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Chen H, Zhang Y, Wen Y, Fan X, Sciolino N, Lin Y, Breindel L, Dai Y, Shekhtman A, Xue XS, Zhang Q. Production of constrained L-cyclo-tetrapeptides by epimerization-resistant direct aminolysis. Nat Commun 2024; 15:5372. [PMID: 38918367 PMCID: PMC11199569 DOI: 10.1038/s41467-024-49329-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 05/30/2024] [Indexed: 06/27/2024] Open
Abstract
The synthesis of constrained 12-membered rings is notably difficult. The main challenges result from constraints during the linear peptide cyclization. Attempts to overcome constraints through excessive activation frequently cause peptidyl epimerization, while insufficient activation of the C-terminus hampers cyclization and promotes intermolecular oligomer formation. We present a β-thiolactone framework that enables the synthesis of cyclo-tetrapeptides via direct aminolysis. This tactic utilizes a mechanism that restricts C-terminal carbonyl rotation while maintaining high reactivity, thereby enabling efficient head-to-tail amidation, reducing oligomerization, and preventing epimerization. A broad range of challenging cyclo-tetrapeptides ( > 20 examples) are synthesized in buffer and exhibits excellent tolerance toward nearly all proteinogenic amino acids. Previously unattainable macrocycles, such as cyclo-L-(Pro-Tyr-Pro-Val), have been produced and identified as μ-opioid receptor (MOR) agonists, with an EC50 value of 2.5 nM. Non-epimerizable direct aminolysis offers a practical solution for constrained peptide cyclization, and the discovery of MOR agonist activity highlights the importance of overcoming synthetic challenges for therapeutic development.
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Affiliation(s)
- Huan Chen
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA
| | - Yuchen Zhang
- Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, 200032, Shanghai, China
| | - Yuming Wen
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA
| | - Xinhao Fan
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA
| | - Nicholas Sciolino
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA
| | - Yanyun Lin
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA
| | - Leonard Breindel
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA
| | - Yuanwei Dai
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA
| | - Alexander Shekhtman
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA.
| | - Xiao-Song Xue
- Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, 200032, Shanghai, China.
| | - Qiang Zhang
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA.
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Mergulhão NLON, Bulhões LCG, Silva VC, Duarte IFB, Basílio-Júnior ID, Freitas JD, Oliveira AJ, Goulart MOF, Barbosa CV, Araújo-Júnior JX. Insights from Syzygium aromaticum Essential Oil: Encapsulation, Characterization, and Antioxidant Activity. Pharmaceuticals (Basel) 2024; 17:599. [PMID: 38794169 PMCID: PMC11124181 DOI: 10.3390/ph17050599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2024] [Revised: 04/28/2024] [Accepted: 05/02/2024] [Indexed: 05/26/2024] Open
Abstract
Alginate encapsulates loaded with clove essential oil (CEO) were prepared by ionic gelation, with subsequent freeze-drying. The objective of the present work was to develop a product with the ability to protect CEO against its easy volatility and oxidation. The following techniques were used to characterize the formulations: eugenol release, degree of swelling, GC/MS, TGA/DSC, and SEM. The alginate solution (1.0%) containing different concentrations of CEO (LF1: 1.0%; LF2: 0.5%; LF3: 0.1%) was dropped into a 3.0% CaCl2 solution. After lyophilization, the encapsulated samples were wrinkled and rigid, with high encapsulation power (LF3: 76.9% ± 0.5). Three chemical components were identified: eugenol (the major one), caryophyllene, and humulene. The antioxidant power (LF1: DPPH IC50 18.1 µg mL-1) was consistent with the phenol content (LF1: 172.2 mg GAE g-1). The encapsulated ones were thermally stable, as shown by analysis of FTIR peaks, eugenol molecular structure was kept unaltered. The degree of swelling was 19.2% (PBS). The release of eugenol (92.5%) in the PBS solution was faster than in the acidic medium. It was concluded that the low-cost technology used allows the maintenance of the content and characteristics of CEO in the three concentrations tested, offering a basis for further research with essential oil encapsulates.
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Affiliation(s)
- Naianny L. O. N. Mergulhão
- Institute of Pharmaceutical Sciences, Federal University of Alagoas (UFAL), Maceió 57072-900, Brazil; (N.L.O.N.M.); (L.C.G.B.); (I.D.B.-J.); (C.V.B.)
