sciences II, Irvine, California 92697-2025, United States
| | - Christopher D Vanderwal
- Department of Chemistry, University of California , 1102 Natural Sciences II, Irvine, California 92697-2025, United States
| |
Collapse
|
33
|
Gholap SS. Pyrrole: An emerging scaffold for construction of valuable therapeutic agents. Eur J Med Chem 2015; 110:13-31. [PMID: 26807541 DOI: 10.1016/j.ejmech.2015.12.017] [Citation(s) in RCA: 228] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 12/05/2015] [Accepted: 12/10/2015] [Indexed: 12/20/2022]
Abstract
Pyrrole derivatives comprise a class of biologically active heterocyclic compounds which can serve as promising scaffolds for antimicrobial, antiviral, antimalarial, antitubercular, anti-inflammatory and enzyme inhibiting drugs. Due to their inimitable anticancer and anti-tubercular properties, researchers were inspired to develop novel pyrrole derivatives for the treatment of MDR pathogens. In the present review the main target is to focus on the development of pyrrole mimics, with emphasis based on their structure activity relationship (SAR). The present review is being obliging for the future development of pyrrole therapeutics.
Collapse
Affiliation(s)
- Somnath S Gholap
- Department of Chemistry, Padmashri Vikhe Patil College, Pravaranagar (Loni kd.), Rahata, Ahmednagar, 413713, Maharashtra, India.
| |
Collapse
|
34
|
Andrade MS, Silva VS, Lourenço AM, Lobo AM, Rzepa HS. Chiroptical properties of streptorubin B: the synergy between theory and experiment. Chirality 2015; 27:745-51. [PMID: 26316261 DOI: 10.1002/chir.22486] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Revised: 05/18/2015] [Accepted: 07/02/2015] [Indexed: 11/06/2022]
Abstract
Analysis of the calculated and measured optical rotation (OR) together with other calculated chiroptical properties such as electronic circular dichroism (ECD) and vibrational circular dichroism (VCD) of the prodigiosin alkaloid streptorubin B shows that these are dominated by the pseudoenantiomeric atropisomers anti-(S)-streptorubin B (1A) and syn-(S)-streptorubin (1B). Atropisomerism is a dynamic phenomenon with a potentially nonequilibrium population of isomers, and accordingly the measured chiroptical responses may vary with time, concentration, temperature, and the anion of the salts used. Streptorubin also has the potential to form stacked homodimers for which the optical rotations measured at 589 nm can vary greatly due to the presence of ECD-active electronic transitions in this region.
Collapse
Affiliation(s)
- Marta S Andrade
- Department of Chemistry, REQUIMTE/LAQV, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Caparica, Portugal
| | - Vanessa S Silva
- Department of Chemistry, REQUIMTE/LAQV, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Caparica, Portugal
| | - Ana M Lourenço
- Department of Chemistry, REQUIMTE/LAQV, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Caparica, Portugal
| | - Ana M Lobo
- Department of Chemistry, REQUIMTE/LAQV, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Caparica, Portugal
| | - Henry S Rzepa
- Department of Chemistry, Imperial College London, South Kensington Campus, Exhibition Road, London, UK
| |
Collapse
|
35
|
Lee SJ, Bae JY, Cho CW. Phase-Transfer-Catalyzed Asymmetric Synthesis of ChiralN-Substituted Pyrazoles by Aza-Michael Reaction. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500940] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
36
|
Vega MM, Crain DM, Konkol LC, Thomson RJ. Enantioselective synthesis of metacycloprodigiosin via the "Wasserman pyrrole". Tetrahedron Lett 2015; 56:3228-3230. [PMID: 26120213 DOI: 10.1016/j.tetlet.2014.12.075] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
A concise, nine-step enantioselective total synthesis of metacycloprodigiosin is reported. The synthesis provides increased step-efficiency over the previous racemic and enantioselective syntheses of this compound. Key features of the work include investigations into a convergent oxidative coupling reaction and subsequent ring-closing metathesis to deliver an advanced pyrrole intermediate we name the "Wasserman pyrrole" that can be converted to metacycloprodigiosin in one step.
