bluuebunny/crossref_metadata_2025_split huggingface dataset:
A NEW METHOD FOR THE PREPARATION OF UNSYMMETRICAL ETHERS. THE REACTION OF ALKYL 2,4-DICHLOROPHENYL ACETALS WITH GRIGNARD REAGENTS ACTIVATED BY TiCl4
Authors: Ishikawa Hiroshi , Mukaiyama Teruaki 
Published: July 2006

Abstract
It was found that, in the presence of TiCl4, alkyl 2,4-dichlorophenyl acetals react with Grignard reagents to give the corresponding unsymmetrical ethers in high yields.
ELECTRONIC SWITCHING IN DIBENZO-18-CROWN-6 THIN FILM
Authors: Sakai Yoshiro , Sadaoka Yoshihiko 
Published: July 2006

Abstract
Field-induced switching between a high impedance state and a low impedance state was observed in a pure dibenzo-18-crown-6 film sandwiched between evaporated silver electrodes. The frequency dependence of ac conductivity in the high impedance state was interpreted in terms of hopping charge transport.
THE SYNTHESIS OF ALANYL-α-AMINOPROPIONITRILES-(Dl-dl, L-DL, and L-L) BY DEHYDRATING THE CORRESPONDING N-o-NITROPHENYLSULFENYLALANYLALANINE AMIDES
Authors: Kawashiro Katsuhiro , Yoshida Hideyuki , Morimoto Shiro 
Published: July 2006

Abstract
N-o-Nitrophenylsulfenylalanylalanine amides(Dl-dl, L-DL, and L-L) were dehydrated In POCl3-pyridine without affecting their N-protecting groups. The N-protected dipeptide nitriles obtained were treated with anhydrous HCl in ethyl acetate to give the hydrochlorides of the corresponding dipeptide nitriles. The results of ion exchange chromatography of these products Indicated that the optical purity of the α-aminopropionitrile group was well retained.
IDENTIFICATION OF ASPARAGUSIC ACID AS A NEMATICIDE OCCURRING NATURALLY IN THE ROOTS OF ASPARAGUS
Authors: Takasugi Mitsuo , Yachida Youichi , Anetai Masaki , Masamune Tadashi , Kegasawa Kazuo 
Published: July 2006

Abstract
A nematicidal constituent, present at least at 35 ppm, was isolated from the roots of asparagus and identified as asparagusic acid, which has also been reported to exist in the edible part of the plant. The acid was toxic to several plant parasitic nematodes and would be a major factor in resistance of asparagus.
NEW TYPE OF MESOIONIC SYSTEM. 1,3-DIPOLAR CYCLOADDITION OF ISOMUNCHNON WITH ETHYLENIC COMPOUNDS
Authors: Hamaguchi Masashi , Ibata Toshikazu 
Published: July 2006

Abstract
Treatment of anhydro-4-hydroxy-l,3-oxazolium hydroxide (2; named isomünchnon) with ethylenic dipolarophiles gave 1,3-dipolar cycloadducts in high yields. Stereochemistry of these cycloadducts was confirmed by the investigation of nmr coupling constants.
A CONVENIENT METHOD FOR THE SYNTHESIS OF FURAN DERIVATIVES
Authors: Mukaiyama Teruaki , Ishihara Hideharu , Inomata Katsuhiko 
Published: July 2006

Abstract
It was found that furan derivatives are synthesized in good yields from β-alkoxy-γ-bromoketones formed by the TiCl4-promoted reaction of α-bromoacetals with silyl enol ethers.
A CONVENIENT METHOD FOR THE SYNTHESIS OF 2-(1-ALKENYL)-2-CYCLOPENTENONES
Authors: Ishihara Hideharu , Inomata Katsuhiko , Mukaiyama Teruaki 
Published: July 2006

Abstract
It was found that 2-(1-alkenyl)-2-cyclopentenones were synthesized in good yields from β-alkoxy-γ-bromoketones formed by the TiCl4-promoted reaction of α-bromoacetals with 1-trimethylsiloxy-1-cyclopentene.
O-ACETYL-N-(N′-BENZOYL-l-PHENYLALANYL)-l-PHENYLALANINOL. ISOLATION FROM EUPHORBIA FISCHERIANA STEUDEL
Authors: Uemura Daisuke , Sugiura Kimio , Hirata Yoshimasa 
Published: July 2006

