bluuebunny/crossref_metadata_2025_split huggingface dataset:
NEW SYNTHESIS OF (±)-SEMPERVIROL
Authors: Matsumoto Takashi , Usui Shuji , Fukui Kenji 
Published: July 2006

Abstract
The new synthesis of (±)-sempervirol (I) was described. Condensation of β-cyclocitral (II) with 4-isopropyl-3-methoxybenzyl chloride (XII) gave an alcohol (XIII), which by oxidation and subsequent intramolecular cyclization gave trans- and cis-fused 6-oxo compounds (XV and XVI). Both XV and XVI were respectively converted into (±)-I.
HETERA-p-CARBOPHANES. VII. MINOR IMPORTANCE OF THE RING CURRENT EFFECT ON CARBON-13 CHEMICAL SHIFTS OF THE ANSA CARBONS IN DIOXADIOXO[n]PARACYCLOPHANES
Authors: Sakamoto Kazuhiko , Oki Michinori 
Published: July 2006

Abstract
13C NMR spectra of a series of dioxadioxo[n]paracyclophanes are observed to compare with those of open-chain analogs. The ring current effect of the benzene ring is found to be of minor importance in determining the chemical shifts of the carbons in the ansa chain.
THERMAL RACEMIZATION OF VARIOUS S-O-ANISYL S-PHENYL N-(SUBSTITUTED)SULFILIMINES
Authors: Moriyama Masaru , Furukawa Naomichi , Numata Tatsuo , Oae Shigeru 
Published: July 2006

Abstract
Small electronic effects were discernible for rates of thermal racemization of various S-o-anisyl S-phenyl N-(substituted)sulfilimines. The rate was retarded by the electron-withdrawing group on the nitrogen atom. A correlation was found further between the rate and the streching frequency ( νS-N).
REACTIONS OF OXOSULFONIUM YLIDES WITH KETENES. THE FORMATION OF ENOL-LACTONES AND DIHYDROFURANONES
Authors: Tsuruoka Hideki , Kasai Shigeaki , Takebayashi Matsuji , Ibata Toshikazu 
Published: July 2006

Abstract
The reaction of diphenyloxosulfonium p-methoxyphenacylide with dialkyl- or alkylaryl-ketenes gave enol-lactones in good yields, whereas the reaction of diphenyloxosulfonium phenacylide with diarylketenes led to dihydrofuranones besides the enol-lactones.
INFRARED SPECTRA OF CARBON MONOXIDE CHEMISORBED ON SUPPORTED PLATINUM AGGREGATES PREPARED FROM Pt CARBONYL CLUSTER COMPOUNDS
Authors: Ichikawa Masaru 
Published: July 2006

Abstract
Supported Pt aggregates have been prepared by pyrolysis of Pt15–Pt6 carbonyl cluster compounds highly dispersed on SiO2 gel and γ-Al2O3, which showed the characteristic carbonyl ir spectra in CO chemisorption.
PERIPHERAL CONJUGATE SYSTEMS 1. CYCLOADDITION OF INDOLIZINE TO ELECTRON-DEFICIENT OLEFIN
Authors: Ikeda Sigehiko , Kajigaeshi Shoji , Kanemasa Shuji 
Published: July 2006

Abstract
Indolizines reacted with esters of maleic and acrylic acid to give 1,2,5,7a-tetrahydropyrrolo[2,1,5-cd]indolizine derivatives which would be presumably derived from [8+2] cycloaddition and subsequent 1,5-hydrogen shift, while with maleimide and maleic anhydride were obtained Michael adducts as main products. The stereochemistry and mechanism of the reactions were also discussed.
SYNTHESIS OF UNSYMMETRICAL KETONES BY THE REDUCTION OF 2-ALKOXYPYRIDINIUM SALTS FORMED FROM α-HYDROXY KETONES (ACYLOINS) WITH SODIUM HYDROSULFITE
Authors: Wada Makoto , Imaoka Masanori , Mukaiyama Teruaki 
Published: July 2006

Abstract
α-Hydroxy ketones (acyloins) were reduced to the corresponding ketones in good yields via pyridinium salts by the successive treatment with 1-methyl-2-fluoropyridinium p-toluenesulfonate and sodium hydrosulfite.
RAPID RACEMIZATION OF THE RADICAL ANIONS OF 1,1′-BINAPHTHYL AND 9,10-DIHYDRO-3,4;5,6-DIBENZOPHENANTHRENE
Authors: Ito Osamu , Hatano Masahiro 
Published: July 2006

