1
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Hilmy KMH, Kishk FNM, Shahen EBA, Sobh EA, Hawata MA. New pyrrole derivatives as DNA gyrase and 14α-demethylase inhibitors: Design, synthesis, antimicrobial evaluation, and molecular docking. Drug Dev Res 2023; 84:1204-1230. [PMID: 37165799 DOI: 10.1002/ddr.22080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 03/01/2023] [Accepted: 03/12/2023] [Indexed: 05/12/2023]
Abstract
An efficient one-pot reaction utilizing readily available chemical reagents was used to prepare novel 2-amino-1,5-diaryl-1H-pyrrole-3-carbonitrile derivatives and the structures of these compounds were validated by spectroscopic data and elemental analyses. All the synthetic compounds were evaluated for their antimicrobial activities (MZI assay). The tested compounds proved high activities on Staphylococcus aureus (Gram-positive bacteria) and Candida albicans (Pathogenic fungi). However, they did not show any activity on Escherichia coli (Gram-negative bacteria). The most effective compounds in MZI assay 7c, 9a, 9b, 11a, and 11b were selected to determine their MIC on S. aureus and C. albicans. Furthermore, DNA gyrase and 14-α demethylase inhibitory assays were performed to study the inhibitory activities of 7c, 9a, 9b, 11a, and 11b. The results illustrated that compound 9b was the most DNA gyrase inhibitor (IC50 of 0.0236 ± 0.45 µM, which was 1.3- fold higher than gentamicin reference IC50 values of 0.0323 ± 0.81 µM). In addition, compound 9b demonstrated the highest 14-α demethylase inhibitory effect with IC50 of 0.0013 ± 0.02 µM, compared to ketoconazole (IC50 of 0.0008 ± 0.03 µM) and fluconazole (IC50 of 0.00073 ± 0.01 µM), as antifungal reference drugs. Lastly, docking studies were performed to rationalize the dual inhibitory activities of the highly active compounds on both DNA gyrase and 14-α demethylase enzymes.
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Affiliation(s)
- Khaled M H Hilmy
- Department of Chemistry, Faculty of Science, El-Menoufia University, Shebin El-Kom, Egypt
| | - Fawzya N M Kishk
- Department of Chemistry, Faculty of Science, El-Menoufia University, Shebin El-Kom, Egypt
| | - Esmat B A Shahen
- Depatment of Biochemistry, Faculty of Medicine, Al-Azhar University for Girls, Cairo, Egypt
| | - Eman A Sobh
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Menoufia University, Menoufia, Shebin El-Kom, Egypt
| | - Mohamed A Hawata
- Department of Chemistry, Faculty of Science, El-Menoufia University, Shebin El-Kom, Egypt
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2
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Yang Z, Cao TT, Sun YF, Wu DS, Xu Y, Yang SH, Wang SQ, Wang L. Expeditious assembly of biuret-guanidine derivatives via the catalyst-free transformation. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2022; 24:259-267. [PMID: 35068269 DOI: 10.1080/10286020.2022.2027372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 01/06/2022] [Indexed: 06/14/2023]
Abstract
We disclose a mild and practical catalyst-free transformation for the expeditious construction of biuret-guanidine derivatives using aromatic isocyanates. This synthetic transformation is featured with mild reaction conditions and high efficiency.
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Affiliation(s)
- Zhen Yang
- Department of Traditional Chinese Medicine, Jilin Agricultural University, Changchun 130118, China
- Jilin Academy of Traditional Chinese Medical Science, Changchun 130021, China
| | - Ting-Ting Cao
- Department of Traditional Chinese Medicine, Jilin Agricultural University, Changchun 130118, China
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100193, China
| | - Yun-Fang Sun
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100193, China
| | - Dao-Shun Wu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100193, China
| | - Yue Xu
- Department of Traditional Chinese Medicine, Jilin Agricultural University, Changchun 130118, China
| | - Shi-Hai Yang
- Department of Traditional Chinese Medicine, Jilin Agricultural University, Changchun 130118, China
| | - Shu-Qin Wang
- Jilin Academy of Traditional Chinese Medical Science, Changchun 130021, China
| | - Lei Wang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100193, China
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3
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Abstract
This review deals with the synthesis of naturally occurring alkaloids containing partially or completely saturated pyrimidine nuclei. The interest in these compounds is associated with their structural diversity, high biological activity and toxicity. The review is divided into four parts, each of which describes a number of synthetic methodologies toward structurally different naturally occurring alkaloids containing saturated cyclic six-membered amidine, guanidine, aminal and urea (thiourea) moieties, respectively. The development of various synthetic strategies for the preparation of these compounds has remarkably increased during the past few decades. This is primarily due to the fact that some of these compounds are isolated only in limited quantities, which makes it practically impossible to study their full structural characteristics and biological activity.
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4
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Saha S, Maji MS. Cp*Co(III)-catalyzed thiocarbamate directed C−H aminocarbonyl-ation, amination, and cascade annulation of pyrroles. Chem Commun (Camb) 2022; 58:10865-10868. [DOI: 10.1039/d2cc03992c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cobalt(III)-catalyzed thiocarbamate directed aminocarbonylation and amination of C−H bond are described to access diverse amides. Biologically relevant pyrrolo[1,2-c]imidazoles were readily accessed via one-pot intramolecular cyclization at thiocarbamoyl directing group. Notably,...
