1
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Neudorffer A, Deschamps P, Largeron M, Deguin B. An electrochemical access to 2-amino-2,3-dihydro-1,4-benzodioxanes derived from hydroxytyrosol. Org Biomol Chem 2024; 22:1057-1063. [PMID: 38205728 DOI: 10.1039/d3ob01858j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
The anodic oxidation of a natural antioxidative catechol, hydroxytyrosol, was developed in an acetonitrile/dimethylsulfoxide (or acetonitrile/water) solvent mixture to produce in a stable way the resulting non-activated o-quinone and generate structural analogues. 2-Amino-2,3-dihydro-1,4-benzodioxane derivatives were obtained as two regioisomers in good to high overall yields (65-90%) and 1 : 3 ratios, through an inverse electron demand Diels-Alder (IEDDA) reaction between the electrogenerated o-quinone and tertiary enamines. The insertion of an electron withdrawing (or electron donating) group on the catechol modified their relative proportions, so that the reaction became regiospecific. With some aliphatic enamines, a competitive 1,6-Michael addition took place, affording 2-hydroxy-1,2,4,5-tetrahydrobenzo[d]oxepine compounds.
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2
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Yang Y, Jiang Y, Du W, Chen Y. Asymmetric Cross [10+2] Cycloadditions of 2‐Alkylidene‐1‐indanones and Activated Alkenes under Phase‐Transfer Catalysis. Chemistry 2020; 26:1754-1758. [PMID: 31777118 DOI: 10.1002/chem.201904930] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 11/22/2019] [Indexed: 01/15/2023]
Affiliation(s)
- Yang Yang
- Key Laboratory of Drug-Targeting and Drug Delivery System of, the Ministry of EducationSichuan Research Center for, Drug Precision Industrial Technology, West China School of PharmacySichuan University Chengdu 610041 P. R. China
| | - Ying Jiang
- Key Laboratory of Drug-Targeting and Drug Delivery System of, the Ministry of EducationSichuan Research Center for, Drug Precision Industrial Technology, West China School of PharmacySichuan University Chengdu 610041 P. R. China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of, the Ministry of EducationSichuan Research Center for, Drug Precision Industrial Technology, West China School of PharmacySichuan University Chengdu 610041 P. R. China
| | - Ying‐Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of, the Ministry of EducationSichuan Research Center for, Drug Precision Industrial Technology, West China School of PharmacySichuan University Chengdu 610041 P. R. China
- College of PharmacyThird Military Medical University Chongqing 400038 P. R. China
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3
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Zang Y, Gong YH, Li XW, Li XN, Liu JJ, Chen CM, Zhou Y, Gu LH, Luo ZW, Wang JP, Sun WG, Zhu HC, Zhang YH. Canescones A–E: aromatic polyketide dimers with PTP1B inhibitory activity from Penicillium canescens. Org Chem Front 2019. [DOI: 10.1039/c9qo00820a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Canescones A–E (1–5), aromatic polyketide dimers bearing unprecedented 5/6/6/6/5 heteropentacyclic ring skeletons with novel scaffolds, were isolated from Penicillium canescens.
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4
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Yamashita S, Terayama K, Ozeki E, Hayashi Y, Hirama M. Synthetic Studies on Presporolide, a Putative Enediyne Precursor of Sporolides. Org Lett 2017; 20:276-279. [DOI: 10.1021/acs.orglett.7b03670] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shuji Yamashita
- Department of Chemistry,
Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Kanae Terayama
- Department of Chemistry,
Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Eri Ozeki
- Department of Chemistry,
Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Yujiro Hayashi
- Department of Chemistry,
Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Masahiro Hirama
- Department of Chemistry,
Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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5
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Ma SY, Xiao YS, Zhang B, Shao FL, Guo ZK, Zhang JJ, Jiao RH, Sun Y, Xu Q, Tan RX, Ge HM. Amycolamycins A and B, Two Enediyne-Derived Compounds from a Locust-Associated Actinomycete. Org Lett 2017; 19:6208-6211. [PMID: 29090939 DOI: 10.1021/acs.orglett.7b03113] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Two novel enediyne-derived natural products, amycolamycins A and B (1 and 2), were characterized from a locust-associated actinomycete Amycolatopsis sp. HCa4. Amycolamycins A and B contain a unique 2-(cyclopenta[a]inden-5-yl)oxirane core with suspected enediyne polyketide biosynthetic origin. Sequencing and analysis of the acm biosynthetic gene cluster allowed us to propose the biosynthetic pathway of 1 and 2. Moreover, amycolamycin A (1) was selectively cytotoxic to the M231 breast cancer cell line.