Abstract
The radical anions of 1,1′-binaphthyl and 9,10-dihydro-3,4;5,6-dibenzophenanthrene racemize more rapidly than the corresponding neutral compounds without cleavage of the 1,1′ bond.
PRODUCTION OF 61Cu BY α- AND 3He BOMBARDMENTS ON COBALT TARGET
Authors: Homma Yoshio , Murakami Yukio 
Published: July 2006

Abstract
For the production of 61Cu for medical use, natural cobalt was bombarded with α or 3He particles up to 40 MeV. The best bombardment conditions were determined on detailed examination of the excitation curves and thick-target yield curves for 61Cu and the by-product nuclides. 6 mCi/μAh of 61Cu could be obtained by bombardment with 40 MeV α particle and separated by anion exchange method with high radiochemical purity in carrier-free state.
DETECTION OF MOLECULAR IONS OF THERMALLY UNSTABLE COMPOUNDS BY IN BEAM ELECTRON IMPACT
Authors: Ohashi Mamoru , Tsujimoto Kazuo , Yasuda Akiyoshi 
Published: July 2006

Abstract
Some remarkable characteristics of “in beam” electron impact spectra of several thermally unstable compounds have been reported. The spectra almost always exhibited the M+1 peak in place of M. Intensities of M+1 peaks of several thermally unstable compounds, of which molecular ion peaks are not observed with conventional direct inlet systems, are reported.
METAL-ASSISTED TERPENOID SYNTHESIS II. CATALYTIC CONVERSION OF ISOPRENE INTO FARNESENE AND ITS ISOMER, 2,6-DIMETHYL-10-METHYLENE-1,6-TRANS,11-DODECATRIENE
Authors: Akutagawa Susumu , Taketomi Takanao , Otsuka Sei 
Published: July 2006

Abstract
A highly selective isoprene trimerization to 2,6-dimethyl-10-methylene-1,6-trans,11-dodecatriene(1) and its double bond isomer, natural β-trans-farnesene (2) was achieved with nickel catalysts. The hydrogen migration pathway crucial for the regio- and stereoselective linear oligomerization was studied to derive a plausible reaction scheme.
METAL COMPLEXES OF SULFHYDRYL-CONTAINING PEPTIDES : NICKEL(II) COMPLEX OF 2-MERCAPTOPROPIONYLGLYCINAMIDE IN COMPARISON WITH 2-MERCAPTOPROPIONYLGLYCINE
Authors: Sugiura Yukio , Takeyama Toshiko , Tanaka Hisashi 
Published: July 2006

Abstract
The pKc1 (7.40) and pKc2 (8.04) values for deprotonation of the peptide and terminal amide groups in the 1:1 2-mercaptopropionylglycinamide(2-MPGA)-Ni(II) complex were determined. In the 1H NMR spectrum of 2-MPGA-Ni(II) complex, the methylene protons of the ligand were observed as two signals at 3.96 and 3.31 ppm. The result suggests that two protons of the methylene group are in different environment which is induced by the fused-chelate ring formation.
UNEQUIVOCAL SIGNAL ASSIGNMENT OF THE 13C NMR SPECTRUM OF 4-HOMOISOTWISTANE AS PROBED BY DEUTERIUM SUBSTITUTIONS
Authors: Fujikura Yoshiaki , Aigami Koji , Takaishi Naotake , Ikeda Hiroshi , Inamoto Yoshiaki 
Published: July 2006

Abstract
Isotope shifts as well as geminal and vicinal couplings with the deuterium atom were clearly observed in the 13C NMR spectrum of tricyclo[5.3.1.03,8]undecane-2-d1 (2 and 3) and -3-d1 (4). The phenomena made possible an unambiguous signal assignment in the spectrum of the undeuterated hydrocarbon (1) that had been impracticable so far.
CATIONIC PALLADIUM AND PLATINUM COMPLEXES OF BIDENTATE PHOSPHORUS YLIDE LIGANDS
Authors: Kato Masao , Urabe Hiroshi , Oosawa Yoshinao , Saito Taro , Sasaki Yukiyoshi 
Published: July 2006

