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Saffarionpour S, Diosady LL. Preparation and characterization of an iron-β-cyclodextrin inclusion complex: factors influencing the host-guest interaction. Food Funct 2023. [PMID: 37161593 DOI: 10.1039/d3fo00090g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Cyclodextrins have received attention recently due to their superior binding with countless hydrophobic molecules. The host-guest interaction between the cyclodextrin cavity and the hydrophobic component not only facilitates the formation of a strong inclusion complex (IC), but also improves its stability against thermal degradation. The functionality of cyclodextrins for the delivery of hydrophilic components is less explored in comparison. This study discusses the application of β-cyclodextrin (βCD) for the delivery of highly bioavailable and hydrophilic iron, ferric sodium EDTA, which exhibits great functionality in the presence of polyphenols and phytates with potential application in food fortification. The formation of IC was dependent on the cyclodextrin amount and alcoholic co-solvent and was influenced by the stirring duration. For ferric sodium EDTA, the highest inclusion rate (IR) of ∼77% was obtained after 72 hours of mixing in 25.4% (v/v) alcohol at a ratio of iron : βCD of 1 : 6. A higher IR (∼96%) was obtained after 6 hours of stirring with less soluble ferrous ammonium phosphate in comparison. The melting temperature (Tm) of the ferrous ammonium phosphate complex increased from ∼172 to ∼294 °C. The high IR and enhanced thermal resistance of the complex make βCDs potential carriers for ferrous ammonium phosphate delivery and fortification of foods processed at high temperatures.
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Affiliation(s)
- Shima Saffarionpour
- University of Toronto, Department of Chemical Engineering and Applied Chemistry, Toronto, Ontario, Canada.
| | - Levente L Diosady
- University of Toronto, Department of Chemical Engineering and Applied Chemistry, Toronto, Ontario, Canada.
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2
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Tajbakhsh M, Naimi-Jamal MR. Copper-doped functionalized β-cyclodextrin as an efficient green nanocatalyst for synthesis of 1,2,3-triazoles in water. Sci Rep 2022; 12:4948. [PMID: 35322100 PMCID: PMC8943073 DOI: 10.1038/s41598-022-08868-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 03/07/2022] [Indexed: 12/04/2022] Open
Abstract
The synthesis of 1,2,3-triazoles with immobilized Cu(I) in thiosemicarbazide-functionalized β-cyclodextrin (Cu@TSC-β-CD) as a supramolecular catalyst was discussed. The catalyst was characterized by Fourier-transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) measurements. The catalyst showed high activity (up to 95% yields of triazole products under optimized reaction conditions), providing a one-pot, atom-economic, and highly regioselective green method for 1,2,3-triazoles synthesis in an azide-alkyne cycloaddition (AAC) protocol in water. High stability and no appreciable leaching of Cu(I) were observed, owing to its strong binding via the coordination with thiosemicarbazide functionality.
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Affiliation(s)
- Mahdieh Tajbakhsh
- Research Laboratory of Green Organic Synthesis and Polymers, Department of Chemistry, Iran University of Science and Technology, P.O. Box 16846-13114, Tehran, Iran
| | - Mohammad Reza Naimi-Jamal
- Research Laboratory of Green Organic Synthesis and Polymers, Department of Chemistry, Iran University of Science and Technology, P.O. Box 16846-13114, Tehran, Iran.