Collapse
Affiliation(s)
- Marvin M Vega
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208
| | - Diana M Crain
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208
| | - Leah C Konkol
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208
| | - Regan J Thomson
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208
| |
Collapse
|
37
|
Zi W, Zuo Z, Ma D. Intramolecular dearomative oxidative coupling of indoles: a unified strategy for the total synthesis of indoline alkaloids. Acc Chem Res 2015; 48:702-11. [PMID: 25667972 DOI: 10.1021/ar5004303] [Citation(s) in RCA: 292] [Impact Index Per Article: 32.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Indole alkaloids, one of the largest classes of alkaloids, serve as an important and rich source of pharmaceuticals and have inspired synthetic chemists to develop novel chemical transformations and synthetic strategies. Many biologically active natural products contain challenging indoline scaffolds, which feature a C3 all-carbon quaternary stereocenter that is often surrounded by a complicated polycyclic ring system. The creation of this quaternary stereocenter creates an inherent synthetic challenge because the substituents on the carbon center cause high steric repulsion. In addition, the presence of nitrogen atoms within the surrounding polycyclic rings can lead to synthetic difficulties. Oxidative coupling between two sp(3)-hybridized carbon anions provides a unique and powerful method for building C-C single bonds, especially for generating a C-C bond that joins one or two vicinal quaternary stereocenters. Although chemists have known of this transformation for a long time, they have only applied this reaction in total synthesis of complex natural products during the past decade. The progress of this class of reaction depends on the use of indole moieties as coupling partners. In this Account, we summarize our recent efforts to develop iodine-mediated intramolecular dearomative oxidative coupling (IDOC) reactions of indoles as part of a unified strategy for the total synthesis of three classes of indoline alkaloids. We categorized these IDOC reactions into three types based on their mode of connection to the indole moiety. In type I, the carboanion nucleophile was tethered to the indole at the C3 position. This reaction enabled the assembly of skeleton A, which features a spiro ring at the C3 position of the indole. We demonstrated the efficiency of this method by quickly assembling two classes of tetracyclic compounds and completing the total synthesis of (-)-communesins F, A, and B. For the type II IDOC reactions, the carboanion nucleophile residing at the C2 position of the indole formed a quaternary center at the C3 position of indole to produce skeleton B. We applied this IDOC reaction to synthesize two akuammiline alkaloids, vincorine and aspidophylline A. Type III IDOC reactions employed substrates with a preinstalled ring at the C2 and C3 positions of the indole. These transformations proceeded smoothly to afford polycyclic ring system C, which we used in the first enantioselective total synthesis of Kopsia alkaloid methyl N-decarbomethoxychanofruticosinate. These results further demonstrate how new chemical strategies and reactions facilitate both the first total syntheses of natural products and the discovery of more efficient synthetic routes.
Collapse
Affiliation(s)
- Weiwei Zi
- State Key Laboratory of Bioorganic
and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Zhiwei Zuo
- State Key Laboratory of Bioorganic
and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Dawei Ma
- State Key Laboratory of Bioorganic
and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| |
Collapse
|
38
|
Huang S, Kötzner L, De CK, List B. Catalytic asymmetric dearomatizing redox cross coupling of ketones with aryl hydrazines giving 1,4-diketones. J Am Chem Soc 2015; 137:3446-9. [PMID: 25715060 DOI: 10.1021/ja511200j] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
An asymmetric Brønsted acid catalyzed dearomatizing redox cross coupling reaction has been realized, in which aryl hydrazines react with ketones to deliver 1,4-diketones, bearing an all-carbon quarternary stereocenter in high enantiopurity.
Collapse
Affiliation(s)
- Shenlin Huang
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Lisa Kötzner
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Chandra Kanta De
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| |
Collapse
|
39
|
Nisha N, Kumar K, Kumar V. Prodigiosin alkaloids: recent advancements in total synthesis and their biological potential. RSC Adv 2015. [DOI: 10.1039/c4ra10296g] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The present review article is focused on the medicinal potential and total synthesis of prodigiosins witnessed in the last decade. The aim will be to provide an inspiration to the marvels and pit falls of constructing the polypyrrole heterocycles with in the complex systems.
