bluuebunny/crossref_metadata_2025 huggingface dataset:
CIRCULAR DICHROISM STUDIES OF DIMERIC FUNGAL PIGMENTS,(−)-LUTEOSKYRIN AND (+)-RUGULOSIN
Authors: Harada Nobuyuki , Suzuki Shukuko , Uda Hisashi , Nakanishi Koji
Published: July 2006

The c.d. curves of (−)-luteoskyrin and (+)-rugulosin, as calculated on the basis of an electric dipole-electric dipole coupling mechanism, the Aromatic Chirality Method, are in good agreement with experimental curves; the method is thus applicable to complex systems without ambiguity and in an extremely facile manner.
COMPLEX OF GEL-FORMING β-1,3-d-GLUCAN WITH CONGORED IN ALKALINE SOLUTION
Authors: Ogawa Kozo , Tsurugi Jitsuo , Watanabe Takehiko
Published: July 2006

Complex formation of gel-forming β-1,3-d-glucan (‾DPn = 500) with congored in alkaline solution was studied by measurements of visible absorption spectra. Molecular absorption coefficient of the complex at 520 nm was determined to be 2.98×104 per congored and formation constant of the complex, 6.4×105 M−1, in 0.1 N sodium hydroxide solution at 25°C.
HIGH RESOLUTION NMR MEASUREMENT UNDER HIGH PRESSURE AND PRESSURE DEPENDENCE OF THE PROTON CHEMICAL SHIFTS
Authors: Yamada Hiroaki
Published: July 2006

The high resolution proton nmr spectra of a liquid sample under the pressures up to 1650 atm. were obtained at room temperature on an ordinary 60 MHz high resolution spectrometer. Explanation of the handy-type equipment for the experiment and some observations on the pressure dependence of chemical shifts were reported.
THE THERMOLYSIS OF THIANAPHTHENEQUINONE
Authors: Tsuge Otohiko , Tashiro Masashi , Kanemasa Shuji , Takasaki Kuniaki
Published: July 2006

Thermolysis of thianaphthenequinone (1) has been investigated under various conditions. At 240–270°C, 1 gave products 3, 4, 5, and 8: the relative yields of these products depended on the pyrolytic conditions. It is suggested that 1 is thermally decomposed to form thioacyl ketene intermediate 2.
THE OXIDATION OF CUMENE CATALYZED BY METAL POLYPHTHALOCYANINES
Authors: Hara Takao , Ohkatsu Yasukazu , Osa Tetsuo
Published: July 2006

The oxidation of cumene was carried out using metal polyphthalocyanine as a catalyst. The catalyst activated an oxygen molecule to form a phthalocyanine-O2 complex, which abstracted the tertiary hydrogen of cumene to initiate the reaction. The catalyst had no activities on the decomposition of cumene hydroperoxide, formed selectively in the oxidation of cumene. The influence of the addition of pyridine was discussed.
ASYMMETRIC REDUCTION OF KETONES WITH A CATIONIC CHIRAL PHOSPHINE RHODIUM COMPLEX CATALYST
Authors: Tanaka Masato , Watanabe Yoshihisa , Mitsudo Take-aki , Iwane Hiroshi , Takegami Yoshinobu
Published: July 2006

Methyl ethyl ketone, pinacoline and acetophenone are reduced asymmetrically to the corresponding alcohols with a chiral phosphine rhodium complex catalyst, [Rh(NBD) {(R)-PEtMePh}2]+PF6− (NBD = 2,5-norbornadiene).
A REFINED DEBYE–HÜCKEL THEORY AND ION ASSOCIATION
Authors: Yokoyama Haruhiko , Yamatera Hideo
Published: July 2006

The Debye–Hückel theory of electrolyte solutions was re-examined to explain ion association. At infinite dilution, a more exact expression was derived for the chemical potential of a symmetrical electrolyte, and was related to the ion-association constant. From measured vapor pressure depressions of electrolyte solutions, log K values were obtained to be 2.11, 2.15, 2.26, and 1.67 for MgSO4, CaSO4, MnSO4, and [Ru(phen)3]SO4, respectively.
PALLADIUM(II) CATALYZED SYNTHESIS OF ARYL CYANIDES FROM ARYL HALIDES
Authors: Takagi Kentaro , Okamoto Tadashi , Sakakibara Yasumasa , Oka Shinzaburo
Published: July 2006

In the presence of Pd(II) salts, substitution reaction of aryl halides with potassium cyanide occurs readily which affords a simple and beneficial method for aryl cyanide synthesis.
IONIZATION POTENTIALS OF TRIFLUOROMETHYL AND METHYL HALIDES BY PHOTOELECTRON SPECTROSCOPY AND CALCULATIONS BY EXTENDED HÜCKEL AND CNDO/2 METHODS
Authors: Uehara Yoichi , Saito Naoshi , Yonezawa Teijiro
Published: July 2006

Ionization potentials and electron affinities of trifluoromethyl and methyl halides calculated by EHMO and CNDO/2 were compared with the observed values obtained from photoelectron spectroscopy. The former calculation provides a good agreement for the occupied orbitals, while the latter explains nearly the entire system.
STEREOCHEMISTRY OF THE 2,4-DIMETHYL-1,3-DIOXOLAN-2-YL RADICAL
Authors: Kobayashi Shigero O , Simamura Osamu
Published: July 2006

The acetone-initiated photochemical addition of cis- or trans-2,4-dimethyl-1,3-dioxolane to methyl acrylate at −78°C leads to a mixture of geometrically isomeric methyl 3-(2,4-dimethyl-1,3-dioxolan-2-yl)propionates with partial retention of the original configuration of the starting dioxolane. This constitutes evidence for a pyramidal structure of the radical centre of 1,3-dioxolan-2-yl radicals involved as an intermediate in the photochemical addition.
REACTIONS OF SULFONIUM PHENACYLIDE WITH ACTIVE METHYLENE COMPOUNDS
Authors: Harigaya Yasuji , Yamamoto Tamotsu , Okawara Makoto
Published: July 2006

The reaction of dimethylsulfonium phenacylide 1 with malononitrile gave C-phenacylated compound. The reaction of 1 with acetylacetone or ethyl acetoacetate led to dihydrofuran derivatives via O-phenacylation followed by cyclization.
THE REACTION OF TRIMETHYLSILYL SULFIDES WITH α,β-UNSATURATED ACETALS. A CONVENIENT METHOD FOR THE PREPARATION OF γ-ALKOXYALLYL SULFIDES
Authors: Mukaiyama Teruaki , Takeda Takeshi , Atsumi Kunio
Published: July 2006

In the presence of AlCl3, trimethylsilyl sulfides react with α,β-unsaturated acetals to give γ-alkoxyallyl sulfides in good yields.
THE RAMAN SPECTRA OF ADSORBED MOLECULES ON POROUS VYCOR GLASS
Authors: Nagasao Tsutomu , Yamada Haruka
Published: July 2006

The Raman spectra of pyridine, triethylamine, dimethylsulfoxide and maleic anhydride adsorbed on porous Vycor glass were measured and compared with results on other silicas. The spectral changes upon adsorption are interpreted to be due to the hydrogen bond formation with the surface OH groups.
THE ABSOLUTE CONFIGURATIONS OF [8][8], [8][10]PARACYCLOPHANES AND RELATED PARACYCLOPHANE COMPOUNDS
Authors: Yamamoto Koji , Nakazaki Masao
Published: July 2006