Abstract
O-Acetyl-N-(N′-benzoyl-l-phenylalanyl)-l-phenylalaninol was isolated from Euphorbia fischeriana Steudel. The structure has been established by nmr spectral analysis and the synthesis of this compound.
BROMINATION AND NITRATION OF SOME MIXED LIGAND ACETYLACETONATOCOBALT(III) COMPLEXES
Authors: Yoshitani Kouzou , Kunigita Kazufumi , Watanabe Kiyokatsu , Kuroda Kashiro 
Published: July 2006

Abstract
Four kinds of mixed ligand acetylacetonatocobalt(III) complexes ((NH3)4-, (en)2-, α-trien-, and β-trien-complexes) have been substituted with bromine, and five (the above four and fac(N)-i-DTMA-complex) have been substituted with nitro group at the central methine of the ligand. The brominated and the nitrated complexes have been isolated and identified by means of the electronic absorption spectra and the NMR spectra.
SYNTHESIS AND COMPLEX FORMATION OF MACROMOLECULES HAVING TETRATHIOFULVALENE STRUCTURE
Authors: Ueno Yoshio , Masuyama Yoshiro , Okawara Makoto 
Published: July 2006

Abstract
The new polymer containing tetrathiofulvalene (TTF) structure was synthesized by coupling of polymethylene-bis-4-(1,3-dithiole-2-thione) with base and charge transfer (CT) complex formation of them with tetracyano-p-quinodimethane (TCNQ) and 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) was examined.
AZAFULVENES 1. A NOVEL GENERATIVE METHOD OF 6-AMINO-1-AZAFULVENE AND ITS CYCLOADDITION REACTION WITH ISOCYANATE AND ISOTHIOCYANATE
Authors: Watanabe Masanori , Kobayashi Takashi , Kajigaeshi Shoji , Kanemasa Shuji 
Published: July 2006

Abstract
Pyrrole-2-carboxaldehyde reacted with sec. amines affording dipyrrolo[1,2-a:1′,2′-d]pyrazines which corresponded to the dimers of 6-amino-1-azafulvenes. Pyrolytic decomposition of the pyrazine derivatives in the presence of dienophiles such as phenyl isocyanate, phenylisothiocyanate and benzoyl isocyanate gave pyrrolo[1,2-c]imidazoles. These results can be interpreted by the initial formation of 6-amino-1-azafulvenes on pyrolysis following the [6+2]cycloaddition reactions with dienophiles.
SYNTHESIS OF SEVERAL SIMPLE PHENAFULVENES AND SOME ADDITION REACTIONS OF PHENAFULVENE DERIVATIVES
Authors: Morita Noboru , Asao Toyonobu 
Published: July 2006

Abstract
Phenafulvenes substituted at 10-positions with methyl and/or chloro groups have been synthesized in good yields by the reaction of phenalenone with methyl and/or chloro ketenes. Oxygenations of 10,10-dimethyl- and 10,10-diphenylphenafulvenes afforded epidioxides and cleavage of the oxides gave 8-substituted phenalenones. Diels–Alder reactions of 10,10-dimethylphenafulvene yielded the corresponding adducts at C-8 and C-10 positions.
ANOMALOUS ACTIVATION ENERGY OF THERMAL 1,5-HYDROGEN SHIFT IN 1,2-BENZOTROPILIDENE
Authors: Hashimoto Kazunobu , Amano Akira 
Published: July 2006

Abstract
Activation energy of approximately 10 kcal/mol higher than that usually encountered in 1,5-hydrogen shifts in acyclic and cyclic 1,3-dienes was observed in the gas phase thermal reaction of 1,2-benzotropilidene. The value is attributable to the intermediary formation of 4,5-benzotropilidene in which aromatic resonance is not fully developed.
NUCLEAR QUADRUPOLE RESONANCES OF AlBr3·SbBr3, AlI3·SbI3, AND AlBr3·BiBr3
Authors: Okuda Tsutomu , Yamada Koji , Ishihara Hideta , Negita Hisao 
Published: July 2006

