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- W3136362385 abstract "Background: Looking at the previous studies on quinazolinones derivatives, only limited information’sare available on their massspectral along with the preparation of novel quinazolin-4-(3H)-one derivatives. Consolidation of Methyl-2-amino-4-Chlorobenzoate with acetic anhydride produced the cyclic compound 2-methyl 7-Chloro-1, 3-benzo-oxazine-4-one (1) which then produced 3-Amino-2-Methyl 7-Chloro quinazolin-4(3H)-ones (2) through the reaction with hydrazine hydrate. These compounds synthesized were indisputably confirmed by means of Infrared, Nuclear Magnetic Resonance (<sup>1</sup>H and <sup>13</sup>C), Gas Chromatography-Mass spectrophotometry and Elemental analysis. Discussion: The molecular ion of m/z 235 fragments to give m/z 220 by loss of –NH group. The ion of m/z 220 was broken to give m/z 206 by losing CH<sub>2</sub> group and fragment to m/z 177 by loss of HCO. This fragmented to m/z 162 by loss of –CH<sub>3</sub> group and then m/z 136 by loss of CN group. The loss of O gave m/z 120 which fragment to give m/z 93 by loss of –HCN and finally gave m/z 65 by loss of CO group. Conclusion: The electron impact ionization mass spectra of compound 2 show a weak molecular ion peak and a base peak of m/z 235 resulting from a cleavage fragmentation. Compound 2 give a characteristic fragmentation pattern. From the study of the mass spectra of compound 2, it was found that the molecular ion had fragmented to the m/z 220. The final fragmentation led to ion of m/z 93 and ion of mass m/z 65, respectively." @default.
- W3136362385 created "2021-03-29" @default.
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- W3136362385 date "2021-01-01" @default.
- W3136362385 modified "2023-09-26" @default.
- W3136362385 title "Electron Impact Ionization Mass Spectra of 3-Amino 6-Chloro-2-methyl Quinazolin-4-(3H)-one Derivative" @default.
- W3136362385 doi "https://doi.org/10.11648/j.ajmsp.20210601.13" @default.
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