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Xiao T, Cheng X, Huang J, Guo Z, Tao L, Shen X. Bioactive substances inhibiting COX-2 and cancer cells isolated from the fibrous roots of Alangium chinense (Lour.) Harms. RSC Adv 2023; 13:3346-3363. [PMID: 36756416 PMCID: PMC9891086 DOI: 10.1039/d2ra06931h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 01/05/2023] [Indexed: 01/28/2023] Open
Abstract
Alangium chinense has been used as a traditional folk medicine for centuries to treat rheumatism, skin diseases, and diabetes by the people of Southeast Asia. However, the bioactive constituents inhibiting COX-2 and cancer cells (HepG2, Caco-2, HeLa) remain unclear. In this study one new (14) along with twenty-four known compounds (1-13, 15-25) were isolated from the fibrous roots of Alangium chinense by chromatographic methods, and identified by NMR, and Gaussian and CD calculation. Compounds 1, 2, 13, 16, 17, 19, 20, 23, and 24 were isolated from this plant for the first time. Their inhibition effects on COX-2 enzyme and cancer cells were evaluated by MTT assay. Compounds 1-4, 13-14, and 16-18 can be used as good inhibitors against COX-2 enzyme, and compounds 1, 13, 14, and 17 were stronger than the positive control (celecoxib). In addition, molecular docking suggested that compounds 13, 17, and 18 belong to ellagic acids and have good inhibition against COX-2 enzyme. While compounds 1, 5, 13 and 21 showed cytotoxicity against HepG2 cells, compounds 2 and 21 showed cytotoxicity against Caco-2 cells, and compound 20 showed cytotoxicity against HeLa cells.
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Affiliation(s)
- Ting Xiao
- The State Key Laboratory of Functions and Applications of Medicinal Plants the Department of Pharmaceutic Preparation of Chinse Medicine, The High Educational Key Laboratory of Guizhou Province for Natural Medicinal Pharmacology and Druggability, School of Pharmaceutical Sciences, Guizhou Medical University Guiyang 550025 China .,The Key Laboratory of Optimal Utilization of Natural Medicine Resources, School of Pharmaceutical Sciences, Guizhou Medical University, University Town Guian New District Guizhou China +86-851-88416149 +86-851-88416149
| | - Xingyan Cheng
- The State Key Laboratory of Functions and Applications of Medicinal Plants the Department of Pharmaceutic Preparation of Chinse Medicine, The High Educational Key Laboratory of Guizhou Province for Natural Medicinal Pharmacology and Druggability, School of Pharmaceutical Sciences, Guizhou Medical University Guiyang 550025 China .,The Key Laboratory of Optimal Utilization of Natural Medicine Resources, School of Pharmaceutical Sciences, Guizhou Medical University, University Town Guian New District Guizhou China +86-851-88416149 +86-851-88416149
| | - Jiaoyan Huang
- The State Key Laboratory of Functions and Applications of Medicinal Plants the Department of Pharmaceutic Preparation of Chinse Medicine, The High Educational Key Laboratory of Guizhou Province for Natural Medicinal Pharmacology and Druggability, School of Pharmaceutical Sciences, Guizhou Medical University Guiyang 550025 China .,The Key Laboratory of Optimal Utilization of Natural Medicine Resources, School of Pharmaceutical Sciences, Guizhou Medical University, University Town Guian New District Guizhou China +86-851-88416149 +86-851-88416149
| | - Zhenghong Guo
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, University Town Guian New District Guiyang 550025 China +86-851-88308060 +86-851-88308060
| | - Ling Tao
- The State Key Laboratory of Functions and Applications of Medicinal Plants the Department of Pharmaceutic Preparation of Chinse Medicine, The High Educational Key Laboratory of Guizhou Province for Natural Medicinal Pharmacology and Druggability, School of Pharmaceutical Sciences, Guizhou Medical University Guiyang 550025 China .,The Key Laboratory of Optimal Utilization of Natural Medicine Resources, School of Pharmaceutical Sciences, Guizhou Medical University, University Town Guian New District Guizhou China +86-851-88416149 +86-851-88416149
| | - Xiangchun Shen
