Q star elite esi lc ms ms mass spectrometer

Manufactured by Thermo Fisher Scientific

The Q-STAR Elite ESI-LC-MS/MS is a mass spectrometer designed for liquid chromatography-tandem mass spectrometry (LC-MS/MS) applications. It utilizes an electrospray ionization (ESI) source to generate ions from liquid samples, which are then analyzed by a quadrupole-time-of-flight (Q-TOF) mass analyzer.

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Lab products found in correlation

Av 400 spectrometer, by Bruker (9 mentions) 1200 hplc msd mass spectrometer, by Thermo Fisher Scientific (3 mentions) Av 500 spectrometer, by Bruker (3 mentions) Diamonsil c18, by Dikma Technologies (2 mentions) Diamonsil c18 column, by Dikma Technologies (1 mentions) Agilent 1200 series uv detector, by Agilent Technologies (1 mentions) Av 300, by Bruker (1 mentions) Av 600 spectrometer, by Bruker (1 mentions) Asi 100 autoinjector, by Dikma Technologies (1 mentions)

10 protocols using q star elite esi lc ms ms mass spectrometer

Synthesis and Purification of Novel Compounds

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All reagents and solvents
were used as purchased from commercial sources without further purification.
Flash chromatography was performed using 300-mesh silica gel. All
reactions were monitored by TLC using silica-gel plates with fluorescence
F254 and UV-light visualization. ¹H NMR spectra were recorded
on a Bruker AV-400 spectrometer at 400 MHz or a Bruker AV-500 spectrometer
at 500 MHz. ¹³C NMR spectra were recorded on a Bruker AV-500
spectrometer at 125 MHz. Coupling constants (J) are
expressed in hertz (Hz). Chemical shifts (δ) of NMR are reported
in parts per million (ppm) relative to an internal standard (TMS).
Low- and high-resolution of ESI-MS was recorded on an Agilent 1200
HPLC-MSD mass spectrometer and an Applied Biosystems Q-STAR Elite
ESI-LC-MS/MS mass spectrometer, respectively. Purities of the final
compounds, 5a–5r, were determined
to be >95% by reverse-phase high-performance liquid chromatography
(HPLC, Dionex Summit HPLC; Diamonsil C18 column, 5.0 μm, 4.6
× 250 mm, Dikma Technologies; PDA-100 photodiode-array detector;
ASI-100 autoinjector; p-680A pump). A flow rate of 1.0 mL/min was
used with a mobile phase of 90% MeOH in H₂O with 0.1% modifier
(ammonia, v/v).

Wang Z., Zhang Y., Pinkas D.M., Fox A.E., Luo J., Huang H., Cui S., Xiang Q., Xu T., Xun Q., Zhu D., Tu Z., Ren X., Brekken R.A., Bullock A.N., Liang G., Ding K, & Lu X. (2018). Design, Synthesis, and Biological Evaluation of 3-(Imidazo[1,2-a]pyrazin-3-ylethynyl)-4-isopropyl-N-(3-((4-methylpiperazin-1-yl)methyl)-5-(trifluoromethyl)phenyl)benzamide as a Dual Inhibitor of Discoidin Domain Receptors 1 and 2. Journal of Medicinal Chemistry, 61(17), 7977-7990.

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Characterization of Organic Compounds by NMR and MS

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¹H and ¹³C NMR spectra (Supplementary Materials) were recorded on a Bruker AV-400 spectrometer at 400 and 100 MHz, respectively, in CDCl₃, CD₃OD, (CD₃)₂SO, and C₆D₆ as indicated. Coupling constants (J) are expressed in hertz (Hz). Chemical shifts (δ) of NMR are reported in parts per million (ppm) units relative to the solvent. The high resolution of ESI-MS was recorded on an Applied Biosystems Q-STAR Elite ESI-LC-MS/MS mass spectrometer, respectively. Unless otherwise noted, materials were obtained from commercial suppliers and used without further purification. Melting points were measured using an YRT-3 melting point apparatus (Shanghai Yice Apparatus & Equipment Co., Ltd., Shanghai, China) and were uncorrected.