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5
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Disadee W, Trisupphakant K, Ruchirawat S. Synthesis of Novel Fluorescent Bicyclic Amidines and Evaluation of Their Photophysical Properties. HETEROCYCLES 2022. [DOI: 10.3987/com-22-s(r)13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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6
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Ohashi E, Karanjit S, Nakayama A, Takeuchi K, Emam SE, Ando H, Ishida T, Namba K. Efficient construction of the hexacyclic ring core of palau'amine: the p K a concept for proceeding with unfavorable equilibrium reactions. Chem Sci 2021; 12:12201-12210. [PMID: 34667586 PMCID: PMC8457368 DOI: 10.1039/d1sc03260g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 08/10/2021] [Indexed: 11/21/2022] Open
Abstract
Palau'amine has received a great deal of attention as an attractive synthetic target due to its intriguing molecular architecture and significant immunosuppressive activity, and we achieved its total synthesis in 2015. However, the synthesized palau'amine has not been readily applicable to the mechanistic study of immunosuppressive activity, because it requires 45 longest linear steps from a commercially available compound. Here, we report the short-step construction of the ABCDEF hexacyclic ring core of palau'amine. The construction of the CDE tricyclic ring core in a single step is achieved by our pKa concept for proceeding with unfavorable equilibrium reactions, and a palau'amine analog without the aminomethyl and chloride groups is synthesized in 20 longest linear steps from the same starting material. The palau'amine analog is confirmed to retain the immunosuppressive activity. The present synthetic approach for a palau'amine analog has the potential for use in the development of palau'amine probes for mechanistic elucidation. A palau'amine analog (2) was synthesized from 2-cyclopentenone in 20 steps. The construction of the CDE tricyclic ring core in a single step is achieved by our pKa concept for proceeding with the unfavorable equilibrium reactions.![]()
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Affiliation(s)
- Eisaku Ohashi
- Graduate School of Pharmaceutical Sciences, Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan
| | - Sangita Karanjit
- Graduate School of Pharmaceutical Sciences, Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan .,Research Cluster on "Innovative Chemical Sensing", Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan
| | - Atsushi Nakayama
- Graduate School of Pharmaceutical Sciences, Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan .,Research Cluster on "Innovative Chemical Sensing", Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan
| | - Kohei Takeuchi
- Graduate School of Pharmaceutical Sciences, Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan
| | - Sherif E Emam
- Graduate School of Pharmaceutical Sciences, Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan
| | - Hidenori Ando
- Graduate School of Pharmaceutical Sciences, Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan
| | - Tatsuhiro Ishida
- Graduate School of Pharmaceutical Sciences, Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan
| | - Kosuke Namba
- Graduate School of Pharmaceutical Sciences, Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan .,Research Cluster on "Innovative Chemical Sensing", Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan
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7
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Abstract
Dihydropyrrolo[1,2-a]pyrazinone rings are a class of heterocycles present in a wide range of bioactive natural products and analogues thereof. As a direct result of their bioactivity, the synthesis of this privileged class of compounds has been extensively studied. This review provides an overview of these synthetic pathways. The literature is covered up until 2020 and is organized according to the specific strategies used to construct the scaffold: fusing a pyrazinone to an existing pyrrole, employing a pyrazinone-first strategy, an array of multicomponent reactions and some miscellaneous reactions.
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8
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Aziz MN, Singh RP, Gout D, Lovely CJ. Dearomatizing spirocyclization of thioureas, ureas and guanidines. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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9
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Synthesis and crystal structures of arylamidine Ru(III) compounds containing a tetradentate Schiff base ligand from a amine-amine coupling reaction. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2020.108361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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He Y, Wang X. Synthesis of Cyclic Amidines by Iridium-Catalyzed Deoxygenative Reduction of Lactams and Tandem Reaction with Sulfonyl Azides. Org Lett 2020; 23:225-230. [DOI: 10.1021/acs.orglett.0c03953] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Youliang He
- State Key Laboratory of Oganometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences (CAS), 345 Lingling Road, Shanghai 200032, P. R. China
| | - Xiaoming Wang
- State Key Laboratory of Oganometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences (CAS), 345 Lingling Road, Shanghai 200032, P. R. China
- School of Chemistry and Material Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, P. R. China
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11
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Santana AG, González CC. Tandem Radical Fragmentation/Cyclization of Guanidinylated Monosaccharides Grants Access to Medium-Sized Polyhydroxylated Heterocycles. Org Lett 2020; 22:8492-8495. [PMID: 33074675 DOI: 10.1021/acs.orglett.0c03091] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The fragmentation of anomeric alkoxyl radicals (ARF) and the subsequent cyclization promoted by hypervalent iodine provide an excellent method for the synthesis of guanidino-sugars. The methodology described herein is one of the few existing general methodologies for the formation of medium-sized exo- and endoguanidine-containing heterocycles presenting a high degree of oxygenation in their structure.
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Affiliation(s)
- Andrés G Santana
- Instituto de Productos Naturales y Agrobiología del C.S.I.C., Avenida Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - Concepción C González
- Instituto de Productos Naturales y Agrobiología del C.S.I.C., Avenida Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
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12
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Singh RP, Bhandari MR, Torres FM, Doundoulakis T, Gout D, Lovely CJ. Total Synthesis of (±)-2-Debromohymenin via Gold-Catalyzed Intramolecular Alkyne Hydroarylation. Org Lett 2020; 22:3412-3417. [DOI: 10.1021/acs.orglett.0c00883] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Ravi P. Singh
- Department of Chemistry and Biochemistry, University of Texas—Arlington, Arlington, Texas 76019-0065, United States
| | - Manojkumar R. Bhandari
- Department of Chemistry and Biochemistry, University of Texas—Arlington, Arlington, Texas 76019-0065, United States
| | - Fatima M. Torres
- Department of Chemistry and Biochemistry, University of Texas—Arlington, Arlington, Texas 76019-0065, United States
| | - Thomas Doundoulakis
- Department of Chemistry and Biochemistry, University of Texas—Arlington, Arlington, Texas 76019-0065, United States
| | - Delphine Gout
- Department of Chemistry and Biochemistry, University of Texas—Arlington, Arlington, Texas 76019-0065, United States
| | - Carl J. Lovely
- Department of Chemistry and Biochemistry, University of Texas—Arlington, Arlington, Texas 76019-0065, United States
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13
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Rao Kovvuri VR, Xue H, Romo D. Generation and Reactivity of 2-Amido-1,3-diaminoallyl Cations: Cyclic Guanidine Annulations via Net (3 + 2) and (4 + 3) Cycloadditions. Org Lett 2020; 22:1407-1413. [PMID: 32009413 DOI: 10.1021/acs.orglett.0c00019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Toward a method for direct conversion of alkenes to cyclic guanidines, we report that 1,3-dipolar cycloadditions of 2-amido-1,3-diamino allylic cations with alkenes provide a new method for direct cyclic guanidine annulation. Generated under oxidative conditions, the 2-amido-1,3-diaminoallyl cations react as 1,3-dipoles providing rapid access to 2-amino imidazolines through net (3 + 2) cycloadditions. The utility is demonstrated through a concise synthesis of the oroidin alkaloid, phakellin. The described 1,3-dipole also participates in net (4 + 3) cycloadditions with dienes.