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3
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Křížová L, Němcová Z, Dadáková K, Chrenková M. In sacco evaluation of ruminal degradability of isoflavones from full-fat soybean and extracted soybean meal-A pilot study. J Anim Physiol Anim Nutr (Berl) 2021; 105:832-840. [PMID: 33656771 DOI: 10.1111/jpn.13511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 01/15/2021] [Accepted: 02/01/2021] [Indexed: 11/30/2022]
Abstract
The aim of the study was to determine the ruminal degradability of dry matter (DM), daidzein, genistein, glycitein and total isoflavones in ground full-fat soybean (GFFS) and solvent-extracted soybean meal (SSBM) using the in sacco method. The experiment was carried out in three replications on ruminally cannulated sheep that were fed twice a day with a diet consisted of hay and supplemental mixture (6:4, DM basis). The nylon bags with 2 g feed samples ground to 2 mm were incubated in the rumen for 0, 2, 4, 8, 16 and 24 h. The effective degradability (ED) of DM, daidzein, genistein, glycitein and total isoflavones was calculated at outflow rate of 0.06 h. The ED of DM in GFFS was 77.8% and was higher than in SSBM being 71.8% (p < 0.001). The ED of daidzein (96.8%) and genistein (93.6%) was higher for SSBM compared with GFFS (93.9% and 92.8%, p < 0.001 and p = 0.003, respectively) while ED of glycitein was lower for SSBM than for GFFS (75.5 and 81.7%, respectively, p < 0.001). All isoflavones in the incubations were extensively degraded in the rumen, and regardless of dietary source, they were almost completely degraded after 16 h of incubation. Further, the disappearance patterns, that is the functions describing the time courses of the analyte disappearance, were assessed. The disappearance patterns of daidzein, genistein, glycitein and total isoflavones were similar and showed greater disappearance of mentioned isoflavones from SSBM compared to GFFS (p < 0.001 for daidzein, genistein and total isoflavones and p = 0.002 for glycitein). The study provides knowledge on the effect of processing on degradability of isoflavones in rumen that can be used to clarify the interrelationship between isoflavones and rumen microbiota.
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Affiliation(s)
- Ludmila Křížová
- Department of Animal Breeding, Animal Nutrition and Biochemistry, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
| | - Zuzana Němcová
- Department of Animal Breeding, Animal Nutrition and Biochemistry, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
| | - Kateřina Dadáková
- Department of Biochemistry, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Mária Chrenková
- Department for Nutrition, Research Institute for Animal Production in Nitra, National Agricultural and Food Centre, Luzianky, Slovak Republic
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Jiao Y, Peng J, Ye X, Hu H, Gan L, Yang J, Peng Y. Study on pharmacological properties and cell absorption metabolism of novel daidzein napsylates. ROYAL SOCIETY OPEN SCIENCE 2021; 8:201475. [PMID: 33614082 PMCID: PMC7890489 DOI: 10.1098/rsos.201475] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 11/18/2020] [Indexed: 06/12/2023]
Abstract
Novel daidzein napsylates (DD4 and DD5) were synthesized by microwave irradiation, according to structural modification of daidzein (DAI) using the principle of pharmacokinetic transformation. The pharmacological properties of DD4 and DD5 were evaluated via high performance liquid chromatography (HPLC) and calculated based on the drug design software ChemAxon 16.1.18. The cell uptake changes of DD4 and DD5 were investigated to analyse the structure-property relationship. The metabolisms of DD4 and DD5 were analysed by HPLC-mass spectrometry in human aortic vascular smooth muscle cells (HAVSMCs) and their possible metabolic pathways were inferred in vivo. The results showed that the solubility of DD4 and DD5 was increased by 2.79 × 105 and 2.16 × 105 times compared to that of DAI, separately, in ethyl acetate. The maximum absorption rates of DD4 and DD5 were enhanced by 4.3-4.5 times relative to DAI. Preliminary studies on metabolites of DD4 and DD5 in HAVSMCs showed that DD4 and DD5 were hydrolysed into DAI under the action of intracellular hydrolase in two ways, ester hydrolysis or ether hydrolysis. Then, DAI was combined with glucuronic acid to form daidzein monoglucuronate under the action of uridine diphosphate (UDP)-glucuronidase. Meanwhile, it was also found that metabolite M5 of DD5 could undergo glucuronidation under the action of UDP-glucuronosyltransferase and competitive sulphation under the action of sulphotransferase to produce its sulfate conjugate M7. Analysis of structure-property relationships indicated that the absorption and utilization of drugs is closely relative to the physical properties and could be improved by adjusting the liposolubility. The pharmaceutical properties were optimized comprehensively after DAI was modified by naphthalene sulphonate esterification. This indicates that this kind of derivatives may have relatively good absorption and transport characteristics and biological activities in vivo. The research on biological activities of the new derivatives (DD4 and DD5) is ongoing in our laboratory.