- The State Key Laboratory of Functions and Applications of Medicinal Plants the Department of Pharmaceutic Preparation of Chinse Medicine, The High Educational Key Laboratory of Guizhou Province for Natural Medicinal Pharmacology and Druggability, School of Pharmaceutical Sciences, Guizhou Medical University Guiyang 550025 China .,The Key Laboratory of Optimal Utilization of Natural Medicine Resources, School of Pharmaceutical Sciences, Guizhou Medical University, University Town Guian New District Guizhou China +86-851-88416149 +86-851-88416149
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Rao BV, Surender B, Vinaykumar A, Bharathkumar H. Concise Synthesis of (1R,2S,3R,6R)-6-Ethoxy-4-(hydroxymethyl)cyclohex-4-ene-1,2,3-triol, a Key Intermediate for the Synthesis of Uvacalols I and J. Synlett 2022. [DOI: 10.1055/s-0041-1737965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractUvacalols are novel carbasugars isolated from the genera Uvaria. In this study, we report concise syntheses of (1R,2S,3R,6R)-6-ethoxy-4-(hydroxymethyl)cyclohex-4-ene-1,2,3-triol, a key intermediate for the synthesis of uvacalols I and J, and of its epimer (1R,2S,3S,6R)-6-ethoxy-4-(hydroxymethyl)cyclohex-4-ene-1,2,3-triol, starting from cheap and readily available methyl d-glucopyranoside.
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Takagi A, Usuguchi K, Takashima I, Okuda K. Total Synthesis of Antiausterity Agent (±)-Uvaridacol L by Regioselective Axial Diacylation of a myo-Inositol Orthoester. Org Lett 2021; 23:4083-4087. [PMID: 33596082 DOI: 10.1021/acs.orglett.1c00079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The antiausterity natural product (±)-uvaridacol L was synthesized for the first time in seven steps from myo-inositol. The key reaction of this synthesis, axial selective dibenzoylation of myo-inositol orthoformate, was achieved using a catalytic amount of tetrabutylammonium fluoride (TBAF). The preferential cytotoxicity of racemic uvaridacol L against cancer cell lines able to adapt to nutrient deprivation was also evaluated under nutrient deprived conditions. Morphological evaluation was also carried out.
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Affiliation(s)
- Akira Takagi
- Laboratory of Bioorganic & Natural Products Chemistry, Kobe Pharmaceutical University, 4-19-1 Motoyamakita, Higashinada, Kobe, Hyogo 658-8558, Japan
| | - Kazuki Usuguchi
- Laboratory of Bioorganic & Natural Products Chemistry, Kobe Pharmaceutical University, 4-19-1 Motoyamakita, Higashinada, Kobe, Hyogo 658-8558, Japan
| | - Ippei Takashima
- Laboratory of Bioorganic & Natural Products Chemistry, Kobe Pharmaceutical University, 4-19-1 Motoyamakita, Higashinada, Kobe, Hyogo 658-8558, Japan
| | - Kensuke Okuda
- Laboratory of Bioorganic & Natural Products Chemistry, Kobe Pharmaceutical University, 4-19-1 Motoyamakita, Higashinada, Kobe, Hyogo 658-8558, Japan
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Athiyarath V, Roy NJ, Vijil ATV, Sureshan KM. Synthesis of novel seven-membered carbasugars and evaluation of their glycosidase inhibition potentials. RSC Adv 2021; 11:9410-9420. [PMID: 35423467 PMCID: PMC8698521 DOI: 10.1039/d1ra00804h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 02/23/2021] [Indexed: 12/15/2022] Open
Abstract
Here, we report the synthesis of five novel seven-membered carbasugar analogs. We adopted a chiral-pool strategy starting from the cheap and readily available d-mannitol to synthesize these ring-expanded carbasugars. Apart from several regioselective protecting group manipulations, these syntheses involved Wittig olefination and ring-closing metathesis as the key steps. We observed an unprecedented deoxygenation reaction of an allylic benzyl ether upon treatment with H2/Pd during the synthesis. Preliminary biological evaluation of the carbasugars revealed that these ring expanded carbasugars act as inhibitors of various glycosidases. This study highlights the importance of the synthesis of novel ring expanded carbasugars and their biological exploration. Here, we report the synthesis of five novel seven-membered carbasugar analogs.![]()
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Affiliation(s)
- Vignesh Athiyarath
- School of Chemistry
- Indian Institute of Science Education and Research Thiruvananthapuram
- India
| | - Naveen J. Roy
- School of Chemistry
- Indian Institute of Science Education and Research Thiruvananthapuram
- India
| | - A. T. V. Vijil
- School of Chemistry
- Indian Institute of Science Education and Research Thiruvananthapuram
- India
| | - Kana M. Sureshan