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Affiliation(s)
- V Raghavendra Rao Kovvuri
- Department of Chemistry and Biochemistry , Baylor University , One Bear Place #97348 , Waco , Texas 76798 , United States
| | - Haoran Xue
- Department of Chemistry and Biochemistry , Baylor University , One Bear Place #97348 , Waco , Texas 76798 , United States
| | - Daniel Romo
- Department of Chemistry and Biochemistry , Baylor University , One Bear Place #97348 , Waco , Texas 76798 , United States
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14
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Sun Y, Zhou Y, Shi Y, Del Pozo J, Torker S, Hoveyda AH. Copper-Hydride-Catalyzed Enantioselective Processes with Allenyl Boronates. Mechanistic Nuances, Scope, and Utility in Target-Oriented Synthesis. J Am Chem Soc 2019; 141:12087-12099. [PMID: 31314510 DOI: 10.1021/jacs.9b05465] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Synthesis of complex bioactive molecules is substantially facilitated by transformations that efficiently and stereoselectively generate polyfunctional compounds. Designing such processes is hardly straightforward, however, especially when the desired route runs counter to the inherently favored reactivity profiles. Furthermore, in addition to being efficient and stereoselective, it is crucial that the products generated can be easily and stereodivergently modified. Here, we introduce a catalytic process that delivers versatile and otherwise difficult-to-access organoboron entities by combining an allenylboronate, a hydride, and an allylic phosphate. Two unique selectivity problems had to be solved: avoiding rapid side reaction of a Cu-H complex with an allylic phosphate, while promoting its addition to an allenylboronate as opposed to the commonly utilized boron-copper exchange. The utility of the approach is demonstrated by applications to concise preparation of the linear fragment of pumiliotoxin B (myotonic, cardiotonic) and enantioselective synthesis and structure confirmation of netamine C, a member of a family of anti-tumor and anti-malarial natural products. Completion of the latter routes required the following noteworthy developments: (1) a two-step all-catalytic sequence for conversion of a terminal alkene to a monosubstituted alkyne; (2) a catalytic SN2'- and enantioselective allylic substitution method involving a mild alkylzinc halide reagent; and (3) a diastereoselective [3+2]-cycloaddition to assemble the polycyclic structure of a guanidyl polycyclic natural product.
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Affiliation(s)
- Yu Sun
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Yuebiao Zhou
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Ying Shi
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Juan Del Pozo
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Sebastian Torker
- Supramolecular Science and Engineering Institute , University of Strasbourg , CNRS, 67000 Strasbourg , France
| | - Amir H Hoveyda
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States.,Supramolecular Science and Engineering Institute , University of Strasbourg , CNRS, 67000 Strasbourg , France
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15
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Singh RP, Gout D, Lovely CJ. Tandem Thioacylation-Intramolecular Hydrosulfenylation of Propargyl Amines - Rapid Access to 2-Aminothiazolidines. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801505] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Ravi P. Singh
- Department of Chemistry and Biochemistry; University of Texas Arlington; 700 Planetarium Place Arlington TX 76019-0065 USA
| | - Delphine Gout
- Center for Nanostructured Materials; University of Texas Arlington; 700 Planetarium Place Arlington TX 76019-0065 USA
| | - Carl J. Lovely
- Department of Chemistry and Biochemistry; University of Texas Arlington; 700 Planetarium Place Arlington TX 76019-0065 USA
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16
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17
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Zhou M, Li J, Tian C, Sun X, Zhu X, Cheng Y, An G, Li G. A Metal-Free Three-Component Reaction of trans-β-Nitrostyrene Derivatives, Dibromo Amides, and Amines Leading to Functionalized Amidines. J Org Chem 2019; 84:1015-1024. [PMID: 30592406 DOI: 10.1021/acs.joc.8b02998] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A mild, metal-free, and multicomponent route for the preparation of N-acyl amidines from nitroalkene derivatives, dibromo amides, and amines has been developed that accesses an initial α,α-dibromonitroalkane intermediate that can undergo C-C bond cleavage. This protocol offers an alternative approach toward N-acyl amidines and features the rapid construction of amidine frameworks with high diversity and complexity. The procedure also accesses bisamidine and α,β-unsaturated amidines which are challenging targets by traditional methods.
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Affiliation(s)
- Meng Zhou
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science , Heilongjiang University , No. 74, Xuefu Road , Nangang District, Harbin 150080 , People's Republic of China
| | - Jinlei Li
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science , Heilongjiang University , No. 74, Xuefu Road , Nangang District, Harbin 150080 , People's Republic of China
| | - Chao Tian
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science , Heilongjiang University , No. 74, Xuefu Road , Nangang District, Harbin 150080 , People's Republic of China
| | - Xiao Sun
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science , Heilongjiang University , No. 74, Xuefu Road , Nangang District, Harbin 150080 , People's Republic of China
| | - Xiaoting Zhu
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science , Heilongjiang University , No. 74, Xuefu Road , Nangang District, Harbin 150080 , People's Republic of China
| | - Yaohang Cheng
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science , Heilongjiang University , No. 74, Xuefu Road , Nangang District, Harbin 150080 , People's Republic of China
| | - Guanghui An
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science , Heilongjiang University , No. 74, Xuefu Road , Nangang District, Harbin 150080 , People's Republic of China.,College of Materials Science and Chemical Engineering , Harbin Engineering University , Harbin , Heilongjiang 150001 , People's Republic of China
| | - Guangming Li
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science , Heilongjiang University , No. 74, Xuefu Road , Nangang District, Harbin 150080 , People's Republic of China
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18
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Ueda H. Polycyclic Guanidine Natural Products: Total Synthesis of Batzelladines. J SYN ORG CHEM JPN 2019. [DOI: 10.5059/yukigoseikyokaishi.77.71] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hirofumi Ueda
- Graduate School of Pharmaceutical Sciences, Tohoku University
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19
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J. Lovely C, Ray A, Mukherjee S, Das J, Bhandari M, Herath A, Yousufuddin M. Heterosubstituted 4-Vinylimidazoles – Preparation and Diels-Alder Reactions. HETEROCYCLES 2019. [DOI: 10.3987/com-18-s(f)27] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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20
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Ray A, Yousufuddin M, Gout D, Lovely CJ. Intramolecular Diels-Alder Reaction of a Silyl-Substituted Vinylimidazole en Route to the Fully Substituted Cyclopentane Core of Oroidin Dimers. Org Lett 2018; 20:5964-5968. [PMID: 30192150 DOI: 10.1021/acs.orglett.8b02675] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
An intramolecular Diels-Alder reaction of a silyl-substituted vinylimidazole delivers a diastereomeric mixture of C4-silyl functionalized dihydrobenzimidazoles. Subsequent diastereoselective reduction and elaboration of the lactone gives rise to a polysubstituted tetrahydrobenzimidazole, which, upon oxidative rearrangement, affords a single spirofused imidazolone containing all of the relevant functionality for an approach to the oroidin dimers axinellamine, massadine, and palau'amine.