Dey A., Chen R., Li F., Maitra S., Hernandez J.F., Zhou G.C, & Vincent B. (2021). Synthesis and Characterization of Andrographolide Derivatives as Regulators of βAPP Processing in Human Cells. Molecules, 26(24), 7660.

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Synthetic Protocols and Purification Techniques

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All reagents and solvents were used as purchased from commercial sources or indicated otherwise. Flash chromatography was performed using silica gel (300 mesh). All reactions were monitored by TLC, using silica gel plates with the fluorescence F₂₅₄ displayed by UV light visualization. ¹H NMR and ¹³C NMR spectra were recorded on a Bruker AV-400 spectrometer or Bruker AV-300. Coupling constants (J) are expressed in hertz (Hz). Chemical shifts (δ) of NMR are reported in parts per million (ppm) units relative to an internal control (TMS). Low resolution ESI-MS data were recorded on a Finnigan LCQ Advantage MAX mass spectrometer and high resolution ESI-MS data on an Applied Biosystems Q-STAR Elite ESI-LC-MS/MS mass spectrometer. The purity of the compounds was determined by reverse phase high performance liquid chromatography (HPLC) analysis to be >95%. HPLC was performed on either LC-100 liquid chromatograph equipped with a tunable LC-100 UV detector (Shanghai Wufeng Inc., China) or Agilent 1200 series liquid chromatograph equipped with an Agilent 1200 Series UV detector (Agilent Technologies, USA). The columns used were Cosmosil 5C18 (Nacalai Tesque Inc., Japan) for general purification. A flow rate of 1.0 mL/min was used with mobile phase of MeOH in H₂O with 0.1% modifier (ammonia or trifluoroacetate, v/v).

Zhang L., Li Y.F., Yuan S., Zhang S., Zheng H., Liu J., Sun P., Gu Y., Kurihara H., He R.R, & Chen H. (2016). Bioactivity Focus of α-Cyano-4-hydroxycinnamic acid (CHCA) Leads to Effective Multifunctional Aldose Reductase Inhibitors. Scientific Reports, 6, 24942.

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Characterization of Chemical Compounds

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¹H and ¹³C NMR spectra were recorded on a Bruker AV-400 spectrometer at 400 and 100 MHz, respectively, in CD₃Cl, CD₃OD, (CD₃)₂SO and C₆D₆ as indicated. Coupling constants (J) are expressed in hertz (Hz). Chemical shifts (δ) of NMR are reported in parts per million (ppm) units relative to the solvent. High resolution ESI-MS spectra were recorded on an Applied Biosystems Q-STAR Elite ESI-LC-MS/MS mass spectrometer. Unless otherwise noted, materials were obtained from commercial suppliers and were used without further purification. Melting points were measured using a YRT-3 melting point apparatus (Shanghai, China) and were uncorrected.

Li F., Li X.M., Sheng D., Chen S.R., Nie X., Liu Z., Wang D., Zhao Q., Wang Y., Wang Y, & Zhou G.C. (2018). Discovery and preliminary SAR of 14-aryloxy-andrographolide derivatives as antibacterial agents with immunosuppressant activity. RSC Advances, 8(17), 9440-9456.

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Purification and Characterization of Organic Compounds

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All reagents and solvents were used directly as purchased from commercial sources. Flash chromatography was performed using silica gel (200–300 mesh). All reactions were monitored by thin-layer chromatography (TLC), using silica gel plates with fluorescence F₂₅₄ and UV light visualization. ¹H NMR spectra were recorded on a Bruker AV-400 spectrometer at 400 MHz. Coupling constants (J) are expressed in hertz (Hz). Chemical shifts (δ) of NMR are reported in parts per million (ppm) units relative to an internal control (TMS). Low-resolution ESI–MS was recorded on an Agilent 1200 HPLC-MSD mass spectrometer and high-resolution ESI–MS on an Applied Biosystems Q-STAR Elite ESI–LC–MS/MS mass spectrometer. HPLC instrument, Dionex Summit HPLC (column: Diamonsil C18, 5.0 μM, 4.6 × 250 mm (Dikma Technologies); detector, PDA-100 photodiode array; injector, ASI-100 autoinjector; pump, p-680A). A flow rate of 0.5 ml/min was used with a mobile phase of ACN in H2O with a 0.1% modifier (TFA, v/v).

