巻号一覧
15 巻 (1967)
- 3-4 号 p. 143-
- 2 号 p. 67-
- 1 号 p. 1-
15 巻, 3-4 号
選択された号の論文の9件中1～9を表示しています
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綱川 資成1967 年 15 巻 3-4 号 p. 143-156
発行日: 1967/12/31
公開日: 2011/03/01
ジャーナル フリーPDF形式でダウンロード (1411K) -
岩上 好智, 高園 正男, 土屋 利一1967 年 15 巻 3-4 号 p. 157-161
発行日: 1967/12/31
公開日: 2010/06/28
ジャーナル フリーIn order to get information about the mechanism of thermal decomposition of hexamethylene tetramine(hexa), hexa was decomposed thermally in a vacuum vessel, and the composition of the gas produced was determined with a mass spectrometer. The main products found were ammonia and a carbon rich solid residue. The carbon in the carbon rich residue seems to act as a catalyst for the decomposition.抄録全体を表示PDF形式でダウンロード (476K) -
広瀬 善雄1967 年 15 巻 3-4 号 p. 162-178
発行日: 1967/12/31
公開日: 2010/06/28
ジャーナル フリー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.抄録全体を表示PDF形式でダウンロード (1282K) -
S. SASAKI, E. YAMAUCHI, Y. ITAGAKI, M. NAITO, E. WATANABE1967 年 15 巻 3-4 号 p. 179-183
発行日: 1967/12/31
公開日: 2011/03/01
ジャーナル フリー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.抄録全体を表示PDF形式でダウンロード (326K) -
中田 尚男, 立松 晃1967 年 15 巻 3-4 号 p. 184-187
発行日: 1967/12/31
公開日: 2011/07/05
ジャーナル フリーThe mass spectral fragmentation patterns of kojic acid(I)were examined with the aid of highresolution mass spectrometry. The conventional spectrum of I is shown in Fig. 1, and elemental compositions of each fragment ion are established by accurate mass measurement(Table I).
The appearance of appropriate meta-stable ion peaks suggests one of major fragmentation pathways as shown in Fig. 2. The fragment ions and fragmentation sequences are repre sented in Fig. 3.
The first step of the fragmentation is, as in benzyl alcohol, the loss of CHO radical from CH2OH side chain to give an oxonium ion B, which would undergo ring opening to B′. Expulsion of carbon monoxide fron B′ ylelds an ion C, and subsequent hydrogen migration and ring closure may afford an oxetane ion C′. The further loss of carbon monoxide would give an ion D, which then afford ethylene and an ion E. If the prototropic rearrangement is possible in B′, an alternative route to D is also conceivable(Fig. 4).
Expulsion of carbon monoxide fromthe molecular ion and loss of OH from its side chain gives ion F or F′. Retro-Diels-Alder cleavage of γ-pyrone ring followed by loss of CH20H group may account for an ion at m/e 69(G). Deuteriation experiments support the structure of G. Although the origin of an ion at m/e 39 is yet unknown, its structure may probably be formulated as H.抄録全体を表示PDF形式でダウンロード (319K) -
大橋 守, 立松 晃1967 年 15 巻 3-4 号 p. 188-197
発行日: 1967/12/31
公開日: 2011/07/05
ジャーナル フリー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.抄録全体を表示PDF形式でダウンロード (645K) -
解熟鎮痛剤その3.スルピリン製剤について立松 晃, 吉住 秀夫, 後藤 俊夫1967 年 15 巻 3-4 号 p. 198-203
発行日: 1967/12/31
公開日: 2010/06/28
ジャーナル フリー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.抄録全体を表示PDF形式でダウンロード (447K) -
S. SASAKI, H. ABE, Y. ITAGAKI, M. ARAI1967 年 15 巻 3-4 号 p. 204-214
発行日: 1967/12/31
公開日: 2011/07/05
ジャーナル フリー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.抄録全体を表示PDF形式でダウンロード (536K) -
緒方 惟一1967 年 15 巻 3-4 号 p. 220-222
発行日: 1967/12/31
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (375K)
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