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Affiliation(s)
- Shi Ying Ma
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
| | - Yong Sheng Xiao
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
| | - Bo Zhang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
| | - Fen Li Shao
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
| | - Zhi Kai Guo
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences , Hainan 571101, China
| | - Juan Juan Zhang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
| | - Rui Hua Jiao
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
| | - Yang Sun
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
| | - Qiang Xu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
| | - Ren Xiang Tan
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China.,State Key Laboratory Cultivation Base for TCM Quality and Efficacy, Nanjing University of Chinese Medicine , Nanjing 210023, China
| | - Hui Ming Ge
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
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6
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Unified biomimetic assembly of voacalgine A and bipleiophylline via divergent oxidative couplings. Nat Chem 2017; 9:793-798. [DOI: 10.1038/nchem.2735] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 01/17/2017] [Indexed: 01/17/2023]
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7
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López J, de la Cruz F, Alcaraz Y, Delgado F, Vázquez MA. Quinoid systems in chemistry and pharmacology. Med Chem Res 2015. [DOI: 10.1007/s00044-015-1412-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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8
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Jensen PR, Moore BS, Fenical W. The marine actinomycete genus Salinispora: a model organism for secondary metabolite discovery. Nat Prod Rep 2015; 32:738-51. [PMID: 25730728 PMCID: PMC4414829 DOI: 10.1039/c4np00167b] [Citation(s) in RCA: 128] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
This review covers the initial discovery of the marine actinomycete genus Salinispora through its development as a model for natural product research. A focus is placed on the novel chemical structures reported with reference to their biological activities and the synthetic and biosynthetic studies they have inspired. The time line of discoveries progresses from more traditional bioassay-guided approaches through the application of genome mining and genetic engineering techniques that target the products of specific biosynthetic gene clusters. This overview exemplifies the extraordinary biosynthetic diversity that can emanate from a narrowly defined genus and supports future efforts to explore marine taxa in the search for novel natural products.
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Affiliation(s)
- Paul R Jensen
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, USA.
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9
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Usui I, Lin DW, Masuda T, Baran PS. Convergent synthesis and structural confirmation of phellodonin and sarcodonin ε. Org Lett 2013; 15:2080-3. [PMID: 23577748 DOI: 10.1021/ol400709f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first synthesis of members of the sarcodonin family, phellodonin and sarcodonin ε, is reported herein. This verifies that the unprecedented and seemingly unstable N,N-dioxide-containing benzodioxazine framework can be constructed in the laboratory and lends further support to the proposed structures. The key step in the synthesis involves a biomimetic hetero-Diels-Alder reaction between a pyrazine N-oxide and an ortho-quinone.
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Affiliation(s)
- Ippei Usui
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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10
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Jean M, Tomasi S, van de Weghe P. When the nine-membered enediynes play hide and seek. Org Biomol Chem 2012; 10:7453-6. [PMID: 22898710 DOI: 10.1039/c2ob26033f] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The lack of stability of the 9-membered enediynes not associated with an apoprotein may explain the low number of isolated natural compounds containing this core. To overcome such a problem, particular attention should be paid during the process of extraction and isolation of secondary metabolites, especially from microorganisms such as actinomycetes in order to identify the non-cycloaromatized derivatives.
