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Volume 16, Issue 7
Displaying 1-43 of 43 articles from this issue
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SATOSHI OMURA, MICHIKO KATAGIRI, HARUO OGURA, TOJU HATA1968 Volume 16 Issue 7 Pages 1167-1173
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSIt was previously reported that leucomycin A3 is a macrolide antibiotic and composed of a lactone containing an aldehyde, O-acetyl, and O-methyl groups, mycaminose, and 4-O-isovaleryl mycarose. The present paper is concerned with the position of the aldehyde group and linkage of the two sugars, and it was found that mycaminose is linked with the aldehyde group at the γ-position through a β-glycosidic linkage, and isovalerylmycarose is linked with mycaminose at the 4-position through an α-glycosidic linkage.View full abstractDownload PDF (702K) -
AKIKO IKEKAWA, NOBUYOSHI KANENIWA1968 Volume 16 Issue 7 Pages 1174-1180
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSFifteen kinds of pharmaceutical powders are tapped in air and in solvents, and the following equation is proposed for the tapping of these samples. [numerical formula] Coefficients p, q and r are related to the apparent friction, that is, internal friction and cohesive force between particles of powders.View full abstractDownload PDF (613K) -
SATOSHI OMURA, MICHIKO KATAGIRI, HARUO OGURA, TOJU HATA1968 Volume 16 Issue 7 Pages 1181-1186
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSLeucomycin A3 (I) was oxidized with active manganese dioxide to dehydroleucomycin A3 (II) which was identical with magnamycin B. Acid treatment of I yielded demycarosylleucomycin A3 (VII), which was converted to a triacetate showing mass spectrum M+ (m/e 725), and this observation confirmed the structure of I. The diene system of I was assumed to have a trans-trans configuration on the basis of its NMR spectrum, and a full structure of I was proposed with stereochemistry.View full abstractDownload PDF (626K) -
YOSHIO SASAKI, MIYOKO SUZUKI1968 Volume 16 Issue 7 Pages 1187-1192
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSThe revised substituent shielding parameter has been proposed in ortho and meta 1H shift for estimating the π-electron charge densities in substituted benzene series, and, also the resonance contribution has been proved to be a dominant factor in determining the meta 1H shift. The π-electron charge density calculated from simple sum rule of the revised shielding parameter showed passable agreement with those from HMO treatment.View full abstractDownload PDF (591K) -
MIYOKO SUZUKI1968 Volume 16 Issue 7 Pages 1193-1199
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSThe 1H magnetic resonance spectra in 1-substituted-3, 4-dimethoxybenzene series were examined in the following items. i) simple sum rule in the chemical shift estimation. ii) simple sum rule in the π-electron charge density estimation. iii) revised ring 1H chemical shift and π-electron charge density correlation. iv) OCH3 chemical shift and σπ value of substituent R. v) coupling constant and electronegativity of substituent group.View full abstractDownload PDF (588K) -
HIDEHIKO KANEKO, YUZURU YAMATO, MIKIO KUROKAWA1968 Volume 16 Issue 7 Pages 1200-1209
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSSteroids with a thiophene ring fused to the 2, 3 positions were synthesized. Condensation of 2-methoxymethylene-3-ketosteroids (Ia, Ib) with ethyl thioglycolate in the presence of sodium methoxide yielded the tetrahydrothiophene derivatives (Va, Vb), which were dehydrated to the corresponding androstano [2, 3-c] thiophene carboxylates (VIa, VIb) by treatment of acids. Hydrolysis, followed by decarboxylation of the carbethoxythiophenes gave the corresponding androstano [2, 3-c] thiophenes (Xa, Xb). Similarly androst-4-eno [2, 3-c] thiophenes and androstanc [16, 17-c] thiophenes were prepared.View full abstractDownload PDF (1082K) -
AKIRA TAKAMIZAWA, KENTARO HIRAI, YOSHIO HAMASHIMA, SAICHI MATSUMOTO, T ...1968 Volume 16 Issue 7 Pages 1210-1220