Abstract
The NQR spectra and their Zeeman effects in AlX3·SbX3 (X=Br, I) and AlBr3·BiBr3 were observed. The former adducts consist of AlX4− and SbX2+, although there are weak bonds between SbX2+ and AlX4− ions through the halogens of AlX4− ion. On the other hand, AlBr3·BiBr3 shows somewhat different feature compared with the formers.
INVESTIGATION ON CROSS-OVER COMPLEXES. MAGNETIC PROPERTIES OF IRON(III) COMPLEXES WITH SEVERAL SCHIFF BASES
Authors: Nishida Yuzo , Oshio Shuhei , Kida Sigeo 
Published: July 2006

Abstract
Iron(III) complexes with several tetradentate Schiff Bases [FeLXY]n+ and [Fe salen CN] were synthesized, where L is a tetradentate Schiff Base including salen = NN′-ethylenebis(salicylideneiminate), X and Y represent imidazole and cyanide ion. Magnetic susceptibilities and ESR spectra were measured for these complexes from liquid nitrogen to room temperatures. The results have revealed that those complexes consist of four types in view of the spin states, that is high-spin (S = 5/2), low-spin (S = 1/2), intermediate (S = 3/2) and spin-equilibrium (S = 1/2 \ightleftarrowsS = 5/2) states.
RESONANCE RAMAN SCATTERING FROM HEMOPROTEINS: THE NATURE OF THE BOND BETWEEN THE SIXTH LIGAND AND THE HEME IRON IN FERROUS LOW SPIN DERIVATIVES OF HEMOGLOBIN
Authors: Kitagawa Teizo , Iizuka Tetsutaro , Saito Masao , Kyogoku Yoshimasa 
Published: July 2006

Abstract
Classification of the Raman spectra of various hemoproteins including HbNO and HbCNC2H5 suggests that there are two kinds of ferrous low spin states. They are specified by the binding nature of the sixth ligand (L) to heme iron. The Fe–L bond in HbNO and HbCNC2H5 as well as in HbCO and HbO2 is of π type while that in ferrous cytochromes b5 and c is of σ type.
A NEW METHOD FOR THE SYNTHESIS OF 3-ALKYLFURAN AND 2,4-DIALKYLFURAN
Authors: Taguchi Takeo , Okamura Hisashi , Takei Hisashi 
Published: July 2006

Abstract
A convenient method for the preparations of 3-alkylfuran and 2,4-dialkylfuran has been established via three step-procedures starting from α-(alkylthio)carbonyl compounds.
THE SYNTHESIS AND REACTION OF α,α-BIS(PHENYLTHIO)-γ-BUTYROLACTONE. A CONVENIENT METHOD FOR THE PREPARATION OF 3-SUBSTITUTED 2-BUTEN-4-OLIDE
Authors: Watanabe Mikio , Shirai Kozo , Kumamoto Takanobu 
Published: July 2006

Abstract
The reaction of γ-butyrolactone with N-phenylthiophthalimide in the presence of lithium diisopropylamide afforded α,α-bis (phenylthio)-γ-butyrolactone 1 in high yield. Further, a convenient method for the preparation of 3-substituted 2-buten-4-olide was established by the use of 1.
CONTINUOUS SILICON CARBIDE FIBER OF HIGH TENSILE STRENGTH
Authors: Yajima Seishi , Hayashi Josaburo , Omori Mamoru 
Published: July 2006

Abstract
Continuous silicon carbide fiber of high-tensile strength (about 350 Kg/mm2) was synthesized by means of the heat-treatment of organosilicon polymer obtained from dodecamethylcyclohexasilane. X-ray analysis and high voltage electron microscopic observations revealed that the obtained continuous fiber is an ultrafine grain structure of β-silicon carbide.
SYNTHESIS OF 4-AMINO-2-HYDROXYBUTYRIC ACIDS
Authors: Sato Hiroko , Kusumi Takenori , Imaye Kiyoto , Kakisawa Hiroshi 
Published: July 2006

Abstract
1,3-Dipolar addition of the nitronic ester 1 to methyl acrylate and methyl crotonate afforded the corresponding adducts, 2 and 6, respectively. These were converted to the 4-amino-2-hydroxybutyric acids, 5 and 8.
PHOTOCHEMICAL TRANSFORMATION OF MERCURIC SULFIDE INTO METHYLMERCURY IN AQUEOUS SOLUTIONS
Authors: Akagi Hirokatsu , Fujita Yuzaburo , Takabatake Eigo 
Published: July 2006

