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Rana R, Pundir S, Lal UR, Chauhan R, Upadhyay SK, Kumar D. Phytochemistry and biological activity of Erigeron annuus (L.) Pers. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2023; 396:2331-2346. [PMID: 37178275 DOI: 10.1007/s00210-023-02518-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 04/29/2023] [Indexed: 05/15/2023]
Abstract
Erigeron annuus L. is a flowering herb of North America, Europe, Asia and Russia. This plant is used as folk medicine in China for the cure of indigestion, enteritis, epidemic hepatitis, haematuria and diabetes. Phytochemical studies showed the presence of 170 bioactive compounds like coumarins, flavonoids, terpenoids, polyacetylenic compounds; γ-pyrone derivatives, sterols and various caffeoylquinic acids derived from the essential oil and organic extracts from its various parts such as aerial parts, roots, leaves, stems and flowers. The pharmacological studies demonstrated various extracts and the compounds of E. annuus to exhibit anti-fungal, anti-atherosclerosis, anti-inflammatory, antidiabetic, phytotoxic, cytoprotective, antiobesity and antioxidant activities. This article covers a critical compendious on geographical distribution, botanical description, phytochemistry, ethnomedicinal uses and pharmacological activities of E. annuus. However, further in-depth studies are needed to determine the medical uses of E. annuus and its chemical constituents, pharmacological activities and clinical applications.
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Affiliation(s)
- Rupali Rana
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, 143005, India
| | - Swati Pundir
- School of Pharmaceutical Sciences, Shoolini University, Himachal Pradesh, Solan, 173229, India.
| | - Uma Ranjan Lal
- School of Pharmaceutical Sciences, Shoolini University, Himachal Pradesh, Solan, 173229, India
- Department of Natural Products, National Institute of Pharmaceutical Education and Research, Punjab, 160062, Mohali, India
| | - Raveen Chauhan
- School of Pharmaceutical Sciences, Shoolini University, Himachal Pradesh, Solan, 173229, India
| | | | - Deepak Kumar
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Sciences, Shoolini University, Himachal Pradesh, Solan, 173229, India.
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Utilization of the inherent nucleophile for regioselective O-acylation of polyphenols via an intermolecular cooperative transesterification. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.05.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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3
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Kumar A, Khan A, Malhotra S, Mosurkal R, Dhawan A, Pandey MK, Singh BK, Kumar R, Prasad AK, Sharma SK, Samuelson LA, Cholli AL, Len C, Richards NGJ, Kumar J, Haag R, Watterson AC, Parmar VS. Synthesis of macromolecular systems via lipase catalyzed biocatalytic reactions: applications and future perspectives. Chem Soc Rev 2016; 45:6855-6887. [DOI: 10.1039/c6cs00147e] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
This review highlights the application of lipases in the synthesis of pharmaceutically important small molecules and polymers for diverse applications.
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Miyazawa T, Hamada M, Morimoto R. Candida antarctica lipase B-catalyzed regioselective deacylation of dihydroxybenzenes acylated at both phenolic hydroxy groups. CAN J CHEM 2016. [DOI: 10.1139/cjc-2015-0335] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Candida antarctica lipase B proved to be highly active in the deacylation of substituted hydroquinones and resorcinols acylated at both phenolic hydroxy groups. The deacylation reactions were much faster than the corresponding direct acylations of these dihydroxybenzenes catalyzed by the same lipase. More importantly, they took place generally in a markedly regioselective manner: the acyloxy group remote from the substituent was preferentially cleaved. The main or exclusive products obtained were the regioisomers of those produced through the direct acylation of the dihydroxybenzenes. In the case of alkyl-substituted hydroquinone derivatives, the regioselectivity increased with an increase in the bulk of the substituent. In the case of 4-substituted diacylated resorcinols, the 3-O-monoacyl derivatives were obtained generally as the sole products. Quite interestingly, some secondary alcohols proved to act as better acyl acceptors than the corresponding primary alcohols in these enzymatic deacylations.