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSReaction of thiamine-sodium salt (IV) with benzaldehyde in the presence of carbon dioxide afforded 2-benzoyl-3-(2-methyl-4-aminopyrimidin-5-yl-methyl)-3a-methylperhydrofuro [2, 3-d] thiazole (Va) involving an unusual carbon-acylation at thiazole C-2 position of thiamine, and stereochemistry of the product was discussed. Va was also obtained from reaction of thiamine hydrochloride (I) with benzaldehyde in the presence of triethylamine under anhydrous condition. Some other aldehydes also reacted to furnish corresponding C-2 acylated thiamine derivatives.View full abstractDownload PDF (1031K) -
MITSUJI YANAI, TOSHIO KINOSHITA1968 Volume 16 Issue 7 Pages 1221-1227
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSReaction of 3, 6-dimethoxy-4-nitropyridazine 1-oxide (I) with alkyl halides were investigated, and following results were obtained. 1) Reaction with methyl iodide gave 1, 3, 4-trimethoxy-6 (1H) pyridazinone (II). 2) Reaction with ethyl iodide gave 1, 4-diethoxy-3-methoxy-6 (1H) pyridazinone (IV). 3) Reaction with ethyl chlorocarbonate gave 1-ethoxycarbonyloxy-3-methoxy-4-chloro-(VI) and 1, 4-bisethoxycarbonyloxy-3-methoxy-6 (1H) pyridazinone (VII). 4) Reaction with ethyl bromoacetate gave 1, 4-bisethoxycarbonylmethoxy-3-methoxy-6 (1H) pyridazinone (IX). Moreover the reaction of 4-nitropyridazine 1-oxide derivatives with methyl iodide was described. 1) Reaction with 3-methoxy-4-nitro-6-methylpyridazine 1-oxide (XIII) gave 3, 4-dimethoxy-6-cyanopyridazine 1-oxide (XV) and 1-methyl-3-methoxy-6-cyano-4 (1H) pyridazinone (XVI). 2) Reaction with 6-methoxy-4-nitropyridazine 1-oxide (XIV) gave 1, 4-dimethoxy-6 (1H) pyridazinone (XX).View full abstractDownload PDF (781K) -
MICHIYA KIMURA, MASAHIKO TOHMA, ITSUO YOSHIZAWA1968 Volume 16 Issue 7 Pages 1228-1234
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSThe structure of the steroidal saponin, convallasaponin-D, 3)C50H82O21, mp 264-265°, [a]21D : -66°, which was isolated from the flowers of Convallaria keisukei MIQ., Japanese lily of the valley, was studied and elucidated as rhodeasapogenin (1)-β-D-glucopyranosido, (3)-α-L-rhamnopyranosyl (1rha→2xyl)-β-D-xylopyranosyl (1xyl→3rha)-α-L-rhamnopyranoside.View full abstractDownload PDF (790K) -
SHIGEKO OZAKI1968 Volume 16 Issue 7 Pages 1235-1239
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSThe ultraviolet absorption spectra of para-disubstituted benzene series with two substituent groups of opposite electrical property are measured in n-heptane, ethanol and water. The transition energies of three bands, namely shifted one of 200 mμ band (A1g→B1U transition), intramolecular chargetransfer band and 250 mμ band (A1g→B2U transition) are discussed with respect to substituent constants and molecular dipole moment. The results are as follows : (1) The chargetransfer band is more sensitive than other band to the character of substituent groups, polarity of solvent and molecular dipole moment. (2) The sum of para-substituent constants, |σp1|+|σp2| and molecular dipole moment correlate well with the absorption maxima of this series.View full abstractDownload PDF (512K) -
MORIO SETAKA, SOGO FUKUZAWA, YUTAKA KIRINO, TAKAO KWAN1968 Volume 16 Issue 7 Pages 1240-1243
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSThe paper describes an electron spin resonance (ESR) study on the interaction of oxygen with ZnO, TiO2 and ZrO2 during photoirradiation. Photoadsorption and photodesorption of oxygen were investigated on these oxides with simultaneous measurements of the ESR spectra due to adsorbed oxygen and of the residual oxygen pressure. Significance of the role of neutral oxygen present on the surface for the photoresponses was emphasized.View full abstractDownload PDF (509K) -
MITSUJI YANAI, MASAAKI YAMAGUCHI1968 Volume 16 Issue 7 Pages 1244-1250
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSReaction of 3, 6-dialkoxypyridazine 1-oxides (I) with halogeno compounds afforded corresponding esters of cyclic hydroxamic acid (II). Decomposition of II with acids, alkalines and pyrolysis gave aldehydes and 3-alkoxy-6 (1H) pyridazinones (V), or conjugated carbonyl olefines and 1-hydroxy-3-alkoxy-6 (1H) pyridazinones (IV), respectively.View full abstractDownload PDF (740K) -
ZENICHI HORII, HIDEO HAKUSUI, TAKEFUMI MOMOSE, ETSUKO YOSHINO1968 Volume 16 Issue 7 Pages 1251-1261
