Background: The synthesis of novel heterocyclic derivatives has attracted considerable attention. The explosive growth of heterocyclic chemistry is emphasized by the large number of research publications, monographs, and reviews. The heterocyclic organic compounds are extensively disseminated in natural and synthetic medicinal chemistry and are vital for human life. Looking at the previous studies on quinazolinones derivatives, only limited informationis available on their mass spectral along with the preparation of novel quinazolin-4-(3H)-one derivatives. Objective: Objective of this study, was to synthesize a novel 2-Methyl-6, 7-dimethoxy-quinazolin-4-one was synthesized via the reaction between 2-Methyl-6, 7-dimethoxy-benzo-1,3-oxazin-4-one andhydrazine hydrate and study their electron impact ( EI ) mass spectral fragmentation. Method: The condensation of 2-amino-methyl-4, 5-dimethoxybenzoate with acetic anhydride yielded the cyclic compound 2-methyl-4, 5-disubstituted-1, 3-benzo-oxazine-4-one which further produce a novel 2,3-disubstituted quinazolin-4 ones via the reaction with hydrazine hydrate. The compounds synthesized were unequivocally confirmed by means of Infrared, Nuclear Magnetic Resonance (1H and 13C), Gas Chromatography Mass Spectrophotometer and Elemental analysis. Discussion: The molecular ion of m/z 235 fragment 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 CH2 group and fragment to m/z 177 by loss of HCO. This fragmented to m/z 162 by loss of –CH3 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 2show a weakmolecular ion peak and a base peak ofm/z 235resulting 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.
Published in | American Journal of Materials Synthesis and Processing (Volume 4, Issue 2) |
DOI | 10.11648/j.ajmsp.20190402.12 |
Page(s) | 62-67 |
Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
Copyright |
Copyright © The Author(s), 2019. Published by Science Publishing Group |
Mass Spectroscopy, Synthesis, Quinazoline-4-One, 2-Methyl 6, 7-Disubtituted 1, 3-Benzo-Oxazine-4-One, Nucleophile, Electron Impact Ionization Mass Spectra
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APA Style
Osarumwense Peter Osarodion, Edema Mary Orile, UsifohCyril Odianosen. (2019). Electron Impact Ionization Mass Spectra of 3-Amino 5,6-Dimethoxyl-2-Methyl Quinazolin-4-(3H)-One Derivative. American Journal of Materials Synthesis and Processing, 4(2), 62-67. https://doi.org/10.11648/j.ajmsp.20190402.12
ACS Style
Osarumwense Peter Osarodion; Edema Mary Orile; UsifohCyril Odianosen. Electron Impact Ionization Mass Spectra of 3-Amino 5,6-Dimethoxyl-2-Methyl Quinazolin-4-(3H)-One Derivative. Am. J. Mater. Synth. Process. 2019, 4(2), 62-67. doi: 10.11648/j.ajmsp.20190402.12
AMA Style
Osarumwense Peter Osarodion, Edema Mary Orile, UsifohCyril Odianosen. Electron Impact Ionization Mass Spectra of 3-Amino 5,6-Dimethoxyl-2-Methyl Quinazolin-4-(3H)-One Derivative. Am J Mater Synth Process. 2019;4(2):62-67. doi: 10.11648/j.ajmsp.20190402.12
@article{10.11648/j.ajmsp.20190402.12, author = {Osarumwense Peter Osarodion and Edema Mary Orile and UsifohCyril Odianosen}, title = {Electron Impact Ionization Mass Spectra of 3-Amino 5,6-Dimethoxyl-2-Methyl Quinazolin-4-(3H)-One Derivative}, journal = {American Journal of Materials Synthesis and Processing}, volume = {4}, number = {2}, pages = {62-67}, doi = {10.11648/j.ajmsp.20190402.12}, url = {https://doi.org/10.11648/j.ajmsp.20190402.12}, eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajmsp.20190402.12}, abstract = {Background: The synthesis of novel heterocyclic derivatives has attracted considerable attention. The explosive growth of heterocyclic chemistry is emphasized by the large number of research publications, monographs, and