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Zhu K, Chen Y, Yu L, Hou C, Qiao X, Wang T. Determination of neotame in various foods by high-performance liquid chromatography coupled with ultraviolet and mass spectrometric detection. Food Chem 2023; 416:135863. [PMID: 36898340 DOI: 10.1016/j.foodchem.2023.135863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 03/01/2023] [Accepted: 03/02/2023] [Indexed: 03/06/2023]
Abstract
A new analytical technique involving protein precipitation, heating, lipid degreasing, and SPE procedures combined with HPLC-UV and HPLC-MS/MS has been developed for the determination of neotame in a variety of food samples. This method is applicable for high-protein, high-lipid, or gum-based solid samples. The limit of detection of the HPLC-UV method was 0.5 μg/mL, while that of the HPLC-MS/MS method was 3.3 ng/mL. The spiked recoveries of neotame in 73 kinds of foods were in the range of 81.1-107.2 % with UV detection. The spiked recoveries obtained by HPLC-MS/MS in 14 kinds of foods ranged from 81.6 % to 105.8 %. This technique was successfully used to determine the contents of neotame in two positive samples, indicating its applicability in food analysis.
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Affiliation(s)
- Kenan Zhu
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo 315211, PR China
| | - Yihui Chen
- Ningbo Customs Technology Center, Ningbo 315040, PR China.
| | - Lanlan Yu
- Ningbo Customs Technology Center, Ningbo 315040, PR China
| | - Chunyan Hou
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA.
| | - Xiaoqiang Qiao
- College of Pharmaceutical Sciences, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, Baoding 071002, PR China
| | - Tingting Wang
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo 315211, PR China; Zhejiang Institute of Tianjin University, Ningbo 315201, PR China.
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2
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Direct determination of absolute stereochemistry of α-methylselenocysteine using the Mosher method. RESULTS IN CHEMISTRY 2021. [DOI: 10.1016/j.rechem.2021.100114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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3
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Crisma M, Formaggio F, Alemán C, Torras J, Ramakrishnan C, Kalmankar N, Balaram P, Toniolo C. The fully‐extended conformation in peptides and proteins. Pept Sci (Hoboken) 2018. [DOI: 10.1002/bip.23100] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Marco Crisma
- Institute of Biomolecular Chemistry, Padova Unit, CNRPadova35131 Italy
| | - Fernando Formaggio
- Institute of Biomolecular Chemistry, Padova Unit, CNRPadova35131 Italy
- Department of ChemistryUniversity of PadovaPadova35131 Italy
| | - Carlos Alemán
- Departament d'Enginyeria QuímicaEEBE, Universitat Politècnica de CatalunyaBarcelona08019 Spain
- Barcelona Research Center in Multiscale Science and EngineeringUniversitat Politècnica de CatalunyaBarcelona08019 Spain
| | - Joan Torras
- Departament d'Enginyeria QuímicaEEBE, Universitat Politècnica de CatalunyaBarcelona08019 Spain
- Barcelona Research Center in Multiscale Science and EngineeringUniversitat Politècnica de CatalunyaBarcelona08019 Spain
| | | | - Neha Kalmankar
- National Centre for Biological Sciences (TIFR), GKVK CampusBangalore560065 India
| | | | - Claudio Toniolo
- Institute of Biomolecular Chemistry, Padova Unit, CNRPadova35131 Italy
- Department of ChemistryUniversity of PadovaPadova35131 Italy
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Lühning LH, Strehl J, Schmidtmann M, Doye S. Hydroaminoalkylation of Allylsilanes and a One-Pot Procedure for the Synthesis of 1,5-Benzoazasilepines. Chemistry 2017; 23:4197-4202. [PMID: 28124797 DOI: 10.1002/chem.201605923] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 01/26/2017] [Indexed: 11/11/2022]
Abstract
Allylsilanes undergo highly regioselective intermolecular alkene hydroaminoalkylation with secondary amines in the presence of a titanium mono(formamidinate) catalyst. Corresponding reactions of a suitable allyl(2-bromophenyl)silane which exclusively deliver the branched hydroaminoalkylation products combined with a subsequent Buchwald-Hartwig amination result in the development of an elegant one-pot procedure for the synthesis of literature-unknown silicon analogues of 1,5-benzodiazepines, the so-called 1,5-benzoazasilepines.