Abstract
Cationic complexes of bidentate phosphorus ylide ligands, benzoylmethylenediphenyl-2-diphenylphosphinoethylphosphorane(BDEP) and benzoylmethylenediphenyldiphenylphosphinomethylphosphorane (BDMP) [MCl(L)PR3]+BPh4− and neutral complexes MX2(L) (M = Pd or Pt ; L = BDEP or BDMP ; R = Ph or Cy ; X = Br, I, or SCN) have been synthesized and characterized.
REACTIONS OF SEVERAL NUCLEOPHILES WITH QUATERNARY SALTS OF NICOTINAMIDE
Authors: Minato Hiroshi , Yamazaki Eiji , Kobayashi Michio 
Published: July 2006

Abstract
Reactions between 1-benzyl-3-carbamoylpyridinium chloride(1) and several nucleophiles were investigated by use of 13C-NMR spectroscopy.The reaction with OH\ominus in EtOH–H2O yielded a trimer of the deprotonated 1, and the positions 4 and 6 were the ring-connecting sites. The MeO in MeOH removed a benzyl proton, and yielded an N-ylide. The meS\ominus in H2O added -at the position 4. The reaction with HgO and Et2NH resulted in the oxidation at the position 2, yielding a pyridone.
REACTIVITY PATTERN OF ARYL RADICALS TOWARD BENZENE AND NITROSODURENE. TRAPPING OF CYCLOHEXADIENYL RADICALS BY NITROSODURENE
Authors: Suehiro Tadashi , Kamimori Mariko , Tokumaru Katsumi , Yoshida Masayuki 
Published: July 2006

Abstract
Thermal decompositions of arylazotriphenylmethanes in benzene solution in the presence of nitrosodurene afforded either arylcyclohexadienyl duryl nitroxides or aryl duryl nitroxides depending upon whether the substituents on aryl radicals were electron withdrawing or electron donating. These results reflect the different reactivities of aryl radicals toward benzene nucleus.
NEW CROSS-ALDOL REACTION Via VINYLOXYBORANES
Authors: Mukaiyama Teruaki , Inoue Tan 
Published: July 2006

Abstract
A new synthesis of cross-aldols from two different carbonyl compounds by using di-n-butylboryl trifluoromethanesulfonate and tertiary amine is described. In the case of methyl ketones, the reaction takes place in regiospecific manner to afford the corresponding aldols in good yields.
BETAINE AS AN EFFECTIVE ACID CAPTOR: A CONVENIENT METHOD FOR THE SYNTHESIS OF CARBOXAMIDES
Authors: Mukaiyama Teruaki , Aikawa Yukiko , Kobayashi Susumu 
Published: July 2006

Abstract
The equimolar reactions of carboxylic acids and amines with 1-methyl-2-fluoro or 2-chloropyridinium salt by the successive use of 1 mol of tri-n-butylamine and the betaine, (3,4-dihydro-2H-pyrido[1,2-a]pyrimidin-2-one (I)), afforded the corresponding carboxamides in good yields.
MOLECULAR ASYMMETRY INDUCED BY UNSATURATED ADDITIVES IN THE ENANTIOSELECTIVE DEHYDROGENATION OF RACEMIC 1-PHENYLETHANOL BY RuCl2(PPh3)3 AND (+)-NEOMENTHYLDIPHENYLPHOSPHINE
Authors: Ohkubo Katsutoshi , Hirata Keiichi , Yoshinaga Kohji 
Published: July 2006

Abstract
Several unsaturated additives enhanced the enantioselective ability of a catalytic system of RuCl2(PPh3)3 and (+)-neomenthyldiphenylphosphine in dehydrogenation of racemic 1-phenylethanol through the chirality induced by their coordination to the complex.
REDUCTION OF UNSATURATED CARBON–CARBON BONDS BY MEANS OF IRON CHLORIDE-SODIUM HYDRIDE SYSTEM
Authors: Fujisawa Tamotsu , Sugimoto Kikuo , Ohta Hiromichi 
Published: July 2006