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Affiliation(s)
- Abhisek Ray
- Department of Chemistry and Biochemistry , University of Texas-Arlington , Arlington , Texas 76019-0065 , United States
| | - Muhammed Yousufuddin
- Department of Chemistry and Biochemistry , University of Texas-Arlington , Arlington , Texas 76019-0065 , United States
| | - Delphine Gout
- Department of Chemistry and Biochemistry , University of Texas-Arlington , Arlington , Texas 76019-0065 , United States
| | - Carl J Lovely
- Department of Chemistry and Biochemistry , University of Texas-Arlington , Arlington , Texas 76019-0065 , United States
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21
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Xu F, Shuler SA, Watson DA. Synthesis of N-H Bearing Imidazolidinones and Dihydroimidazolones Using Aza-Heck Cyclizations. Angew Chem Int Ed Engl 2018; 57:12081-12085. [PMID: 30125443 PMCID: PMC6141047 DOI: 10.1002/anie.201806295] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Indexed: 12/12/2022]
Abstract
The synthesis of unsaturated, unprotected imidazolidinones via an aza-Heck reaction is described. This palladium-catalyzed process allows for the cyclization of N-phenoxy ureas onto pendant alkenes. The reaction has broad functional group tolerance, can be applied to complex ring topologies, and can be used to directly prepare mono- and bis-unprotected imidazolidinones. By addition of Bu4 NI, dihydroimidazolones can be accessed from the same starting materials. Improved conditions for preparing unsaturated, unprotected lactams are also reported.
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Affiliation(s)
- Feiyang Xu
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (USA)
| | - Scott A. Shuler
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (USA)
| | - Donald A. Watson
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (USA)
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22
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Xu F, Shuler SA, Watson DA. Synthesis of N−H Bearing Imidazolidinones and Dihydroimidazolones Using Aza‐Heck Cyclizations. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806295] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Feiyang Xu
- Department of Chemistry and Biochemistry University of Delaware Newark DE 19716 USA
| | - Scott A. Shuler
- Department of Chemistry and Biochemistry University of Delaware Newark DE 19716 USA
| | - Donald A. Watson
- Department of Chemistry and Biochemistry University of Delaware Newark DE 19716 USA
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23
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Reid BT, Mailyan AK, Zakarian A. Total Synthesis of (+)-Guadinomic Acid via Hydroxyl-Directed Guanidylation. J Org Chem 2018; 83:9492-9496. [PMID: 29893133 DOI: 10.1021/acs.joc.8b01214] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Protecting-group-free total synthesis of (+)-guadinomic acid is reported using δ-valerolactone as a readily available starting material. The protocol utilizes the recent hydroxyl-directed guanidylation of unactivated alkenes as an approach for direct stereoselective incorporation of the guanidine unit furnishing the natural product in 7 steps.
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Affiliation(s)
- Bradley T Reid
- Department of Chemistry and Biochemistry , University of California , Santa Barbara , California 93110 , United States
| | - Artur K Mailyan
- Department of Chemistry and Biochemistry , University of California , Santa Barbara , California 93110 , United States
| | - Armen Zakarian
- Department of Chemistry and Biochemistry , University of California , Santa Barbara , California 93110 , United States
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24
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Cannon JS. A Nitrone Dipolar Cycloaddition Strategy toward an Enantioselective Synthesis of Massadine. Org Lett 2018; 20:3883-3887. [PMID: 29897770 DOI: 10.1021/acs.orglett.8b01464] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
An enantioselective route to the C,D-bicycle of massadine is reported. Enantiopure intermediates were generated by a single stereoselective reduction using the Corey-Bakshi-Shibata reagent. This initial stereoinduction was translated into the five contiguous stereocenters of the massadine D-ring by a synthetic route that features a diastereoselective and stereospecific Ireland-Claisen rearrangement of a trianionic enolate followed by a diastereoselective nitrone dipolar cycloaddition of a highly electron-poor oxime.
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Affiliation(s)
- Jeffrey S Cannon
- Department of Chemistry , University of California , 1102 Natural Sciences II, Irvine , California 92697-2025 , United States
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25
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Toward the Synthesis of Sceptrin and Benzosceptrin: Solvent Effect in Stereo- and Regioselective [2+2] Photodimerization and Easy Access to the Fully Substituted Benzobutane. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800458] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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26
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Aubert-Nicol S, Lessard J, Spino C. A Photorearrangement To Construct the ABDE Tetracyclic Core of Palau'amine. Org Lett 2018; 20:2615-2619. [PMID: 29667828 DOI: 10.1021/acs.orglett.8b00819] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A synthesis of the ABDE tetracyclic carbon core of palau'amine was achieved in 9 steps from commercial materials. The core's most notable feature, a highly strained trans cyclopenta[ c]pyrrolidine, was obtained in high yield using a ring contraction strategy starting from a much less strained trans bicyclic lactam derivative that is accessible in only 7 steps.
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Affiliation(s)
- Samuel Aubert-Nicol
- Département de Chimie , Université de Sherbrooke , 2500 Boul. Université , Sherbrooke , Québec , Canada , J1K 2R1
| | - Jean Lessard
- Département de Chimie , Université de Sherbrooke , 2500 Boul. Université , Sherbrooke , Québec , Canada , J1K 2R1
| | - Claude Spino
- Département de Chimie , Université de Sherbrooke , 2500 Boul. Université , Sherbrooke , Québec , Canada , J1K 2R1
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27
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Rapid access to the core skeleton of the [3 + 2]-type dimeric pyrrole-imidazole alkaloids by triplet ketone-mediated C-H functionalization. Tetrahedron 2018; 74:769-772. [PMID: 29622843 DOI: 10.1016/j.tet.2017.12.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The ability of triplet ketones to abstract a hydrogen atom from hydrocarbons is reminiscent of that of the high-spin metal-oxo complexes in C-H oxidation enzymes. In practice, the reactivity of triplet ketones is easier to control and applicable to promoting a wider range of reactions. We demonstrate herein the synthetic utility of triplet ketone-mediated C-addition of methanol to cyclopentenone derivatives with an expedient synthesis of the core skeleton of the [3+2]-type dimeric pyrrole-imidazole alkaloids. Remarkably, this photochemical C-H functionalization reaction is highly regioselective and can tolerate a good range of functional groups.
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28
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El-Demerdash A, Atanasov AG, Bishayee A, Abdel-Mogib M, Hooper JNA, Al-Mourabit A. Batzella, Crambe and Monanchora: Highly Prolific Marine Sponge Genera Yielding Compounds with Potential Applications for Cancer and Other Therapeutic Areas. Nutrients 2018; 10:E33. [PMID: 29301302 PMCID: PMC5793261 DOI: 10.3390/nu10010033] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 12/15/2017] [Accepted: 12/22/2017] [Indexed: 12/29/2022] Open
Abstract
Pyrroloquinoline and guanidine-derived alkaloids present distinct groups of marine secondary metabolites with structural diversity that displayed potentialities in biological research. A considerable number of these molecular architectures had been recorded from marine sponges belonging to different marine genera, including Batzella, Crambe, Monanchora, Clathria, Ptilocaulis and New Caledonian starfishes Fromia monilis and Celerina heffernani. In this review, we aim to comprehensively cover the chemodiversity and the bioactivities landmarks centered around the chemical constituents exclusively isolated from these three marine genera including Batzella, Crambe and Monanchora over the period 1981-2017, paying a special attention to the polycyclic guanidinic compounds and their proposed biomimetic landmarks. It is concluded that these marine sponge genera represent a rich source of novel compounds with potential applications for cancer and other therapeutic areas.