Starting from (+)-[8]paracyclophane-10-carboxylic acid optically active [8][8]paracyclophane was prepared and its absolute configuration was correlated to (S)-(+)-[2.2]paracyclophane-4-carboxylic acid. The absolute configurations of (−)-[8][10]paracyclophane and related optically active paracyclophanes were also discussed.
MÖSSBAUER EFFECT OF 119Sn IN THE THERMAL DECOMPOSITION PRODUCTS OF TIN(IV) SELENIDE AND TIN(IV) SELENOSULFIDE
Authors: Ichiba Sumio , Katada Motomi , Negita Hisao
Published: July 2006

The thermal decomposition products of SnSe2 and SnSSe were investigated by Mössbauer effect. No intermediate decomposition product was found. Tin(IV) selenosulfide decomposes to tin(II) selenosulfide, which is an isomorphous compound of SnS and SnSe.
A FACILE SYNTHESIS OF N-(p-TOLUENESULFONYL)-2-OXOALKANECARBOXAMIDES BY THE REACTION OF SILYL ENOL ETHERS WITH p-TOLUENESULFONYL ISOCYANATE
Authors: Ojima Iwao , Inaba Shin-ichi , Nagai Yoichiro
Published: July 2006

It was found that silyl enol ethers reacted with p-toluenesulfonyl isocyanate to afford either N-sulfonyl-2-silyloxycycloalkanecarboxamides or N-sulfonyl-4-silyloxy-2-azetidinones. Both adducts were easily hydrolyzed to the corresponding N-sulfonyl-2-oxoalkanecarboxamides.
EVIDENCE FOR THE HYDROPHOBIC INTERACTION IN PFEIFFER EFFECT OF TRIS(1,10-PHENANTHROLINE)ZINC(II)-l-STRYCHNINE SYSTEM
Authors: Miyoshi Katsuhiko , Sakata Koro , Yoneda Hayami
Published: July 2006

The addition of tetraalkylammonium bromides R4NBr(R = C2H5, n-C3H7 and n-C4H9) did not enhance Pfeiffer effect of [Zn(phen)3]2+-l-strychnine system in water, while (CH3)4NBr enhanced it like simple salts. This could be best interpreted by assuming that hydrophobic R4N+ ions interfere with hydrophobic interaction between [Zn(phen)3]2+ and strychnine cation (stryH+), by forming hydrophobic bonding with [Zn(phen)3]2+ and/or stryH+.
CORRELATION BETWEEN THE REACTION OF KETONES WITH ZINC AND THEIR POLAROGRAPHIC HALF-WAVE REDUCTION POTENTIAL
Authors: Asano Tatsuo , Ohkata Katsuo , Hanafusa Terukiyo
Published: July 2006

Correlation between the result on the reaction of ketones with zinc dust in acetic acid and their polarographic half-wave reduction potential in organic solvents is described.
HIGH-SPEED LIQUID CHROMATOGRAPHY OF METAL COMPLEXES
Authors: Yoshikawa Yuzo , Kojima Masaaki , Fujita Miho , Iida Masayasu , Yamatera Hideo
Published: July 2006

The chromatographic separations of several kinds of cobalt (III) and platinum(II) complexes were carried out by high-speed liquid chromatography. Among the geometric isomers of each complex, isomers of higher symmetry were more rapidly eluted. This method was applied to the analysis of reaction mixtures of cis- and trans-[CoCl2(en)2]Cl in methanol and the first-order rate constant of isomerization was determined.
1-O-MESYL DERIVATIVES OF d-GLUCOPYRANOSE AND THEIR APPLICATION TO α-d-GLUCOPYRANOSIDE SYNTHESIS
Authors: Machinami Tomoya , Suami Tetsuo
Published: July 2006

1-O-Mesyl-d-glucopyranose derivatives were synthesized by a reaction between the corresponding α-d-glucopyranosyl bromides and silver methanesulfonate. Alcoholysis of the 1-O-mesyl derivatives was attempted.
THE FORMATION OF CATION RADICAL FROM ANTHRACENE PEROXIDE DERIVATIVES IN LIQUID SULFUR DIOXIDE
Authors: Kakeya Noboru , Nojima Masatomo , Tokura Niichiro
Published: July 2006

A novel formation of a cation radical from anthracene endoperoxide in liquid sulfur dioxide was reported. By the reaction of 9,10-epidioxy-9,10-dimethylanthracene, 9,10-epidioxy-9,10-diphenylanthracene, and 9,10-epidioxy-9-phenylanthracene in liquid sulfur dioxide, the corresponding cation radicals were formed immediately. With the use of catalytic amounts of these peroxides, the flash polymerization of styrene was accomplished in liquid sulfur dioxide.
HYDRODIMERIZATION OF ACRYLONITRILE BY CATHODIC REDUCTION IN LIQUID AMMONIA
Authors: Chiba Toshiro , Takata Yoshiyuki , Suzuki Akira
Published: July 2006

The electrolytic reduction of acrylonitrile using a mercury cathode in liquid airanonia employing ammonium perchlorate as a supporting salt was examined. It was found that acrylonitrile was dimerized to adiponitrile in an excellent yield without significant formation of by-products under such reaction conditions, compared with the usual cathodic reduction in an aqueous solution.
SYNTHESIS OF DIBENZO[d,j]-6,8-BISDEHYDRO[13]ANNULENONE
Authors: Ojima Juro , Yokoyama Yoji , Yokoyama Tai
Published: July 2006

An annelated[13]annulenone (3) was prepared starting from o-ethynylbenzaldehyde 1 in order to examine the effect of annelation on the ring current of the inner thirteen membered ring. It was found that two benzene rings reduce a paramagnetic ring current arising from polarization of a carbonyl group in the inner ring.
CHEMISTRY OF NITROSOIMINES. VIII. REACTIONS OF 3-SUBSTITUTED 2-NITROSOIMINO-2,3-DIHYDROBENZOTHIAZOLES WITH ORGANOLITHIUMS
Authors: Akiba Kin-ya , Hisaoka Motoyuki , Inamoto Naoki
Published: July 2006

Reactions of 3-substituted 2-nitrosoimino-2,3-dihydrobenzothiazoles (1) with phenyllithium and n-butyllithium gave S, N-disubstituted o-aminothiophenol (3) as major product due to direct attack at the sulfur atom of benzothiazoline ring while that with benzyllithium gave 2,2-dibenzyl compound (2) and bis(N-substituted o-aminophenyl) disulfide (5). These results present a striking contrast to those with Grignard reagents.
THE X-RAY ANALYSIS OF BIS(1-(2-THIAZOLYLAZO)-2-NAPHTHOLATO)COBALT(III) PERCHLORATE
Authors: Kurahashi Masayasu
Published: July 2006

Crystal structure of bis(1-(2-thiazolylazo)-2-naphtholato)cobalt(III) perchlorate was determined by X-ray analysis. A cobalt atom is surrounded octahedrally by two terdentate ligands in the mer configuration. Short intramolecular contacts of 2.2–2.3 Å are observed between azo nitrogen atom(N(2)) and naphthol hydrogen atom(H(9)).
THE REACTION OF DICHLORODIETHOXYSILANE WITH ISOPRENE IN THE PRESENCE OF MAGNESIUM
Authors: Terunuma Daiyo , Hatta Satoshi , Araki Tsunao
Published: July 2006