Abstract
Photochemical solubilization and methylation of mercuric sulfide have been studied in aqueous acetic acid solutions. Mercuric sulfide was solubilized gradually and almost completely after three weeks by irradiation with the light of a blacklight lamp. The measurements of methylmercury photo-produced in the aqueous system demonstrated that the rate of the production of methylmercury was in good agreement with that of the photo-solubilization of mercuric sulfide.
PHOTOCHEMICAL REACTIONS OF 1-PHENYL-2-PROPYN-1-ONE IN ALCOHOLS: FORMATION OF FURANS
Authors: Nishio Takehiko , Omote Yoshimori 
Published: July 2006

Abstract
Irradiation of 1-phenyl-2-propyn-1-one (1) in various alcohols afforded 2-alkyl-5-phenyl furans (2a–d) via cyclization of the intermediate (4), 1:1-addition product of (1) and each alcohol.
QUENCHING OF THE TRIPLET STATE OF ACETYLENE BY ETHYLENE
Authors: Tsukada Masao 
Published: July 2006

Abstract
It was confirmed that the excited state of acetylene formed in the mercury photosensitized reaction was quenched by ethylene, the excited state being monitored through phosphorescence of biacetyl mixed as a probe. The results provide an estimate on the relative value of the rate constant for the quenching process.
A FACILE AND GENERAL SYNTHESIS OF 4-HYDROXYCYCLOPENTENONES
Authors: Shono Tatsuya , Matsumura Yoshihiro , Hamaguchi Hiroshi , Nakamura Koichi 
Published: July 2006

Abstract
Various rethrolones were prepared in good yields simply from 2,5-disubstituted furans. The electrooxidation of 2,5-disubstituted dihydrofurans gave 2,5-dimethoxy-2,5-disubstituted dihydrofurans. Hydrolysis of electrooxidation products with ion enchange-resin, followed by the treatment with base gave rethrolones. Furthermore, this method was applicable for the synthesis of 2-alkyl-4-hydroxycyclopentenone.
CONFORMATIONS OF N- (α-PHENYLBENZYLIDENE)ANILINES
Authors: Yoshida Masato , Minato Hiroshi , Kobayashi Michio 
Published: July 2006

Abstract
PMR spectra of N- (α-phenylbenzylidene) anilines were analyzed by use of differences in spin-lattice relaxation times on a pulse-FT-NMR spectrometer. The results suggested that both the imino benzene ring and the benzene ring adjacent to the imino benzene ring are greatly rotated out of the molecular plane.
A CONVENIENT METHOD FOR THE TRANSFORMATION OF ALCOHOLS TO ALKYL IODIDES USING 2-FLUOROPYRIDINIUM SALT
Authors: Kobayashi Susumu , Tsutsui Mikio , Mukaiyama Teruaki 
Published: July 2006

Abstract
1-Methyl-2-alkoxypyridinium salts, easily formed in situ from 1-methyl-2-fluoropyridinium salt and alcohols, react with sodium iodide to give the corresponding alkyl iodides in good yields.
LIQUID–LIQUID EXTRACTION OF VARIOUS METAL IONS WITH POLYETHYLENEGLYCOL AND ITS DERIVATIVES
Authors: Sotobayashi Takeshi , Suzuki Toshio , Tonouchi Shigemasa 
Published: July 2006

Abstract
Polyethyleneglycol (PEG) and its derivatives of high molecular weight, including polypropyleneglycol, were found to be used as extractants for the liquid–liquid extraction of small amounts of various metal ions. Their extraction with these extractants were studied from thiocyanate and iodide solutions. The extraction power of these extractants increased with the increasing number of ehtylene-oxide groups in PEG’s. The extractability of metal ions from their thiocyanate solution increased in the following order: Zn(II)&gt;Mo(V)&gt;Co(II)&gt;Fe(III)&gt;V(IV)&gt;Cu(I)&gt;Hg(II)&gt;Cd(II)&gt;Pb(II)&gt;Ni(II)
CONFORMATIONAL ANALYSIS OF β-METHOXY-β-PHENYLETHYLTHALLIUM(III) COMPOUNDS: EVIDENCE FOR TRANS ADDITION IN OXYTHALLATION OF STYRENE
Authors: Kurosawa Hideo , Kitano Ryuichiro , Okawara Rokuro 
Published: July 2006