Abstract
The reagent consisting of iron(II or III) chloride and sodium hydride in tetrahydrofuran was found to reduce both carbonyl and olefin bonds in an enone. Olefins and acetylenes were also hydrogenated by the reagent giving the corresponding saturated hydrocarbons under mild conditions.
REACTION OF PYRIDINIUM YLIDES WITH DIETHYL AZODICARBOXYLATE—A FACILE SYNTHESIS OF Δ2-1,3,4-OXADIAZOLINES—
Authors: Mukaiyama Teruaki , Atsumi Kunio , Takeda Takeshi 
Published: July 2006

Abstract
The pyridinium ylides, derived from 1-(2-oxoalkyl)pyridinium salts, reacted with diethyl azodicarboxylate to give Δ2-1,3,4-oxadiazolines, which isomerized to α-[N,N′-bis(ethoxycarbonyl)hydrazino]-α,β-unsaturated carbonyl compounds on treatment with acid such as trifluoromethanesulfonic acid.
SURFACE COMPOSITION OF THE SCALE ON Ni–Cu ALLOY FORMED IN NITRIC OXIDE
Authors: Takasu Yoshio , Matsuda Yoshiharu , Maru Shun-ichi , Yokota Setsuaki , Moronuki Yoshio 
Published: July 2006

Abstract
X-ray photoelectron spectroscopy(ESCA) and Auger electron spectroscopy(AES) were adopted for an examination of the surface composition of scale on Ni–Cu alloy(64%Ni) formed in nitric oxide at 700°C. The surface layer of the scale was mainly composed of NiO caused by preferential oxidation of nickel in the alloy by nitric oxide.
DIELECTRIC BEHAVIOR OF 1-PROPANOL IN A VARIETY OF HYDROGEN-BONDING SOLVENTS
Authors: Sato Hiroshi , Takahashi Hiroaki , Higasi Keniti 
Published: July 2006

Abstract
The dependence of the principal relaxation time of 1-propanol upon hydrogen-bonding solvent has been carefully studied by use of water and four ketones as solvent. It was found that the molecular weight of the hydrogen-bonding solvent is fairly important in the solvent effect.
THE SYNTHESIS OF SOLID SUPER ACIDS AND THE ACTIVITY FOR THE REACTIONS OF BUTANE AND ISOBUTANE
Authors: Tanabe Kozo , Hattori Hideshi 
Published: July 2006

Abstract
Solid super acids such as SbF5–TiO2–SiO2, SbF5–TiO2, and SbF5–SiO2–Al2O3 were synthesized, whose acid strengths were in the range of −13.16≥H0&gt;−14.52. A SbF5–TiO2–SiO2 showed the highest activity for the reaction of butane at room temperature. A SbF5–TiO2 was highly selective for the skeletal isomerization of butane, where 72 % of the products was isobutane.
REACTION OF TETRASULFUR TETRANITRIDE (N4S4) WITH HYDRAZINES AND HYDRAZONES
Authors: Tashiro Masashi , Mataka Shuntaro 
Published: July 2006

Abstract
The reaction of N4S4 with benzoyl- (1a) and 1-methyl-1-phenylhydrazine (1b), benzophenone- (2a) and fluorenone hydrazone (2b) was carried out in refluxing benzene (1a and 1b) or toluene (2a and 2b) and N4S4 was found to behave as a N–N bond cleaving reagent for 1b, while both a N–N bond cleaving and an oxidizing reagent for 1a and 2. The reaction mechanism was briefly mentioned.
FORMATION OF DIPHENYL(9-PHENYL-10-ANTHRYL)METHYL, A POSTULATED INTERMEDIATE OF THE SIDE-CHAIN OXIDATION OF 9-BENZHYDRYL-10-PHENYLANTHRACENE, FROM 9,10-BNZHYDRYL-10-PHENYL-9,10-EPIDIOXYANTHRACENE IN LIQUID SULFUR DIOXIDE
Authors: Nojima Masatomo , Nagao Gensai , Tokura Niichiro 
Published: July 2006

Abstract
By dissolving 9,10-dihydro-9-benzhydryl-10-phenyl-9,10-epidioxyanthracene in liquid sulfur dioxide, diphenyl(9-phenyl-10-anthryl)methyl was obtained, which was conveniently oxidized to diphenyl(9-phenyl-10-anthryl)methyl cation by introducing oxygen into this solution , and after treatment with ethanol 9-ethoxy-9-phenyl-10-diphenylmethylene-9,10-dihydroanthracene was isolated.
NATURE OF THE EXCITED STATES OF 2-NAPHTHOL AND 1-ANTHROL HYDROGEN BONDED WITH PYRIDINE
Authors: Yamamoto Sada-aki , Kikuchi Koichi , Kokubun Hiroshi 
Published: July 2006