Dichlorodiethoxysilane was treated with isoprene in the presence of magnesium in THF. It was found that new silacyclopentene derivatives i.e., 1,1-diethoxy-3-methyl-1-silacyclopentene-3(1), and 2,7-dimethyl-5-silaspiro[4.4]nonadiene-2,7(2), were produced in good yields, while sodium was used instead of magnesium in the reaction 2 was obtained in a low yield.
THERMAL PROPERTIES OF N, N′-DIHYDRO-1,10-PHENANTHROLINIUM AND N,N′-DIHYDRO-2, 2′-BIPYRIDINIUM PENTACHLOROMANGANATES(III)
Authors: Akabori Kozo
Published: July 2006

The thermal decomposition reactions of [H2(phen)] [MnCl5] and [H2(bipy)] [MnCl5] were studied in a flowing atmosphere of nitrogen and in vacuo. These complexes were decomposed thermally in stepwise manners as shown in Table 2. The thermally stable intermediates were isolated easily as their pure forms.
A NEW PHTHALIDE FROM A FUNGUS, ALTERNARIA KIKUCHIANA
Authors: Kameda Kiyoshi , Namiki Mitsuo
Published: July 2006

A new phthalide was isolated as a metabolite of Alternaria kikuchiana and identified as 3-carboxymethyl-7-hydroxyphthalide (1a).
ESR SPECTRA OP THE TRIPLET STATE OF 2,2′-BIPYRIDYL WITH Z AND E CONFORMATIONS
Authors: Ito Takeshi , Higuchi Jiro
Published: July 2006

Two sets of ESR spectra of the triplet state of 2,2′-bipyridyl in PVA films have been observed and explained to be due to its Z and E conformations from the experimental and theoretical viewpoints.
A NEW METHOD FOR PEPTIDE SYNTHESIS USING o-NITROPHENYLSULFENYL N-CARBOXY α-AMINO ACID ANHYDRIDES
Authors: Katakai Ryoichi , Oya Masanao
Published: July 2006

A New method for peptide synthesis using o-nitrophenylsulfenyl α-amino acid anhydrides (Nps-NCAs) is reported. The method involves the reaction of the Nps-NCA with an amino acid ester or a peptide ester to give a N-protected peptide ester by the Nps group. Some peptide derivatives have been easily prepared without racemization in very high yields by the new method. The advantages of this method may result from the rapid acylation of the amino group by the NCAs without formation of by-product.
STEREOSELECTIVE INTERACTION BETWEEN α-AMINO ACIDS AND THE NICKEL(II) COMPLEXES OF OPTICALLY ACTIVE TETRAMINES INCLUDING TWO PYRROLIDINYL GROUPS
Authors: Kitagawa Sadao , Murakami Tasuku , Hatano Masahiro
Published: July 2006

To the nickel(II) complexes of 1,2-bis[2(S)-2-aminomethyl-1-pyrrolidinyl]ethane and 1, 2-bis[2(S)-2-N-methylaminomethyl-1-pyrrolidinyl]ethane, some α-amino acidate ions coordinated stereoselectively. The stereoselectivity was evaluated in terms of the ratio of stability constants, KL/KD, by measurements of circular dichroism spectra.
DECARBONYLATION OF α-AND β-DIKETONES CATALYZED BY RHODIUM COMPOUNDS
Authors: Kaneda Kiyotomi , Azuma Hiromichi , Wayaku Masami , Tehanishi Shiichiro
Published: July 2006

α-and β-Diketones can be easily decarbonylated to monocarbonyl compounds by rhodium complexes at toluene reflux and at room temperature, β-diketones react with rhodium complex to afford chelate complexes without decarbonylation products.
CHARGE-CARRIER MOBILITY MEASUREMENTS USING THE SURFACE-TYPE CELL FOR ORGANIC CRYSTALS
Authors: Kamura Yusuke , Inokuchi Hiroo , Maruyama Yusei
Published: July 2006

The drift mobility measurement using the surface-type cell was presented, by which the charge-carrier mobility of the flake-like thin crystals and the evaporated thin films for the organic compounds was observed; the values for anthracene single crystal were about 1.2 cm2/V.s for holes and 0.5 cm2/V.s for electrons, those of tetrabenzoperylene evaporated film were 0.8 cm2/V.s for holes and electrons at room temperature.
CYCLOADDITION REACTION OF CYCLOBUTENE WITH AROYLAZIRIDINES —DIPOLE-DIPOLE INTERACTION MECHANISM IN 1,3-DIPOLAR CYCLOADDITION
Authors: Matsumoto Kiyoshi , Uchida Takane , Maruyama Kazuhiro
Published: July 2006

1,3-Dipolar reaction of a variety of aroylaziridines with dimethyl 1-cyclobutene-1,2-dicarboxylate resulted in the exclusive formation of one isomer of the isomeric adducts. Based upon the stoichiometry, the dipole–dipole interaction mechanism was suggested first in the 1,3-dipolar cycloaddition, which is not inconsistent with the stereochemical results hitherto reported.
THE NEW TRINUCLEAR COPPER(II) COMPLEXES WITH N,N-DIALKYL DIAMINOALCOHOLS
Authors: Nishida Yuzo , Kida Sigeo
Published: July 2006

New trinuclear copper(II) complexes, [Cu3[R2N(CH2)2 NH(CH2)3O]2(OH)2](C1O4)2 (R = CH3 , C2H5 ) were prepared and characterized by elemental analyses, IR-, UV- and ESR spectra, and magnetic susceptibilities (80∼295 K). In the trinuclear complex the three copper atoms are linearly arrayed and bridged with two alkoxo- and two hydroxo-groups. Under a little different experimental condition the same ligands and copper perchlorate form different crystals which were characterized as a complex of a binuclear structure.
REDUCTION BY A MODEL OF NAD(P)H. CONSTRUCTION OF ELECTRON BRIDGES
Authors: Kito Noboru , Ohnishi Yutaka , Kagami Masayuki , Ohno Atsuyoshi
Published: July 2006

Attempts have been made to construct electron bridges starting from N-benzyl-1,4-dihydronicotinamide, a model of NAD(P)H. It has been found that N-methylphenazinium methosulfate and pyocyanine are effective catalysts to reduce some substrates.
ASYMMETRIC OXIDATION OF SULFIDES TO SULFOXIDES BY N-BROMO-ε-CAPROLACTAM IN THE PRESENCE OF OPTICALLY ACTIVE ALCOHOLS
Authors: Kinoshita Masayoshi , Sato Yoshiyasu , Kunieda Norio
Published: July 2006

Oxidation of sulfides with N-bromo-ε-caprolactam in the presence of optically active alcohols affords the corresponding optically active sulfoxides. The absolute configuration of the sulfoxides obtained depends on the chirality of the alcohols used. The stereochemical course of this asymmetric oxidation is discussed.
SYNTHESIS OF [2-SERINE, 8-VALINE]-HUMAN CALCITONIN
Authors: Nozaki Sukekatsu , Muramatsu Ichiro
Published: July 2006

[2-Serine, 8-valine]-human calcitonin, an analog peptide, was synthesized by a liquid phase method, and exhibited a hypocalcemic activity of 80–120 MRC units.
PHOTOELECTRON SPECTRA OF BISDIMETHYLAMINOCYCLOPROPENONE AND RELATED COMPOUNDS
Authors: Kobayashi Tsunetoshi , Nagakura Saburo , Yoshida Zen-ichi , Konishi Hisatoshi , Ogoshi Hisanobu
Published: July 2006