Collapse
Affiliation(s)
- Nisha Nisha
- Department of Chemistry
- Guru Nanak Dev University
- Amritsar-143005
- India
| | - Kewal Kumar
- Department of Chemistry
- Guru Nanak Dev University
- Amritsar-143005
- India
| | - Vipan Kumar
- Department of Chemistry
- Guru Nanak Dev University
- Amritsar-143005
- India
| |
Collapse
|
40
|
Pelkey ET, Pelkey SJ, Greger JG. De Novo Synthesis of 3-Pyrrolin-2-Ones. ADVANCES IN HETEROCYCLIC CHEMISTRY 2015. [DOI: 10.1016/bs.aihch.2015.04.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
41
|
Germain N, Schlaefli D, Chellat M, Rosset S, Alexakis A. Domino Asymmetric Conjugate Addition–Conjugate Addition. Org Lett 2014; 16:2006-9. [DOI: 10.1021/ol5005752] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nicolas Germain
- Department of Organic Chemistry, University of Geneva, Quai Ernest
Ansermet, 30, 1211 Geneva 4, Switzerland
| | - Doriane Schlaefli
- Department of Organic Chemistry, University of Geneva, Quai Ernest
Ansermet, 30, 1211 Geneva 4, Switzerland
| | - Mathieu Chellat
- Department of Organic Chemistry, University of Geneva, Quai Ernest
Ansermet, 30, 1211 Geneva 4, Switzerland
| | - Stéphane Rosset
- Department of Organic Chemistry, University of Geneva, Quai Ernest
Ansermet, 30, 1211 Geneva 4, Switzerland
| | - Alexandre Alexakis
- Department of Organic Chemistry, University of Geneva, Quai Ernest
Ansermet, 30, 1211 Geneva 4, Switzerland
| |
Collapse
|
42
|
Rastogi S, Marchal E, Uddin I, Groves B, Colpitts J, McFarland SA, Davis JT, Thompson A. Synthetic prodigiosenes and the influence of C-ring substitution on DNA cleavage, transmembrane chloride transport and basicity. Org Biomol Chem 2014; 11:3834-45. [PMID: 23640568 DOI: 10.1039/c3ob40477c] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Analogues of the tripyrrolic natural product prodigiosin bearing an additional methyl and a carbonyl group at the C-ring were synthesised and evaluated. In vitro anticancer activity screening (NCI) and the study of modes of action (copper-mediated cleavage of double-stranded DNA and transmembrane transport of chloride anions) showed that the presence of the methyl group is not detrimental to activity. Furthermore, although the presence of an ester conjugated to the prodigiosene C-ring seems to decrease both pK(a) and chloride transport efficiency compared to the natural product, these analogues still exhibit a high rate of chloride transport. All analogues exhibit good in vitro anticancer activity and reduced toxicity compared to the natural product: compare an acute systemic toxicity of 100 mg kg(-1) in mice vs. 4 mg kg(-1) for prodigiosin, pointing towards a larger therapeutic window than for the natural product.
Collapse
Affiliation(s)
- Soumya Rastogi
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Zhang F, Du P, Chen J, Wang H, Luo Q, Wan X. Co-Catalyzed Synthesis of 1,4-Dicarbonyl Compounds Using TBHP Oxidant. Org Lett 2014; 16:1932-5. [DOI: 10.1021/ol5004687] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Feng Zhang
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, China
| | - Peng Du
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, China
| | - Jijun Chen
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, China
| | - Hongxiang Wang
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, China
| | - Qiang Luo
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, China
| | - Xiaobing Wan
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, China
| |
Collapse
|
44
|
Amaya T, Masuda T, Maegawa Y, Hirao T. Oxovanadium(v)-induced diastereoselective oxidative homocoupling of boron enolates. Chem Commun (Camb) 2014; 50:2279-81. [DOI: 10.1039/c3cc49624d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
45
|
Abstract
The first total synthesis of propolisbenzofuran B, a bioactive natural product isolated from honeybee propolis resin, is reported. The convergent synthesis makes use of a silicon-tether controlled oxidative ketone-ketone cross-coupling and a novel benzofuran-generating cascade reaction to deliver the core structure of the natural product from readily prepared precursors.