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Affiliation(s)
- Yanxiao Jiao
- Jangxi Province Engineering Research Center of Ecological Chemical Industry, Jiujiang University, Jiujiang, People's Republic of China
| | - Jing Peng
- College of Traditional Chinese Medicine, Inner Mongolia Medical University, Hohhot, People's Republic of China
| | - Xinglin Ye
- College of Chemistry and Environmental Engineering, Jiujiang University, Jiujiang, People's Republic of China
| | - Huanan Hu
- College of Chemistry and Environmental Engineering, Jiujiang University, Jiujiang, People's Republic of China
| | - Lijun Gan
- School of Nursing, Jiujiang University, Jiujiang, People's Republic of China
| | - Jianyuan Yang
- College of Pharmaceutical and Life Sciences, Jiujiang University, Jiujiang, People's Republic of China
| | - You Peng
- Jangxi Province Engineering Research Center of Ecological Chemical Industry, Jiujiang University, Jiujiang, People's Republic of China
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5
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Improved Pharmacokinetics and Tissue Uptake of Complexed Daidzein in Rats. Pharmaceutics 2020; 12:pharmaceutics12020162. [PMID: 32079113 PMCID: PMC7076374 DOI: 10.3390/pharmaceutics12020162] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 02/06/2020] [Accepted: 02/11/2020] [Indexed: 12/17/2022] Open
Abstract
The pharmacokinetic profile and tissue uptake of daidzein (DAI) was determined in rat serum and tissues (lungs, eyes, brain, heart, spleen, fat, liver, kidney, and testes) after intravenous and intraperitoneal administration of DAI in suspension or complexed with ethylenediamine-modified γ-cyclodextrin (GCD-EDA/DAI). The absolute and relative bioavailability of DAI suspended (20 mg/kg i.v. vs. 50 mg/kg i.p.) and complexed (0.54 mg/kg i.v. vs. 1.35 mg/kg i.p.) was determined. After i.p. administration, absorption of DAI complexed with GCD-EDA was more rapid (tmax = 15 min) than that of DAI in suspension (tmax = 45 min) with a ca. 3.6 times higher maximum concentration (Cmax = 615 vs. 173 ng/mL). The i.v. half-life of DAI was longer in GCD-EDA/DAI complex compared with DAI in suspension (t0.5 = 380 min vs. 230 min). The volume of distribution of DAI given i.v. in GCD-EDA/DAI complex was ca. 6 times larger than DAI in suspension (38.6 L/kg vs. 6.2 L/kg). Our data support the concept that the pharmacokinetics of DAI suspended in high doses are nonlinear. Increasing the intravenous dose 34 times resulted in a 5-fold increase in AUC. In turn, increasing the intraperitoneal dose 37 times resulted in a ca. 2-fold increase in AUC. The results of this study suggested that GCD-EDA complex may improve DAI bioavailability after i.p. administration. The absolute bioavailability of DAI in GCD-EDA inclusion complex was ca. 3 times greater (F = 82.4% vs. 28.2%), and the relative bioavailability was ca. 21 times higher than that of DAI in suspension, indicating the need to study DAI bioavailability after administration by routes other than intraperitoneal, e.g., orally, subcutaneously, or intramuscularly. The concentration of DAI released from GCD-EDA/DAI inclusion complex to all the rat tissues studied was higher than after administration of DAI in suspension. The concentration of DAI in brain and lungs was found to be almost 90 and 45 times higher, respectively, when administered in complex compared to the suspended DAI. Given the nonlinear relationship between DAI bioavailability and the dose released from the GCD-EDA complex, complexation of DAI may thus offer an effective approach to improve DAI delivery for treatment purposes, for example in mucopolysaccharidosis (MPS), allowing the reduction of ingested DAI doses.