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Affiliation(s)
- Toshifumi Miyazawa
- Department of Chemistry, Faculty of Science and Engineering, Konan University, Higashinada-ku, Kobe 658-8501, Japan
- Department of Chemistry, Faculty of Science and Engineering, Konan University, Higashinada-ku, Kobe 658-8501, Japan
| | - Manabu Hamada
- Department of Chemistry, Faculty of Science and Engineering, Konan University, Higashinada-ku, Kobe 658-8501, Japan
- Department of Chemistry, Faculty of Science and Engineering, Konan University, Higashinada-ku, Kobe 658-8501, Japan
| | - Ryohei Morimoto
- Department of Chemistry, Faculty of Science and Engineering, Konan University, Higashinada-ku, Kobe 658-8501, Japan
- Department of Chemistry, Faculty of Science and Engineering, Konan University, Higashinada-ku, Kobe 658-8501, Japan
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Candida antarctica lipase B-mediated regioselective acylation of dihydroxybenzenes in organic solvents. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.04.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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6
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Structural elucidation and bioactivity of biflavonoids from the stems of Wikstroemia taiwanensis. Int J Mol Sci 2012; 13:1029-1038. [PMID: 22312302 PMCID: PMC3269736 DOI: 10.3390/ijms13011029] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 01/01/2012] [Accepted: 01/10/2012] [Indexed: 12/01/2022] Open
Abstract
Three new biflavonoids, wikstaiwanones A–C (1–3), along with four known compounds (4–7) were isolated from the stems of Wikstroemia taiwanensis (Thymelaeaceae). Their structures were elucidated by spectroscopic analysis. Compounds 4 and 5 showed antitubercular activity against Mycobacterium tuberculosis with MIC values of 15 μg/mL, respectively.
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Faizi S, Dar A, Siddiqi H, Naqvi S, Naz A, Bano S. Bioassay-guided isolation of antioxidant agents with analgesic properties from flowers of Tagetes patula. PHARMACEUTICAL BIOLOGY 2011; 49:516-25. [PMID: 21284510 DOI: 10.3109/13880209.2010.523006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
CONTEXT Tagetes patula L. is one of the French marigold group of the Asteraceae family. It is recognized in folklore for its medicinal and pesticidal properties. OBJECTIVE In search of more effective, but non-toxic compounds with antioxidative potential led to the bioassay guided isolation studies on the extracts of T. patula. MATERIALS AND METHODS The bioassay on Tagetes patula flowers were carried out guided by in vitro antioxidant activity using DPPH assay. A minor but proven plant constituent methyl protocatechuate (1) was isolated by column chromatography, while patuletin (2) and patulitrin (3) obtained in bulk by employing solvent partition of methanol extract. Derivatization of patuletin into benzoyl, cinnamoyl and methyl was conducted to establish the structure activity relationship (SAR). Analgesic activity of compound 2 was evaluated using acetic acid-induced writhing test and hot-plate test in mice. The toxicity of methanol extract and compound 2 were also determined. RESULTS Polar extracts, fractions and phases demonstrated better antioxidant activity. The synthetic methyl protocatechuate (1) showed IC(50) value of 2.8 ± 0.2 μg/mL, whereas patuletin (2) (IC(50) = 4.3 ± 0.25 µg/mL) was comparable to quercetin and rutin but significantly better than patulitrin (3) (IC(50) = 10.17 ± 1.16 µg/mL). Toxicity test for the methanol extract and compound 2 did not elicit any behavioral changes or cause mortality in mice. Compound 2 also demonstrated mild analgesic property. DISCUSSION AND CONCLUSION These findings demonstrate that the plant polar extracts and fractions possess significant antioxidant property with non-toxic effect. Compound 1 is a genuine plant constituent of T. patula.
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Affiliation(s)
- Shaheen Faizi
- International Center for Chemical and Biological Sciences, H E J Research Institute of Chemistry, University of Karachi, Karachi, Pakistan.
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Husain M, Kumar V, Kumar R, Shakil NA, Sharma SK, Prasad AK, Olsen CE, Gupta RK, Malhotra SV, Van Der Eycken E, Depass AL, Levon K, Parmar VS. Enantioselective biocatalytic reactions on (±)-aryl alkyl ketones with native and modified porcine pancreatic lipase. BIOCATAL BIOTRANSFOR 2010. [DOI: 10.3109/10242421003734704] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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9
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Chen J, Huang PQ, Queneau Y. Enantioselective synthesis of the R-enantiomer of the feeding deterrent (S)-ypaoamide. J Org Chem 2009; 74:7457-63. [PMID: 19746925 DOI: 10.1021/jo901557h] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The enantioselective synthesis of the R-enantiomer of the marine natural product (S)-ypaoamide (5) is reported. The synthesis features both a flexible racemization-free approach to the 5-substituted 3-pyrrolin-2-one segment, and a lipase (CCL)-promoted deacetylation reaction to reach the orthogonal deprotection. Through this work the absolute configuration of the natural ypaoamide was determined as S.