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Affiliation(s)
- Amr El-Demerdash
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Univ. Paris-Sud, University of Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-Sur-Yvette, France.
- Organic Chemistry Division, Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt.
| | - Atanas G Atanasov
- Institute of Genetics and Animal Breeding of the Polish Academy of Sciences, 05-552 Jastrzebiec, Poland.
- Department of Pharmacognosy, University of Vienna, 1090 Vienna, Austria.
| | - Anupam Bishayee
- Department of Pharmaceutical Sciences, College of Pharmacy, Larkin University, 18301 N. Miami Avenue, Miami, FL 33169, USA.
| | - Mamdouh Abdel-Mogib
- Organic Chemistry Division, Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt.
| | - John N A Hooper
- Queensland Museum, P.O. Box 3300, South Brisbane, QLD BC 4101, Australia.
| | - Ali Al-Mourabit
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Univ. Paris-Sud, University of Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-Sur-Yvette, France.
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29
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Ma Z, Chen C. Natural products as inspiration for the development of new synthetic methods. J CHIN CHEM SOC-TAIP 2018; 65:43-59. [PMID: 29430058 PMCID: PMC5800783 DOI: 10.1002/jccs.201700134] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Natural products have played an important role in shaping modern synthetic organic chemistry. In particular, their complex molecular skeletons have stimulated the development of many new synthetic methods. We highlight in this article some recent examples of synthetic design inspired by the biosynthesis of natural products.
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Affiliation(s)
- Zhiqiang Ma
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, USA
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P. R. China
| | - Chuo Chen
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, USA
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30
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Barbero H, Díez-Poza C, Barbero A. The Oxepane Motif in Marine Drugs. Mar Drugs 2017; 15:E361. [PMID: 29140270 PMCID: PMC5706050 DOI: 10.3390/md15110361] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 11/03/2017] [Accepted: 11/08/2017] [Indexed: 12/12/2022] Open
Abstract
Oceans have shown to be a remarkable source of natural products. The biological properties of many of these compounds have helped to produce great advances in medicinal chemistry. Within them, marine natural products containing an oxepanyl ring are present in a great variety of algae, sponges, fungus and corals and show very important biological activities, many of them possessing remarkable cytotoxic properties against a wide range of cancer cell lines. Their rich chemical structures have attracted the attention of many researchers who have reported interesting synthetic approaches to these targets. This review covers the most prominent examples of these types of compounds, focusing the discussion on the isolation, structure determination, medicinal properties and total synthesis of these products.
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Affiliation(s)
- Héctor Barbero
- GIR MIOMeT, IU CINQUIMA/Inorganic Chemistry, University of Valladolid, Campus Miguel Delibes, 47011 Valladolid, Spain.
| | - Carlos Díez-Poza
- Department of Organic Chemistry, University of Valladolid, Campus Miguel Delibes, 47011 Valladolid, Spain.
| | - Asunción Barbero
- Department of Organic Chemistry, University of Valladolid, Campus Miguel Delibes, 47011 Valladolid, Spain.
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31
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Liu J, Li XW, Guo YW. Recent Advances in the Isolation, Synthesis and Biological Activity of Marine Guanidine Alkaloids. Mar Drugs 2017; 15:E324. [PMID: 29064383 PMCID: PMC5666430 DOI: 10.3390/md15100324] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 10/10/2017] [Accepted: 10/16/2017] [Indexed: 01/13/2023] Open
Abstract
Marine organisms are prolific resources of guanidine-containing natural products with intriguing structures and promising biological activities. These molecules have therefore attracted the attention of chemists and biologists for their further studies towards potential drug leads. This review focused on the guanidine alkaloids derived from marine sources and discussed the recent progress on their isolation, synthesis and biological activities, covering the literature from the year 2010 to the present.
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Affiliation(s)
- Jin Liu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China.
- Nano Science and Technology Institute, University of Science and Technology of China, 166 Ren Ai Road, Suzhou 215123, China.
| | - Xu-Wen Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China.
| | - Yue-Wei Guo
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China.
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32
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Herath AK, Bhandari MR, Gout D, Yousufuddin M, Lovely CJ. Thio acid-mediated conversion of azides to amides - exploratory studies en route to oroidin alkaloids. Tetrahedron Lett 2017; 58:3913-3918. [PMID: 29808077 DOI: 10.1016/j.tetlet.2017.08.050] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The utility of the thio acid-azide coupling reaction to afford amides is explored in imidazole-containing substrates for application in the total synthesis of examples of oroidin alkaloids. Good yields of the expected amides are obtained in both monomeric and dimeric substrates. Bis azides react preferentially at the 2-azido position but hydrosulfenylation and reduction interfere. 2-Thiophenyl and 2-oxo groups were evaluated as 2-amino surrogates, the thioether delivered the expected amide, whereas 2-imidazolone gave a mixture of the expected amide and the hydrosulfenylation product.
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Affiliation(s)
- Apsara K Herath
- Department of Chemistry and Biochemistry, 700 Planetarium Place, University of Texas at Arlington, TX 76019, USA
| | - Manoj R Bhandari
- Department of Chemistry and Biochemistry, 700 Planetarium Place, University of Texas at Arlington, TX 76019, USA
| | - Delphine Gout
- Department of Chemistry and Biochemistry, 700 Planetarium Place, University of Texas at Arlington, TX 76019, USA.,Life and Health Sciences Department, 7400 University Hills Blvd, University of North Texas at Dallas, Dallas, TX 75241, USA
| | - Muhammed Yousufuddin
- Life and Health Sciences Department, 7400 University Hills Blvd, University of North Texas at Dallas, Dallas, TX 75241, USA
| | - Carl J Lovely
- Department of Chemistry and Biochemistry, 700 Planetarium Place, University of Texas at Arlington, TX 76019, USA
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33
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Peterson LJ, Luo J, Wolfe JP. Synthesis of Cyclic Guanidines Bearing N-Arylsulfonyl and N-Cyano Protecting Groups via Pd-Catalyzed Alkene Carboamination Reactions. Org Lett 2017; 19:2817-2820. [PMID: 28534637 PMCID: PMC5674782 DOI: 10.1021/acs.orglett.7b00946] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Palladium-catalyzed carboamination reactions of N-allylguanidines bearing cleavable N-cyano or N-arylsulfonyl protecting groups are described. The reactions afford cyclic guanidine products in good yield, and transformations of substrates bearing internal alkenes proceed with high diastereoselectivity. Deuterium labeling studies indicate these transformations proceed via anti-aminopalladation pathways.
