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Kitayama S, Shimizu H, Yokoshima S. Photoinduced rearrangement of α-(2-nitrophenyl)ketones. Org Biomol Chem 2022; 20:7896-7899. [PMID: 36177995 DOI: 10.1039/d2ob01546c] [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
Photoirradiation of α-(2-nitrophenyl)ketones produced cyclic hydroxamates. The reaction proceeded via photoinduced oxygen transfer from the nitro group to the benzylic position, forming an α-hydroxyketone having a nitroso group. Subsequent addition of the nitroso group to the ketone moiety and the concomitant cleavage of the C-C σ bond between the carbonyl group and the benzyl position produced hydroxamic acid, which underwent formation of a hemiacetal to give cyclic hydroxamate.
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Affiliation(s)
- Shinnosuke Kitayama
- Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya 464-8601, Japan.
| | - Hiroaki Shimizu
- Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya 464-8601, Japan.
| | - Satoshi Yokoshima
- Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya 464-8601, Japan.
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2
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Yamaguchi K, Shimizu T, Miura A, Ishida K, Kusama H. Photoinduced Intramolecular Cyclization of Acylsilanes Bearing a Boronate Moiety: Construction of a Highly Strained trans-Fused Bicyclo[3.3.0]octane Skeleton. Org Lett 2022; 24:5807-5811. [PMID: 35920627 DOI: 10.1021/acs.orglett.2c02337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A reliable strategy for the construction of trans-fused bicyclo[n.3.0] skeletons was explored by utilizing photoinduced cyclization of acylsilanes bearing a boronate. The substrates having an acylsilane and a boronate in a 1,2-trans relationship were prepared via hydroboration of cycloalkene derivatives. The desired cyclization was efficiently promoted by photoirradiation to give the trans-fused bicyclo[n.3.0] derivatives as a single diastereomer. It is noteworthy that this methodology enables the efficient construction of a highly strained trans-5-5 ring system.
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Affiliation(s)
- Kohei Yamaguchi
- Department of Chemistry, Faculty of Science, Gakushuin University, Tokyo 171-8588, Japan
| | - Tsukasa Shimizu
- Department of Chemistry, Faculty of Science, Gakushuin University, Tokyo 171-8588, Japan
| | - Arihito Miura
- Department of Chemistry, Faculty of Science, Gakushuin University, Tokyo 171-8588, Japan
| | - Kento Ishida
- Department of Chemistry, Faculty of Science, Gakushuin University, Tokyo 171-8588, Japan
| | - Hiroyuki Kusama
- Department of Chemistry, Faculty of Science, Gakushuin University, Tokyo 171-8588, Japan
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3
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Shivam, Tiwari G, Kumar M, Chauhan ANS, Erande RD. Recent advances in cascade reactions and their mechanistic insights: a concise strategy to synthesize complex natural products and organic scaffolds. Org Biomol Chem 2022; 20:3653-3674. [PMID: 35416224 DOI: 10.1039/d2ob00452f] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The beauty of cascade reactions to bestow us with cumbersome organic scaffolds has made them a cutting-edge area of research. Although the planning of cascades may require intuition, their results can be highly impactful. The development of cascades to provide specific targeted molecules of an appropriate structural and stereochemical framework poses a significant challenge but can serve as one of the most impressive tools in organic synthesis. This review shares a broad interest in compiling cascade transformations towards the construction of polycyclic frameworks, induction of chirality/asymmetry in the protocol, etc. to solve diverse challenges in organic synthesis pursuits, as cascades enable the rapid and efficient construction of complex architectures from simple molecules. The studies highlighted herein manifest the utilization of a range of cascade reactions under various classifications for generating natural product skeletons such as palau'amine, benzosimuline, arcutinine, and others from simple building blocks, with emphasis on breakthroughs and potential for asymmetric synthesis. The exquisite synthetic designs of recently completed total synthesis of natural products with a focus on strategic concerns are also highlighted in this review.
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Affiliation(s)
- Shivam
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur-342037, India.
| | - Geetika Tiwari
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur-342037, India.
| | - Manish Kumar
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur-342037, India.
| | | | - Rohan D Erande
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur-342037, India.
