Views: 0 Author: Site Editor Publish Time: 2022-11-11 Origin: Site
Methyl 2 - methyl - 2,3 - epoxy - 3 - [(3,4 - methylenedioxy)phenyl]propanoate is an intermediate in organic synthesis, which can be used in the synthesis of perfumes, as an organic synthesis Intermediates and pharmaceutical intermediates, mainly used in laboratory organic synthesis processes and chemical and pharmaceutical research and development processes.
What are the physical properties of PMK Glycidate powder CAS: 28578-16-7?
How is the qualitative test for PMK Glycidate powder CAS: 28578-16-7 performed?
How to analyze the qualitative test results of PMK Glycidate powder CAS: 28578-16-7?
Density 1.3±0.1 g/cm3
Boiling point 327.8±42.0 °C at 760 mmHg
Molecular formula C13H14O5
Molecular weight 250.247
Flash point 143.0±27.9 °C
Exact mass 250.084122
Vapor Pressure 0.0±0.7 mmHg at 25°C
Refractive index 1.554
Take the target sample for analysis, grind it fully, weigh 100 mg, put it in a 15 mL centrifuge tube, add 10 mL of methanol, shake for 10 min, centrifuge at 5 000 r/min for 5 min, and aspirate 1.5 mL of supernatant for GC/MS analysis. Weigh an appropriate amount of the target sample for analysis and prepare a solution of about 30 mg/mL in DMSO-d6 for NMR analysis.
DB-5MS quartz capillary column (0.25 mm×30 m, 0.25 μm); the column temperature program was initially 60 °C, increased to 300 °C at 15 °C/min, and held for 15 min; the inlet temperature was 280 °C; helium ( He) as carrier gas, flow rate 1.0 mL/min, split injection, split ratio 20:1; injection volume 1.0 μL; electron impact (EI) ion source; electron energy 70 eV; transmission line temperature 280; ion source temperature 230; quadrupole temperature 150; mass scan range m/z 40~500 amu; threshold 50; total ion chromatograms were collected in full scan mode (SCAN) with a solvent delay of 3.0 min.
DMSO-d6 was used to lock the field, and the test temperature was 300 K. The pulse sequences of hydrogen and carbon spectra were ZG30 and ZGPG30. The acquisition parameters and processing parameters used the default values of the instrument, and the chemical shifts were calibrated with TMS.
The total ion chromatogram of the target sample extract and the corresponding mass spectrum of the chromatographic peak with a retention time of 11.59 min. Under the set analysis conditions, analyze the main characteristic ion peaks of the GC/MS mass spectral fragments corresponding to the chromatographic peak with the retention time of 11.59 min in the target sample
For: m/z76.1, 91.1, 104.1, 134.1, 149.1, 165.1, 177.1,
236.1. The mass spectrum was queried and compared in the WGDRUG (Scientific Working Group for the Analysis of Seized Drugs) spectral library, and PMK methyl glycidate (Methyl 3-[3',4'-(methyl enedioxy)phenyl]-2- methyl glycidate).
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