Abstract
The transient absorption spectra were observed for 2-naphthol and 1-anthrol in pyridine upon sensitization by suitable triplet energy donors. No transient was produced by direct excitation. The intersystem crossing process is not the deactivation pathway of the singlet excited species hydrogen bonded with pyridine.
THE REACTION OF TRICYCLO [6.2.0.03,6]DECA-1,3(6)4,7,9-PENTAENE WITH BENZOYL PEROXIDE AND AZOISOBUTYRONITRILE TO AFFORD A NEW QUINODIMETHANE, TRICYCLO [6.2.0.03,6]DECA-2,5,7,10-TETRANE
Authors: Toda Fumio , Tanaka Koichi , Yoshioka Takayuki 
Published: July 2006

Abstract
Benzoyl peroxide easily added to 2,7-di-tert-butyl-4,5,9,10-tetraphenyltricyclo[6.2.0.03,6 deca-1,3(6)4,7,9-pentaene (1a) and its tetrabromo derivative (1b), affording new quinodimethanes, 4,9-dibenzoyloxy-2,7-di-tert-butyl-4,5,9,10-tetraphenyltricyclo[6.2.0.03,6]deca-2,5,7,10-tetraene (2a) and its tetrabromo derivative (2b), respectively. Similarly the reactions of 1a and 1b with asoisobutyronitrile afforded 4,9-di(1-cyano-1-methylethyl)-analogs of 2a (3a) and 2b (3b), respectively.
HEPTAFLUORO-1-METHYLETHYL PHENYL KETONE—A NEW BENZOYLATING AGENT
Authors: Ishikawa Nobuo , Shin-ya Seiji 
Published: July 2006

Abstract
A mixture of heptafluoro-1-methylethyl phenyl ketone (1) and N,N,N′,N′-tetramethylethylenediamine was found to be a facile benzoylating agent, providing O-, N-, and C-benzoyl compounds. The characteristic reactivity of the heptafluoro-1-methylethyl ketone was compared with that of trifluoromethyl and pentafluoroethyl ketones.
A NEW REAGENT, Zn–ZnCl2-ROH, FOR THE HYDROGENATION OF CONJUGATED DOUBLE BOND
Authors: Toda Fomio , Iida Kunio 
Published: July 2006

Abstract
Not only the double bond placed between two carbonyl or cyano groups but also the double bonds of indenone and cyclopentadienone were easily hydrogenated by heating with Zn–ZnCl2-ROH.
REDUCTION BY A MODEL OF NAD(P)H. IX. ESR STUDY ON THE BIOMIMETIC REDUCTION OF BENZILS WITH 1-BENZYL-1,4-DIHYDRONICOTINAMIDE
Authors: Ohnishi Yutaka , Ohno Atsuyoshi 
Published: July 2006

Abstract
ESR studies on the biomimetic reduction of benzils by 1-benzyl-1,4-dihydronicotinamide indicate the formation of anion radicals of benzils. In the presence of magnesium perchlorate, the anion radicals are found to coordinate onto the metal ions.
A CONVENIENT METHOD FOR THE PREPARATION OF N-ACYL LACTAMS
Authors: Ishida Akihiko , Bando Takashi , Mukaiyama Teruaki 
Published: July 2006

Abstract
Various N-acyl lactams were prepared in good yields from free carboxylic acids and lactim ethers by employing 1-methyl-2-chloropyridinium iodide as a coupling reagent. Similarly, 1-acyl-3-methyl-4-imidazoline-2-thione or 3-acyl-2-thiazolidinethione was prepared in a fairly good yield from carboxylic acid, and 1-methyl-2-methylthioimidazole or 2-methylthio-2-thiazoline, respectively.
A NEW ROUTE TO ALKYLTROPILIDENES. UNAMBIGUOUS SYNTHESIS OF 3-ALKYL-2,4-DIMETHYLTROPILIDENES
Authors: Takeuchi Ken′ichi , Yasuda Kenji , Okamoto Kunio 
Published: July 2006