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4
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Wannenmacher N, Heberle M, Yu X, Demircan A, Wanner DM, Pfeffer C, Peters R. Diastereospecific Enantiodivergent Allylation of Pyrazolones as an Entry to β‐Aminoamides. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200185] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Nick Wannenmacher
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Martin Heberle
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Xin Yu
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Aysegül Demircan
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Daniel M. Wanner
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Camilla Pfeffer
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - René Peters
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart Germany
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5
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Yang M, Huang D, Wang K, Han T, Zhao P, Wang F, Wang J, Su Y, Hu Y. Silver-Catalyzed Synthesis of CF 3-Substituted 2-Imidazolines. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202111009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Yang M, Ye B, Chen J, Wu J. Visible-light Photocatalytic Alkylsulfonylation of Aroylhydrazides with Alkylsulfonyl Radicals. ACTA CHIMICA SINICA 2022. [DOI: 10.6023/a21100457] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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7
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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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8
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Zhang W, Li L, Li CC. Synthesis of natural products containing highly strained trans-fused bicyclo[3.3.0]octane: historical overview and future prospects. Chem Soc Rev 2021; 50:9430-9442. [PMID: 34286715 DOI: 10.1039/d0cs01471k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Owing to high strain energy, molecules with trans-fused bicyclo[3.3.0]octane ring systems are very difficult to synthesize, and there are very few approaches to access them. Recently, a number of natural products with such ring systems have been made by the synthetic community. However, there has been no review in this field before. This review provides a systematic and comprehensive discussion on the synthesis of natural products containing trans-fused bicyclo[3.3.0]octanes and the historical context of this work. The prospects for future research in this field are also discussed. Covering the literature before 2021, this review aims to offer a helpful reference for total synthesis of highly strained natural products containing trans-fused bicyclo[3.3.0]octane ring systems.
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Affiliation(s)
- Wen Zhang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China.
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9
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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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10
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Antimalarial Activity of Sea Sponge Extract of Stylissa massa originating from waters of Rote Island. JURNAL KIMIA SAINS DAN APLIKASI 2021. [DOI: 10.14710/jksa.24.4.136-145] [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] Open
Abstract
Research on the isolation, toxicity test, antimalarial test, and identification of the active compound from the ethyl acetate fraction of Stylissa massa sponge from Oenggae waters, Rote Island, has been conducted. This study aimed to investigate the antimalarial activity of the ethyl acetate fraction of the Stylissa massa sponge. Isolation was carried out by the extraction method using a mixed solvent of methanol: dichloromethane of 3: 2 (v/v), then the extract was partitioned in a solvent mixture of ethyl acetate: water of 1: 2 (v/v). The ethyl acetate extract obtained was separated by column chromatography using the gradient polarity system method. The toxicity test of each fraction was carried out by the Brine Shrimp Lethality Test (BSLT) method, and the antimalarial test was carried out by the haematin polymerization inhibition method. Identification of compounds from the active fraction in the antimalarial test was carried out using Liquid Chromatography-Mass Spectrometry (LC-MS). The extraction yield was 1.14 g (0.23%) of the ethyl acetate extract in the form of a dark brownish-yellow oily solid. Separation by column chromatography resulted in 15 fractions. Toxicity test results showed the four most active fractions with LC50 values, which are very promising for new drug discovery. The IC50 value in the antimalarial activity test of the four fractions indicated that the Stylissa massa sponge ethyl acetate extract was more active than the standard chloroquine compound (115 μg/mL). The LC-MS analysis indicates that fraction 11 contains two compounds that have been reported, and 1 compound is unknown. In contrast, fraction 14 indicates that it contains three compounds that have been reported and one unknown compound.
