bluuebunny/crossref_metadata_2025_split huggingface dataset:
CARBON-13 NUCLEAR MAGNETIC RESONANCES OF COBALT(III) COMPLEXES CONTAINING AMINO-ACIDS
Authors: Ama Tomoharu , Yasui Takaji 
Published: July 2006

Abstract
The 13C-NMR spectra of α-amino-acids and their trans(O)-[Co en2(aaH)2]3+ complex ions were measured. The changes in chemical shift on protonation of carboxyl anion group of amino-acids were 2.5∼3.2 ppm and 1.1∼2.1 ppm upfield for the carboxyl carbons and α-carbons, and on coordination of carboxyl group to the cobalt(III) ion 3.8∼4.4 ppm downfield and almost zero for the former and latter carbons, respectively.
SYNTHESIS OF 1-β-(3-PHENYLPYRAZOL-4-YL)-d-RIBOFURANOSIDE, A C-NUCLEOSIDE
Authors: Arakawa Kiichi , Miyasaka Tadashi , Hamamichi Norimitsu 
Published: July 2006

Abstract
1-β- and 1-α-(3-Phenylpyrazol-4-yl)-d-ribofuranosides (7) and (8) have been prepared from 2,3,5-tri-O-benzoyl-d-ribofuranosyl bromide (1) through ethynylation with mercuric phenylacetylide (2) and subsequent 1,3-dipolar addition of diazomethane, followed by removal of the protecting groups with ammonia.
A STUDY OF ELECTRON SPIN RESONANCE SPECTRA OF THE 1,1,2,2-TETRAMETHYLDISILANYL RADICAL
Authors: Sakurai Hideki , Kira Mitsuo , Sato Michiko 
Published: July 2006

Abstract
The title radical, (CH3)2SiSi(CH3)2H, was generated by hydrogen abstraction from H(CH3)2SiSi(CH3)2H. The most stable conformation of the radical at low temperature deduced from the ESR spectrum is the one in which the β-Si–H bond eclipses the p orbital on the silyl radical site.
TRAPPING EXPERIMENT OF RADICAL SPECIES PRODUCED BY GLOW DISCHARGE REACTION OF SOME AROMATIC COMPOUNDS
Authors: Kikkawa Shoichi , Nomura Masakatsu , Morita Yukio , Hosokawa Noritaka 
Published: July 2006

Abstract
The authors have described the successful application of spin trapping as a diagnosis of short-lived free radicals formed from the glow discharge reaction of aromatic compounds. For example, in the decomposition of toluene, benzyl radical was trapped by nitrosobenzene or pheny1-N-t-butylnitrone.
CYCLIC TETRAMERS OF CHIRAL AZIRIDINES. II. ISOLATION OF FOUR STEREOISOMERS
Authors: Tsuboyama Kaoru , Tsuboyama Sei , Uzawa Jun , Higashi Iwami 
Published: July 2006

Abstract
1-Benzyl-2-ethylaziridine (I) was oligomerized to give the cyclic tetramer (II). Four geometrical isomers are possible for II and all of them were isolated and characterized.
THE REACTION OF 3-METHYL-2-BUTENYL PHENYL SULFIDE WITH ALDEHYDES AND KETONES. APPLICATION TO THE SYNTHESIS OF 2,2-DIMETHYLCYCLOPROPANECARBALDEHYDES
Authors: Kondo Kiyosi , Matsui Kiyohide , Negishi Akira 
Published: July 2006

Abstract
The base promoted addition of 3-methyl-2-butenyl phenyl sulfide to aldehydes and ketones occurred selectively on the γ-position of the allylic moiety. The product was converted to the methanesulfonate. Treatment of the resulting homoallylic ester with nucleophiles induced the cyclization to give cyclopropane derivatives in excellent yields.
AN OPTICAL ROTATION STOPPED FLOW APPARATUS
Authors: Watanabe Fumiyuki , Nagamura Toshihiko 
Published: July 2006