Abstract
1-Alkyl-2,7-dimethyl-2,6-cycloheptadienols (IV), easily prepared from 2,7-dimethyl-2,6-cycloheptadienone (III) and alkyllithiums, are dehydrated by boric acid to give the corresponding 3-alkyl-2,4-dimethyltropilidenes (II) in good yields. The route provides an unambiguous synthesis of II.
INTERMEDIATE OF THE HYDROGENATION OF BUTADIENE ON A MoS2 CATALYST
Authors: Okuhara Toshio , Kondo Toshihiko , Tanaka Ken-ichi 
Published: July 2006

Abstract
Adsorbed iso-butenyl (σ-allyl) is formed on MoS2 catalyst during the hydrogenation of butadiene, and is the intermeidate of hydrogen exchange reaction of butadiene as well as of the hydrogenation of butadiene. The σ-allyl species formed on the active sites do not isomerize to π-allyl form so that the reaction of butadiene with a mixture of H2 and D2 gives do-1-butene and d2-1-butene with few d1-1-butene, indicating high conservation of hydrogen molecular identity in the products.
A FACILE SYNTHESIS OF CARBOXYLIC THIOL ESTERS FROM CARBOXYLIC ACIDS AND THIOLS
Authors: Watanabe Yutaka , Shoda Shin-ichiro , Mukaiyama Teruaki 
Published: July 2006

Abstract
Various thiol esters are prepared in good yields by the reaction of thiols with acyloxypyridinium salts formed in situ from free carboxylic acids and 2-fluoro-1-methylpyridinium p-toluenesulfonate.
EFFECTS OF IMPURITIES ON THE IRRADIATION-INDUCED LATTICE DISTORTION IN YTTRIUM NIOBATE (YNbO4)
Authors: Kenjo Tadao , Yajima Seishi 
Published: July 2006

Abstract
When the YNbO4 compounds containing various impurities were exposed to the fast-neutron dose, they underwent lattice-distortion to be high-temperature values in the lattice parameters; their monoclinic lattice parameters changed to smaller values in the tetragonality(a/c) in the b plane and to greater values in sinft. The degree of the structural change increases with increasing value in the concentration of CaO subtracted by that of ZrO2 contained.
SPECTROPHOTOMETRIC DETERMINATION OF IRON(III) AND VANADIUM(V) BASED ON THE SOLUBILIZATION OF THEIR 8-QUINOLINATES BY SODIUM DODECYL SULFATE
Authors: Kodama Michiko , Tominaga Takehiko 
Published: July 2006

Abstract
8-Quinolinol complexes of iron(III) or vanadium(\={V}) are made water soluble in the presence of enough sodium dodecyl sulfate (SDS) to form the micelle and each of the solubilized complexes shows stable coloration for at least 2–3 days. This observation provided a basis for the simultaneous determination of microgram quantities of iron(III) and vanadium(\={V}) without either solvent extraction or masking agents.
UNUSUALLY STRONG BASIC SITES AS ACTIVE SITES FOR CIS–TRANS INTERCONVERSION OF 2-BUTENE ON CaO
Authors: Iizuka Tokio , Endo Yusuke , Hattori Hideshi , Tanabe Kozo 
Published: July 2006

Abstract
A good correlation was found between the amount of NO22− formed by adsorption of NO on CaO and the rate of cis–trans interconversion of 2-butene. The cis–trans isomerization which occurred very rapidly over CaO evacuated at 700–900°C was inhibited by adsorption of NO, whereas the double bond isomerization was not. Active sites for the cis–trans interconversion was ascribed to unusually strong basic sites.
STRUCTURE OF AQUOBISCYCLO(l-HISTIDYL-l-HISTIDYL)DICOPPER(II) PERCHLORATE COMPLEX
Authors: Kojima Yoshitane , Hirotsu Ken , Matsumoto Keiji 
Published: July 2006

Abstract
The crystal structure of the title complex, [H2O Cu2(C12H13N6O2)2](ClO4)2·3.5H2O, was determined from X-ray diffraction data. The unit cell contains two independent complex cations which have similar structures. The complex cation consists of a dimer in which one Cu atom is pseudo tetrahedral and the other one distorted square pyramidal.
PREPARATION OF CARBODIIMIDES FROM THIOUREAS USING ORGANOLITHIUM OR ORGANOMAGNESIUM COMPOUND
Authors: Sakai Shizuyoshi , Fujinami Tatsuo , Otani Noboru , Aizawa Toshiyuki 
Published: July 2006