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11
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Zhang W, Zhou ZX, Zhu XJ, Sun ZH, Dai WM, Li CC. Asymmetric Total Synthesis of the Highly Strained 4β-Acetoxyprobotryane-9β,15α-diol. J Am Chem Soc 2020; 142:19868-19873. [DOI: 10.1021/jacs.0c10116] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Wen Zhang
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Zi-Xiong Zhou
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xu-Jiang Zhu
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Zhang-Hua Sun
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Wei-Min Dai
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
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12
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Berlinck RGS, Bernardi DI, Fill T, Fernandes AAG, Jurberg ID. The chemistry and biology of guanidine secondary metabolites. Nat Prod Rep 2020; 38:586-667. [PMID: 33021301 DOI: 10.1039/d0np00051e] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Covering: 2017-2019Guanidine natural products isolated from microorganisms, marine invertebrates and terrestrial plants, amphibians and spiders, represented by non-ribosomal peptides, guanidine-bearing polyketides, alkaloids, terpenoids and shikimic acid derived, are the subject of this review. The topics include the discovery of new metabolites, total synthesis of natural guanidine compounds, biological activity and mechanism-of-action, biosynthesis and ecological functions.
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Affiliation(s)
- Roberto G S Berlinck
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil.
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13
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Jovanovic M, Petkovic M, Jovanovic P, Simic M, Tasic G, Eric S, Savic V. Proline Derived Bicyclic Derivatives through Metal Catalysed Cyclisations of Allenes: Synthesis of Longamide B, Stylisine D and their Derivatives. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901554] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Milos Jovanovic
- Faculty of Pharmacy; Department of Organic Chemistry; University of Belgrade; Vojvode Stepe 450 11221 Belgrade Serbia
| | - Milos Petkovic
- Faculty of Pharmacy; Department of Organic Chemistry; University of Belgrade; Vojvode Stepe 450 11221 Belgrade Serbia
| | - Predrag Jovanovic
- Faculty of Pharmacy; Department of Organic Chemistry; University of Belgrade; Vojvode Stepe 450 11221 Belgrade Serbia
| | - Milena Simic
- Faculty of Pharmacy; Department of Organic Chemistry; University of Belgrade; Vojvode Stepe 450 11221 Belgrade Serbia
| | - Gordana Tasic
- Faculty of Pharmacy; Department of Organic Chemistry; University of Belgrade; Vojvode Stepe 450 11221 Belgrade Serbia
| | - Slavica Eric
- Faculty of Pharmacy; Department of Pharmaceutical Chemistry; University of Belgrade; Vojvode Stepe 450 11221 Belgrade Serbia
| | - Vladimir Savic
- Faculty of Pharmacy; Department of Organic Chemistry; University of Belgrade; Vojvode Stepe 450 11221 Belgrade Serbia
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14
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15
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Yang K, Gao JJ, Luo SH, Wu HQ, Pang CM, Wang BW, Chen XY, Wang ZY. Quick construction of a C–N bond from arylsulfonyl hydrazides and Csp2–X compounds promoted by DMAP at room temperature. RSC Adv 2019; 9:19917-19923. [PMID: 35514736 PMCID: PMC9065325 DOI: 10.1039/c9ra03403j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 06/17/2019] [Indexed: 01/16/2023] Open
Abstract
A mild C–N coupling reaction with arylsulfonyl hydrazides and 2(5H)-furanones shows good yields, excellent reaction regioselectivity and functional group tolerance.
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Affiliation(s)
- Kai Yang
- College of Pharmacy
- Gannan Medical University
- Ganzhou
- P. R. China
- School of Chemistry and Environment
| | - Juan-Juan Gao
- College of Sports and Rehabilitation
- Gannan Medical University
- Ganzhou
- P. R. China
| | - Shi-He Luo
- School of Chemistry and Environment
- South China Normal University
- Key Laboratory of Theoretical Chemistry of Environment
- Ministry of Education
- Guangzhou
| | - Han-Qing Wu
- School of Chemistry and Environment
- South China Normal University
- Key Laboratory of Theoretical Chemistry of Environment
- Ministry of Education
- Guangzhou
| | - Chu-Ming Pang
- School of Chemistry and Environment
- South China Normal University
- Key Laboratory of Theoretical Chemistry of Environment
- Ministry of Education
- Guangzhou
| | - Bo-Wen Wang
- School of Chemistry and Environment
- South China Normal University
- Key Laboratory of Theoretical Chemistry of Environment
- Ministry of Education
- Guangzhou
| | - Xiao-Yun Chen
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang
- P. R. China
| | - Zhao-Yang Wang
- School of Chemistry and Environment
- South China Normal University
- Key Laboratory of Theoretical Chemistry of Environment
- Ministry of Education
- Guangzhou
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16
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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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17