Abstract
1H NMR conformational analysis of the title compounds derived from styrene and β-styrene-d provided evidence for trans addition in oxythallation of styrene.
REACTION OF TERTIARY PHOSPHINE DICHLORIDES WITH THIOLS IN THE PRESENCE OF TRIETHYLAMINE. A CONVENIENT METHOD FOR THE REDUCTION OF PHOSPHINE OXIDES TO PHOSPHINES
Authors: Masaki Mitsuo , Fukui Kiyoshi 
Published: July 2006

Abstract
The reaction of phosphine dichlorides with 1- or 2-alkanethiols or benzenethiol in the presence of triethylamine and subsequent distillation afforded phosphines and disulfides in good yields. The reaction was shown to be useful for reduction of tertiary phosphine oxides to the corresponding phosphines.
HOMOGENEOUS TRANSFER HYDROGENATION OF KETONES CATALYZED BY MOLYBDENUM COMPLEXES
Authors: Tatsumi Takashi , Kizawa Kazutoshi , Tominaga Hiroo 
Published: July 2006

Abstract
Phosphine complexes of molybdenum, especially bisdinitrogen-bis[1,2-bis(diphenylphosphino)ethane]molybdenum and tetrahydridobis-[1,2-bis(diphenylphosphino)ethane]molybdenum promote transfer hydrogenation of ketones by hydrogen donors, amongst which secondary alcohols are most effective.
ABSOLUTE CONFIGURATION OF AMINOGLYCOSIDE ANTIBIOTICS P-2563 (P) AND (A)
Authors: Nara Kiyoshi , Katamoto Kazuyoshi , Suzuki Shigeru , Akiyama Shunichi , Mizuta Eiji 
Published: July 2006

Abstract
The absolute configuration of the aminopolyol moiety (XI) of the aminoglycoside antibiotics P-2563 (P) (I) and (A) (II) was established to be 2S, 3S, 4R and 5S from the evidence that XI gave methyl 3,6-diacetamido-3,6-dideoxy-α-l-gulopyranoside through the oxidation of the hydroxymethyl group at C-6. From this fact, together with the plane structures of I and II and 13C-NMR studies, the absolute configuration of I and II were elucidated to be 3-O-(4-deoxy-4-propionamido-α-d-glucopyranosyl)-(2S, 3S, 4R, 5S)-1,4-diamino-1,4-dideoxyhexitol and 3-O-(4-acetamido-4-deoxy-α-d-glucopyranosyl)-(2S, 3S, 4R, 5S)-1,4-diamino-1,4-dideoxy-hexitol, respectively.
RAPID REACTION BETWEEN SULFONIUM ION AND SULFIDE. PREPARATIVE REDUCTION OF SULFOXIDE TO SULFIDE
Authors: Tanikaga Rikuhei , Nakayama Koji , Tanaka Kazuhiko , Kaji Aritsune 
Published: July 2006

Abstract
A very rapid oxygen exchange reaction between a sulfoxide and dimethyl sulfide took place with trifluoroacetic anhydride. A plausible mechanism involves the nucleophilic attack of a sulfide on a sulfonium sulfur atom. From these findings a convenient method for the reduction of a sulfoxide to a sulfide is described.
EFFECT OF WATER STRUCTURE ON POLY-ε-BENZYLOXYCARBONYL-l-LYSINE MONOLAYERS
Authors: Yamashita Takuya , Shibata Akira , Yamashita Shinsuke 
Published: July 2006

Abstract
In relation to the structure of water at the interfacial region, the effects of monovalent anions on the surface pressure-area curves of poly-ε-benzyloxycarbonyl-l-lysine were investigated. The effects of anions on increasing the surface pressure were in the order of SCN−&gt; Br−&gt; Cl−&gt; F− in accordance with that of these anions as breakers of water structure.
REACTION OF TRICYCLO[4.2.2.02,5]DECA-3,7-DIENE DERIVATIVES IN DMSO
Authors: Sasaki Tadashi , Kondo Akihiro 
Published: July 2006