Abstract
A stopped flow apparatus has been proposed for optical rotation changes. This apparatus, even when the signals of optical rotation changes are masked by absorption changes, can detect only the signals of optical rotation changes. The apparatus is examined by several model reactions: The maximum sensitivity is 0.01 degree of rotation, the dead time ca. 80 msec. The 50% change of transmittance does not affect the signals of optical rotation changes.
CRITICAL COMPOSITION AND CRITICAL SOLUTION TEMPERATURE OF A BINARY MIXTURE OF ACETONITRILE AND WATER DETERMINED BY VARIABLE-TEMPERATURE PMR SPECTROSCOPIC METHOD
Authors: Morinaga Ken-ichi , Miyaji Kiyoshi , Tsurumi Makoto 
Published: July 2006

Abstract
Each of two PMR signals for a mixture of acetonitrile and water has been found to split into two peaks in a limited composition range at low temperatures. The splittings are attributable to the two-phase separation of the mixture. The critical composition and the critical solution temperature have been estimated by use of this phenomenon.
AN EFFECTIVE SYNTHESIS OF A BROMINE-CONTAINING ANTIBACTERIAL COMPOUND FROM MARINE SPONGES
Authors: Yamada Yasuji , Kim Jin-Suk , Iguchi Kazuo , Suzuki Michio 
Published: July 2006

Abstract
An antibacterial compound 1, 4-acetamido-2,6-dibromo-4-hydroxy-2,5-cyclohexadien-1-one, was effectively synthesized by an oxidation of phenolic amide 3 with thallium triperchlorate in aqueous media.
STRUCTURAL STUDY OF MUCOPOLYSACCHARIDE, CRYSTAL STRUCTURE OF CHONDROSINE MONOHYDRATE
Authors: Senma Masanori , Taga Tooru , Osaki Kenji 
Published: July 2006

Abstract
The structure of chondrosine monohydrate was determined by an X-ray study. The zwitter-ionic character of the molecule and the intermolecular hydrogen bondings stabilize the crystal structure. An intramolecular hydrogen bond is found between the axial oxygen O(4′) and the ring oxygen O(5). The galactosamine moiety has α-configuration in the crystalline state.
THE STEREOSPECIFIC PREPARATION OF METHYL FARNESOATE AND SYNTHETIC PRECURSORS OF C18- AND C17 JUVENILE HORMONES
Authors: Kobayashi Susumu , Mukaiyama Teruaki 
Published: July 2006

Abstract
The new method for the stereospecific preparation of 1,5-diene units was successfully applied to the syntheses of methyl farnesoate and the synthetic precursors of C18- and C17 juvenile hormones, 15 and 20.
A New Synthesis of Carbonohydrazide, Semicarbazide, and Carbazate
Authors: Kondo Kiyoshi , Sonoda Noboru , Sakurai Hiroshi 
Published: July 2006

Abstract
The reaction of carbon monoxide with N,N-dialkylhydrazine in the presence of selenium gave a salt of 3,3-dialkylselenocarbazic acid with hydrazine (I), which was oxidized quantitatively to give carbonohydrazide, water, and selenium. Aminolysis and alcoholysis of I followed by oxidation yielded semicarbazide and carbazate respectively in excellent yields under mild conditions.
PHOTOCHEMISTRY OF N2O5 WITH ADAMANTANES
Authors: Tabushi Iwao , Kojo Shosuke , Yoshida Zen-ichi 
Published: July 2006

Abstract
Photochemical reaction of N2O5 with adamantane is investigated. Products were 1-adamantyl nitrate(I), 1-nitroadamantane(II) , adamantanone(III), and 2-nitroadamantane(IV) , in the ratio of 5.5 : 4.4 : 2.2 : 1. The reaction is shown to proceed via triplet state of N2O5 and to have a typical chain character from the quantum yield measurement. NO3· is shown to be a chain carrier.
o-THIOQUINOMETHIDES. PREPARATION AND THE EQUILIBRIUM WITH THE [4+4] DIMER
Authors: Okazaki Renji , Inamoto Naoki 
Published: July 2006

Abstract
Photochemical reactions of 4,5-benzo-1,2-dithiole-3-thione with cycloalkenes afforded deep blue o-thioquinomethides which are in thermal equilibrium with the colorless dimers.
AMINOALUMINUM HYDRIDE AS NEW REDUCING AGENTS. I. SELECTIVE REDUCTION OF CARBOXYLIC ACIDS TO ALDEHYDES
Authors: Muraki Masayoshi , Mukaiyama Teruaki 
Published: July 2006

