Journal of the Mass Spectrometry Society of Japan
Online ISSN : 1880-4225
Print ISSN : 1340-8097
ISSN-L : 1340-8097
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Volume 15, Issue 3-4
Displaying 1-9 of 9 articles from this issue
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  • Element Map System and High Resolution Mass Spectra of Nucleosides
    S. TSUNAKAWA
    1967 Volume 15 Issue 3-4 Pages 143-156
    Published: December 31, 1967
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.5702/massspec1953.15.143
    JOURNAL FREE ACCESS
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  • Thermal Decomposition of Hexamethylene Tetramine
    YOSITOMO IWAKAMI, MASAO TAKAZONO, TOSHIKAZU TSUCHIYA
    1967 Volume 15 Issue 3-4 Pages 157-161
    Published: December 31, 1967
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.15.157
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • Mass Spectra of Sesquiterpenes
    YOSHIO HIROSE
    1967 Volume 15 Issue 3-4 Pages 162-178
    Published: December 31, 1967
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.15.162
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    Comprehensive discussions have been presented on general aspects of mass pattern of sesquiterpene hydrocarbons, saturated hydrocarbons, and sesquiterpene alcohols, together with their principal degradation mechanisms. Two ion species, m/e 124 and 82, were particularly remarked among those generated from saturated hydrocarbons. A hypothetical rule has been postulated as to the appearance of m/e 82 ion species and the mechanism of its formation. An application of it to a structural problem suggests its utility. Throughout the hydrocarbons, cracking pattern nodes are often formed at C12, C9, and C7 ion groups, due to the presence of “free” or “latent” isopropyl, isohexyl, and 2, 6-dimethyl-hexyl chains, respectively. Plausible interpretations were achieved with many unsaturated sesqui-terpenes by taking allylic fission, fission involving rearrangement particularly into conjugation with a double bond, retro Diels-Alder cracking, as well as movility of double bond and inclination to complete an aromatic ring system, into account. Several important supports to the interpretation of special ion species from sesquiterpene hydrocarbons have been obtained from the informations of the corresponding oxygenated compounds, or, vice versa. The tables of cracking pattern characteristic are attached of 39 saturated and 48 unsaturated sesquiterpene hydrocarbons.
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  • Detection of Meta-Stable Peaks by Mattauch-Herzog Mass Spectrometer
    S. SASAKI, E. YAMAUCHI, Y. ITAGAKI, M. NAITO, E. WATANABE
    1967 Volume 15 Issue 3-4 Pages 179-183
    Published: December 31, 1967
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.5702/massspec1953.15.179
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    Daughter ions from metastable ions were detected on photo plate in Mattauch-Herzog geometry by the gradual shift of accelerating voltage. By this technique the most possible fragmentations of 3, 4-epoxymenthane, l-menthone and piperitol were presented.
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  • The High-Resolution Mass Spectrum of Kojic Acid
    HISAO NAKATA, AKIRA TATEMATSU
    1967 Volume 15 Issue 3-4 Pages 184-187
    Published: December 31, 1967
    Released on J-STAGE: July 05, 2011
    DOIhttps://doi.org/10.5702/massspec1953.15.184
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    [in Japanese]
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  • Mass Spectra of The Metabolites of Monascus
    MAMORU OHASHI, AKIRA TATEMATSU
    1967 Volume 15 Issue 3-4 Pages 188-197
    Published: December 31, 1967
    Released on J-STAGE: July 05, 2011
    DOIhttps://doi.org/10.5702/massspec1953.15.188
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    Mass spectra have been measured for the metabolites of Monascus purpuleus Wentii and correlations between spectra and structure have been made. The fragmentation processes of monascorubrin (1) which belongs to the group of azaphilones and of which structure was elucidated as a unique extended pyrone, are interpreted largely through the use of meta-stable ions (Table 1). The results (Scheme 2) indicate that a loss of an alkyl side chain with a McLafferty rearrangement on the carbonyl oxygen gives rise to the most abundant ion(M.+-C6H12)from which major fragment ions originate. Thus coexistence of rubropunctatin (III) which differs from monascorubrin only by one alkyl chain length does not affect the interpretation of the spectrum.
    Attention is drawn to the dramatic change of the mass spectral behavior of monascamine (II) which was prepared by a simple conversion of the pyronoid oxygen atom of monascorubrin into-NH-. In case of II a loss of an entire alkyl side chain including the carbonyl group with a hydrogen rearrangement on the unsaturated system affords the most abundant ion(M.+-C8H10O). The difference of the mass spectral behavior between monascorubrin and monascamine may be accounted for from the concept of localization of radical ion which is thought to be the driving force of McLafferty rearrangement. The mass spectra of the isoquinoline derivatives such as monascaminone (VIII), monascaminol (IX) and the others are also discussed in terms of the fragmentation of isoqui noline group.
    Application of the mass spectral studies on piperitone (XI) and an octalone (XII) to the interpretation of the spectrum of monascoflavine (Monascine) enables one to deduce the correct structure (IVa) of monascoflavine to which two alternative structures (IVa and IVb) have been proposed. The presence of a series of peaks; M+.m*→m/e162 m*→m/e134, is consitstent only with the case of piperitone's reflecting the presence of the same partial structure in the two compounds.
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  • Analysis of Mixed Drugs by Mass Spectrometry, VIII.
    AKIRA TATEMATSU, HIDEO YOSIZUMI, TOSHIO GOTO
    1967 Volume 15 Issue 3-4 Pages 198-203
    Published: December 31, 1967
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.15.198
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    Although in previous paper, we reported that mass spectrum of sulpyrine(I), sodium methan sulfonate of monomethylaminoantipyrine(III), is diffcult to measure due to its non-volatility.
    It was found that reproducible mass spectrum of thermal degraduation products of sulpyrine was obtained by raising temperature of ionization chamber and of heated inlet-system to about 250°.
    The identification of sulpyrine in the various preparations, (powder, granule, tablet, and injection etc.) containing sulpyrine by examination of their mass spectra is thus possible.
    By comparison of mass spectra of 4 kinds of pyrazolone derivatives, fragmentation of sulpyrine was also discussed.
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  • Mass Spectrometric Studies of Methylenedioxybenzene Derivatives
    S. SASAKI, H. ABE, Y. ITAGAKI, M. ARAI
    1967 Volume 15 Issue 3-4 Pages 204-214
    Published: December 31, 1967
    Released on J-STAGE: July 05, 2011
    DOIhttps://doi.org/10.5702/massspec1953.15.204
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    The mass spectral fragmentations of methylenedioxybenzene derivatives are described. It has been reported that the methylenedioxy moiety of buphanasine, a member of Amaryllidaceae alkaloids, loses a molecule of formaldehyde by electron impact. However no detailed investigation of the mass spectral behaviors of methylenedioxy group has been carried out.In this paper the fragmentations of methylenedioxybenzene derivatives are discussed.
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  • [title in Japanese]
    [in Japanese]
    1967 Volume 15 Issue 3-4 Pages 220-222
    Published: December 31, 1967
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.15.220
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