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Fan T, Wang A, Li JQ, Ye JL, Zheng X, Huang PQ. Versatile One-Pot Synthesis of Polysubstituted Cyclopent-2-enimines from α,β-Unsaturated Amides: Imino-Nazarov Reaction. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805641] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ting Fan
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 P. R. China
| | - Ao Wang
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 P. R. China
| | - Jia-Qi Li
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 P. R. China
| | - Jian-Liang Ye
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 P. R. China
| | - Xiao Zheng
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 P. R. China
| | - Pei-Qiang Huang
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 P. R. China
- State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 P. R. China
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18
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Fan T, Wang A, Li JQ, Ye JL, Zheng X, Huang PQ. Versatile One-Pot Synthesis of Polysubstituted Cyclopent-2-enimines from α,β-Unsaturated Amides: Imino-Nazarov Reaction. Angew Chem Int Ed Engl 2018; 57:10352-10356. [PMID: 29924902 DOI: 10.1002/anie.201805641] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Indexed: 01/03/2023]
Abstract
The imino-Nazarov cyclization of the polysubstituted pentan-1,4-diene-3-imines was realized. To this aim, a one-pot procedure involving reductive alkenyliminylation of α,β-unsaturated secondary amides with potassium organotrifluoroborates, followed by acid-catalyzed imino-Nazarov cyclization of the polysubstituted pentan-1,4-diene-3-imine intermediates, was studied systematically. This mild, operationally simple, flexible, and high-yielding protocol efficiently affords polysubstituted pentan-1,4-diene-3-imines, cyclopentenimines, and α-amino cyclopentenones, which are useful scaffolds in organic synthesis. The substituent effect at the C2 position of the polysubstituted pentan-1,4-diene-3-imines was studied by means of density-functional theory calculations. Results suggested that the electron-donating group facilitates the imino-Nazarov cyclization process.
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Affiliation(s)
- Ting Fan
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Ao Wang
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Jia-Qi Li
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Jian-Liang Ye
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Xiao Zheng
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Pei-Qiang Huang
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China
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19
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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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20
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Imaoka T, Iwata M, Nagasawa K. Synthesis of a Quaternary N
,N′
-Aminal-Containing A-E Ring System of Palau′amine via an Enamide-Type Overman Rearrangement Reaction. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800086] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Takuya Imaoka
- Graduate School of Technology; Tokyo University of Agriculture and Technology; 2-24-16, Naka-cho 184-8588, Tokyo Koganei Japan
| | - Makoto Iwata
- Graduate School of Technology; Tokyo University of Agriculture and Technology; 2-24-16, Naka-cho 184-8588, Tokyo Koganei Japan
| | - Kazuo Nagasawa
- Graduate School of Technology; Tokyo University of Agriculture and Technology; 2-24-16, Naka-cho 184-8588, Tokyo Koganei Japan
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21
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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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22
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Ding H, Roberts AG, Chiang R, Harran PG. Cascading Auto-oxidative Biproline Guanylations Form Optically Active Dispacamide Dimers and Permit an Eight-Step Synthesis of (−)-Ageliferin. J Org Chem 2018; 83:7231-7238. [DOI: 10.1021/acs.joc.8b00631] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hui Ding
- Department of Chemistry & Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Andrew G. Roberts
- Department of Chemistry & Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Rocky Chiang
- Department of Chemistry & Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Patrick G. Harran
- Department of Chemistry & Biochemistry, University of California, Los Angeles, California 90095, United States
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23
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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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24
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Sandoval C, Lim NK, Zhang H. Two-Step Synthesis of 3,4-Dihydropyrrolopyrazinones from Ketones and Piperazin-2-ones. Org Lett 2018; 20:1252-1255. [PMID: 29406723 DOI: 10.1021/acs.orglett.8b00197] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An expedient two-step synthesis of 3,4-dihydropyrrolopyrazinones has been achieved via a Vilsmeier-Haack reaction of ketones, followed by an annulation of the corresponding chloroaldehydes with commercially available piperazin-2-ones. A variety of cyclic and acyclic ketones and piperazin-2-ones participated in this two-step chemistry, affording the desired 3,4-dihydropyrrolopyrazinones in up to 78% yield.