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Affiliation(s)
- Luke J. Peterson
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | - Jingyi Luo
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | - John P. Wolfe
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
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34
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Shi Y, Moazami Y, Pierce JG. Structure, synthesis and biological properties of the pentacyclic guanidinium alkaloids. Bioorg Med Chem 2017; 25:2817-2824. [PMID: 28404523 PMCID: PMC5494716 DOI: 10.1016/j.bmc.2017.03.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 03/05/2017] [Accepted: 03/07/2017] [Indexed: 11/23/2022]
Abstract
The pentacyclic guanidinium alkaloids (PGAs) are a family of marine natural products that possess a polycyclic guanidine-containing core and a long alkyl chain tethered spermidine-derived tail that is rarely observed in other natural products. These natural products exhibit potent activities on a wide range of organisms and therefore have attracted the attention of many synthetic chemists; however, the structure-activity relationships and mechanisms of action of PGAs remain largely elusive. Herein we summarize the structure, synthesis, toxicity and mechanisms of action of PGAs and highlight their potential as chemical probes and/or therapeutic leads.
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Affiliation(s)
- Yunlong Shi
- Department of Chemistry, NC State University, Raleigh, NC 27695, United States
| | - Yasamin Moazami
- Department of Chemistry, NC State University, Raleigh, NC 27695, United States
| | - Joshua G Pierce
- Department of Chemistry, NC State University, Raleigh, NC 27695, United States; Comparative Medicine Institute, NC State University, Raleigh, NC 27695, United States.
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35
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Abstract
Covering: July 2012 to June 2015. Previous review: Nat. Prod. Rep., 2013, 30, 869-915The structurally diverse imidazole-, oxazole-, and thiazole-containing secondary metabolites are widely distributed in terrestrial and marine environments, and exhibit extensive pharmacological activities. In this review the latest progress involving the isolation, biological activities, and chemical and biogenetic synthesis studies on these natural products has been summarized.
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Affiliation(s)
- Zhong Jin
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China. and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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36
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Ma Z, You L, Chen C. Stereocontrolled Formation of a [4.4]Heterospiro Ring System with Unexpected Inversion of Configuration at the Spirocenter. J Org Chem 2017; 82:731-736. [PMID: 27933858 PMCID: PMC5527678 DOI: 10.1021/acs.joc.6b02266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Stereoselective construction of the 1,3-diazaspiro[4.4]nonane core skeleton of massadine and related dimeric pyrrole-imidazole alkaloids is a synthetic challenge. We describe herein the synthesis of all C13/14 diastereomers of this spiro molecule through controlled oxidation and epimerization of the C13 spirocenter under mild acidic conditions.
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Affiliation(s)
| | - Lin You
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Chuo Chen
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
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37
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Berlinck RGS, Bertonha AF, Takaki M, Rodriguez JPG. The chemistry and biology of guanidine natural products. Nat Prod Rep 2017; 34:1264-1301. [DOI: 10.1039/c7np00037e] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The chemistry and biology of natural guanidines isolated from microbial culture media, from marine invertebrates, as well as from terrestrial plants and animals, are reviewed.
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Affiliation(s)
| | - Ariane F. Bertonha
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
| | - Mirelle Takaki
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
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38
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Mailyan AK, Young K, Chen JL, Reid BT, Zakarian A. Stereoselective Synthesis of Cyclic Guanidines by Directed Diamination of Unactivated Alkenes. Org Lett 2016; 18:5532-5535. [PMID: 27778502 PMCID: PMC5598158 DOI: 10.1021/acs.orglett.6b02778] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A method for a directed stereoselective guanidinylation of alkenes is described. The guanidine unit can be delivered as an intact fragment by a hydroxy or carboxy group, usually with a high level of stereocontrol. After the guanidine delivery, the directing group can be cleaved under exceptionally mild conditions, typically by alcoholysis in the presence of acetic acid. Broad functional group tolerance and mild reaction conditions for the cycloguanidilation suggest applications in medicinal chemistry and natural products synthesis.
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Affiliation(s)
- Artur K. Mailyan
- Department of Chemistry and Biochemsitry, University of California, Santa Barbara, California 93110, United States
| | - Kyle Young
- Department of Chemistry and Biochemsitry, University of California, Santa Barbara, California 93110, United States
| | - Joanna L. Chen
- Department of Chemistry and Biochemsitry, University of California, Santa Barbara, California 93110, United States
| | - Bradley T. Reid
- Department of Chemistry and Biochemsitry, University of California, Santa Barbara, California 93110, United States
| | - Armen Zakarian
- Department of Chemistry and Biochemsitry, University of California, Santa Barbara, California 93110, United States
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39
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Goldberg M, Sartakov D, Bats JW, Bolte M, Göbel MW. A chiral analog of the bicyclic guanidine TBD: synthesis, structure and Brønsted base catalysis. Beilstein J Org Chem 2016; 12:1870-1876. [PMID: 27829893 PMCID: PMC5082680 DOI: 10.3762/bjoc.12.176] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 08/03/2016] [Indexed: 11/29/2022] Open
Abstract
Starting from (S)-β-phenylalanine, easily accessible by lipase-catalyzed kinetic resolution, a chiral triamine was assembled by a reductive amination and finally cyclized to form the title compound 10. In the crystals of the guanidinium benzoate salt the six membered rings of 10 adopt conformations close to an envelope with the phenyl substituents in pseudo-axial positions. The unprotonated guanidine 10 catalyzes Diels–Alder reactions of anthrones and maleimides (25–30% ee). It also promotes as a strong Brønsted base the retro-aldol reaction of some cycloadducts with kinetic resolution of the enantiomers. In three cases, the retro-aldol products (48–83% ee) could be recrystallized to high enantiopurity (≥95% ee). The absolute configuration of several compounds is supported by anomalous X-ray diffraction and by chemical correlation.