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSThe Friedel-Crafts condensation of 3-methoxyphthalic anhydride (IV) gave predominantly 3-methoxy-2-aroylbenzoic acid types. On employment of anhydrous aluminum chloride as a condensing agent, this tendency was exclusive. The Grignard reaction of IV also gave a similar result. The boron trioxide catalyzed condensation of 3-hydroxyphthalic anhydride (IVa), on the contrary, gave exclusively 2-hydroxy-6-aroylbenzoic acid types. The structures of the isomeric aroylbenzoic acid derivatives were established by conversion of them into hydroxynaphthacenequinones.View full abstractDownload PDF (1280K) -
ZENICHI HORII, HIDEO HAKUSUI, TAKEFUMI MOMOSE1968 Volume 16 Issue 7 Pages 1262-1265
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSBisanhydroaklavinone (II) was synthesized by a series of reactions shown in Chart 2. The synthesis provides an unequivocal confirmation for the structure of aklavinone (I).View full abstractDownload PDF (528K) -
TOSHIO NAMBARA, HIROSHI HOSODA, SHUJIRO GOYA1968 Volume 16 Issue 7 Pages 1266-1272
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSEpimeric 3β-acetoxy-16-bromo-5α, 13α-androstan-17-ones were synthesized starting from 3β-acetoxy-5α, 13α-androstan-17-one, and their structures were confirmed by the standard method of Fieser and Ettorre. An equilibrated mixture obtained from each one of epimers with hydrogen bromide was found to consist of 23% 16β and 77% 16α. On the basis of infrared, ultraviolet, nuclear magnetic resonance spectra and optical rotatory dispersion curves the conformation of ring D was discussed.View full abstractDownload PDF (774K) -
HISASHI NOGAMI, JUN HASEGAWA, TOKUJI SUZUKI, KOJI HIRATA1968 Volume 16 Issue 7 Pages 1273-1284
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
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TETSUJI KAMETANI, HIDEO AGUI, KEIICHIRO FUKUMOTO1968 Volume 16 Issue 7 Pages 1285-1287
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESScis-(IIa) and trans-16-Hydroxy-15-methoxyerythrinanone (IIb) were prepared by phenolic cyclization and the former (IIa) was transformed to corresponding cis-erythrinane (VII) by lithium aluminum hydride and to 15, 16-dimethoxyerythrinane (VI) via cis-15, 16 dimethoxyerythrinanone (Va). cis-(Va) and trans-15, 16-dimethoxyerythrinanone (Vb) were obtained from homoveratrylamine (VIII) and 2-carboxymethylcyclohexanone ethylene ketal (IX).View full abstractDownload PDF (445K) -
MICHIO MATSUI, MASASHI OKADA, MORIZO ISHIDATE1968 Volume 16 Issue 7 Pages 1288-1293
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSBenzoyl migrations took place in the partical acid hydrolysis of 1, 2, 3, 5-tetra-O-benzoyl-4, 6-O-ethylidene-D-glucitol (III) to give 1, 2, 4, 6-tetra-O-benzoyl-D-glucitol (IV). This finding is principally based on the experimental result that chromium trioxide oxidation of IV in acetone-sulfuric acid afforded the following five compounds : 1, 3, 5, 6-tetra-O-benzoyl-L-sorbose (V), 1, 2, 4, 6-tetra-O-benzoyl-D-ribo-3-hexulose (IX), 2, 3, 5, 6-tetra-O-benzoyl-L-gulonolactone (VIII), di-O-benzoyl-L-glyceric acid (XI), and benzoylglycolic acid (XII). The formation of VIII from IV in this oxidation indicates that benzoyl migration occurred also during the oxidation.View full abstractDownload PDF (805K) -
MICHIO MATSUI, MASAKO SAITO, MASASHI OKADA, MORIZO ISHIDATE1968 Volume 16 Issue 7 Pages 1294-1299
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSSynthesis of benzyl 2, 4, 5, 6-tetra-O-benzyl-L-gulonate (IX), a prospective starting material leading to β-keto-L-gulonic acid (II), was described. Oxidation of IX with the Pfitzner-Moffatt reagent gave a mixture of β-keto esters (X, XI) epimeric at C-2 and their enol-form, which was debenzylated by catalytic hydrogenation to afford L-xylulose (III), decarboxylation product of II, as the principal product and probably 2, 3-diketo-L-gulonic acid (XII).View full abstractDownload PDF (779K) -
GENSHUN SUNAGAWA, MITSUO WATATANI1968 Volume 16 Issue 7 Pages 1300-1307