Collapse
Affiliation(s)
- Brian T Jones
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208 USA
| | - Christopher T Avetta
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208 USA
| | - Regan J Thomson
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208 USA
| |
Collapse
|
46
|
Jones BT, Hu DX, Savoie BM, Thomson RJ. Elimination of butylcycloheptylprodigiosin as a known natural product inspired by an evolutionary hypothesis for cyclic prodigiosin biosynthesis. JOURNAL OF NATURAL PRODUCTS 2013; 76:1937-45. [PMID: 24053736 PMCID: PMC3828036 DOI: 10.1021/np400531b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The cyclic prodigiosins are an important family of bioactive natural products that continue to be the subject of numerous structural, synthetic, and biosynthetic studies. In particular, the structural assignments of the isomeric cyclic prodigiosins butylcycloheptylprodigiosin (BCHP) and streptorubin B have been the cause of significant confusion. Herein, we report detailed studies regarding the electron impact (EI) mass spectra of synthetic BCHP and streptorubin B that have allowed us to distinguish the two compounds in the absence of quality historical isolation NMR data. On the basis of these fragmentation differences, the status of BCHP as a natural product is challenged. The proposed mechanism of fragmentation is supported by the EI mass spectra of synthetic pentyl-chain analogues of BCHP and streptorubin B, X-ray crystallography, and DFT calculations. Elimination of BCHP from the prodigiosin family supports a proposed evolutionary hypothesis for the surprising biosynthesis of cyclic prodigiosins.
Collapse
|
47
|
Ye F, Zheng ZJ, Deng WH, Zheng LS, Deng Y, Xia CG, Xu LW. Modulation of Multifunctional N,O,P Ligands for Enantioselective Copper-Catalyzed Conjugate Addition of Diethylzinc and Trapping of the Zinc Enolate. Chem Asian J 2013; 8:2242-53. [DOI: 10.1002/asia.201300544] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Indexed: 11/08/2022]
|
48
|
Zhao W, Fink DM, Labutta CA, Radosevich AT. A Csp3–Csp3 Bond Forming Reductive Condensation of α-Keto Esters and Enolizable Carbon Pronucleophiles. Org Lett 2013; 15:3090-3. [DOI: 10.1021/ol401276b] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Wei Zhao
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Darla M. Fink
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Carolyn A. Labutta
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Alexander T. Radosevich
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| |
Collapse
|
49
|
Schultz EE, Sarpong R. Application of In Situ-Generated Rh-Bound Trimethylenemethane Variants to the Synthesis of 3,4-Fused Pyrroles. J Am Chem Soc 2013; 135:4696-9. [DOI: 10.1021/ja401380d] [Citation(s) in RCA: 182] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Erica E. Schultz
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Richmond Sarpong
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| |
Collapse
|
50
|
Guo F, Clift MD, Thomson RJ. Oxidative Coupling of Enolates, Enol Silanes and Enamines: Methods and Natural Product Synthesis. European J Org Chem 2012; 2012:4881-4896. [PMID: 23471479 DOI: 10.1002/ejoc.201200665] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The oxidative coupling of enolates, enol silanes, and enamines provides a direct method for the construction of useful 1,4-dicarbonyl synthons. Despite being first reported in 1935, with subsequent important advances beginning in the 1970's, the development of this powerful reaction into a reliable methodology was somewhat limited. In recent years, there have been a number of reports from several research groups demonstrating advances in several neglected areas of oxidative coupling. This microreview summarizes these new advances in methodology and provides an overview of recent natural product syntheses that showcase the power of these transformations.
Collapse
Affiliation(s)
- Fenghai Guo
- Department of Chemistry, Northwestern University, 2145 Sheridan Rd, Evanston, Illinois 60208, USA
| | | | | |
Collapse
|