Abstract
Thermal decomposition of N,N’-dilithio- or bis(bromomagnesio)thioureas, prepared in situ from the thioureas substituted by bulky groups and butyllithium or bromoethylmagnesium, at 170–200°C under vacuum afforded dialkyl- or diaryl-carbodiimides in 33–61% yields. However, the decomposition of N,N’-dilithiothioureas was accelerated by the addition of carbon disulfide, and the carbodiimides were formed below room temperature in 67–87% yields.
PHOSPHINYL- AND PHOSPHINOTHIOYLAMINO ACIDS AND PEPTIDES. I. PREPARATION OF DIPHENYLPHOSPHINOTHIOYL(Ppt)-AMINO ACIDS
Authors: Ueki Masaaki , Ikeda Shigeru 
Published: July 2006

Abstract
Diphenylphosphinothioyl(Ppt)-amino acids were prepared under the Schotten-Baumann conditions by use of diphenylphosphinothioyl chloride (Ppt–Cl). Ppt group is cleaved about 4 times faster than t-butyloxycarbonyl group. Ppt causes no steric hindrance and no racemization.
ESR STUDY OF VANADYL CHELATES IN CARBONACEOUS MESOPHASE
Authors: Yamada Yoshio , Sohma Junkichi , Ouchi Koji , Sanada Yuzo 
Published: July 2006

Abstract
Behavior and arrangement of Gachsaran residue in the magnetic field during the carbonization process were investigated through the ESR spectra from spin-probes of the vanadyl porphyrin chelates. The results show that some of the chelates are incorporated into formed mesophase and that the molecular plane is oriented parallel to the field.
REACTIONS OF 2,2-DIMETHYL-1-(P-TOLUENESULFONYLIMINO)THIOCHROMAN WITH NUCLEOPHILES SUCH AS THIOLS, AMINES, AND GRIGNARD REAGENTS
Authors: Murase Masao , Kitano Masahiko , Kise Masahiro , Murai Hiromu 
Published: July 2006

Abstract
The reactions of 2,2-dimethyl-1-(p-toluenesulfonylimino)thiochroman (1) with nucleophiles such as thiols, amines, and Grignard reagents give the sulfenic acid derivatives. The mechanisms of these reactions are discussed.
CATALYTIC FIXATION OF CARBON DIOXIDE TO FORMIC ACID BY TRANSITION-METAL COMPLEXES UNDER MILD CONDITIONS
Authors: Inoue Yoshio , Izumida Hitoshi , Sasaki Yoshiyuki , Hashimoto Harukichi 
Published: July 2006

Abstract
Formic acid was catalytically synthesized from carbon dioxide and hydrogen by a combination of group VIII transition-metal complexes and bases in the presence of water far less than the equivalent amount of the catalyst.
ORGANO-MODIFIED METAL OXIDE ELECTRODE. I. STUDIES OF MODIFIED LAYER BY CAPACITANCE MEASUREMENTS AND ESCA
Authors: Fujihira Masamichi , Matsue Tomokazu , Osa Tetsuo 
Published: July 2006

Abstract
The successive chemical modifications of silanized tin oxide electrodes to the more complicated compounds have been investigated. ESCA and electrochemical techniques were employed for characterization of the organo-modified surfaces. Understanding of the semiconductor electrode-solution interfaces has been greatly advanced by the capacitance measurements of the modified electrodes.
THERMAL ADDITION REACTION OF CYCLOHEPTATRIENE WITH 1,4-NAPHTHOQUINONE: AN EXPERIMENTAL EVIDENCE ON THE MECHANISM OF vic-DITROPYLATION TO QUINONES
Authors: Takeshita Hitoshi , Mametsuka Hiroaki , Mori Akira 
Published: July 2006

Abstract
Thermal reaction of cycloheptatriene with 1,4-naphthoquinone produced 2-(7-tropyl)-2,3-dihydro-1,4-naphthoquinone and a dimeric 2:2-adduct in addition to the similar types of adducts with some p-benzoquinones. An experimental support for the previously suggested mechanism on the vic-ditropylation process was obtained by a further conversion of isolated intermediates.