Abstract
A new method for the preparation of aldehydes from carboxylic acids by use of diaminoaluminum hydride is described. Reducing agents, diaminoaluminum hydrides, were prepared from aluminum hydride and two moles of various secondary amines. It was found that bis(4-methylpiperazinyl)aluminum hydride is the most suitable reducing agent, which reduces carboxylic acids to the corresponding aldehydes at room temperature or under reflux in good yields.
CONTROL PARAMETERS ON THE STEREOSELECTIVITY OF THE MICHAEL-TYPE ADDITION TO SUGAR NITROOLEFINS
Authors: Funabashi Masuo , Okamura Yuzuru , Mikami Kazutoshi , Yoshimura Juji 
Published: July 2006

Abstract
The stereoselectivity on the addition reaction of nucleophiles (CH3O− and PhCH2S−) to three model compounds, 6-deoxy-1,2-o-isopropylidene-6-nitro-3-o-substituted-α-d-xylo-hex-5-enofuranoses (1a, 1b and 1c) was examined in terms of six control parameters.
ACTIVATION ENERGY FOR HOLE INJECTION AND ANALYSIS OF THE SPACE CHARGE LAYER IN ANTHRACENE CRYSTALS
Authors: Kotani Masahiro , Watanabe Yoko , Kato Tomoko 
Published: July 2006

Abstract
It was found that the activation energy for hole injection at Ce4+/anthracene interface depends on the applied voltage. From an analysis of the voltage dependence the thickness of the space charge layer and the charge concentration in it could be estimated.
VERATRENONE, A NEW ALKALOID FROM VERATRUM SPECIES
Authors: Takasugi Mitsuo , Castro-Araya Victor Hugo , Masamune Tadashi , Furusaki Akio , Matsumoto Takeshi 
Published: July 2006

Abstract
A new alkaloid, designated as veratrenone, was isolated from Veratrum album L. var. glandiflorum Maxima. and assigned formula I on the basis of the spectral data and X-ray crystallography. The alkaloid is the first compound, whose structure represents the transition between the Fritillaria and ceveratrum alkaloids.
THE REACTION OF LITHIUM TRIALKYLVINYLBORATES AND ALDEHYDES AS APPLIED TO THE SYNTHESIS OF 1,3-DIOLS, γ-CHLOROALCOHOL, AND CYCLOPROPANE
Authors: Utimoto Kiitiro , Uchida Keiichiro , Nozaki Hitosi 
Published: July 2006

Abstract
Reaction of lithium trialkylvinylborates with aldehydes gives non-isolable boron compounds, 1,2-oxaborolane-bases borates (II) whose oxidative work-up furnishes 1,3-diols (III) smoothly. Successive treatment of a cyclic borate with phosphorus pentachloride and aqueous alkali provides a cyclopropane.
BARBARALYLIDENE, A NEW TYPE OE NUCLEOPHILIC CARBENE
Authors: Tsuruta Haruki , Mori Seiichi , Nishizawa Yoshinori , Mukai Toshio , Murahashi Shunichi , Hino Kenichi , Bansho Kenji , Moritani Ichiro 
Published: July 2006

Abstract
This study was carried out to elucidate the properties of barbaralylidene (II). Vacuum thermolysis of sodium salt of barbaralone tosylhydrazone (III) afforded mainly ethynylcycloheptatrienes (IV, V, and VI). The carbene (II), which was derived from III, did not add to electron-rich olefins, but instead added to electron-deficient olefins such as dimethyl fumarate, maleate or methyl acrylate to give spiro-cyclopropane derivatives (VII or XII) in addition to VIII or IX.
PREPARATION OF SQUARATO-COMPLEXES AND THE THERMAL SE REACTION THEREOF IN SOLID-PHASE
Authors: Tsuchiya Ryokichi , Uehara Akira , Sakui Masako , Kyuno Eishin 
Published: July 2006