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Affiliation(s)
- Jie Chen
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
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Colombo R, de L Batista AN, Teles HL, Silva GH, Bomfim GCC, Burgos RCR, Cavalheiro AJ, da Silva Bolzani V, Silva DHS, Pelícia CR, Guimarães FM, Heimberg MCH. Validated HPLC method for the standardization of Phyllanthus niruri (herb and commercial extracts) using corilagin as a phytochemical marker. Biomed Chromatogr 2009; 23:573-80. [PMID: 19277954 DOI: 10.1002/bmc.1155] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Phyllanthus niruri L., commonly known in Brazil as 'quebra-pedra', has long been used in the treatment of diverse diseases and especially urolithiasis. The therapeutic effects of P. niruri are attributed to various compounds present in the plant, including the hydrolysable tannin corilagin. In the present study, high-performance liquid chromatography (HPLC-/PAD) profiles of leaves and commercial extracts of P. niruri were examined and three compounds, found to be present in all of the samples studied, were isolated by open column chromatography over C18)silica gel followed by preparative HPLC. These compounds were identified by nuclear magnetic resonance as corilagin, rutin and ethyl 3,4,5-trihydroxybenzoate. Corilagin, which has been proposed as a phytochemical marker for P. niruri, was employed as an external standard in the development and validation of a rapid and efficient qualitative and quantitative HPLC assay for the analyte. The method may be applied in the standardization of herbs and phytomedicines commercialized in Brazil as quebra-pedra.
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Affiliation(s)
- Renata Colombo
- Instituto de Química, Universidade Estadual Paulista, Araraquara, SP, Brazil.
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Parmar VS, Pati HN, Yadav RP, Kumar A, Bisht KS, Gupta R, Davidson S, Poonam, Saxena RK. Utility of a Novel Lipase FromAspergillus Terreusin Deacetylation Reactions. BIOCATAL BIOTRANSFOR 2009. [DOI: 10.3109/10242429809040108] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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12
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Kazlauskas RJ, Bornscheuer UT. Biotransformations with Lipases. BIOTECHNOLOGY 2008:36-191. [PMID: 0 DOI: 10.1002/9783527620906.ch3] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
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13
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Ambika, Singh PP, Chauhan SMS. Chemoselective Esterification of Phenolic Acids in the Presence of Sodium Bicarbonate in Ionic Liquids. SYNTHETIC COMMUN 2008. [DOI: 10.1080/00397910701845480] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Ambika
- a Department of Chemistry , University of Delhi , Delhi, India
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Miyazawa T, Hamada M, Morimoto R, Murashima T, Yamada T. Highly regioselective propanoylation of dihydroxybenzenes mediated by Candida antarctica lipase B in organic solvents. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2007.10.124] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Secondary alcohols act as better nucleophiles than primary alcohols in the lipase-catalyzed regioselective deacylation of dihydroxybenzenes acylated at both phenolic hydroxyls. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.09.104] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Hsu FL, Yang LM, Chang SF, Wang LH, Hsu CY, Liu PC, Lin SJ. Biotransformation of gallic acid by Beauveria sulfurescens ATCC 7159. Appl Microbiol Biotechnol 2006; 74:659-66. [PMID: 17111140 DOI: 10.1007/s00253-006-0692-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2006] [Revised: 09/25/2006] [Accepted: 09/26/2006] [Indexed: 10/23/2022]
Abstract