Abstract
Reaction of tricyclo[4.2.2.02,5]deca-3,7-diene derivatives 1 or 2 with DMSO-conc.HCl gave transannular methylthiolactonization product 3 and 3-chloro-4-methylthiotricyclo[4.2.2.02,5]dec-7-ene derivatives 4. Reaction of 1 or 2 with HBF4 in DMSO resulted in the protonation of the cyclohexene double bond. These results have been interpreted as the result of the orbital interaction of electrophile′s LUMO and olefin′s HOMO.
COMPLEX FORMATION BETWEEN [Co(OH)2tren]+ AND DIVALENT METAL IONS
Authors: Fujii Shigeji , Shibahara Takashi , Mori Masayasu 
Published: July 2006

Abstract
The stability constants of complex formation between [Co(OH)2tren]+ as a ligand and some divalent metal ions were determined by Bjerrum’s method. The values of log K1 and log K2 in this order are: Co, 2.85, 3.0; Ni, 3.0, 3.5; Cu, 6.3, 5.0; Zn, 3.6, 3.0; Cd, 2.6, 2.2. Some relevant 1:2 and 1:3 complexes have been isolated as the perchlorates.
STRUCTURE OF COMMENSURATE PEIERLS STATE OF Rb1.67Pt(C2O4)2·1.5H2O
Authors: Kobayashi Akiko , Sasaki Yukiyoshi , Kobayashi Hayao 
Published: July 2006

Abstract
X-ray examination, chemical analyses and electrical conductivity measurements were made on the partially oxidized platinum complex Rb1.67Pt(C2O4)2·1.5H2O (RbDOX). Sixfold modulated superstructure of RbDOX is confirmed as the newly found commensurate Peierls structure based on the agreement with the period of the Peierls distorted superlattice determined by the degree of partial oxidation.
PREPARATION AND PROPERTIES OF MOLYBDENUM AND TUNGSTEN DINITROGEN COMPLEXES 9. CONVERSION OF THE LIGATING DINITROGEN INTO HYDRAZINE
Authors: Hidai Masanobu , Mizobe Yasushi , Takahashi Tamotsu , Uchida Yasuzo 
Published: July 2006

Abstract
The complex cis-W(N2)2(PMe2Ph)4 or WBr2(NNH2)(PMe2Ph)3 gave 0.60–0.65 mol N2H4/mol W upon treatment with excess of HCl gas in 1,2-dimethoxyethane. Molybdenum diazoalkane complexes MoCl2 (NN=CRR′) (PMe2Ph)3 also afforded hydrazine as the major product in the reaction with HCl gas.
PHOTOELECTROCHEMICAl IMAGING PROCESSES USING SEMICONDUCTOR ELECTRODES
Authors: Inoue Tooru , Fujishima Akira , Honda Kenichi 
Published: July 2006

Abstract
Photoelectrochemical reactions at semiconductor electrodes in the solution with metallic ions have been applied to the reproducible image formation. Photo-images were the oxide layer in the case of an n-type semiconductor electrode and the metal layer in the case of a p-type semiconductor electrode.
A FACILE METHOD FOR THE PREPARATION OF 5-ALKOXY-1,4-DIKETONES
Authors: Kuwajima Isao , Azegami Ichiro , Nakamura Eiichi 
Published: July 2006

Abstract
The title compoun\={a}s were prepared efficiently by Lewis acid catalyzed reaction of 1,2-bis(trimethylsiloxy)-1-cyclobutene with acetals, followed by addition of the Grignard reagent and ring cleavage of the resulting vis-diols with Pb(OAc)4.
METHANATION OF CARBON DIOXIDE AND CARBON MONOXIDE ON SUPPORTED Ni–La2O3–Ru CATALYST
Authors: Inui Tomoyuki , Funabiki Masaki 
Published: July 2006

Abstract
A novel type composite catalyst in which small amounts of La2O3 and Ru are incorporated with Ni substrate supported on a granulated silica having bimodal pore structure, was found to be a very efficient hydrogenation catalyst for selective methane formation from carbon oxides. Contrary to the case of Ni, the rate of CO2methanation on the presented catalyst was greater than that of CO methanation.
THE SELECTIVE SYNTHESIS OF 1,5-DISUBSTITUTED PYRAZOLES AND STRUCTURAL ELUCIDATION OF 1,3- AND 1,5-DISUBSTITUTED PYRAZOLES
Authors: Tamaru Yoshinao , Harada Toshiro , Yoshida Zen-ichi 
Published: July 2006