Abstract
[Cr(NH3)6][Al(C4O4)3] was prepared by the reaction of [Cr(NH3)6] (NO3)3 with K3[Al(C4O4)3]·2H2O, where C4O42− designates squarate ion. The thermal reaction of the complex in the solid-phase was investigated by means of derivatography. It was found that the squarate ion initially coordinated to Al(III) ion migrates to Cr(III) ion upon heating through the formation of a transient intermediate in which the squarate ion is coordinated bilaterally toward both metal ions; the complex is converted finally into Al[Cr(C4O4)3].
DEAMINATION OF 2-BENZOYLAZIRIDINES BY FERROUS IODIDE
Authors: Imamoto Tsuneo , Yukawa Yasuhide 
Published: July 2006

Abstract
2-Benzoylaziridines (Ia–c and IIa,b) were deaminated to the corresponding trans-benzalacetophenones in high yields at room temperature by ferrous iodide.
HALOGENOBENZOQUINOPHTHALONE AS A NEW PIGMENT TO REPLACE CADMIUM YELLOW
Authors: Matsuoka Masaru , Kitao Teijiro , Konishi Kenzo 
Published: July 2006

Abstract
A new organic pigment, 5,8-dibromo-3′-hydroxybenzo[b]quinophthalone, has been developed to replace cadmium yellow. This compound is very similar to cadmium yellow in colour and has excellent pigment properties, such as good fastness to light, heat, migration, acid, alkali and organic solvents.
POLAROGRAPHY OF TRIS(2,2′-BIPYRIDINE)VANADIUM(0)
Authors: Saji Tetsuo , Aoyagui Shigeru 
Published: July 2006

Abstract
Polarograms and cyclic voltammograms of tris(2,2′-bipyridine)vanadium(0) were taken in a DMF solution. They exhibited three one-electron reduction waves corresponding to VL3−/VL3 (L=2,2′-bipyridine)-VL32−/VL3− and VL33/VL32− and two oxidation waves corresponding to VL3/VL3+ and VL3+/VL32+. The oxidation-reduction potential difference for VL3+ was anomalously small. This was explained by assuming diamagnetism of VL3+.
SOLID-PHASE THERMAL SE REACTION OF METAL COMPLEXES
Authors: Tsuchiya Ryokichi , Uehara Akira , Kyuno Eishin 
Published: July 2006

Abstract
A new type of solid-phase thermal reaction of metal complexes was found with [Cr(NH3)6][Al(ox)3] and [Cr(H2O)(NH3)5][Al(ox)3] by means of derivatography. Both the complexes were found to convert finally into Al[Cr(ox)3]. The reaction is differentiated from prior thermal SN reaction of metal complexes in respect to the involvement of metal substitution.
ARYLATION OF TETRAZOLIDE WITH DIARYLIODONIUM HALIDES: EVIDENCE FOR INTERMEDIACY OF BENZYNE
Authors: Akiyama Tetsuo , Imasaki Yoshio , Kawmisi Mituyosi 
Published: July 2006

Abstract
By the reaction with sodium 5-phenyltetrazolides (II) di-p-tolyliodonium bromide (I) afforded 1-m-tolyl-(III), 2-m-tolyl-5-phenyltetrazole (IV), t-butyl m-tolyl ether (V) together with corresponding p-isomers. This result infers the existence of the pathway through a benzyne.
REACTIVITIES OF 4,5-BRIDGED QUINAZOLINES
Authors: Sakane Kazuo , Otsuji Yoshio , Imoto Eiji 
Published: July 2006

Abstract
Introduction of the 4,5-bridged five-membered ring to quinazoline derivatives enhanced the rate of the acid-catalized hydrolysis of the quinazoline ring in the derivatives due to a steric effect caused by the presence of the bridged ring. This steric effect also reflected in their pKa values and polarografic half-wave potentials.
THE 13C CIDNP STUDIES ON THE PHOTOLYSIS OF METHYL DIAZOACETATE IN CHLORO-SUBSTITUTED METHANES
Authors: Iwamura Hiizu , Imahashi Yuzo , Oki Michinori , Kushida Katsuhiko , Satoh Shiro 
Published: July 2006