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Affiliation(s)
- Mickaël Jean
- Université de Rennes 1, UMR 6226, Institut des Sciences Chimiques de Rennes, Equipe PNSCM, UFR Sciences Biologiques et Pharmaceutiques, 2 avenue du Prof Léon Bernard, F-35043 Rennes Cedex, France
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Nair V, Menon RS, Biju AT, Abhilash KG. 1,2-Benzoquinones in Diels-Alder reactions, dipolar cycloadditions, nucleophilic additions, multicomponent reactions and more. Chem Soc Rev 2011; 41:1050-9. [PMID: 21938275 DOI: 10.1039/c1cs15186j] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A brief account of the recent developments in the chemistry of 1,2-benzoquinones is presented in this tutorial review. The title compounds exhibit commendable versatility in both Diels-Alder and dipolar cycloaddition reactions. They have also been employed as electrophilic reaction partners in nucleophile-triggered catalytic processes and related multicomponent reactions. These, along with other reactions described here, lead to the synthesis of densely functionalised carbocyclic and heterocyclic frameworks that are otherwise difficult to access.
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Affiliation(s)
- Vijay Nair
- Organic Chemistry Section, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695 019, India.
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Abstract
Studies directed towards the synthesis of the architecturally complex marine natural product sporolide B are described. Synthetic analysis suggested advanced hydroquinone and benzodiquinane fragments, which upon elaboration were successfully united via an ester linkage. Macrocyclization studies were then carried out, and although a novel macrocyclization product was obtained, subsequent studies revealed that the tertiary hydroxyls at C(6) and C(10) were sterically encumbered to participate in a successful macrocyclization to furnish sporolide B.
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13
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Nicolaou KC, Wang J, Tang Y, Botta L. Total synthesis of sporolide B and 9-epi-sporolide B. J Am Chem Soc 2010; 132:11350-63. [PMID: 20698702 DOI: 10.1021/ja1048994] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The total synthesis of the structurally unique secondary metabolite sporolide B (1b) is described. The total synthesis of 1b was developed on the basis of preliminary studies that revealed the reactivity of an appropriate o-quinone as a diene system toward a number of indene derivatives as dienophiles, first in intermolecular and thence intramolecular settings. Thus, substrates were devised (37 and 75) that underwent exquisite intramolecular [4+2] cycloaddition reactions under thermal conditions to provide primitive sporolide-type structures that were subsequently elaborated to a sporolide model system, 9-epi-sporolide B, and 1b. The requisite indene o-quinone precursor 75 was synthesized through a ruthenium-catalyzed [2+2+2] cycloaddition reaction between a propargylic alcohol and a chloroacetylenic cyclopentenyne, followed by elaboration and silver-promoted oxidation of the resulting chloroindene derivative. In addition to the total synthesis of 1b, this work demonstrated, for the first time, the power of the intramolecular hetero [4+2] cycloaddition reaction in the total synthesis of complex molecules and the application of the ruthenium-catalyzed [2+2+2] cycloaddition reaction to highly substituted indene systems possessing a chlorine residue on the aromatic nucleus.
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Affiliation(s)
- K C Nicolaou
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.
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14
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Affiliation(s)
- Wenyi Zhao
- Shasun Pharma Solutions, Incorporated, 10 Knightsbridge Road, Pistcataway, New Jersey 08854, USA
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15
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Zeng CC, Ping DW, Hu LM, Song XQ, Zhong RG. Anodic oxidation of catechols in the presence of α-oxoketene N,N-acetals with a tetrahydropyrimidine ring: selective α-arylation reaction. Org Biomol Chem 2010; 8:2465-72. [DOI: 10.1039/c001847c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Li P, Menche D. Cycloadditions in the Total Synthesis of Sporolide B. Angew Chem Int Ed Engl 2009; 48:5078-80. [DOI: 10.1002/anie.200901894] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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18
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Abstract
An ocean of discovery: The first total synthesis of the highly oxygenated, marine-derived, natural product sporolide B has been achieved through a convergent strategy. The key steps involve a ruthenium-catalyzed [2+2+2] cycloaddition to assemble the indene structural motif and a thermally induced Diels-Alder-type reaction to forge the macrocycle (see scheme).
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Affiliation(s)
- K C Nicolaou
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
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20
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Zeng CC, Liu FJ, Ping DW, Cai YL, Zhong RG, Becker JY. Electrochemical oxidation of catechols in the presence of 4-amino-3-methyl-5-mercapto-1,2,4-triazole bearing two nucleophilic groups. J Electroanal Chem (Lausanne) 2009. [DOI: 10.1016/j.jelechem.2008.10.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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