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSChlorination of cycloheptimidazol-2 (1H)-one (I) and 6-hydroxy derivative (XII) with phosphoryl chloride in the presence of various bases was examined. Reexamination of the pubilshed procedure for the chlorination of I in the presence of pyridine mainly gave a hitherto unreported product, 2-(1, 4-dihydropyridino) cycloheptimidazole (V), and the reported 2-chlorocycloheptimidazole (II) was obtained only in a poor yield. By the modified procedure, 1-(2-cycloheptimidazolyl) pyridinium chloride (VIII) and the pyridinium salt (XV) were obtained from I and XII, respectively, and the treatment of VIII with alkali solution gave V. When the chlorination was carried out in the presence of dimethylaniline, the attack of dimethylaniline in the para-position or nitrogen occurred, and consequently, 2-(N-methylanilino) cycloheptimidazole (XVI), 2-chloro-4 (and 6-)-(p-dimethylaminophenyl) cycloheptimidazole (XVIII and XIX) were obtained from I, and 2-chloro-6-(N-methylanilino) cycloheptimidazole (XXVI) and 2, 6-dichloro-4-(p-dimethylaminophenyl) cycloheptimidazole (XXVII) from XII, respectively. The use of diethylaniline in the chlorination of I prevented the side reaction and II was obtained in a good yield.View full abstractDownload PDF (923K) -
GENSHUN SUNAGAWA, MITSUO WATATANI1968 Volume 16 Issue 7 Pages 1308-1315
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSThe preparation and some nucleophilic substitution reactions of 2-alkoxycycloheptimidazole derivatives were examined. Reaction of 2-methoxytropone derivatives with O-ethylisourea gave 2-ethoxycycloheptimidazoles (II, VIII to XIV) listed in Table I. The reaction of 2-methoxytroponeimine (V) with O-ethylisourea gave 2-aminocycloheptimidazole (VI) and 2-phenylcycloheptimidazole (VIII), besides 2-ethoxycycloheptimidazole (II). Reactions of II with sodium butoxide, aqueous ammonia, and dimethylamine gave 2-butoxy-(XXIX), 2-amino-(VI), and 2-dimethylaminocycloheptimidazole (XXX), respectively. Reaction of 4- and 6-bromo-2-ethoxycycloheptimidazole (VIII and IX) with dimethylamine resulted in displacement of the bromine atom on the seven-membered ring giving 4- and 6-dimethylamino-2-ethoxycycloheptimidazole (XXXI and XXXII), respectively. 2-Ethoxy-6-nitrocycloheptimidazole (XII) and IX gave 2, 6-diethoxycycloheptimidazole (XXXIII) by their reaction with sodium ethoxide. Acid hydrolysis of 2-ethoxycycloheptimidazoles (VIII to XIV) gave cycloheptimidazol-2 (1H)-ones (XXXV to XLIII) listed in Table II, whose substituents on the seven-membered ring remained unchanged. On the other hand, acid hydrolysis of XXXIII occurred preferentially at C-6 and 2-ethoxycycloheptimidazol-6 (1H)-one (XLIV) was obtained.View full abstractDownload PDF (899K) -
MITSUO WATATANI, NOBUO SOMA, GENSHUN SUNAGAWA1968 Volume 16 Issue 7 Pages 1316-1323
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSFormation and some electrophilic reactions of 2-imino-2H-cycloheptoxazole derivatives were described. Reaction of 2-methoxytropone (I) with O-ethylisourea or cyanamide in the presence of sodium ethoxide gave the sodium salt of 2-cyanaminotropone (III). Neutralization of III resulted in the cyclization to its ring-tautomer, 2-imino-2H-cycloheptoxazole. The sodium salts (VII-XIII) listed in Table I were obtained by the reaction of substituted 2-methoxytropones with sodium salt of cyanamide. 8-Isopropyl-(XIV), 6-chloro-(XV), and 8-chloro-2-imino-2H-cycloheptoxazole (XVI) were prepared by the neutralization of the sodium salts (XIII, VII, and VIII), and their ring-chain tautomerisms were discussed. The reaction of V with benzoyl, p-toluensulfonyl, and tropylium chloride in the presence of triethylamine gave 2-benzoyl-(XXV), 2-(p-toluensulfonyl) imino-(XXVIII), and 2-tropylimino-2H-cycloheptoxazole (XXX), respectively. heptoxazole (XXIX). Heating of XXV in ethanol solution gave N-benzoylcarbamoyl-2-ethoxytroponeimine (XXVII). While the treatment of XXV with anhydrous hydrogen chloride gave its hydrochloride (XXVI), the similar acid treatment of XXX resulted in its decomposition to VI and a tropylium cation.View full abstractDownload PDF (874K) -
KAZUO TOMITA, MITSUO NAGANO1968 Volume 16 Issue 7 Pages 1324-1329