The photoelectron spectra of bisdimethylaminocyclopropenone, bisdiisopropylaminocyclopropenone, and bisdimethylaminocyclopropenethione were measured and interpreted systematically in terms of MO’s obtained by the EHMO metho-d, their energies being found to decrease in the following order: b1π> carbonyl or thiocarbonyl b2n > a2π> b1π.
THE ELECTRODE REACTION OF INDIUM(III) IN THE PRESENCE OF PENTAAMMINEIODO- AND PENTAAMMINEISOTHIOCYANATOCOBALT(III) COMPLEXES AT THE DROPPING MERCURY ELECTRODE
Authors: Tanaka Nobuyuki , Kato Yoshikiyo , Yamada Akifumi , Kyuno Eishin
Published: July 2006

Polarographic reduction waves of In(III) in the presence of pentaammineiodo- or pentaammineisothiocyanatocobalt(III) complexes have been investigated. The catalytic effect on the electrode process of In(III) by iodide or thiocyanate ions which were liberated from the cobalt(II) complexes reduced simultaneously at the electrode was confirmed experimentally. A marked difference was found in the acceleration process between thiocyanate and iodide ions of these electrode reactions.
A MCD STUDY OF INDENYL ANION ITS APPLICATION TO THE ASSIGNMENT OF ABSORPTION BANDS
Authors: Tajiri Akio , Hatano Masahiro
Published: July 2006

The magnetic circular dichroism (MCD) spectra of indenyl anion was measured. The Faraday B terms were observed for bands in the range of wavelength 210∼400nm. Experimental B/D values were estimated to be +1.41×10−4, +1.84×10−4, +9.09×10−5 and −9.80×10−5 (β/cm−1) for four regions of absorption corresponding to electronic transitions A1→B2, A1→A1, A1→A1 and A1→B2, respectively. Thus MCD technique was shown to be applicable to the assignment of absorption bands.
ESR STUDY OF THE INTERACTION OF BIS(ACETYLACETONATO)COPPER(II) WITH HETEROCYCLES
Authors: Kogane Tamizo , Yukawa Haruo , Hirota Reiko
Published: July 2006

From ESR spectra measurements we report that bis(acetylacetonato)copper(II) forms 1:2 adduct with weak Lewis bases containing oxygen or nitrogen.
TEMPERATURE-DEPENDENT ENDOR SPECTRA OF α,α,γ,γ-BISDIPHENYLENE-β-PHENYL ALLYL RADICAL AND ITS DERIVATIVES
Authors: Watanabe Kohji , Yamauchi Jun , Ohya-Nishiguchi Hiroaki , Deguchi Yasuo , Ishizu Kazuhiko
Published: July 2006

ENDOR spectra of α,α,γ,γ-bisdiphenylene-β-phenyl allyl radical and its derivatives have been observed and the hyperfine splitting constants and spin density distribution have been determined.

At low temperature below −85 °C the allyl skeleton twists unsymmetrically on either sides and the wagging activation energy is estimated to be about 2.5 kcal/mole.
SOLID PHASE PEPTIDE SYNTHESIS USING ULTRASONIC WAVES
Authors: Takahashi Satomi , Shimonishi Yasutsugu
Published: July 2006

The introduction of ultrasonic waves into solid phase peptide synthesis was devised. Using the technique peptide synthesis on solid support was accelerated. Bradykinin was synthesized easily in good yield and high purity, demonstrating that it is a powerful tool for solid phase peptide synthesis.
LAYERED COMPOUNDS. XXI. MULTILAYERED PARACYCLO-FURANOPHANES AND -THIOPHENOPHANES
Authors: Osaka Norihisa , Mizogami Shigeyoshi , Otsubo Tetsuo , Sakata Yoshiteru , Misumi Soichi
Published: July 2006

Non-substituted double, triple, and quadruple layered paracycloheterophanes, I∼III, were synthesized. Their nmr spectra demonstrate the fixation of thiophene ring and the internal inversion of furan ring at room temperature. The electronic spectra show trans-annular electronic interaction among chromophores.
WATER PARTICIPATION IN THE CRYSTALLINE STATE PHOTOREACTION PHOTODIMERIZATION OF p-FORMYLCINNAMIC ACID
Authors: Nakanishi Fusae , Nakanishi Hachiro , Tasai Takeshi , Suzuki Yasuzo , Hasegawa Masaki
Published: July 2006

p-Formylcinnamic acid (p-FCA) crystal photodimerizes with incorporation of water to give rise to the monohydrated dimer crystal. When p-FCA crystal is photoirradiated in the absence of water, water-free amorphous dimer is obtained. p-Nitro- and p-chlorocinnamic acids were found to dimerize in the same manner as p-FCA.
ASYMMETRIC REACTIONS.1. ASYMMETRIC SYNTHESIS OF METHYL α-PHENYLPROPIONATE BY MEANS OF OPTICALLY ACTIVE POLYMERS
Authors: Yamashita Tetsushi , Yasueda Hiroshi , Nakamura Nobuo
Published: July 2006

Asymmetric addition of methanol to phenylmethylketene was attempted with optically active low molecular weight and polymeric amines. Both of them were derived from quinine, N-alkylprolinol and ephedrine as propionyl and poly-acryloyl esters. Quinine and N-alkylprolinol catalysts showed a type of remarkable polymer effect with regard to stereoselectivity.
SOLID-PHASE THERMAL SE REACTION OF [Cr(NH3)6][Al(nta)2]· 4H2O
Authors: Tsuchiya Ryokichi , Uehara Akira , Kyuno Eishin
Published: July 2006

[Cr(NH3)6][Al(nta)2]· 4H2O was newly prepared, of which solid-phase thermal reaction was investigated by means of derivatography. The results showed that the complex converts finally into Al[Cr(nta)2]. The reaction is unique in respect to both involvement of metal substitution and occurrence of variation in coordination types of the nitrilotriacetate ions.
CARBOXYLATION REACTION OF DIISOBUTENE AND 1-OCTENE WITH CARBON MONOXIDE USING A Cu(I)CARBONYL BF3–H2O CATALYST SYSTEM
Authors: Yoneda Norihiko , Fukuhara Tsuyoshi , Takahashi Yukio , Suzuki Akira
Published: July 2006

The carboxylation of diisobutene and 1-octene with carbon monoxide using Cu(I)carbonyl as catalyst in BF3–H2O takes place smoothly at room temperature to produce tertiary carboxylic acids in high yields. The present procedure is superior to that using the same catalyst in concentrated H2SO4, both from a point of view of high yield of carboxylic acids and ready separation of such acids from the catalyst layer.
X-RAY DETERMINATION OF THE STRUCTURE OF ANHYDROUS DIPHENYLCYCLOPROPENONE. VARIATIONS OF THE MOLECULAR GEOMETRY DUE TO HYDROGEN BONDING
Authors: Tsukada Harumichi , Shimanouchi Hirotaka , Sasada Yoshio
Published: July 2006