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Binding behavior, water solubility and in vitro cytotoxicity of inclusion complexes between ursolic acid and amino-appended β-cyclodextrins. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111993] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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7
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Zhao J, Yang J, Xie Y. Improvement strategies for the oral bioavailability of poorly water-soluble flavonoids: An overview. Int J Pharm 2019; 570:118642. [DOI: 10.1016/j.ijpharm.2019.118642] [Citation(s) in RCA: 135] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 08/20/2019] [Accepted: 08/21/2019] [Indexed: 01/29/2023]
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8
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Song S, Gao K, Niu R, Wang J, Zhang J, Gao C, Yang B, Liao X. Inclusion complexes between chrysin and amino-appended β-cyclodextrins (ACDs): Binding behavior, water solubility, in vitro antioxidant activity and cytotoxicity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 106:110161. [PMID: 31753384 DOI: 10.1016/j.msec.2019.110161] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 08/12/2019] [Accepted: 09/03/2019] [Indexed: 10/26/2022]
Abstract
Solid inclusion complexes between chrysin and four amino-appended β-cyclodextrins (ACDs) were prepared by suspension method and characterized in solid and solution states by kinds of analytical methods. The scanning electron microscopy (SEM) showed distinct micro-morphologies of them. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) analysis revealed their unique thermal properties, such as decomposition temperatures and endothermic points. Powder X-ray diffractometry (XRD) analysis disclosed their unique crystal patterns. Their nuclear magnetic resonance (NMR) analyses provided the variations of chemical shifts before and after the formation of inclusion complexes. Their binding stability constants (Ks) were 574, 842, 704, and 474 L·mol-1, respectively, as determined by spectral titration. A 1:1 inclusion mode with self-assembly of their amino side chains inside the ACD cavity was proposed based on Job plot and 2D-ROESY experiments. Water solubility of chrysin was promoted up to 4411.98 μg·mL-1 after formation of inclusion complexes with ACDs, better than that of β-CD and its derivatives, i.e., HP- and SBE-β-CD. In vitro antioxidant activity of chrysin was also improved after inclusion complexation by the DPPH scavenging assay. Furthermore, in vitro cytotoxicity of solid inclusion complexes towards three human cancer cell lines, A549, HT-29 and HCT116 were enhanced significantly.
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Affiliation(s)
- Shuang Song
- Faculty of Life Science and Technology, Kunming University of Science and Technology, 650500 Kunming, China
| | - Kai Gao
- Faculty of Life Science and Technology, Kunming University of Science and Technology, 650500 Kunming, China
| | - Raomei Niu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, 650500 Kunming, China; Jiangsu Xinchen Pharmaceutical Co., LTD, 222047 Lianyungang, China
| | - Jin Wang
- School of Pharmacy, Jiangsu Key Laboratory for Bioresources of Saline Soils, Yancheng Teachers University, 224007 Yancheng, China
| | - Jihong Zhang
- Faculty of Medicine, Kunming University of Science and Technology, Kunming 650500, China; Research Centre for Pharmaceutical Care and Quality Management, First People's Hospital of Yunnan Province, Kunming 650500, China
| | - Chuanzhu Gao
- Faculty of Life Science and Technology, Kunming University of Science and Technology, 650500 Kunming, China
| | - Bo Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, 650500 Kunming, China
| | - Xiali Liao
- Faculty of Life Science and Technology, Kunming University of Science and Technology, 650500 Kunming, China.