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSThe reaction of sodium alcoholates of sec- or tert- α-acetylenic alcohole having no ethynyl group with carbon disulfide in an aprotic solvent gave 4-alkylidene-1, 3-oxathiolane-2-thiones, but from alcohols having ethynyl group 4-methylidene-1, 3-dithiolane-2-thiones, or their rearranged isomers were mainly isolated, and in the case of 1-hexyn-3-ol (VI) or 1-ethynylcyclohexano 1 (XV) 4-methylidene-1, 3-oxathiolane-2-ones were also isolated.View full abstractDownload PDF (612K) -
MORIO IKEHARA, KATSUTOSHI MURAO1968 Volume 16 Issue 7 Pages 1330-1336
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESS8-Oxyguanosine 5'-mono-, 5'-di- and 5'-tri-phosphate were synthesized from 2', 3'-O-isopropylidene-8-oxyguanosine by the phosphorylation with P1-diphenyl, P2-morpholinopyrophosphoro chloridate, follwed either by acidic removal of the protecting group, reaction with inorganic phosphate in the presence of DCC, or by the reaction of its morpholidate with pyrophosphate. 5'-Monophosphate was hydrolyzed by the catalysis with snake venom 5'-nucleotidase. 8-Oxyguanosine 2', 3'-cyclic phosphate, which was obtained by the direct phosphorylation method from 5'-O-acetyl-8-oxyguanosine, was completely resistant against pancreatic RNase and RNase T1. Deamination of 8-oxyguanosine and its monophosphate was investigated. In the presence of excess nitrous acid a rapid loss of ultraviolet absorption was observed. With the use of limited amount of nitrous acid, uric acid 9-riboside 5'-monophosphate was obtained.View full abstractDownload PDF (785K) -
TETSUZO KATO, HIROSHI YAMANAKA, HIDETOSHI HIRANUMA1968 Volume 16 Issue 7 Pages 1337-1341
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSThe reaction of 2, 6-disubstituted-4-chloropyrimidines (I) with hydrogen peroxide in acetic acid does not afford their N-oxides but results in the rearrangement of chlorine to give 2, 6-disubstituted-5-chloro-4-pyrimidones (II). The preparation of chloropyrimidine N-oxides (IV) is successful when mono-permaleic acid is used as an oxidizing reagent.View full abstractDownload PDF (560K) -
HARUAKI YAJIMA, KOICHI KAWASAKI, YASUHIKO KINOMURA, TAKAO OSHIMA, SHOS ...1968 Volume 16 Issue 7 Pages 1342-1350
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSUnder anhydrous conditions, the Na-benzyloxycarbonyl group attached to methionine was quantitatively removed by catalytic hydrogenation over a palladium catalyst in the presence of boron trifluoride etherate in methanol. Application of this procedure for the synthesis of methionine-peptides was demonstrated by the successful preparation of the C-terminal pentapeptides of eledoisin and physalaemin. Phenylalanylisoleucylglycylleucylmethionine amide and phenylalanyltyrosylglycylleucylmethionine amide were prepared by hydrogenation of the corresponding Na-benzyloxycarbonyl derivatives in quantitative yield. It was shown also that arginylmethionine methyl ester could be prepared by catalytic hydrogenation of Na-benzyloxycarbonyl-NG-nitroarginine methyl ester. Partial methylation of the free carboxyl group is one of the side reaction in this procedure. Scope and limitation of catalytic hydrogenation of the benzyloxycarbonyl group in the presence of boron halides in anhydrous organic solvents were examined.View full abstractDownload PDF (1132K) -
YUKICHI KISHIDA, ATSUSUKE TERADA1968 Volume 16 Issue 7 Pages 1351-1359
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSTreatment of ethyl propiolate (I) with thiourea or ammonium dithiocarbamate under neutral conditions gave diethyl cis-cis-β, β'-thioacrylate (II), stereospecifically. Analogously II was obtained from ethyl cis-β-chloroacrylate and the same reagents. II was easily converted to trans-trans-II (XII) by heating or irradiation. On the other hand, the reactions of β-substituted acetylenic acid esters (XVII a-f) with thiourea afforded the corresponding 1, 3-thiazine derivatives (XVIII a-f), unexpectedly. The reactions of propiolonitrile (XX), tetrolonitrile (XXIII) and phenylpropiolonitrile (XXV) with thiourea or ammonium dithiocarbamate afforded cis-cis-β, β'-thioacrylonitrile (XXI), cis-cis-β, β'-thiocrotononitrile (XXIV) and cis-cis-β, β'-thiocinnamonitrile (XXVI), respectively.View full abstractDownload PDF (946K) -
KEIJI SEKIGUCHI, ISAMU HORIKOSHI, IKUZO HIMURO, SOUICHI MIKAMI1968 Volume 16 Issue 7 Pages 1360-1366