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Affiliation(s)
- Mariano Goldberg
- Institute for Organic Chemistry and Chemical Biology, Goethe University Frankfurt, Max-von-Laue-Straße 7, D-60438 Frankfurt am Main, Germany
| | - Denis Sartakov
- Institute for Organic Chemistry and Chemical Biology, Goethe University Frankfurt, Max-von-Laue-Straße 7, D-60438 Frankfurt am Main, Germany
| | - Jan W Bats
- Institute for Organic Chemistry and Chemical Biology, Goethe University Frankfurt, Max-von-Laue-Straße 7, D-60438 Frankfurt am Main, Germany
| | - Michael Bolte
- Institute for Inorganic and Analytical Chemistry, Goethe University Frankfurt, Max-von-Laue-Straße 7, D-60438 Frankfurt am Main, Germany
| | - Michael W Göbel
- Institute for Organic Chemistry and Chemical Biology, Goethe University Frankfurt, Max-von-Laue-Straße 7, D-60438 Frankfurt am Main, Germany
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40
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Wang C, Oki M, Nishikawa T, Harada D, Yotsu-Yamashita M, Nagasawa K. Total Synthesis of 11-Saxitoxinethanoic Acid and Evaluation of its Inhibitory Activity on Voltage-Gated Sodium Channels. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604155] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chao Wang
- Department of Biotechnology and Life Science, Faculty of Technology; Tokyo University of Agriculture and Technology; 2-24-16 Nakamachi, Koganei Tokyo 184-8588 Japan
| | - Mana Oki
- Department of Biotechnology and Life Science, Faculty of Technology; Tokyo University of Agriculture and Technology; 2-24-16 Nakamachi, Koganei Tokyo 184-8588 Japan
| | - Toru Nishikawa
- Department of Biotechnology and Life Science, Faculty of Technology; Tokyo University of Agriculture and Technology; 2-24-16 Nakamachi, Koganei Tokyo 184-8588 Japan
| | - Daisuke Harada
- Department of Biotechnology and Life Science, Faculty of Technology; Tokyo University of Agriculture and Technology; 2-24-16 Nakamachi, Koganei Tokyo 184-8588 Japan
| | - Mari Yotsu-Yamashita
- Graduate School of Agricultural Science; Tohoku University; 1-1 Tsutsumidori-Amamiya Aoba-ku Sendai 981-8555 Japan
| | - Kazuo Nagasawa
- Department of Biotechnology and Life Science, Faculty of Technology; Tokyo University of Agriculture and Technology; 2-24-16 Nakamachi, Koganei Tokyo 184-8588 Japan
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41
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Wang C, Oki M, Nishikawa T, Harada D, Yotsu-Yamashita M, Nagasawa K. Total Synthesis of 11-Saxitoxinethanoic Acid and Evaluation of its Inhibitory Activity on Voltage-Gated Sodium Channels. Angew Chem Int Ed Engl 2016; 55:11600-3. [DOI: 10.1002/anie.201604155] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 06/17/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Chao Wang
- Department of Biotechnology and Life Science, Faculty of Technology; Tokyo University of Agriculture and Technology; 2-24-16 Nakamachi, Koganei Tokyo 184-8588 Japan
| | - Mana Oki
- Department of Biotechnology and Life Science, Faculty of Technology; Tokyo University of Agriculture and Technology; 2-24-16 Nakamachi, Koganei Tokyo 184-8588 Japan
| | - Toru Nishikawa
- Department of Biotechnology and Life Science, Faculty of Technology; Tokyo University of Agriculture and Technology; 2-24-16 Nakamachi, Koganei Tokyo 184-8588 Japan
| | - Daisuke Harada
- Department of Biotechnology and Life Science, Faculty of Technology; Tokyo University of Agriculture and Technology; 2-24-16 Nakamachi, Koganei Tokyo 184-8588 Japan
| | - Mari Yotsu-Yamashita
- Graduate School of Agricultural Science; Tohoku University; 1-1 Tsutsumidori-Amamiya Aoba-ku Sendai 981-8555 Japan
| | - Kazuo Nagasawa
- Department of Biotechnology and Life Science, Faculty of Technology; Tokyo University of Agriculture and Technology; 2-24-16 Nakamachi, Koganei Tokyo 184-8588 Japan
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42
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Design and synthesis of fused tetrahydroisoquinoline-iminoimidazolines. Eur J Med Chem 2015; 106:15-25. [DOI: 10.1016/j.ejmech.2015.10.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 10/14/2015] [Accepted: 10/15/2015] [Indexed: 01/02/2023]
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43
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Namba K, Takeuchi K, Kaihara Y, Oda M, Nakayama A, Nakayama A, Yoshida M, Tanino K. Total synthesis of palau'amine. Nat Commun 2015; 6:8731. [PMID: 26530707 PMCID: PMC4667646 DOI: 10.1038/ncomms9731] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 09/25/2015] [Indexed: 11/09/2022] Open
Abstract
Palau'amine has received a great deal of attention in the past two decades as an attractive synthetic target by virtue of its intriguing molecular architecture and significant immunosuppressive activity. Here we report the total synthesis of palau'amine characterized by the construction of an ABDE tetracyclic ring core including a trans-bicylo[3.3.0]octane skeleton at a middle stage of total synthesis. The ABDE tetracyclic ring core is constructed by a cascade reaction of a cleavage of the N-N bond, including simultaneous formation of imine, the addition of amide anion to the resulting imine (D-ring formation) and the condensation of pyrrole with methyl ester (B-ring formation) in a single step. The synthetic palau'amine is confirmed to exhibit excellent immunosuppressive activity. The present synthetic route has the potential to help elucidate a pharmacophore as well as the mechanistic details of immunosuppressive activity.
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Affiliation(s)
- Kosuke Namba
- Department of Pharmaceutical Science, Tokushima University, 1-78 Shomachi, Tokushima 770-8505, Japan
| | - Kohei Takeuchi
- Department of Pharmaceutical Science, Tokushima University, 1-78 Shomachi, Tokushima 770-8505, Japan.,Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
| | - Yukari Kaihara
- Department of Chemistry, Faculty of Science, Hokkaido University, Kita-ku, Sapporo 060-0810, Japan
| | - Masataka Oda
- Graduate School of Medical and Dental Sciences, Niigata University, Chuo-ku, Niigata 951-8514, Japan
| | - Akira Nakayama
- Catalysis Research Center, Hokkaido University, Sapporo 001-0021, Japan
| | - Atsushi Nakayama
- Department of Pharmaceutical Science, Tokushima University, 1-78 Shomachi, Tokushima 770-8505, Japan
| | - Masahiro Yoshida
- Department of Pharmaceutical Science, Tokushima University, 1-78 Shomachi, Tokushima 770-8505, Japan
| | - Keiji Tanino
- Department of Chemistry, Faculty of Science, Hokkaido University, Kita-ku, Sapporo 060-0810, Japan
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44
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Abstract
The carbocyclic core of massadine has been synthesized relying on a stereoselective formal [3 + 2] cycloaddition of lithiumtrimethylsilyldiazomethane with α,β-unsaturated esters to form a Δ(2)-pyrazoline moiety followed by facile N-N bond cleavage. A unique feature of the current approach is the direct installation of the tertiary α-amino center and a β-cyano group in a cis arrangement on the resulting cyclopentane framework via a previously developed formal aminocyanation protocol.