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Affiliation(s)
- Lars H Lühning
- Institut für Chemie, Universität Oldenburg, Carl-von-Ossietzky-Straße 9-11, 26111, Oldenburg, Germany
| | - Julia Strehl
- Institut für Chemie, Universität Oldenburg, Carl-von-Ossietzky-Straße 9-11, 26111, Oldenburg, Germany
| | - Marc Schmidtmann
- Institut für Chemie, Universität Oldenburg, Carl-von-Ossietzky-Straße 9-11, 26111, Oldenburg, Germany
| | - Sven Doye
- Institut für Chemie, Universität Oldenburg, Carl-von-Ossietzky-Straße 9-11, 26111, Oldenburg, Germany
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Smith ME, Fibinger MPC, Bornscheuer UT, Masterson DS. An Investigation of the Interaction of Co-Solvent with Substrates in the Pig Liver Esterase-Catalyzed Hydrolysis of Malonate Esters. ChemCatChem 2015. [DOI: 10.1002/cctc.201500597] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Maureen E. Smith
- Department of Chemistry and Biochemistry; The University of Southern Mississippi; 118 College Drive 5043 Hattiesburg MS 39406 USA
| | - Michael P. C. Fibinger
- Institute of Biochemistry; Department of Biotechnology and Enzyme Catalysis; Greifswald University; Felix-Hausdorff-Strasse 4 17487 Greifswald Germany
| | - Uwe T. Bornscheuer
- Institute of Biochemistry; Department of Biotechnology and Enzyme Catalysis; Greifswald University; Felix-Hausdorff-Strasse 4 17487 Greifswald Germany
| | - Douglas S. Masterson
- Department of Chemistry and Biochemistry; The University of Southern Mississippi; 118 College Drive 5043 Hattiesburg MS 39406 USA
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Mollica A, Mirzaie S, Costante R, Carradori S, Macedonio G, Stefanucci A, Dvoracsko S, Novellino E. Exploring the biological consequences of conformational changes in aspartame models containing constrained analogues of phenylalanine. J Enzyme Inhib Med Chem 2015; 31:953-63. [PMID: 26308194 DOI: 10.3109/14756366.2015.1076811] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The dipeptide aspartame (Asp-Phe-OMe) is a sweetener widely used in replacement of sucrose by food industry. 2',6'-Dimethyltyrosine (DMT) and 2',6'-dimethylphenylalanine (DMP) are two synthetic phenylalanine-constrained analogues, with a limited freedom in χ-space due to the presence of methyl groups in position 2',6' of the aromatic ring. These residues have shown to increase the activity of opioid peptides, such as endomorphins improving the binding to the opioid receptors. In this work, DMT and DMP have been synthesized following a diketopiperazine-mediated route and the corresponding aspartame derivatives (Asp-DMT-OMe and Asp-DMP-OMe) have been evaluated in vivo and in silico for their activity as synthetic sweeteners.
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Affiliation(s)
- Adriano Mollica
- a Dipartimento di Farmacia, Università di Chieti-Pescara "G. d'Annunzio" , Chieti , Italy
| | - Sako Mirzaie
- b Department of Biochemistry, Sanandaj Branch , Islamic Azad University , Sanandaj , Iran
| | - Roberto Costante
- a Dipartimento di Farmacia, Università di Chieti-Pescara "G. d'Annunzio" , Chieti , Italy
| | - Simone Carradori
- a Dipartimento di Farmacia, Università di Chieti-Pescara "G. d'Annunzio" , Chieti , Italy
| | - Giorgia Macedonio
- a Dipartimento di Farmacia, Università di Chieti-Pescara "G. d'Annunzio" , Chieti , Italy
| | | | - Szabolcs Dvoracsko
- d Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences , Temesvari krt , Hungary , and
| | - Ettore Novellino
- e Dipartimento di Farmacia, Università di Napoli "Federico II" , Naples , Italy
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Reid CM, Fanning KN, Fowler LS, Sutherland A. Synthesis and reactivity of 4-oxo-5-trimethylsilanyl derived α-amino acids. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.11.059] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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8
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Ramesh R, Reddy DS. Zinc mediated allylations of chlorosilanes promoted by ultrasound: Synthesis of novel constrained sila amino acids. Org Biomol Chem 2014; 12:4093-7. [DOI: 10.1039/c4ob00294f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A simple, fast and efficient method for allylation and propargylation of chlorosilanes through zinc mediation and ultrasound promotion is reported. As a direct application of the resulting bis-allylsilanes, three novel, constrained sila amino acids are prepared for the first time.
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Affiliation(s)
- Remya Ramesh
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune, India
| | - D. Srinivasa Reddy
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune, India
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