The crystal structure of anhydrous diphenylcyclopropenone was determined and the structural features are compared with those in its monohydrate. The systematic variation of the molecular geometry found is attributable to the contribution from a dipolar ionic form, enhanced by the formation of the hydrogen bond.
ENDOR STUDY OF HINDERED INTERNAL ROTATION OF THE ALKYL GROUP IN THE 4,4′-DIISOPROPYL BIPHENYL ANION RADICAL
Authors: Nemoto Fujito , Shimoda Fumio , Ishizu Kazuhiko
Published: July 2006

Utilizing ENDOR observations for the 4,4′-diisopropylbiphenyl anion, the β-proton coupling constants were determined and their temperature dependence was investigated. The positive temperature dependence of the β-proton coupling constant was interpreted utilizing a revised model of restricted rotation for isopropyl groups (see Fig.3-b). The energy difference, Eo between the two equilibrium states of this restricted rotational system was estimated to be 0.4 Kcal/mol.
A NEW BINUCLEATING LIGAND, 3-FORMYLSALICYLIC ACID, AND ITS COPPER(II) AND NICKEL(II) COMPLEXES
Authors: Tanaka Mitsunori , Okawat Hisashi , Hanaoka Isamu , Kida Sigeo
Published: July 2006

A new binucleating ligand, 3-formylsalicylic acid, was prepared and its copper(II) and nickel(II) complexes were characterized. On the basis of the analytical, IR, electronic, and magnetic data, it was demonstrated that these complexes have a binuclear structure bridged by the phenolic oxygens. No monomeric complex could be obtained.
RADIATION-INDUCED IONIC POLYMERIZATION OF α-METHYLSTYRENE: AN APPLICATION OF THE HITTORF METHOD
Authors: Katayama Meiseki , Ushimaru Sadao
Published: July 2006

The radiation-induced ionic polymerization of α-methylstyrene has been studied by means of the Hittorf type conductivity measurement. For extremely dry samples it has been estimated that the chain transfer to monomer is about 105. It was concluded that freely moving electrons play an important role in the polymerization.
MASS SPECTROMETRY OF COBALT(III) MIXED LIGAND CHELATES WITH ACETYLACETONE AND OXINE
Authors: Kidani Yoshinori , Naga Shinobu , Koike Hisashi
Published: July 2006

Two kinds of Co(III) mixed ligand chelates with acetylacetone and oxine were newly synthesized, and their mass spectra were analyzed. A binding ratio of Co, acac, and oxine has been determined to be 1:2:1 and 1:1:2 respectively, and it was found that Co(acac)(oxine)2 was more stable than Co(acac)2(oxine) under electron impact.
PREPARATION OF RUTILE POWDERS BY VAPOR PHASE REACTION OF TiCl4–H2–CO2 SYSTEM
Authors: Kato Akio , Suyama Yoko
Published: July 2006

Titanium dioxide powders of 98 % rutile content were obtained by vapor phase reaction of TiCl4–H2–CO2 system at temperatures above 1000 °C. The average particle sizes of products were 0.11∼0.66 μ. The sizes decreased with increasing reaction temperatures.
POLAROGRAPHY OF THE CIS-DICYANOBIS(ETHYLENEDIAMINE)CHROMIUM(III) COMPLEX
Authors: Maki Nobufumi
Published: July 2006

The cis-[CrIII(CN)2en2]ClO4 complex gave rise to a two-stepped wave responsible for the reductions of Cr(III) to Cr(II) and to Cr(I) state at the dropping mercury electrode(DME) in dimethyl sulfoxide(DMSO). The reduction of the first step is reversible, while that of the second is quasi-reversible. The standard redox potential of the Cr(III)/Cr(II) couple was −1.586 V (vs. aq. SCE). In aqueous solutions containing 0.5 M Na2SO4 or acetate buffer, however, the cis-[Cr(CN)2en2]+ ion gave rise to only one irreversible wave for the reduction of Cr(III) to Cr(II) even in the presence of ethylenediamine in a large excess. Unlike the cases of cis-[Co(CN)2en2]+ and cis-[Co(CN)2dip2]+, the aquation of the resulting Cr(II) complex occurs so fast that a cyanide disproportionate reaction cannot be observed under such conditions.
A NOVEL HIGH-SPIN NICKEL(II)-COPPER(II) BINUCLEAR COMPLEX
Authors: Okawa Hisashi , Tanaka Mitsunori , Kida Sigeo
Published: July 2006

The novel binuclear hetero-metal complex, CuNi(fsacen)·3H2O, was synthesized, where H4fsacen denotes N,N′-ethylenebis(3-carboxysalicylaldimine). This complex has [CuN2O2]- and [NiO6]-chromophores and two metal ions are connected by the phenolic oxygens. The magnetic susceptibility was well explained in terms of the equation for the high-spin nickel(II)-copper(II) cluster.
PREPARATION AND STRUCTURAL ASSIGNMENT OF ISOMERS OF POTASSIUM TRANS(N)-(C-METHYL SUBSTITUTED AMMONIATRIACETATO)(β-ALANINATO)COBALTATE(III)
Authors: Koine Norio , Yamaguchi Hiroyuki , Tanigaki Teiichi , Hidaka Jinsai , Shimura Yoichi
Published: July 2006

Potassium trans(N)-(C-methyl substituted ammoniatriacetato)(β-alaninato)cobaltate(III) have been prepared, where C-methyl substituted ammoniatriacetates are (S)-alaninate-N,N-diacetate and (R,S)- or (S,S)-alaninate-N-isopropionate-N-acetate. Some of the possible isomers concerning the arrangement of three feet of the tripod-like quadridentate ligand have been isolated and assigned structurally on the basis of the nuclear magnetic resonance spectra and isomerization experiments.
VISIBLE ABSORPTION SPECTRA OF CHLOROPHYLL b IN METHANOL, DIOXANE AND/OR WATER SOLUTIONS
Authors: Iriyama Keiji , Yoshiura Masahiko , Asai Hiroshi
Published: July 2006

Chlorophyll b (Chl-b) in methanol solution absorbing at 650 nm (Cb65O) forms microcrystals absorbing at 680 nm after the addition of water. In methanol-dioxane-water solutions. Chl-b molecules form an aggregate absorbing at 672 nm (Cb672). Cb672 was obtained either by mixing a small volume of a methanol-dioxane solution of Chl-b with a large volume of water, or by mixing a large volume of methanol-water solution of the pigment with a small volume of dioxane.
A COMPARISON OF THE RATE OF CHLORINATION AT THE METHINE IN SOME MIXED LIGAND ACETYLACETONATOCOBALT(III) COMPLEXES
Authors: Kuroda Kashiro , Kamiiba Yukiko
Published: July 2006

The rate of chlorination at the methine in six kinds of mixed ligand acetylacetonatocobalt(III) complexes ((NH3)4-, (en)2-, α-trien-, β-trien-, fac(N)-i-DTMA-, and mer(N)-i-DTMA-complexes) have been compared in slightly acidic aqueous solution at 40°C. It has been found that the charge of the complex ions is not a dominant factor influencing the chlorination velocity.
AROMATIC SUBSTITUTION OF OLEFINS. REACTIONS OF NAPHTHALENE AND TRICARBONYL(η-CYCLOBUTADIENE) IRON(0) WITH STYRENE IN THE PRESENCE OF PALLADIUM(II) ACETATE
Authors: Fujiwara Yuzo , Asano Ryuzo , Moritani Ichiro , Teranishi Shiichiro
Published: July 2006