Preparative-scale fermentation of gallic acid (3,4,5-trihydroxybenzoic acid) (1) with Beauveria sulfurescens ATCC 7159 gave two new glucosidated compounds, 4-(3,4-dihydroxy-6-hydroxymethyl-5-methoxy-tetrahydro-pyran-2-yloxy)-3-hydroxy-5-methoxy-benzoic acid (4), 3-hydroxy-4,5-dimethoxy-benzoic acid 3,4-dihydroxy-6-hydroxymethyl-5-methoxy-tetrahydro-pyran-2-yl ester (7), along with four known compounds, 3-O-methylgallic acid (2), 4-O-methylgallic acid (3), 3,4-O-dimethylgallic acid (5), and 3,5-O-dimethylgallic acid (6). The new metabolite genistein 7-O-beta-D-4''-O-methyl-glucopyranoside (8) was also obtained as a byproduct due to the use of soybean meal in the fermentation medium. The structural elucidation of the metabolites was based primarily on 1D-, 2D-NMR, and HRFABMS analyses. Among these compounds, 2, 3, and 5 are metabolites of gallic acid in mammals. This result demonstrated that microbial culture parallels mammalian metabolism; therefore, B. sulfurescens might be a useful tool for generating mammalian metabolites of related analogs of gallic acid (1) for complete structural identification and for further use in investigating pharmacological and toxicological properties in this series of compounds. In addition, a GRE (glucocorticoid response element)-mediated luciferase reporter gene assay was used to initially screen for the biological activity of the 6 compounds, 2-6 and 8, along with 1 and its chemical O-methylated derivatives 9-13. Among the 12 compounds tested, 11-13 were found to be significant, but less active than the reference compounds of methylprednisolone and dexamethasone.
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Affiliation(s)
- Feng-Lin Hsu
- Graduate Institute of Pharmacognosy Science, College of Pharmacy, Taipei Medical University, 250 Wu-Hsing St., Taipei, 110, Taiwan
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Subeki S, Matsuura H, Takahashi K, Yamasaki M, Yamato O, Maede Y, Katakura K, Kobayashi S, Trimurningsih T, Chairul C, Yoshihara T. Anti-babesial and anti-plasmodial compounds from Phyllanthus niruri. JOURNAL OF NATURAL PRODUCTS 2005; 68:537-539. [PMID: 15844943 DOI: 10.1021/np0497245] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Bioassay-guided fractionation of boiled aqueous extracts from the whole plant of Phyllanthus niruri led to the isolation of 1-O-galloyl-6-O-luteoyl-alpha-d-glucose (1), with IC(50) values of 4.7 microg/mL against Babesia gibsoni and 1.4 microg/mL against Plasmodium falciparum in vitro. The known compounds beta-glucogallin (2), quercetin 3-O-beta-d-glucopyranosyl-(2-->1)-O-beta-d-xylopyranoside (3), beta-sitosterol, and gallic acid were also isolated. Structures of these compounds were elucidated on the basis of their chemical and spectroscopic data.
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Affiliation(s)
- Subeki Subeki
- Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
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Singh I, Prasad AK, Sharma AK, Saxena RK, Olsen CE, Cholli AL, Samuelson LA, Kumar J, Watterson AC, Parmar VS. Synthetic and novel biocatalytic resolution studies on (+/-)-5/6/7-acetoxy-4-aryl-3,4-dihydrocoumarins. Bioorg Med Chem 2003; 11:529-38. [PMID: 12538018 DOI: 10.1016/s0968-0896(02)00454-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Eleven (+/-)-5/6/7-acetoxy-4-aryl-3,4-dihydrocoumarins have been synthesised in two steps starting from the coupling of cinnamic acid/substituted cinnamic acid with appropriate phenols, followed by acetylation in 50-83% overall yields. All hydroxy- and acetoxycoumarins were unambiguously identified on the basis of their spectral data. Candida antarctica lipase-catalysed deacetylation of these racemic acetoxydihydrocoumarins in dioxane occurred with moderate enantioselectivity. This is one of the rare examples of resolution using phenolic ester moiety as a remote handle for chiral recognition by a lipase.