Li Y., Huang Y., Cheng H., Xu F., Qi R., Dai B., Yang Y., Tu Z., Peng L, & Zhang Z. (2022). Discovery of BRAF/HDAC Dual Inhibitors Suppressing Proliferation of Human Colorectal Cancer Cells. Frontiers in Chemistry, 10, 910353.

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Synthetic Organic Compound Characterization

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Reagents and solvents were obtained from commercial suppliers and used without further purification. Flash chromatography was performed using silica gel (300–400 mesh). All reactions were monitored by TLC, silica gel plates with fluorescence F254 were used and visualized with UV light. 1H and 13C NMR spectra were recorded on a Bruker AV-400 spectrometer at 400 MHz and Bruker AV-500 spectrometer at 125 MHz, respectively (Bruker, Billerica, MA). Coupling constants (J) are expressed in hertz (Hz). Chemical shifts (δ) of NMR are reported in parts per million (ppm) units relative to internal control (TMS). The low or high resolution of ESI-MS was recorded on an Agilent 1200 HPLC-MSD mass spectrometer (Santa Clara, CA) or Applied Biosystems Q-STAR Elite ESI-LC-MS/MS mass spectrometer (Foster City, CA), respectively.

Lu X., Zhang Z., Ren X., Wang D, & Ding K. (2017). Synthesis and identification of GZD856 as an orally bioavailable Bcr-AblT315I inhibitor overcoming acquired imatinib resistance. Journal of Enzyme Inhibition and Medicinal Chemistry, 32(1), 331-336.

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Analytical Method Development and Validation

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All commercially available
reagents and solvents were used without further purification. All
chemical reactions were monitored by thin-layer chromatography (TLC)
plates with visualization under UV light (254 or 365 nm). ¹H NMR spectra were performed with a Bruker AV-400/600 spectrometer, ¹³C NMR spectra were recorded on a Bruker AV-600 spectrometer
at 150 MHz, and internal reference was either TMS or a deuterated
NMR solvent. Low-resolution mass spectra (MS) were recorded on an
Agilent 1200 HPLC-MSD mass spectrometer. High-resolution mass spectral
analysis was recorded on an Applied Biosystems Q-STAR Elite ESI-LC-MS/MS
mass spectrometer. The purity of all final compounds was confirmed
to be >95% by HPLC analysis with the Agilent 1260 system. The analytical
columns were the YMC-Triart C18 reversed-phase column, 5 μm,
4.6 mm × 250 mm, and a flow rate of 1.0 mL/min.

Yang J., Chang Y., Tien J.C., Wang Z., Zhou Y., Zhang P., Huang W., Vo J., Apel I.J., Wang C., Zeng V.Z., Cheng Y., Li S., Wang G.X., Chinnaiyan A.M, & Ding K. (2022). Discovery of a Highly Potent and Selective Dual PROTAC Degrader of CDK12 and CDK13. Journal of Medicinal Chemistry, 65(16), 11066-11083.

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Purification and Characterization of Novel Compounds

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All reagents and solvents were used directly as purchased from commercial sources. Flash chromatography was performed using silica gel (200–300 mesh). All reactions were monitored by thin-layer chromatography (TLC), using silica gel plates with fluorescence F₂₅₄ and UV light visualization. ¹H NMR and ¹³C NMR spectra were recorded on a Bruker AV-400 spectrometer and Bruker AV-600 spectrometer. Coupling constants (J) are expressed in hertz (Hz). Chemical shifts (δ) of NMR are reported in parts per million (ppm) units relative to an internal control (TMS). Low resolution ESI-MS were recorded on an Agilent 1200 HPLC-MSD mass spectrometer and high resolution ESI-MS on an Applied Biosystems Q-STAR Elite ESI-LC-MS/MS mass spectrometer. HPLC instrument for purity analysis was as follows: Dionex Summit HPLC (column: AD-3, 5.0 μM, 4.6 mm × 250 mmL). A flow rate of 1.0 ml/min was used with a mobile phase of Isopropyl alcohol in Hexane.

