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Bhat BA, Rashid S, Sengupta S, Mehta G. Recent Advances in Total Synthesis of Bioactive Furo[3,2‐
b
]furanone Natural Products. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.201900714] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Bilal A. Bhat
- CSIR-Medicinal Chemistry DivisionIndian Institute of Integrative Medicine Sanatnagar-Srinagar 190005 India
- Academy of Scientific and Innovative Research India
| | - Showkat Rashid
- CSIR-Medicinal Chemistry DivisionIndian Institute of Integrative Medicine Sanatnagar-Srinagar 190005 India
- Academy of Scientific and Innovative Research India
| | | | - Goverdhan Mehta
- School of ChemistryUniversity of Hyderabad Hyderabad 500046 India
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Parsons PJ, Jones DR, Walsh LJ, Allen LAT, Onwubiko A, Preece L, Board J, White AJP. An Approach to the Core of Lactonamycin. Org Lett 2017; 19:2533-2535. [PMID: 28445072 DOI: 10.1021/acs.orglett.7b00902] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A cascade reaction has been developed for the synthesis of lactonamycin. In this paper, we demonstrate that a transition-metal-free thermal ene-diyne cyclization can be used for the construction of the entire core of the antibiotic lactonamycin and anticancer agent lactonamycin Z.
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Affiliation(s)
- Philip J Parsons
- Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, U.K
| | - Daniel R Jones
- Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, U.K
| | - Lee J Walsh
- Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, U.K
| | - Lewis A T Allen
- Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, U.K
| | - Ada Onwubiko
- Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, U.K
| | - Lewis Preece
- Department of Chemistry, University of Sussex , Falmer, Brighton BN1 9RH, U.K
| | - Johnathan Board
- Department of Chemistry, University of Sussex , Falmer, Brighton BN1 9RH, U.K
| | - Andrew J P White
- Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, U.K
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Ali S, Gao J, Begum F, Rasool A, Ismail M, Cai Y, Ali S, Ali S. Health assessment using aqua-quality indicators of alpine streams (Khunjerab National Park), Gilgit, Pakistan. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:4685-4698. [PMID: 27975201 DOI: 10.1007/s11356-016-8186-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 11/29/2016] [Indexed: 06/06/2023]
Abstract
This preliminary research was conducted to evaluate the alpine stream health by using water quality as an indicator in Khunjerab National park of the Karakoram ranges located in Pak-China boarder Pakistan having altitude of 3660 m. This study investigated the stream health in the context of the presence or absence of sensitive species, their diversity, and their taxa richness. The water and macroinvertebrate samples were collected from 17 different locations from upstream and downstream of the river by using random sampling method. Macroinvertebrate samples were obtained using kick net (500-μm mesh size) and hand-picking method (NYSDEC). A total of 710 counts including 41 families of macroinvertebrates were recorded comprising of 7 orders including: Ephemeroptera (46%) being the most dominant group, Plecoptera (33%), Trichoptera (5%), Chironomidae (Diptera) (14%), Heteroptera (1%), and Coleoptera (1%). Ephemeroptera, Trichoptera, and Plecoptera (EPT) were found in abundance at the main source, Qarchanai, Dhee, and Tourqeen Nullah, as compared to the other locations of the stream. The most dominant macroinvertebrate was Ephemeroptera whose relative abundance is Pi = 0.49 by using the Shannon index. However, different statistical tools, including principal component analysis (PCA), cluster analysis (CA), ANOVA, and linear regression model, show a strong correlation between water quality and macroinvertebrates. The overall results of the biological indicators showed better ecological health at downstream compared to upstream. This study will provide basic information and understanding about the macroinvertebrates for future researchers, and the data will be helpful for upcoming research programs on alpine streams for the discovery and occurrences of macroinvertebrates and associated fauna.