reviews. The heterocyclic organic compounds are extensively disseminated in natural and synthetic medicinal chemistry and are vital for human life. Looking at the previous studies on quinazolinones derivatives, only limited informationis available on their mass spectral along with the preparation of novel quinazolin-4-(3H)-one derivatives. Objective: Objective of this study, was to synthesize a novel 2-Methyl-6, 7-dimethoxy-quinazolin-4-one was synthesized via the reaction between 2-Methyl-6, 7-dimethoxy-benzo-1,3-oxazin-4-one andhydrazine hydrate and study their electron impact ( EI ) mass spectral fragmentation. Method: The condensation of 2-amino-methyl-4, 5-dimethoxybenzoate with acetic anhydride yielded the cyclic compound 2-methyl-4, 5-disubstituted-1, 3-benzo-oxazine-4-one which further produce a novel 2,3-disubstituted quinazolin-4 ones via the reaction with hydrazine hydrate. The compounds synthesized were unequivocally confirmed by means of Infrared, Nuclear Magnetic Resonance (1H and 13C), Gas Chromatography Mass Spectrophotometer and Elemental analysis. Discussion: The molecular ion of m/z 235 fragment 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 CH2 group and fragment to m/z 177 by loss of HCO. This fragmented to m/z 162 by loss of –CH3 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 2show a weakmolecular ion peak and a base peak ofm/z 235resulting 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.}, year = {2019} }
TY - JOUR T1 - Electron Impact Ionization Mass Spectra of 3-Amino 5,6-Dimethoxyl-2-Methyl Quinazolin-4-(3H)-One Derivative AU - Osarumwense Peter Osarodion AU - Edema Mary Orile AU - UsifohCyril Odianosen Y1 - 2019/08/07 PY - 2019 N1 - https://doi.org/10.11648/j.ajmsp.20190402.12 DO - 10.11648/j.ajmsp.20190402.12 T2 - American Journal of Materials Synthesis and Processing JF - American Journal of Materials Synthesis and Processing JO - American Journal of Materials Synthesis and Processing SP - 62 EP - 67 PB - Science Publishing Group SN - 2575-1530 UR - https://doi.org/10.11648/j.ajmsp.20190402.12 AB - Background: The synthesis of novel heterocyclic derivatives has attracted considerable attention. The explosive growth of heterocyclic chemistry is emphasized by the large number of research publications, monographs, and reviews. The heterocyclic organic compounds are extensively disseminated in natural and synthetic medicinal chemistry and are vital for human life. Looking at the previous studies on quinazolinones derivatives, only limited informationis available on their mass spectral along with the preparation of novel quinazolin-4-(3H)-one derivatives. Objective: Objective of this study, was to synthesize a novel 2-Methyl-6, 7-dimethoxy-quinazolin-4-one was synthesized via the reaction between 2-Methyl-6, 7-dimethoxy-benzo-1,3-oxazin-4-one andhydrazine hydrate and study their electron impact ( EI ) mass spectral fragmentation. Method: The condensation of 2-amino-methyl-4, 5-dimethoxybenzoate with acetic anhydride yielded the cyclic compound 2-methyl-4, 5-disubstituted-1, 3-benzo-oxazine-4-one which further produce a novel 2,3-disubstituted quinazolin-4 ones via the reaction with hydrazine hydrate. The compounds synthesized were unequivocally confirmed by means of Infrared, Nuclear Magnetic Resonance (1H and 13C), Gas Chromatography Mass Spectrophotometer and Elemental analysis. Discussion: The molecular ion of m/z 235 fragment 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 CH2 group and fragment to m/z 177 by loss of HCO. This fragmented to m/z 162 by loss of –CH3 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 2show a weakmolecular ion peak and a base peak ofm/z 235resulting 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. VL - 4 IS - 2 ER -