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSA new semimicro apparatus for the simultaneous measurement of the differential temperature and the dielectric behavior was constructed and the characteristics of the electric circuits for these physical parameters were discussed. Also, tests concerning dehydration of copper sulfate pentahydrate and glucuronamide monohydrate, polymorphic transition of potassium nitrate and molecular compound formation between aminopyrine and barbital were carried out. The results indicate that the apparatus is sensitive to any one of these phase reactions and is superior to the monofunctional thermal analyzer, especially in that the formation of aqueous solution from a hydrate and the end point of some kinds of phase reactions are more clearly determined.View full abstractDownload PDF (760K) -
YOSHIO SASAKI, MIYOKO SUZUKI, TOSHIHIKO HIBINO, KAZUKO KARAI, MINORU H ...1968 Volume 16 Issue 7 Pages 1367-1375
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSThe ring 1H chemical shift in 2-substituted and 2-substituted 6-methoxynaphthalene series has been examined in the following items : 1. The shielding parameters of H1, H3 and H4 in the above series have been estimated from the chemical shift ratios δH1/do (R), δH3/do (R) and δH4/dm (R). 2. π-Electron charge density in C6H6 and naphthalene series. 3. Simple sum rule of π-electron charge density. 4. The correlation revised chemical shift with π-electron charge density. 5. Coupling constant and side chain chemical shift.View full abstractDownload PDF (697K) -
EIGO TAKABATAKE, MASATOSHI NAGAWA, MITSURU KATAOKA1968 Volume 16 Issue 7 Pages 1376-1377
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
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YOSHIO HIROSE, JINSAKU KUSUDA, SUSUMU NONOMURA, HIROYOSHI FUKUI1968 Volume 16 Issue 7 Pages 1377-1379
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
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HARUAKI YAJIMA, KOICHI KAWASAKI1968 Volume 16 Issue 7 Pages 1379-1382
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
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MICHIO MATSUI, MASASHI OKADA, TOSHIO IMANARI, ZENZO TAMURA1968 Volume 16 Issue 7 Pages 1383-1387
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
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HARUAKI YAJIMA, KOICHI KAWASAKI1968 Volume 16 Issue 7 Pages 1387-1390
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
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MINEO SANEYOSHI, MORIO IKEHARA1968 Volume 16 Issue 7 Pages 1390-1394
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
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TOSHIO NAMBARA, YASUHIKO MATSUKI1968 Volume 16 Issue 7 Pages 1394-1396
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
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SHUNICHI HATA, SUIICHI TOMIOKA1968 Volume 16 Issue 7 Pages 1397-1399
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
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SATOSHI OMURA, MICHIKO KATAGIRI, TOJU HATA, MIKIO HIRAMATSU, TERUTOSHI ...1968 Volume 16 Issue 7 Pages 1402-1404
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
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KENYU SHIBATA, HIROMU MORI1968 Volume 16 Issue 7 Pages 1404-1406
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
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HIROMU MORI, KENYU SHIBATA, KIYOSHI TSUNEDA, MASANOBU SAWAI, KYOSUKE T ...1968 Volume 16 Issue 7 Pages 1407-1409
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
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AKIRA HANAKI1968 Volume 16 Issue 7 Pages 1409-1411
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
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TEISUKE OKANO, KANETO UEKAMA1968 Volume 16 Issue 7 Pages 1411-1413
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
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MANKI KOMATSU, TSUYOSHI TOMIMORI, KOSAKU TAKEDA, KOZO HAYASHI1968 Volume 16 Issue 7 Pages 1413-1415
Published: July 25, 1968
Released on J-STAGE: March 31, 2008
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