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Affiliation(s)
- Salar Ali
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing, 210008, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Junfeng Gao
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing, 210008, China.
| | - Farida Begum
- Department of Environmental Sciences, Karakoram International University, Gilgit, 15100, Pakistan
| | - Atta Rasool
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China
| | - Muhammad Ismail
- International Centre for Integrated Mountain Development, GPO Box 3226, Kathmandu, Nepal
| | - Yongjiu Cai
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing, 210008, China
| | - Shaukat Ali
- Department of Environmental Sciences, Karakoram International University, Gilgit, 15100, Pakistan
| | - Shujaat Ali
- Department of Biological Sciences, Karakoram International University, Gilgit, 15100, Pakistan
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Trost BM, Debien L. Re-Orienting Coupling of Organocuprates with Propargyl Electrophiles from S N2' to S N2 with Stereocontrol. Chem Sci 2016; 7:4985-4989. [PMID: 28066535 PMCID: PMC5207346 DOI: 10.1039/c6sc01086e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Diorganocuprate(I) reagents derived from lithiated heterocycles and CuCN react with enantioenriched secondary propagryl bromides to give the corresponding propargylated heterocycles. While propargyl electrophiles typically undergo SN2' displacement, this transformation represents the first example of the reaction of hard carbanions with propargyl eletrophiles in an SN2 fashion and occurs with excellent levels of stereoinversion. The new method was applied to the formal synthesis of (+)-frondosin B.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry Stanford University, Stanford, California 94305-5080, United States
| | - Laurent Debien
- Department of Chemistry Stanford University, Stanford, California 94305-5080, United States
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Parsons PJ, Jones DR, Padgham AC, Allen LAT, Penkett CS, Green RA, White AJP. A New Approach for the Synthesis of Highly Substituted Aromatic Rings: The Alkyne-Mediated Approach. Chemistry 2016; 22:3981-4. [DOI: 10.1002/chem.201504421] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Philip J. Parsons
- Department of Chemistry; Imperial College London; South Kensington London SW7 2AZ UK
| | - Daniel R. Jones
- Department of Chemistry; Imperial College London; South Kensington London SW7 2AZ UK
| | - Alex C. Padgham
- Department of Chemistry; Imperial College London; South Kensington London SW7 2AZ UK
| | - Lewis A. T. Allen
- Department of Chemistry; Imperial College London; South Kensington London SW7 2AZ UK
| | - Clive S. Penkett
- Department of Chemistry; Imperial College London; South Kensington London SW7 2AZ UK
| | - Robert A. Green
- School of Chemistry; University of Southampton; Southampton SO17 1BJ UK
| | - Andrew J. P. White
- Department of Chemistry; Imperial College London; South Kensington London SW7 2AZ UK
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Adachi S, Watanabe K, Iwata Y, Kameda S, Miyaoka Y, Onozuka M, Mitsui R, Saikawa Y, Nakata M. Total Syntheses of Lactonamycin and Lactonamycin Z with Late-Stage A-Ring Formation and Glycosylation. Angew Chem Int Ed Engl 2013; 52:2087-91. [DOI: 10.1002/anie.201209205] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Indexed: 11/07/2022]
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Adachi S, Watanabe K, Iwata Y, Kameda S, Miyaoka Y, Onozuka M, Mitsui R, Saikawa Y, Nakata M. Total Syntheses of Lactonamycin and Lactonamycin Z with Late-Stage A-Ring Formation and Glycosylation. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209205] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Dubois S, Rodier F, Blanc R, Rahmani R, Héran V, Thibonnet J, Commeiras L, Parrain JL. Dramatic influence of the substitution of alkylidene-5H-furan-2-ones in Diels–Alder cycloadditions with o-quinonedimethide as diene partner: en route to the CDEF polycyclic ring system of lactonamycin. Org Biomol Chem 2012; 10:4712-9. [DOI: 10.1039/c2ob25299f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Jacques SA, Michaelis S, Gebhardt B, Blum A, Lebrasseur N, Larrosa I, White AJP, Barrett AGM. Studies on the Total Synthesis of Lactonamycin: Synthesis of the Fused Pentacyclic B-F Ring Unit. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101317] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Jacques SA, Patel BH, Barrett AG. Biomimetic synthetic studies on lactonamycin: an expedient synthesis of dihydroxy-isoindolinone-carboxylates. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.08.173] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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