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2 protocols using g6230 tof spectrometer

1

Characterization of Organic Compounds

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Opitical rotations were measured on an Autopol VI (Serial #91058) manufactured by Rudolph Research Analytical, Hackettstown, NJ, USA. UV spectra were recorded by a Shimadzu UV-2401PC spectrometer. CD spectra were recorded using a JASCO J-810 spectropolarimeter. NMR spectra were recorded on Bruker Avance III 600 spectrometers. Electrospray ionization (ESI)-high-resolution mass spectrometry (HRMS) were recorded on an Agilent G6230 TOF spectrometer. Single crystal X-ray crystallography was determined on SMART APEX II DUO X-ray single crystal diffractometer using Cu Kα radiation. Preparative HPLC was performed on a Waters 2489 series instrument with a UV/Visible detector, using a reversed-phase C18 column (Phenomenex, 250 mm × 21.2 mm, 5 μm). Chiral HPLC was carried out on an Agilent 1260 liquid chromatograph, utilizing chiral analytical columns [(R, R) WHELK-01 column, 4.6 mm × 250 mm, 10 μm, 100 A].
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2

Spectroscopic Analysis of Organic Compounds

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Optical rotations were recorded on a Horiba SEPA-300 polarimeter. UV spectra were acquired on a Shimadzu UV-2401A instrument. IR spectra were collected on Bruker Tensor 27 FTIR spectrometers with KBr pellets. NMR spectra were recorded on Bruker Avance III-600 spectrometers with tetramethylsilane as an internal standard at room temperature. HRTOF-ESIMS were recorded on an Agilent G6230 TOF spectrometer. TLC was performed on precoated TLC plates (200-250 µm thickness, silica gel 60 F 254 , Qingdao Marine Chemical Inc.), and the spots were visualized by heating after spraying with 10 % aqueous H 2 SO 4 . Semi-preparative HPLC was performed on an Agilent 1100 liquid chromatograph with a Zorbax SB-C18 (5 µm, 9.4 mm × 250 mm, 3 mL/min) column.
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