- School of Chemistry
- Indian Institute of Science Education and Research Thiruvananthapuram
- India
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Mondal S, Sureshan KM. Carbasugar Synthesis via Vinylogous Ketal: Total Syntheses of (+)-MK7607, (-)-MK7607, (-)-Gabosine A, (-)-Epoxydine B, (-)-Epoxydine C, epi-(+)-Gabosine E and epi-(+)-MK7607. J Org Chem 2016; 81:11635-11645. [PMID: 27808513 DOI: 10.1021/acs.joc.6b01876] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Carbasugars, the carbocyclic analogues of sugars, constitute an important class of natural products with more than 140 members known and have attracted much attention due to their diverse biological activities like anticancer, antibacterial, herbicidal, and various enzyme inhibitory activities. As many carbohydrates are involved in various cellular signaling pathways, there is great interest in synthesis and biological exploration of carbasugars. Herein, we have developed a methodology to install an α,β-unsaturated aldehyde functionality on different inositols and derivatives by vinylogous elimination of the O-protecting group under mildly acidic condition. We have illustrated the versatility and utility of our methodology by the total syntheses of seven carbasugars viz. (-)-MK7607, (-)-gabosine A, (-)-epoxydine B, (-)-epoxydine C, (+)-MK7607, 1-epi-(+)-MK7607 and 1-epi-(+)-gabosine E.
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Affiliation(s)
- Soumik Mondal
- Indian Institute of Science Education and Research , Thiruvananthapuram, Kerala 695016, India
| | - Kana M Sureshan
- Indian Institute of Science Education and Research , Thiruvananthapuram, Kerala 695016, India
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Gattu R, Basha RS, Bagdi PR, Khan AT. One-pot three-component regioselective synthesis of C1-functionalised 3-arylbenzo[f]quinoline. RSC Adv 2016. [DOI: 10.1039/c5ra23413a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An efficient method for regioselective synthesis of C1-functionalised 3-arylbenzo[f]quinoline has been demonstrated using β-ketoester, 2-naphthylamine and aromatic aldehyde by employing camphorsulfonic acid as the catalyst in acetonitrile at 70 °C.
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Affiliation(s)
- Radhakrishna Gattu
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039
- India
| | - R. Sidick Basha
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039
- India
| | - Prasanta Ray Bagdi
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039
- India
| | - Abu T. Khan
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039
- India
- Vice-Chancellor
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Vidyasagar A, Sureshan KM. Total syntheses of five uvacalols: structural validation of uvacalol A, uvacalol B and uvacalol C and disproval of the structures of uvacalol E and uvacalol G. Org Biomol Chem 2015; 13:3900-10. [PMID: 25655990 DOI: 10.1039/c4ob02663b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Uvacalols are novel carbasugars belonging to the family of C7-cyclitols, and are isolated from the roots of the medicinal plant, Uvaria calamistrata. In this study, we report the first syntheses of five uvacalols starting from a cheap and easily available chiral pool starting material, D-mannitol, in their optically pure form. D-Mannitol was converted to the alkene 2 through a series of regioselective and chemoselective transformations by following our previously reported strategies. Alkene 2 was converted to the enal 5 through a series of protective group manipulations. Enal 5 was converted to the diene 6 by the addition of vinyl magnesium bromide. Ring closing metathesis of the diene 6 using Grubbs’ second generation catalyst installed the core cyclohexenyl unit. Through several iterative and selective manipulations of various hydroxyl groups, uvacalol A, uvacalol B, uvacalol C, uvacalol E and uvacalol G were synthesized. A comparison of the (1)H NMR and (13)C NMR data of these synthesized molecules with the reported data, revealed that the reported structures of uvacalols A–C are correct and those of uvacalols E and G are wrong.
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Affiliation(s)
- Adiyala Vidyasagar
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram 695016, India.
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