- Program of the Northeast Biotechnology Network (RENORBIO), Institute of Chemistry and Biotechnology, Federal University of Alagoas (UFAL), Maceió 57072-900, Brazil;
| | - Laisa C. G. Bulhões
- Institute of Pharmaceutical Sciences, Federal University of Alagoas (UFAL), Maceió 57072-900, Brazil; (N.L.O.N.M.); (L.C.G.B.); (I.D.B.-J.); (C.V.B.)
- Program of the Northeast Biotechnology Network (RENORBIO), Institute of Chemistry and Biotechnology, Federal University of Alagoas (UFAL), Maceió 57072-900, Brazil;
| | - Valdemir C. Silva
- Program of the Northeast Biotechnology Network (RENORBIO), Institute of Chemistry and Biotechnology, Federal University of Alagoas (UFAL), Maceió 57072-900, Brazil;
- Estácio de Alagoas Faculty, Maceió 57035-225, Brazil
| | - Ilza F. B. Duarte
- Institute of Pharmaceutical Sciences, Federal University of Alagoas (UFAL), Maceió 57072-900, Brazil; (N.L.O.N.M.); (L.C.G.B.); (I.D.B.-J.); (C.V.B.)
- Program of the Northeast Biotechnology Network (RENORBIO), Institute of Chemistry and Biotechnology, Federal University of Alagoas (UFAL), Maceió 57072-900, Brazil;
| | - Irinaldo D. Basílio-Júnior
- Institute of Pharmaceutical Sciences, Federal University of Alagoas (UFAL), Maceió 57072-900, Brazil; (N.L.O.N.M.); (L.C.G.B.); (I.D.B.-J.); (C.V.B.)
| | - Johnnatan D. Freitas
- Department of Food Chemistry, Federal Institute of Alagoas, Maceió 57020-600, Brazil;
| | - Adeildo J. Oliveira
- Department of Exact Sciences, Federal University of Alagoas, Arapiraca 57309-005, Brazil;
| | - Marília O. F. Goulart
- Program of the Northeast Biotechnology Network (RENORBIO), Institute of Chemistry and Biotechnology, Federal University of Alagoas (UFAL), Maceió 57072-900, Brazil;
| | - Círia V. Barbosa
- Institute of Pharmaceutical Sciences, Federal University of Alagoas (UFAL), Maceió 57072-900, Brazil; (N.L.O.N.M.); (L.C.G.B.); (I.D.B.-J.); (C.V.B.)
| | - João X. Araújo-Júnior
- Institute of Pharmaceutical Sciences, Federal University of Alagoas (UFAL), Maceió 57072-900, Brazil; (N.L.O.N.M.); (L.C.G.B.); (I.D.B.-J.); (C.V.B.)
- Program of the Northeast Biotechnology Network (RENORBIO), Institute of Chemistry and Biotechnology, Federal University of Alagoas (UFAL), Maceió 57072-900, Brazil;
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3
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Catalytic Multi-Step Continuous-flow Processes for Scalable Transformation of Eugenol into Potential Fragrances. Catal Today 2023. [DOI: 10.1016/j.cattod.2023.114055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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New insight into the mechanism of isomerization of C5–C7 alkanes over MoO3/FST. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2022.112873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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5
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de Oliveira ADN, Ferreira IM, Jimenez DEQ, da Silva LS, da Costa AAF, Lima ETL, Costa FF, da Luz PTS, Rocha Filho GND, Osman SM, Luque R, Nascimento LASD. Mining waste valorisation to catalytically active mesoporous materials for the esterification of fatty acid palm oil waste. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Nasiri E, Kooshki F, Kooti M, Rezaeinasab R. Functionalized nanomagnetic graphene by ion liquid containing phosphomolybdic acid for facile and fast synthesis of paracetamol and aspirin. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Elahe Nasiri
- Department of Chemistry Shahid Chamran University of Ahvaz Ahvaz Iran
| | - Feridoon Kooshki
- Department of Chemistry Shahid Chamran University of Ahvaz Ahvaz Iran
| | - Mohammad Kooti
- Department of Chemistry Shahid Chamran University of Ahvaz Ahvaz Iran
| | - Rezvan Rezaeinasab
- Department of Medicinal Chemistry, School of Pharmacy Lorestan University of Medical Sciences Khorramabad Iran
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Tarhan İ. A robust method for simultaneous quantification of eugenol, eugenyl acetate, and β-caryophyllene in clove essential oil by vibrational spectroscopy. PHYTOCHEMISTRY 2021; 191:112928. [PMID: 34455289 DOI: 10.1016/j.phytochem.2021.112928] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 08/18/2021] [Accepted: 08/20/2021] [Indexed: 06/13/2023]
Abstract
Attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy in tandem with chemometrics was used for accurate quantification of total eugenol, eugenyl acetate, and β-caryophyllene compounds of clove oil (CO) using partial least squares (PLS) regression with various spectral derivatization methods. A set of six of the fifty-one CO samples was chosen to build up the calibration sets for the compounds, while the rest were selected as the prediction set. Data for total eugenol, eugenyl acetate, and β-caryophyllene was acquired by gas chromatography-mass spectrometry (GC-MS) and used as reference values for ATR-FTIR calibration. The best calibration results were achieved using raw spectra in the region 1560-1480, 1814-1700, and 2954-2780 cm-1 for total eugenol, eugenyl acetate, and β-caryophyllene with high regression coefficients (R-square) of 0.9999, 0.9966, and 0.9997, respectively and low root mean square error of prediction (RMSEP) values of 0.5054%, 0.2330%, and 0.4593%, respectively. The results of the study indicated that ATR-FTIR with PLS regression could be used for accurate and simultaneous quantification of total eugenol, eugenyl acetate, and β-caryophyllene compounds of COs without using any toxic chemicals or pretreatments.
