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Chand S, Sharma AK, Pandey AK, Singh KN. Synthesis of unsymmetrical ketones via dual catalysed cross-coupling of α,β-unsaturated carboxylic acids with aryldiazonium salts. Chem Commun (Camb) 2023. [PMID: 38013486 DOI: 10.1039/d3cc04898e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
A visible light-enabled synthesis of unsymmetrical ketones has been accomplished by the cross-coupling of α,β-unsaturated carboxylic acids and aryldiazonium salts embracing a synergistic eosin Y and Co(OAc)2·4H2O catalysis. The reaction involves decarboxylative aerobic CC bond cleavage, and is endowed with the creation of new C-C and C-O bonds with good substrate scope.
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Affiliation(s)
- Shiv Chand
- Department of Chemistry Institute of Science Banaras Hindu University, Varanasi 221005, India.
| | - Anup Kumar Sharma
- Department of Chemistry Institute of Science Banaras Hindu University, Varanasi 221005, India.
| | - Anand Kumar Pandey
- Department of Chemistry Institute of Science Banaras Hindu University, Varanasi 221005, India.
| | - Krishna Nand Singh
- Department of Chemistry Institute of Science Banaras Hindu University, Varanasi 221005, India.
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Venigalla M, Roberts TL, Raju R, Mrad M, Bodkin F, Kopp K, Doyle K, Münch G. Identification of tetragocarbone C and sideroxylin as the most potent anti-inflammatory components of Syncarpia glomulifera. Fitoterapia 2021; 150:104843. [PMID: 33539940 DOI: 10.1016/j.fitote.2021.104843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 01/26/2021] [Accepted: 01/28/2021] [Indexed: 11/25/2022]
Abstract
In contrast to ancient Western and Asian cultures, medicinal plants of the Aboriginal and Torres Strait Islanders in Australia have not been as intensively studied for their molecular composition and molecular bioactivity. Syncarpia glomulifera subsp. glomulifera is a species in the plant family Myrtaceae. The resin of the plant has been traditionally used by the D'harawal people of Western Sydney to heal inflamed sores and ulcers. Hence, the anti-inflammatory activity of its leaf extract was investigated in RAW 264.7 macrophage and N11 microglia cell lines to isolate and identify the most active compounds. One new compound, tetragocarbone C, and three known compounds, tetragocarbone B, sideroxylin, and lumaflavanone A showed potent anti-inflammatory activity by downregulating nitric oxide and TNF-α production in LPS and IFN-γ stimulated cells. Except for the less potent tetragocarbone B, all compounds had an IC50 value (for nitric oxide downregulation) of <10 μg/mL and moderate cytotoxicity in both cell lines. The molecular targets along pro-inflammatory signaling pathways were further investigated in RAW 264.7 cells. All four compounds suppressed phosphorylation of ERK, c-Jun, and limited the phosphorylation of STAT-1 and STAT-3 in response to LPS and IFN-γ activation. The four compounds also suppressed NF-κB activation by preventing the translocation of the p65 subunit into the nucleus. Collectively, these findings suggest that the compounds isolated from Syncarpia glomulifera, especially tetragocarbone C and sideroxylin are promising anti-inflammatory agents, and could be further investigated for the treatment of diseases characterized by chronic inflammation.
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Affiliation(s)
- Madhuri Venigalla
- Pharmacology Unit, School of Medicine, Western Sydney University, Building 30, Campbelltown, NSW, Australia
| | - Tara Laurine Roberts
- School of Medicine, Ingham Institute for Applied Medical Research, Western Sydney University, Liverpool, NSW, Australia
| | - Ritesh Raju
- Pharmacology Unit, School of Medicine, Western Sydney University, Building 30, Campbelltown, NSW, Australia
| | - Melissa Mrad
- Pharmacology Unit, School of Medicine, Western Sydney University, Building 30, Campbelltown, NSW, Australia
| | - Frances Bodkin
- NICM Health Research Institute, Western Sydney University, Sydney, NSW, Australia
| | - Katja Kopp
- Pharmacology Unit, School of Medicine, Western Sydney University, Building 30, Campbelltown, NSW, Australia
| | - Kerrie Doyle
- Indigenous Health Unit, School of Medicine, Western Sydney University, Building 30, Campbelltown, NSW, Australia
| | - Gerald Münch
- Pharmacology Unit, School of Medicine, Western Sydney University, Building 30, Campbelltown, NSW, Australia; NICM Health Research Institute, Western Sydney University, Sydney, NSW, Australia.
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Chen L, Zhang L, Yan G, Huang D. Recent Advances of Cinnamic Acids in Organic Synthesis. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000217] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Lihua Chen
- Department of ChemistryLishui University No. 1, Xueyuan Road Lishui City 323000 Zhejiang Province P. R. China
| | - Ling Zhang
- Department of ChemistryLishui University No. 1, Xueyuan Road Lishui City 323000 Zhejiang Province P. R. China
| | - Guobing Yan
- Department of ChemistryLishui University No. 1, Xueyuan Road Lishui City 323000 Zhejiang Province P. R. China
| | - Dayun Huang
- Department of ChemistryLishui University No. 1, Xueyuan Road Lishui City 323000 Zhejiang Province P. R. China
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Park S, Cho J, Jeon H, Sung SH, Lee S, Kim S. Expedient Synthesis of Alphitolic Acid and Its Naturally Occurring 2- O-Ester Derivatives. JOURNAL OF NATURAL PRODUCTS 2019; 82:895-902. [PMID: 30768265 DOI: 10.1021/acs.jnatprod.8b00986] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The expedient synthesis of alphitolic acid (1) as well as its natural C-3-epimer and 2- O-ester derivatives was accomplished in a few steps from the readily commercially available betulin (9). A Rubottom oxidation delivered an α-hydroxy group in a stereo- and chemoselective manner. The diastereoselective reduction of the α-hydroxy ketone was key to accessing the 1,2-diol moiety of this class of natural products. Our concise and stereoselective synthetic protocol allowed the gram-scale synthesis of these natural products, which will facilitate future biological evaluations.
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Affiliation(s)
- Somin Park
- College of Pharmacy , Seoul National University , 1 Gwanak-ro , Gwanak-gu , Seoul 08826 , Republic of Korea
| | - Jihee Cho
- College of Pharmacy , Seoul National University , 1 Gwanak-ro , Gwanak-gu , Seoul 08826 , Republic of Korea
| | - Hongjun Jeon
- College of Pharmacy , Seoul National University , 1 Gwanak-ro , Gwanak-gu , Seoul 08826 , Republic of Korea
| | - Sang Hyun Sung
- College of Pharmacy , Seoul National University , 1 Gwanak-ro , Gwanak-gu , Seoul 08826 , Republic of Korea
| | - Seunghee Lee
- College of Pharmacy , Seoul National University , 1 Gwanak-ro , Gwanak-gu , Seoul 08826 , Republic of Korea
| | - Sanghee Kim
- College of Pharmacy , Seoul National University , 1 Gwanak-ro , Gwanak-gu , Seoul 08826 , Republic of Korea
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