Yang Y., Cao L., Yan M., Zhou J., Yang S., Xu T., Huang S., Li K., Zhou Q., Li G., Zhu Y., Cong F., Zhang H., Guo D., Li Y, & Zhang X. (2023). Synthesis of deuterated S-217622 (Ensitrelvir) with antiviral activity against coronaviruses including SARS-CoV-2. Antiviral Research, 213, 105586.

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Characterization of Organic Compounds

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Reagents and solvents were purchased
from commercial sources and used directedly. Flash chromatography
was performed using 300-mesh silica gel. Reactions were monitored
by thin-layer chromatography using silica gel plates with fluorescence
F₂₅₄ and UV light visualization. Low-resolution electrospray
ionization mass spectrometry (ESI-MS) was performed on an Agilent
1200 high-performance liquid chromatography (HPLC)-mass selective
detector mass spectrometer and high-resolution ESI-MS on an Applied
Biosystems Q-STAR Elite ESI-LC-MS/MS mass spectrometer. ¹H NMR spectra were performed on a Bruker AV-400 spectrometer at 400
MHz or a Bruker AV-500 spectrometer at 500 MHz. ¹³C NMR
spectra were performed on a Bruker AV-500 spectrometer at 125 MHz.
Coupling constants (J) were expressed in hertz (Hz).
Chemical shifts (δ) of NMR were reported in parts per million
units relative to an internal standard (tetramethylsilane). Purity
of the compounds was determined by reverse-phase high-performance
liquid chromatography (HPLC) analysis to be >95%. HPLC instrument:
Dionex Summit HPLC (column: Diamonsil C18, 5.0 μm, 4.6 ×
250 mm² (Dikma Technologies); detector: PDA-100 photodiode
array; injector: ASI-100 autoinjector; pump: p-680A). A flow rate
of 1.0 mL/min was used with mobile phase of MeOH in H₂O
with a 0.1% modifier (ammonia, v/v).

Zhu D., Huang H., Pinkas D.M., Luo J., Ganguly D., Fox A.E., Arner E., Xiang Q., Tu Z.C., Bullock A.N., Brekken R.A., Ding K, & Lu X. (2019). 2-Amino-2,3-dihydro-1H-indene-5-carboxamide-Based Discoidin Domain Receptor 1 (DDR1) Inhibitors: Design, Synthesis, and in Vivo Antipancreatic Cancer Efficacy. Journal of Medicinal Chemistry, 62(16), 7431-7444.

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NMR and Mass Spectrometry Characterization

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¹H and ¹³C NMR spectra were recorded on a Bruker AV-400 spectrometer at 400 and 100 MHz, respectively, in CDCl₃, CD₃OD, (CD₃)₂SO and C₆D₆ as indicated. Coupling constants (J) are expressed in hertz (Hz). Chemical shifts (δ) of NMR are reported in parts per million (ppm) units relative to the solvent. The high resolution of ESI-MS was recorded on an Applied Biosystems Q-STAR Elite ESI-LC-MS/MS mass spectrometer, respectively. Unless otherwise noted, materials were obtained from commercial suppliers and used without further purification. Anhydrous tetrahydrofuran (THF) was distilled from sodium-treated THF under nitrogen atmosphere and anhydrous dichloromethane (DCM) was distilled from calcium hydride-treated DCM under nitrogen atmosphere. Melting points were measured using an YRT-3 melting point apparatus (Shanghai, China) and were uncorrected. HPLC analysis condition: Sunfire C18 column (4.6 × 250 mm, 5 μm), elution by 90% methanol with 10% purified water (for compounds of 2, 3, 5, 8, 11a, 11b, 14a, 14b, 15a, 15b, 18a, 18b) or 80% methanol with 20% purified water (for compounds of 4, 6, 7, 9, 12a, 12b, 13a, 13b, 16a, 16b, 17a, 17b), rate = 1.0 ml/min, detection wavelength of 230 nm. The purity of all compounds by HPLC analysis is not lower than 95% (Supplementary data).

Li F., Lee E.M., Sun X., Wang D., Tang H, & Zhou G.C. (2019). Design, Synthesis and Discovery of andrographolide derivatives against Zika virus infection. European journal of medicinal chemistry, 187, 111925.

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