Naphthalene and tricarbonyl(η-cyclobutadiene)iron(0) have been found to react with styrene in the presence of palladium(II) acetate to give the styryl-substituted derivatives. This result shows that the present reaction possesses a high generality with which the reaction can be extended to such classes of the aromatic compounds.
STRUCTURES OF CORYNOXIDINE AND EPICORYNOXIDINE, NEW ALKALOIDS FROM CORYDALIS KOIDZUMIANA
Authors: Tani Chiaki , Nagakura Naotaka , Hattori Shin , Masaki Norio
Published: July 2006

The structures of corynoxidine(I) and epicorynoxidine(II) were determined by X-ray and chemical studies. Both alkaloids are N-oxides of 1-tetrahydropalmatine and different only in the B/C ring juncture.
THE PHOTOCHEMISTRY OF 2-QUINOLINECARBONITRILES. III. THE BENZOPHENONE-SENSITIZED REACTION
Authors: Hata Norisuke , Ohtsuka Ryoichi
Published: July 2006

Benzophenone-sensitization of 2-quinolinecarbonitrile (1), 4-methylquinoline-2-carbonitrile (2), or 4-chloroquinoline-2-carbonitrile (3) in ethanol resulted in the formation of triazapentaphene (1a), 2-(hydroxydiphenylmethyl)-4-methylquinoline (2a), or 4,4′- bi-(2,2′-dicyano)quinoline (3a) in a good yield. It appears that 1 → 1a proceeds through the T1 (π,π*) state populated by an energy-transfer mechanism, whereas 2 → 2a or 3 → 3a occurs via the ketyl radical of benzophenone which exchanges a hydrogen atom with 2 or 3 in the ground state.
VINYL POLYMERIZATION. 338. GENERATION OF FREE RADICAL BY THE REACTIONS OF α-AMYLASE OR SYNTHETIC POLY-α-AMINO ACID WITH COPPER(II) ION IN THE PRESENCE OF METHYL METHACRYLATE
Authors: Imoto Minoru , Nishimura Tamio , Sakade Naoya , Ouchi Tatsuro
Published: July 2006

The polymerization of methyl methacrylate initiated with the system of α-amylase or poly-α amino acid in the presence or absence of copper(II) ion was carried out at 85°C. It was found that the coexistence of water was indispensable. Even in the absence of copper (II) ion, the polymerization occurred to some extent. However, metallic ion was concluded to give a preferable effect.
ALKYLATION REACTION ACCOMPANIED BY DEALKOXYCARBONYLATION OF β-KETO ESTERS, GEMINAL DIESTERS AND α-CYANO ESTER IN HEXAMETHYLPHOSPHORIC TRIAMIDE (HMPA)
Authors: Asaoka Morio , Miyake Kazutoshi , Takei Hisashi
Published: July 2006

In the presence of alkali halide β-keto esters, geminal diesters and ethyl cyanoacetate in HMPA reacted with alkyl halides to give α-alkylated ketones, esters and nitrile, respectively. α-Acetyl-γ-butyrolactone and its derivative afforded corresponding acylcyclopropane derivatives.
FORMATION OF 1,4-THIAZINE 1,1-DIOXIDES BY THE CYCLOADDITION–EXTRUSION–RING EXPANSION REACTIONS OF MESOIONIC OXAZOLONES WITH DIPHENYLTHIIRENE DIOXIDE
Authors: Matsukubo Hiroshi , Kojima Masanobu , Kato Hiroshi
Published: July 2006

The reactions of diphenylthiirene dioxide 5 with a mesoionic oxazol-5-one 4a and an oxazolin-5-one 9 gave the corresponding 4H-1,4-thiazine 1,1-dioxides 7.
PROOF OF INTERMEDIACY OF AZIRINE OLIGOMERS FOR DIHYDROPYRAZINE FORMATION FROM 1-AZIRINE. THE STRUCTURES OF THE OILGOMERS
Authors: Shimizu Makoto , Isomura Kazuaki , Taniguchi Hiroshi
Published: July 2006

Two kinds of azirine oligomers were isolated as intermediates in dihydropyrazine formation from 1-azirine, and the structures of these oligomers were determined by ir, 1H nmr, and 13C nmr as polyaziridine and polyimine. Polyaziridine rapidlychanged into polyimine by addition of ethanol, and heating of the ethanol solution of polyimine gave dihydropyrazine and aminoacetal, which proved the intermediacy of these oligomers for dihydropyrazine formation from 1-azirine.
NEW METHOD FOR THE PREPARATION OF POLYENALS FROM δ-ALKOXY-α,β-UNSATURATED ALDEHYDES
Authors: Ishida Akihiko , Mukaiyama Teruaki
Published: July 2006

In the presence of tertiary amine and molecular sieves, δ-alkoxy-α,β-unsaturated aldehydes were easily converted into the corresponding polyenals, useful intermediates in carotenoid synthesis, in good yields under mild conditions.
FLUORESCENT X-RAY Kβ SHIFT AND MAGNETIC MOMENT OF Mn2+ ION IN ORDERED PEROVSKITES (BaLa) (MnMo)O6, (SrLa) (MnTa)O6 AND Ba3(MnTa2)O9
Authors: Nakamura Tetsuro , Gohshi Yohichi
Published: July 2006

The rock salt arrangement between Mn and Mo or Ta was found in new compounds (BaLa) (MnMo)O6 and (SrLa) (MnTa)O6. The fluorescent X-ray Kβ shift from Mn in (BaLa) (MnMo)O6 was located between those of MnO and (SrLa) (MnTa)O6. (SrLa) (MnTa)O6 obeyed the Curie–Weiss law above the room temperature, while (BaLa) (MnMo)O6 showed a ferrimagnetism with Tc=120 K. The valency pair (Mn2+, Mo5+) in (BaLa) (MnMo)O6 was verified.
C9H10 HYDROCARBONS: THE PHOTOCHEMISTRY OF TRICYCLO[3.2.2.02,4]NONA-6,8-DIENES (HOMOBARRELENES)
Authors: Kumagai Tsutomu , Mukai Toshio
Published: July 2006

The photoreaction of homobarrelenes (1 and 6) was investigated; and the formation of novel photoproducts, 2,4-exo-homosemibullvalenes (3 and 7) was observed. The reaction path was discussed from a viewpoint of the di-π-methane rearrangement.
REACTION OF ACETYL ARALKYL DISULFIDES WITH TRIPHENYLPHOSPHINE
Authors: Kawamura Shunichi , Sato Akeshi , Nakabayashi Takeshige , Hamada Masayuki
Published: July 2006

Acetyl benzyl and acetyl benzhydryl disulfides which were labeled with 35S at acetylsulfenyl sulfur, were prepared, and were allowed to react with triphenylphosphine. Radioassay of triphenylphosphine sulfide obtained showed that the benzylsulfenyl sulfur atom of the former, and, on the contrary, acetylsulfenyl sulfur in the latter compound was extruded.
ISOLATION OF REACTION INTERMEDIATE OF OLEFIN EPOXIDATION CATALYZED BY MOLYBDIC ANHYDRIDE-HEXAMETHYLPHOSPHORICTRIAMIDE CATALYST
Authors: Arakawa Hironori , Ozaki Atsumu
Published: July 2006