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Affiliation(s)
- Chunrui Sun
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Hyunjin Lee
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Daesung Lee
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, Chicago, Illinois 60607, United States
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45
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Daniel M, Blanchard F, Nocquet-Thibault S, Cariou K, Dodd RH. Halocyclization of Unsaturated Guanidines Mediated by Koser’s Reagent and Lithium Halides. J Org Chem 2015; 80:10624-33. [DOI: 10.1021/acs.joc.5b01750] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Marion Daniel
- Institut de Chimie des Substances
Naturelles, CNRS UPR 2301, Univ. Paris-Sud, Université Paris-Saclay, 1, av. de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Florent Blanchard
- Institut de Chimie des Substances
Naturelles, CNRS UPR 2301, Univ. Paris-Sud, Université Paris-Saclay, 1, av. de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Sophie Nocquet-Thibault
- Institut de Chimie des Substances
Naturelles, CNRS UPR 2301, Univ. Paris-Sud, Université Paris-Saclay, 1, av. de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Kevin Cariou
- Institut de Chimie des Substances
Naturelles, CNRS UPR 2301, Univ. Paris-Sud, Université Paris-Saclay, 1, av. de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Robert H. Dodd
- Institut de Chimie des Substances
Naturelles, CNRS UPR 2301, Univ. Paris-Sud, Université Paris-Saclay, 1, av. de la Terrasse, 91198 Gif-sur-Yvette, France
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46
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Dai Q, Jiang Y, Yu JT, Cheng J. Palladium-catalyzed three-component reaction of N-tosyl hydrazones, isonitriles and amines leading to amidines. Chem Commun (Camb) 2015; 51:16645-7. [PMID: 26426254 DOI: 10.1039/c5cc06771e] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A palladium-catalyzed three-component reaction between N-tosyl hydrazones, aryl isonitriles and amines was developed, leading to amidines in moderate to good yields. This procedure features the rapid construction of amidine frameworks with high diversity and complexity. Ketenimines serve as intermediates, which encounter nucleophilic attack by amines to produce amidines.
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Affiliation(s)
- Qiang Dai
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou, 213164, P. R. China.
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47
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Wang X, Gao Y, Ma Z, Rodriguez RA, Yu ZX, Chen C. Syntheses of Sceptrins and Nakamuric Acid and Insights into the Biosyntheses of Pyrrole-Imidazole Dimers. Org Chem Front 2015; 2:978-984. [PMID: 26328059 PMCID: PMC4551504 DOI: 10.1039/c5qo00165j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Sceptrins and nakamuric acid are structurally unique antibiotics isolated from marine sponges. Recent studies suggest that the biosynthesis of these dimeric pyrrole-imidazole alkaloids involves a single-electron transfer (SET)-promoted [2+2] cycloaddition to form their cyclobutane core skeletons. We describe herein the biomimetic syntheses of racemic sceptrin and nakamuric acid. We also report the asymmetric syntheses of sceptrin, bromosceptrin, and dibromosceptrin in their natural enantiomeric form. We further provide mechanistic insights into the pathway selectivity of the SET-promoted [2+2] and [4+2] cycloadditions that lead to the divergent formation of the sceptrin and ageliferin core skeletons. Both the [2+2] and [4+2] cycloadditions are stepwise reactions, with the [2+2] pathway kinetically and thermodynamically favored over the [4+2] pathway. For the [2+2] cycloaddition, the dimerization of pyrrole-imidazole monomers is rate-limiting, whereas for the [4+2] cycloaddition, the cyclization is the slowest step.
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Affiliation(s)
- Xiaolei Wang
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Yang Gao
- College of Chemistry, Peking University, Beijing 100871, China ; Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Hubei, Wuhan 430079, China
| | - Zhiqiang Ma
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Rodrigo A Rodriguez
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Zhi-Xiang Yu
- College of Chemistry, Peking University, Beijing 100871, China
| | - Chuo Chen
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
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48
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Ray A, Mukherjee S, Das J, Bhandari MK, Du H, Yousufuddin M, Lovely CJ. Preparation and Diels-Alder reactions of 1'-heterosubsituted vinylimidazoles. Tetrahedron Lett 2015; 56:3518-3522. [PMID: 26139945 PMCID: PMC4484863 DOI: 10.1016/j.tetlet.2015.01.190] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
A Diels-Alder/rearrangement sequence has been pursued in our lab en route to a number of oroidin dimers. In order to access the fully substituted core of these molecules, 1',2'-disubstituted 4-vinylimidazoles were required as dienes. The preparation of a series of a 4-vinylimidazoles containing substituents on the vinyl moiety via hydroalumination/electrophilic trapping or hydrosilylation are described. These derivatives undergo Diels-Alder reactions with N-phenylmaleimide to provide the tetrahydrobenzimidazole derivatives. The cycloadducts derived from halosubstituted systems generally undergo elimination, leading to the corresponding dihydrobenzimidazole, whereas the silyl and stannyl derivatives provide the corresponding 4-substituted tetrahydrobenzimidazole.
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Affiliation(s)
- Abhisek Ray
- Department of Chemistry and Biochemistry, The University of Texas at Arlington,
Arlington, Texas 76019-0065, USA
| | - Sabuj Mukherjee
- Department of Chemistry and Biochemistry, The University of Texas at Arlington,
Arlington, Texas 76019-0065, USA
| | - Jayanta Das
- Department of Chemistry and Biochemistry, The University of Texas at Arlington,
Arlington, Texas 76019-0065, USA
| | - Manoj K. Bhandari
- Department of Chemistry and Biochemistry, The University of Texas at Arlington,
Arlington, Texas 76019-0065, USA
| | - Hongwang Du
- Department of Chemistry and Biochemistry, The University of Texas at Arlington,
Arlington, Texas 76019-0065, USA
| | - Muhammed Yousufuddin
- Department of Chemistry and Biochemistry, The University of Texas at Arlington,
Arlington, Texas 76019-0065, USA
| | - Carl J. Lovely
- Department of Chemistry and Biochemistry, The University of Texas at Arlington,
Arlington, Texas 76019-0065, USA
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49
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Christmann M, Hu J, Kitamura M, Stoltz B. Tetrahedron reports on organic chemistry. Tetrahedron 2015. [DOI: 10.1016/s0040-4020(15)00744-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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50
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Abstract
Monanchocidin A is a recently isolated pentacyclic guanidinium alkaloid that contains an unusual highly oxidized morpholinone fragment. Herein we report a rapid synthesis of this heterocyclic scaffold and confirm its structure. The key reaction involves an acid promoted hemiketalization/hemiaminalization of an α-hydroxyamide and α-ketoaldehyde that proceeds with exclusive regioselectivity and high diastereoselectivity to form the natural scaffold in moderate to high yield.
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Affiliation(s)
- Yunlong Shi
- Department of Chemistry, North Carolina State University , Raleigh, North Carolina 27695, United States
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