Abstract
1,5-Disubstituted pyrazoles with a bulky group at 5-position is synthesized selectively from a monosubstituted hydrazine and a 1,3-dicarbonyl derivative. The structures of the positional isomers (1,3- and 1,5-disubstituted pyrazoles) are determined unambiguously by the C13 NMR study.
DETECTION OF ANIONIC POLYACRYLAMIDE BY GPC
Authors: Furusawa Kunio , Onda Nobuhiko , Yamaguchi Noriko 
Published: July 2006

Abstract
By addition of a salt to the eluent, the large increase was observed for the elution volume of the partially hydrolyzed polyacrylamide. This feature was applied to the detection and the separation of the anionic polymers in the technical products of polyacrylamide.
PREPARATION OF OLEFINS BY REDUCTIVE ELIMINATION OF β-HYDROXYSULFIDES USING 2-FLUOROPYRIDINIUM SALT AND LITHIUM IODIDE
Authors: Mukaiyama Teruaki , Imaoka Masanori 
Published: July 2006

Abstract
Various olefins were prepared in good yields by reductive elimination of α-hydroxysulfides (1) with 1-ethyl-2-fluoropyridinium tetrafluoroborate (2) and lithium iodide.
REACTION OF 2,3-DIHYDRO-2,3-EPOXY-1,4-NAPHTHOQUINONE WITH ALLYLTRIBUTYLTIN. DIRECT ALLYLATION OF EPOXYQUINONE NUCLEUS
Authors: Maruyama Kazuhiro , Naruta Yoshinori 
Published: July 2006

Abstract
2-Alkyl-2,3-dihydro-2,3-epoxy-1,4-naphthoquinone reacted with allyltributyltin and stereo- and regiospecific allylation of its carbonyl was attained giving 3-alkyl-1-allyl-2,3-epoxy-4-oxo-1,2,3,4-tetrahydro-1-naphthol.
PHOTOELECTROCHEMICAL STUDY ON CHLOROPHYLL MONOLAYER ELECTRODES
Authors: Watanabe Tadashi , Miyasaka Tsutomu , Fujishima Akira , Honda Kenichi 
Published: July 2006

Abstract
Anodic photocurrents and negative photovoltages were observed upon irradiation to chlorophyll (Chl) a and b monolayers deposited on SnO2 optically transparent electrodes in an electrochemical cell. Photocurrent quantum efficiency was measured with Chl a-stearic acid mixed monolayers and a highest value of 12–16 % was attained.
MANGANESE PHTHALOCYANINE AS A MODEL OF TRYPTOPHAN-2,3-DIOXYGENASE
Authors: Uchida Kiyoshi , Soma Mitsuyuki , Naito Shuichi , Onishi Takaharu , Tamaru Kenzi 
Published: July 2006

Abstract
High catalytic activity of manganese phthalocyanine, as a model of tryptophan-2,3-dioxygenase, for the oxygenation of 3-methylindole was demonstrated. The substrate specificity for the oxygenation of indole derivatives is markedly different from that by singlet oxygen or radical autoxidation. A reaction mechanism is proposed taking the intimate correlation between the substrate specificity and the electronic spectra of the catalyst–substrate mixture into account.
CARTHAMIN AND ISOCARTHAMIN
Authors: Obara Heitaro , Onodera Jun-ichi 
Published: July 2006

Abstract
Carthamin and isocarthamin, the red pigments of the flowers of Safflower, have been reported hitherto as tautomers. As a result of the reexamination of the relation between the pigments it was found that carthamin is not a tautomer of isocarthamin but pyridine salt of the isocarthamin.
STUDIES ON KETENE AND ITS DERIVATIVES (XCI) REACTION OF DIKETENE WITH ACYL AZIDES
Authors: Kato Tetsuzo , Suzuki Yuji , Sato Masayuki 
Published: July 2006

Abstract
Photoreaction of diketene with benzoyl azide (1a) gave 1-benzoyl-4-hydroxy-3-pyrrolin-2-one (2a). Similarly, diketene reacted with p-anisoyl azide (1b), p-chlorobenzoyl azide (1c), and p-toluoyl azide (1d) to give the corresponding 1-aroyl-4-hydroxy-3-pyrrolin-2-ones (2b,c and d).