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Affiliation(s)
- İsmail Tarhan
- Selçuk University, Faculty of Science, Department of Biochemistry, 42130, Selçuklu, Konya, Turkey.
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Lopes SQ, Holanda FH, Jimenez DEQ, do Nascimento LAS, Oliveira AN, Ferreira IM. Use of Oxone® as a Potential Catalyst in Biodiesel Production from Palm Fatty Acid Distillate (PFAD). Catal Letters 2021. [DOI: 10.1007/s10562-021-03698-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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An Efficient Catalyst Prepared from Residual Kaolin for the Esterification of Distillate from the Deodorization of Palm Oil. Catalysts 2021. [DOI: 10.3390/catal11050604] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The distillate from the deodorization of palm oil (DDPO) is an agro-industrial residue, approximately 84% of which consists of free fatty acids (FFAs), which can be used for the production of fatty acid ethyl esters (FAEE). A catalyst (10HPMo/AlSiM) obtained from a waste material, Amazon flint kaolin, was applied in the esterification of the DDPO, reaching a conversion index of 94%, capable of maintaining satisfactory activity (>75%) after four consecutive cycles. Flint kaolin is therefore proven to be an efficient option in the search for new heterogeneous low-cost catalysts obtained from industrial by-products, contributing to the reduction of environmental impact and adding value to widely available wastes that would otherwise be discarded directly into the environment. Based on the catalytic results, esterification of DDPO using 10HPMo/AlSiM can be a cheaper alternative for the production of sustainable fuels.
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Organic Reactions Using Clay and Clay-Supported Catalysts: A Survey of Recent Literature. CATALYSIS SURVEYS FROM ASIA 2021. [DOI: 10.1007/s10563-021-09333-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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de Oliveira ADN, de Oliveira DT, Angélica RS, Andrade EHDA, da Silva JKDR, Rocha Filho GND, Coral N, Pires LHDO, Luque R, do Nascimento LAS. Efficient esterification of eugenol using a microwave-activated waste kaolin. REACTION KINETICS MECHANISMS AND CATALYSIS 2020. [DOI: 10.1007/s11144-020-01797-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Acetylation of Eugenol on Functionalized Mesoporous Aluminosilicates Synthesized from Amazonian Flint Kaolin. Catalysts 2020. [DOI: 10.3390/catal10050478] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The present work was aimed to investigate the catalytic activity of a mesoporous catalyst synthesized from 3-mercaptopropyltrimethoxysilane (MPTS) functionalized Amazonian flint kaolin in the acetylation of eugenol with acetic anhydride. Materials were characterized by thermogravimetry (TGA), N2 adsorption (BET), X-ray dispersive energy spectroscopy (EDX), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and acid-base titration. The results presented proved the efficiency of flint kaolin as an alternative source in the preparation of mesoporous materials, since the material exhibited textural properties (specific surface area of 1071 m2 g−1, pore volume of 1.05 cm3 g−1 and pore diameter of 3.85 nm) and structural properties (d100 = 4.35 nm, a0 = 5.06 nm and Wt = 1.21 nm) within the required and characteristic material standards. The catalyst with the total amount of acidic sites of 4.89 mmol H+ g−1 was efficient in converting 99.9% of eugenol (eugenol to acetic anhydride molar ratio of 1:5, 2% catalyst, temperature and reaction time 80 °C and 40 min reaction). In addition, the reused catalyst could be successfully recycled with 92% conversion activity under identical reaction conditions.
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