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Huang S, Xue Q, Xu J, Ruan S, Cai T. Simultaneously Improving the Physicochemical Properties, Dissolution Performance, and Bioavailability of Apigenin and Daidzein by Co-Crystallization With Theophylline. J Pharm Sci 2019; 108:2982-2993. [DOI: 10.1016/j.xphs.2019.04.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 04/03/2019] [Accepted: 04/10/2019] [Indexed: 11/15/2022]
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10
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JIN W, LI FY, HUANG YR, YANG HW, CHI SM, ZHU HY, LEI Z, ZHAO Y. Preparation and Properties Study of Inclusion Complex of Triptonide with 2,6-Dimethyl-β-cyclodextrin. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2019. [DOI: 10.1016/s1872-2040(19)61181-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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11
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Wang H, Xiao Y, Wang H, Sang Z, Han X, Ren S, Du R, Shi X, Xie Y. Development of daidzein nanosuspensions: Preparation, characterization, in vitro evaluation, and pharmacokinetic analysis. Int J Pharm 2019; 566:67-76. [PMID: 31125715 DOI: 10.1016/j.ijpharm.2019.05.051] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 05/01/2019] [Accepted: 05/19/2019] [Indexed: 01/31/2023]
Abstract
The purpose of this investigation was to improve the solubility and oral bioavailability of daidzein via preparing nanosuspensions (NS) with steric stabilizers, electrostatic stabilizers, or a combination of both. Based on particle size and zeta potential, daidzein NS stabilized by HP-β-CD, soy lecithin, HP-β-CD + soy lecithin, TPGS, TPGS + SBE-β-CD, SDS, or HPMC E5 + SDS were generated and characterized by scanning electron microscopy, powder X-ray diffraction, and Fourier transform-infrared spectroscopy. In addition, the stability, cytotoxicity, solubility, dissolution, and pharmacokinetics of NS were evaluated. The resulting daidzein NS were physically stable and biocompatible and presented as regular shapes with homogenous particle sizes of 360-600 nm and decreased crystallinity. Due to the increased solubility and dissolution rate, the oral bioavailability of daidzein NS in rats was 1.63-2.19 times greater than that of crude daidzein. In particular, among the investigated seven daidzein NS formulations, daidzein NS prepared with the costabilizers HPMC E5 + SDS is an optimal formulation for increased daidzein bioavailability. The present study proposes that the combined usage of steric and electrostatic stabilizers is a promising strategy for improving the bioavailability of water-insoluble flavonoid compounds by an NS approach.
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Affiliation(s)
- Hui Wang
- Research Center for Health and Nutrition, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; Pharmacy Department, Long Hua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Yi Xiao
- Research Center for Health and Nutrition, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Hai Wang
- Research Center for Health and Nutrition, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Zechun Sang
- Research Center for Health and Nutrition, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Xiaole Han
- Research Center for Health and Nutrition, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Shuzhen Ren
- Research Center for Health and Nutrition, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Ruofei Du
- Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Xiufeng Shi
- Pharmacy Department, Long Hua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China.
| | - Yan Xie
- Research Center for Health and Nutrition, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
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12
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Study on Molecular Recognition of Pinocembrin with Methylated-β-Cyclodextrin. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2019. [DOI: 10.1016/s1872-2040(19)61147-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Chen Y, Zuo Z, Dai X, Xiao P, Fang X, Wang X, Wang W, Ding CF. Gas-phase complexation of α-/β-cyclodextrin with amino acids studied by ion mobility-mass spectrometry and molecular dynamics simulations. Talanta 2018; 186:1-7. [DOI: 10.1016/j.talanta.2018.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 03/28/2018] [Accepted: 04/01/2018] [Indexed: 01/11/2023]
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14
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Li Y, Zhang X, Bai X, Li X, Jiang Q, Zhang T. A sensitive, high-throughput, and eco-friendly analysis of daidzein and its valine carbamate prodrug in rat plasma by supercritical fluid chromatography with tandem mass spectrometry. J Sep Sci 2018; 41:3250-3257. [DOI: 10.1002/jssc.201800430] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 06/28/2018] [Accepted: 07/03/2018] [Indexed: 12/23/2022]
Affiliation(s)
- Yingchao Li
- Department of Pharmaceutical Analysis, School of Pharmacy; Shenyang Pharmaceutical University; Shenyang P. R. China
| | - Xingxing Zhang