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Affiliation(s)
- Ishwar Singh
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, -110 007, Delhi, India
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Highly efficient diastereoselective biocatalytic acylation of a diastereotopic furanose diol and synthesis of key intermediates for amino derivatized bicyclonucleosides. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(02)01632-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Di Bari L, Mannucci S, Pescitelli G, Salvadori P. Assignment of absolute configuration of chiral carboxylic acids via exciton-coupled CD treatment: 4-phenylthioproline as a case study. Chirality 2002; 14:611-7. [PMID: 12125029 DOI: 10.1002/chir.10086] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The 4-hydroxybenzoate chromophore was used as an exciton reporter group for the assignment of the absolute configuration of a chiral carboxylic acid of pharmaceutical interest, (-)-(2S,4S)-4-phenylthioproline, precursor of the ACE-inhibitor zofenopril. The nondegenerate coupling with the preexisting phenylthio chromophore was observed. A detailed conformational analysis, accomplished by means of (1)H-NMR NOESY and semiempirical PM3 computational methods, and quantitative CD calculations were necessary to substantiate the assignment based on a weak experimental couplet.
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Affiliation(s)
- Lorenzo Di Bari
- Centro di Studio del CNR per le Macromolecole Stereordinate e Otticamente Attive, Dipartimento di Chimica e Chimica Industriale, Pisa, Italy
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Moon HS, Nam SI, Kim SD, Kim D, Gwag BJ, Lee YA, Yoon SH. Structural requirements for the neuroprotective effects of aspirin analogues against N-methyl-D-aspartate and zinc ion neurotoxicity. J Pharm Pharmacol 2002; 54:935-44. [PMID: 12162712 DOI: 10.1211/002235702760089054] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
In order to elucidate the structural requirements for the dual neuroprotective activity of aspirin against N-methyl-D-aspartate (NMDA) and zinc ion neurotoxicity, various aspirin analogues and derivatives, modified at the carboxylic group, the acetyl group, and the chain length between the carboxylic acid moiety and phenyl ring, were synthesized. Replacement of the carboxylic acid group with alkyl groups (compounds 2c and 2d) resulted in a dramatic increase in neuroprotective activity against NMDA neurotoxicity, while reduction of the carboxylic acid group to the alcohol (compound 2g) completely abolished this activity. In contrast to NMDA neurotoxicity, compounds that are devoid of the carboxylic acid group did not show any activity against zinc ion neurotoxicity. Replacement of the acetyl group with a propionyl (compound 5a) or butyryl group (compound 5b) did not significantly change the activity against NMDA neurotoxicity, but replacement of the acetyl group with a propionyl group (compound 5a) resulted in a slight decrease in activity against zinc ion neurotoxicity. Compound 12, which has ethylene units between the carboxylic acid moiety and phenyl ring in the structure of aspirin, exhibited greater neuroprotective activity against NMDA neurotoxicity than the compared compounds (aspirin, compound 9 and compound 17), which have different chain lengths. A similar trend was also observed in the neuroprotective activity against zinc ion neurotoxicity. These results indicate that the carboxylic acid group in aspirin is not indispensable for the inhibitory effect against NMDA neurotoxicity, but is essential for the inhibitory effect against zinc ion neurotoxicity. The acetyl group and ethylene unit's distance are favourable for the inhibitory effect against NMDA neurotoxicity as well as zinc ion neurotoxicity.
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Affiliation(s)
- Ho-Sang Moon
- Department of Molecular Science and Technology, Ajou University, Suwon, South Korea
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Mukherjee S, Prasad AK, Parmar VS, Howarth OW. Novel lipase-catalysed enantioselective deacetylation of (+/-)-5-acetoxy-3-(4-fluorophenyl)-2-phenylisoxazolidine. Bioorg Med Chem Lett 2001; 11:2117-21. [PMID: 11514151 DOI: 10.1016/s0960-894x(01)00390-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
(+/-)-5-Acetoxy-3-(4-fluorophenyl)-2-phenylisoxazolidine has been synthesised by a highly diastereoselective [3+2] cycloaddition reaction between alpha-(4-fluorophenyl)-N-phenylnitrone and vinyl acetate in good yield. Candida rugosa lipase catalyses the deacetylation of this (+/-)-5-acetoxyisoxazolidine in a highly enantioselective fashion in diisopropyl ether containing n-butanol affording (-)-5-acetoxy-3-(4-fluorophenyl)-2-phenylisoxazolidine in 43% yield and >99% ee.