The molybdic anhydride-catalyzed epoxidation of olefin by t-butyl hydroperoxide was studied with particular reference to the induction period and the effect of additives. The epoxidation in the presence of hexamethylphosphorictriamide(HMPT) proceeds through an intermediate complex, MoO(O2)2-HMPT, which was isolated as an adduct with bipyridyl.
QUENCHING OF FLUORESCENCE OF POLYESTERS HAVING PENDANT ANTHRYL GROUPS BY POLYESTERS HAVING PENDANT N,N-DIMETHYLANILINO GROUPS
Authors: Tazuke Shigeo , Sato Kaname , Banba Fumio
Published: July 2006

Fluorescence of various polyesters prepared from 2-(9-anthryl)methylpropane-1,3-diol was quenched by various polyesters prepared from 2-(4-dimethylaminobenzyl)propane-1,3-diol. The sequence of quenching constants(Kq) was discussed with special reference to the polymer structures of fluorescers and quenchers. When terephthalate groups were incorporated in the main chain of quencher, Kq increased very much, which was interpreted by cooperative quenching action of donor(amine) and acceptor(terephthalate). This concept was unequivocally evidenced by separate experiments.
MÖSSBAUER SPECTROSCOPIC STUDIES OF BIS(TRI-n-BUTYLTIN) SULFATE, SELENATE, AND CHROMATE
Authors: Sano Hirotoshi , Mekata Yoko
Published: July 2006

The Mössbauer parameters of bis(tri-n-butyltin) sulfate, selenate, and chromate have been determined in order to elucidate the intermolecular interaction of such species in solid state. The absolute values of recoilfree fraction have been estimated in the temperature range from 80 to 200 K and the mean square displacement of tin atom has been determined. From the results, as well as from the temperature dependence of quadrupole split line asymmetry, non-polymeric structure is inferred for those three compounds.
SELECTIVE HYDROGENATION OF α,β-UNSATURATED CARBONYL AND NITRILE COMPOUNDS CATALYZED BY RESIN-SUPPORTED RHODIUM CARBONYL COMPLEXES
Authors: Kitamura Takanori , Joh Takashi , Hagihara Nobue
Published: July 2006

The rhodium carbonyl complexes supported on cross-linked polymeric amines catalyze the heterogeneous hydrogenation of α,β-unsaturated carbonyl and nitrile compounds with carbon monoxide and water.
NEW TYPE OF MESOIONIC SYSTEM. 1,3-DIPOLAR CYCLOADDITION OF ANHYDRO-4-HYDROXY-1,3-OXAZOLIUM HYDROXIDE WITH ACETYLENIC COMPOUNDS
Authors: Ibata Toshikazu , Hamaguchi Masashi , Kiyohara Hideo
Published: July 2006

The reaction of anhydro-4-hydroxy-1,3-oxazolium hydroxide (3) with acetylenic dipolarophiles gave 1,3-dipolar cycloadducts (4) along with furans (5). On heating above 80°C, most cycloadducts decomposed to the corresponding furans under release of methyl isocyanate.
TETRACOVALENT SULFUR INTERMEDIATES IN SULFIDE-SULFONIUM ION REACTIONS
Authors: Minato Hiroshi , Miura Takashi , Takagi Fumio , Kobayashi Michio
Published: July 2006

Methyl sulfide was very rapidly t-butylated by di-t-butylmethylsulfonium ion, forming t-butyldimethylsulfonium ion. Benzylation of methyl sulfide with dibenzylmethylsulfonium ion was a little slower, and i-propylation with methyldi-i-propylsulfonium ion was not observed. A mechanism presented involves the formation of a tetracovalent sulfur intermediate.
THE PHOTOINDUCED DEOXYGENATION REACTION OF HETEROCYCLIC N-OXIDES
Authors: Hata Norisuke , Ono Isao , Kawasaki Masao
Published: July 2006

The azanaphthalene N-oxides underwent the photochemical deoxygenation reaction in benzene containing BF3-etherate, resulting in the formation of the parent amines in a 70–80% yield. The triplet sensitizations of quinoline-, isoquinoline-, and acridine-N-oxides by biacetyl or eosin also led to the dissociation of the N–O bond.
EVIDENCE FOR THE ELECTRON TRANSFER FROM [Co(II)(

en

)2Cl]+ TO [Co(III)(

en

)2Cl2]+ IN METHANOL
Authors: Goto Masafumi , Fujii Tsuneo , Sakai Tomoya
Published: July 2006

The addition of [Co(II)(en)2Cl]+ accelerated the isomerization of cis-[Co(III)(en)2Cl2]+ to its trans-isomer in methanol. The reaction by use of [Co(II)(en)2Br]+ or [Co(II)(l-chxn)2Cl]+ instead of [Co(II)(en)2Cl]+ produced trans-[Co(III)(en)2BrCl]+ or trans-[Co(III)(l-chxn)2Cl2]+, respectively. These evidences demonstrated the inner-sphere electron transfer from Co(II) to Co(III) in the acceleration mechanism of the title isomerization reaction.
CATALYTIC REDUCTION OF AROMATIC NITRO COMPOUNDS WITH HYDRAZINE IN THE PRESENCE OF IRON(III) CHLORIDE AND ACTIVE CARBON
Authors: Hirashima Tsuneaki , Manabe Osamu
Published: July 2006

A catalytic reduction of aromatic nitro compounds to aromatic amino compounds with hydrazine in the presence of Fe(III) chloride and active carbon was studied. The corresponding amino compounds were obtained with excellent purities and in good yields. The method was also applied to the partial reduction of dinitro compounds.
MOLECULAR STRUCTURE DETERMINATION OF 4-METHYLBENZOPHENONE 2,4-DINITROPHENYLHYDRAZONE BY X-RAY ANALYSIS
Authors: Takada Yoshiyuki , Tabata Masayoshi , Suzuki Akira , Furusaki Akio
Published: July 2006

Three isomeric forms of the title compound; I, m.p. 235°C, II, m.p. 222°C and III, m.p. 200°C, were isolated by crystallization using dioxane-ethanol. The details of the molecular geometry of II was determined by X-ray analysis.
PALLADIUM AND PLATINUM COMPLEXES OF A CHELATE YLID
Authors: Oosawa Yoshinao , Miyamoto Takeshi , Saito Taro , Sasaki Yukiyoshi
Published: July 2006

A new type bidentate phosphorus ylid, benzoylmethylenediphenyl-2-diphenylphosphinoethylphosphorane (L) and its complexes MCl2(L) (M = Pd and Pt) have been synthesized and characterized.
BEHAVIOUR OF GOLD METAL AS AN IMPURITY FOR THE CHEMICAL VAPOUR DEPOSITION OF TITANIUM NITRIDE WHISKERS ON QUARTZ GLASS
Authors: Sugiyama Kozoh , Takahashi Yasutaka , Motojima Seiji
Published: July 2006

The role of gold metal for whisker growth of TiN according to reaction

TiCl4 + 1⁄2N2 + 2H2 \ightharpoonupTiN + 4HCl

was investigated, and it was concluded that the gold metal reacted at growth conditions with quartz glass to give an Au–Ti–Si alloy which was an important liquid phase in VLS growth of TiN crystals.
HYDROGEN ISOTOPE EFFECT ON RADICAL ADDITION REACTION OF SODIUM HYDROGENSULFITE TO ALLYL ALCOHOL
Authors: Miyata Teijiro , Sakumoto Akihisa , Washino Masamitsu , Abe Toshihiko
Published: July 2006