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Affiliation(s)
- Cosme Sandoval
- Department of Small Molecule Process Chemistry, Genentech Inc. , 1 DNA Way, South San Francisco, California 94080, United States
| | - Ngiap-Kie Lim
- Department of Small Molecule Process Chemistry, Genentech Inc. , 1 DNA Way, South San Francisco, California 94080, United States
| | - Haiming Zhang
- Department of Small Molecule Process Chemistry, Genentech Inc. , 1 DNA Way, South San Francisco, California 94080, United States
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25
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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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Abstract
Covering: 2015. Previous review: Nat. Prod. Rep., 2016, 33, 382-431This review covers the literature published in 2015 for marine natural products (MNPs), with 1220 citations (792 for the period January to December 2015) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1340 in 429 papers for 2015), together with the relevant biological activities, source organisms and country of origin. Reviews, biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included.
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Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
| | - Brent R Copp
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Robert A Keyzers
- Centre for Biodiscovery, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
| | - Murray H G Munro
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
| | - Michèle R Prinsep
- Chemistry, School of Science, University of Waikato, Hamilton, New Zealand
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27
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Hu P, Snyder SA. Enantiospecific Total Synthesis of the Highly Strained (−)-Presilphiperfolan-8-ol via a Pd-Catalyzed Tandem Cyclization. J Am Chem Soc 2017; 139:5007-5010. [DOI: 10.1021/jacs.7b01454] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Pengfei Hu
- Department
of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
- Department
of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Scott A. Snyder
- Department
of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
- Department
of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
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28
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29
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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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30
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Iwata M, Kamijoh Y, Yamamoto E, Yamanaka M, Nagasawa K. Total Synthesis of Pyrrole–Imidazole Alkaloid (+)-Cylindradine B. Org Lett 2017; 19:420-423. [DOI: 10.1021/acs.orglett.6b03722] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Makoto Iwata
- Department
of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei
City, Tokyo 184-8588, Japan
| | - Yuko Kamijoh
- Department
of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei
City, Tokyo 184-8588, Japan
| | - Eri Yamamoto
- Department
of Chemistry, Faculty of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| | - Masahiro Yamanaka
- Department
of Chemistry, Faculty of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| | - Kazuo Nagasawa
- Department
of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei
City, Tokyo 184-8588, Japan
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31
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Lindel T. Chemistry and Biology of the Pyrrole–Imidazole Alkaloids. THE ALKALOIDS: CHEMISTRY AND BIOLOGY 2017; 77:117-219. [DOI: 10.1016/bs.alkal.2016.12.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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32
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Affiliation(s)
- Kosuke Namba
- Graduate School of Biomedical Sciences, Tokushima University
| | | | | | - Keiji Tanino
- Department of Chemistry, Faculty of Science, Hokkaido University
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33
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Ma Z, Wang X, Ma Y, Chen C. Asymmetric Synthesis of Axinellamines A and B. Angew Chem Int Ed Engl 2016; 55:4763-6. [PMID: 27037993 PMCID: PMC4836294 DOI: 10.1002/anie.201600007] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Revised: 02/05/2016] [Indexed: 11/10/2022]
Abstract
Axinellamines A and B are broad-spectrum antibacterial pyrrole-imidazole alkaloids that have a complex polycyclic skeleton. A new asymmetric synthesis of these marine sponge metabolites is described herein, featuring an oxidative rearrangement and an anchimeric chlorination reaction.
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Affiliation(s)
- Zhiqiang Ma
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Xiao Wang
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
- Department of Chemistry and Biochemistry, The University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Yuyong Ma
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
- Department of Chemistry and Biochemistry, The University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Chuo Chen
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA.
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34
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Affiliation(s)
- Zhiqiang Ma
- Department of Biochemistry The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390 USA
| | - Xiao Wang
- Department of Biochemistry The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390 USA
- Department of Chemistry and Biochemistry The University of California, San Diego 9500 Gilman Drive La Jolla CA 92093 USA
| | - Yuyong Ma
- Department of Biochemistry The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390 USA
- Department of Chemistry and Biochemistry The University of California, San Diego 9500 Gilman Drive La Jolla CA 92093 USA
| | - Chuo Chen
- Department of Biochemistry The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390 USA
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