- Department of Pharmaceutical Analysis, School of Pharmacy; Shenyang Pharmaceutical University; Shenyang P. R. China
| | - Xiaochen Bai
- Department of Pharmaceutical Analysis, School of Pharmacy; Shenyang Pharmaceutical University; Shenyang P. R. China
| | - Xiaoting Li
- Department of Pharmaceutical Analysis, School of Pharmacy; Shenyang Pharmaceutical University; Shenyang P. R. China
| | - Qikun Jiang
- Wuya College of Innovation; Shenyang Pharmaceutical University; Shenyang P. R. China
| | - Tianhong Zhang
- Department of Pharmaceutical Analysis, School of Pharmacy; Shenyang Pharmaceutical University; Shenyang P. R. China
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15
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Zhou X, Guo X, Jian F, Wei G. Highly Efficient Method for Suzuki Reactions in Aqueous Media. ACS OMEGA 2018; 3:4418-4422. [PMID: 31458668 PMCID: PMC6641778 DOI: 10.1021/acsomega.8b00469] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 04/02/2018] [Indexed: 05/24/2023]
Abstract
Herein, we report the crystal structure and characterization of mono-6-(l-aminopropanol)-deoxy-β-cyclodextrin (L n @β-CD). A highly efficient, in situ generated catalyst, PdCl2(L n @β-CD), was synthesized for palladium-catalyzed cross-coupling reactions under mild reaction conditions, and the use of this catalyst in Suzuki cross-couplings was investigated. Low palladium loadings of 0.01 mol % PdCl2(L n @β-CD) (Pd accounted for approximately 8.4% of the catalyst by mass) were found to be highly efficient for Suzuki cross-couplings in water and afforded the corresponding biaryl compounds in excellent yields. The catalyst can be recycled and reused.
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Affiliation(s)
- Xinglong Zhou
- School
of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan 471003, P. R. China
| | - Xuming Guo
- School
of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan 471003, P. R. China
| | - Fangfang Jian
- School
of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan 471003, P. R. China
| | - Gang Wei
- CSIRO
Manufacturing, 36 Bradfield
Road, West Lindfield, P.O. Box 218, Lindfield, NSW 2070, Australia
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16
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Trnková A, Šancová K, Zapletalová M, Kašparovská J, Dadáková K, Křížová L, Lochman J, Hadrová S, Ihnatová I, Kašparovský T. Determination of in vitro isoflavone degradation in rumen fluid. J Dairy Sci 2018; 101:5134-5144. [PMID: 29550126 DOI: 10.3168/jds.2017-13610] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 01/26/2018] [Indexed: 11/19/2022]
Abstract
The aim of this study was to determine the degradation of dietary isoflavones in rumen fluid under 2 feeding regimens. The experiments were performed in vitro using a rumen fluid buffer system. The rumen fluid was taken from cows fed either a hay diet or a concentrate-rich diet (the diet consisted of 34.6% maize silage, 17.6% haylage, 12.8% alfalfa hay, and 35.0% supplemental mixture on a dry matter basis). As a source of isoflavones, 40% soybean extract (Biomedica, Prague, Czech Republic) at levels of 5, 25, 50, and 75 mg per 40 mL of rumen fluid was used. Samples of soybean extract were incubated in triplicate at 39°C for 0, 3.0, 6.0, 12.0, and 24.0 h in incubation solution. The metabolism of daidzein and genistein was faster under concentrate-rich diet conditions. In general, production of equol started after 3 to 6 h of incubation and reached the highest rate after approximately 12 h of incubation regardless of the type of diet or concentration of extract. In most of the experiments, production of equol continued after 24 h of incubation. Generally, equol production was greater under the hay diet conditions. Furthermore, experiments with higher amounts of added soybean extract revealed possible inhibitory effects of high levels of isoflavones on the rumen microflora.
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Affiliation(s)
- Andrea Trnková
- Department of Biochemistry, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic
| | - Kateřina Šancová
- Department of Biochemistry, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic
| | - Martina Zapletalová
- Department of Biochemistry, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic
| | - Jitka Kašparovská
- Department of Biochemistry, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic
| | - Kateřina Dadáková
- Department of Biochemistry, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic
| | - Ludmila Křížová
- Department of Biochemistry, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic
| | - Jan Lochman
- Department of Biochemistry, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic
| | - Sylvie Hadrová
- Department of Biochemistry, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic
| | - Ivana Ihnatová
- Research Centre for Toxic Compounds in the Environment, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic
| | - Tomáš Kašparovský
- Department of Biochemistry, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic.
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