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Affiliation(s)
- S Mukherjee
- Department of Chemistry, University of Delhi, -110 007, Delhi, India
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Poonam, Prasad AK, Azim A, Kumar R, Jain SC, Parmar VS, Olsen CE, Errington W. Synthesis and lipase-mediated stereoselective deacetylation of (±)-3-acetoxymethyl-3-alkyl-7-methoxychroman-4-ones. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00698-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Gulati R, Bhattacharya A, Prasad AK, Gupta R, Parmar VS, Saxena RK. Biocatalytic potential of Fusarium globulosum lipase in selective acetylation/deacetylation reactions and in ester synthesis. J Appl Microbiol 2001; 90:609-13. [PMID: 11309073 DOI: 10.1046/j.1365-2672.2001.01286.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS The present study was carried out to assess the potential of Fusarium globulosum lipase (FGL) for chemoselective and regioselective biotransformations for the synthesis of industrially important organic compounds. METHODS AND RESULTS Different acetylation/deacetylation reactions and ester synthesis reactions were carried out in organic media. Fusarium globulosum lipase showed exclusive selectivity for the acetylation of the alcoholic hydroxyl group over the phenolic hydroxyl group of the hydroxymethylated phenols and aryl alkyl ketones. This also led to the enantiomeric resolution of the aryl alkyl ketone. In contrast, the lipase showed reversed selectivity in deacetylation where it preferred the phenolic acetoxy group over the alcoholic acetoxy moiety of the peracetates of hydroxymethylated compounds. The enzyme also exhibited strict regioselection for deacetylation at the para position of the peracetate of an aryl alkyl ketone. In addition, the lipase also synthesized a variety of industrially important fatty acid esters of sugars, sugar alcohols, alcohols and ascorbic acid with high preference for middle-chain fatty acids. CONCLUSION Fusarium globulosum lipase shows versatile catalytic potential in terms of chemo-, enantio- and regioselectivity and fatty acid specificity in carrying out a variety of industrially important biotransformations. SIGNIFICANCE AND IMPACT OF THE STUDY The biocatalytic potential of FGL can thus be utilized for the synthesis and modification of different types of polyphenolic compounds and esters. These compounds find widespread uses as surfactants, bioactive analogues, antioxidants and flavour components in the food, detergent, pharmaceutical and cosmetic industries.
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Affiliation(s)
- R Gulati
- Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi-110 021, India
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Prasad AK, Pati HN, Azim A, Trikha S. Lipase-catalysed regio- and enantioselective deacetylation of 2,4-diacetoxyphenyl alkyl ketones. Bioorg Med Chem 1999; 7:1973-7. [PMID: 10530946 DOI: 10.1016/s0968-0896(99)00109-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Porcine pancreatic lipase in tetrahydrofuran catalyses the deacetylation of 2,4-diacetoxyphenyl alkyl ketones in a highly regioselective fashion. The strategy of regioselective deacetylation of diacetoxyphenyl alkyl ketones has also resulted in the enantiomeric resolution of a racemic diacetoxyphenyl alkyl ketone, i.e. (+/-)-2,4-diacetoxyphenyl (1-ethyl)pentyl ketone, a precursor for the synthesis of an antifungal coumarin, 7-acetoxy-4-(1-ethyl)pentyl-3-phenyl-2H-1-benzopyran-2-one.
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Affiliation(s)
- A K Prasad
- Department of Chemistry, University of Delhi, India
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Parmar VS, Kumar A, Pati HN, Saxena RK, Davidson S, Gupta R. Potential use of a novel lipase from Aspergillus carneus in deacetylation reactions. BIOCHIMICA ET BIOPHYSICA ACTA 1998; 1387:325-30. [PMID: 9748644 DOI: 10.1016/s0167-4838(98)00148-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A novel lipase from Aspergillus carneus has been used in organic solvents for efficient regioselective and chemoselective deacetylation of the peracetates of polyphenolic aromatic ketones, esters and amides. A reversal of regioselectivity was observed as compared with the results obtained during deacetylation with porcine pancreatic lipase (PPL).
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Affiliation(s)
- V S Parmar
- Department of Chemistry, University of Delhi, Delhi-110 007, India.
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Allevi P, Ciuffreda P, Longo A, Anastasia M. Lipase-catalysed chemoselective monoacetylation of hydroxyalkylphenols and chemoselective removal of a single acetyl group from their diacetates. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s0957-4166(98)00285-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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