The radical addition reaction of sodium hydrogensulfite to allyl alcohol in D2O solution was investigated. The hydrogen isotope effect was found to be 4.11. This effect is attributed to the hydrogen atom abstraction of HOCH2CHCH2SO3− radical ion from hydrogensulfite ion.
SYNTHESES OF 7,17-BIS(2-ETHOXYCARBONYLETHYL)-2,3,12,13-TETRAETHYL-8,18-DIMETHYLPORPHIN AND ITS DERIVATIVES
Authors: Ogoshi Hisanobu , Sugimoto Hiroshi , Sanada Shin-ichi , Watanabe Ei-ichi , Yoshida Zen-ichi
Published: July 2006

Symmetric porphyrin, 7,17-bis(2-ethoxycarbonylethyl)-2,3,12,13-tetraethyl-8,18-dimethylporphin (6) was prepared by the a,c-biladiene route. Hydrolysis of 7,17-diethyl ester groups afforded 7,17-bis(carboxyethyl)porphyrin (7) and successive treatment of (7) with n-butylamine gave 7,17-bis[2-(N-n-butylcarbamoyl)ethyl]porphyrin (8). Reduction of (6) with LiAlH4 gave 7,17-bis(2-hydroxyethyl)porphyrin (9) and bromination of (9) with HBr yielded unstable 7,17-bis(2-bromoethyl)porphyrin (10).
A NOVEL TYPE OF ADDUCTS IN THE PHOTOCHEMICAL REACTIONS OF 2-PYRIDONES WITH CYANOETHYLENES
Authors: Somekawa Kenichi , Shimou Tetsuro , Tanaka Kazunori , Kumamoto Sanetada
Published: July 2006

Irradiation of mixtures of 2-pyridones and cyanoethylenes gave a novel type of adducts, 3-cyano-1,2,3,4-tetrahydro-azocin-2-ones, and [2+2]cycloadducts. 2-Pyridones used were 2-pyridone, 4-methyl-2-pyridone, and N-methyl-2-pyridone, and cyanoethylenes used were acrylonitrile, crotononitrile. and methacrylonitrile. The structures of these photoadducts were mainly determined by PMR and mass spectra.
ALICYCLIC TERPENOIDS FROM CYCLOCITRAL PHENYL SULFIDES. I. ACID-CATALYZED CYCLIZATION OF GERANYL PHENYL SULFIDES TO CYCLOCITRAL DERIVATIVES. A SYNTHESIS OF α- AND β-IONONES
Authors: Torii Sigeru , Uneyama Kenji , Isihara Masakazu
Published: July 2006

Cyclocitryl phenyl sulfides (IIa and IIIa) and sulfones (lIb and IIIb) were efficiently prepared by acid-catalyzed cyclization of geranyl phenyl sulfide (Ia) and sulfone (Ib). The sulfones (IIb and IIIb) could be converted into α- and β-ionones. The cyclization of citral diphenylthioacetal (ic) afforded the tricyclic compound (Vl), The detailed cyclization conditions are discussed.
A NOVEL SYNTHESIS OF ALIPHATIC NITRILES FROM ORGANOBORANES BY ELECTROCHEMICAL REACTION
Authors: Takahashi Yuzuru , Tokuda Masao , Itoh Mitsuomi , Suzuki Akira
Published: July 2006

Trialkyiboranes are readily electrolyzed by using two platinum plates as the electrodes in an acetonitrile solution containing tetraalkylammonium halide to give corresponding aliphatic nitriles in good yields.
DIRECT GLUCOSIDATION OF 2,3,4,6-TETRA-O-BENZYL-α-d-GLUCOPYRANOSE
Authors: Koto Shinkiti , Hamada Yoshio , Zen Shonosuke
Published: July 2006

2,3,4,6-Tetra-O-benzyl-α-d-glucopyranose was condensed with methanol, cyclohexanol, and methyl 2,3,4-tri-O-benzyl-α-d-glucopyranoside to give corresponding β-glucosides via activation by a system of silver trifluoromethanesulfonate–p-nitrobenzenesulfonyl chloride–triethylamine.
THE SYNTHESIS OF dl-FURANOMYCIN
Authors: Masamune Tadashi , Ono Mitsunori
Published: July 2006

The synthesis of dl-furanomycin, an antibiotic α-amino acid with a 2,5-dihydrofuran moiety, is described.
SILYL PHOSPHITES. II. REACTIONS OF TRIS(TRIMETHYLSILYL) PHOSPHITE WITH ALKYL HALIDES
Authors: Hata Tsujiaki , Sekine Mitsuo , Kagawa Norio
Published: July 2006

Alkylphosphonic acids and phenacyl enol-phosphate were obtained in high yields by the reactions of alkyl bromides or phenacyl bromide with tris(trimethylsilyl) phosphite followed by hydrolysis under very mild conditions.
SILYL PHOSPHITES. III. REACTION OF TRIS(TRIMETHYLSILYL) PHOSPHITE WITH DIKETONES
Authors: Hata Tsujiaki , Sekine Mitsuo , Ishikawa Nobuo
Published: July 2006

The silylated enediol- and quinol-phosphates were obtained in high yields by the reactions of α-diketones or p-quinones with tris(trimethylsilyl) phosphite.
ALCOHOLYSIS OF PYRILINECARBONITRILES WITH METAL CHELATES
Authors: Watanabe Ken-ichi , Kidokoro Koji
Published: July 2006

Metal chelate catalyzed alcoholysis of pyridinecarbonitriles revealed that the reaction products are alkyl pyridinecarboximidates. The use of copper(II) complexes containing one molecular amine gave good results. The reactivities of alcohols were in the order: methanol> ethanol> butanol> isopropyl alcohol. Cu(II), Ni(II), and Co(II) salts were also effective for the reactions.
REACTIVITIES OF STABLE ROTAMERS. I. REACTION OF 9-(2-METHOXY-1-NAPHTHYL)FLUORENE WITH BUTYLLITHIUM
Authors: Nakamura Mikio , Oki Michinori
Published: July 2006

Two rotamers, sp and ap forms, of 9-(2-methoxy-1-naphthyl)fluorene are isolated and are found to exhibit at least 103 fold difference in reactivities with butyllithium.
A NEW SYNTHETIC PROCEDURE OF N-(2-HYDROXYETHYL)ETHYLENEDIAMINETRIACETATOMANGANESE(III) COMPLEX
Authors: Shirakashi Takashi , Tanaka Nobuyuki
Published: July 2006

When manganese(III) acetate was mixed with Na3hedtra in an acetic anhydride solution, Na[Mn(hedtra)(CH3COO)]·H2O·1/2(CH3CO)2O complex was obtained. This complex was unstable in an aqueous solution, but fairly stable in non-aqueous solvents such as methyl alcohol and dimethyl sulfoxide. This preparative method may be useful to synthesize other manganese(III) complexes.
NMR STUDIES OF PICOLYL-TYPE CARBANIONS. III. QUINALDYLLITHIUM AND ITS METHYL DERIVATIVES
Authors: Konishi Kazuyori , Onari Yasuo , Goto Shigeki , Takahashi Kensuke
Published: July 2006

The proton magnetic resonance spectra of the title carbanions have been observed in tetrahydrofuran(THF) with lithium as a counter ion. The two methylene protons in these carbanions are nonequivalent at room temperature. This shows that the α-carbon in these carbanions is in a near-sp2 configuration.