Abstract
The photolysis of methyl diazoacetate in CCl4, CHCl3, CH2Cl2, and CFCl3 has been examined by the 13C CIDNP methods. The insertion products Cl2XCCHClCO2CH3 (X=Cl and H) show emission for the carbonyl and C-3 carbons and enhanced absorption for C-2. The cage recombination of geminate pairs ‾Cl2XC· ·CHClCO2CH3 formed by the cleavage of the corresponding chloronium ylides is responsible for the polarization.
EFFECTS OF LIGANDS ON VARIOUS NMR PARAMETERS OF β-METHOXYISOBUTYLMERCURY COMPOUNDS
Authors: Ibusuki Takashi , Saito Yasukazu 
Published: July 2006

Abstract
Effects of ligands on various nmr parameters have been studied for (CH3)2C(OCH3)CH2HgL, and a linear relationship is found between 1JHgC and 2JHgH. With regard to δ199Hg and δ13C vs. 2JHgH, deviations from linearity occurring for the CN and SCN ligands are discussed in terms of π-bonding effect.
PHOTOELECTRON SPECTRUM (HeI) OF 9-METHYLANTHRACENE
Authors: Hino Shojun , Inokuchi Hiroo 
Published: July 2006

Abstract
A photoelectron spectrum of 9-methylanthracene, with first five π bands located at 7.25, 8.43, 9.07, 9.87, and 10.30 eV, is presented. Assignments of the bands based on CNDO and INDO calculations are given. In comparison with the spectrum of anthracene, the effects of the methyl group in 9-methylanthracene on the photoelectron spectrum are explained well by the MO calculations.
A CONVENIENT METHOD FOR THE SYNTHESIS OF γ-SUBSTITUTED-β -ACETYL- γ -BUTYROLACTONES
Authors: Mukaiyama Teruaki , Hanna Junichi , Inoue Tan , Sato Toshio 
Published: July 2006

Abstract
It was established that γ-substituted-β-acetyl-γ-butyrolactones are prepared in good yields by the reaction of α -angelicalactone with various aldehydes in the presence of BF3·O(C2H5)2.
PHOTOOXYGENATION OF ROTENONE
Authors: Chubachi Mitsuo , Hamada Masayuki 
Published: July 2006

Abstract
In the photooxygenation of rotenone(I) in pyridine solution, two isomers of rotenolones, 6aβ, 12aβ- and 6aβ, 12aα-rotenolones (II and III), were obtained besides dehydrorotenone(V) and rotenonone(VI). As one of acidic products, a keto-acid (IVa) was also isolated.
X-RAY PHOTOELECTRON SPECTRA OF PHOSPHORUS YLIDES. PROBING THE PHOSPHORUS-CARBON YLIDE BOND
Authors: Seno Manabu , Tsuchiya Shinji , Asahara Teruzo 
Published: July 2006

Abstract
The nature of the phosphorus-carbon ylide bond was investigated by means of XPS. The binding energies of P-2p electrons of Ph3P=CHCOR (R=p-nitrophenyl, phenyl, p-methoxyphenyl) were found to be lower than that of Ph3P=CHCOOMe. The binding energies of ylides are lower than those of the corresponding salts. These results are qualitatively consistent with IR data and 13P-nmr data.
DETERMINATION OF THE OPTICAL PURITY OF AMINO ACIDS BY COMPLEX FORMATION
Authors: Fujii Yuki , Yoneda Hayami 
Published: July 2006

Abstract
A new method has been established to determine the optical purity of small amount of amino acids (alanine, valine, and leucine). The method utilizes the fact that when the optically active amino acid is dissolved in an alkaline solution of K[Co(baen)(gly)2] complex, the mixed solution shows much larger optical rotation than that of the free amino acid in the visible region.
RING TRANSFORMATIONS OF OXYGEN CONTAINING HETEROCYCLES INTO NITROGEN CONTAINING HETEROCYCLES OVER SYNTHETIC ZEOLITES
Authors: Hatada Kou , Shimada Masatoshi , Fujita Katsuhiro , Ono Yoshio , Keii Tominaga 
Published: July 2006

Abstract
Synthetic zeolites are found to be effective catalysts for ring transformation of heterocycles. Furan reacts with ammonia over BaY to form pyrrole in 100% selectivity at 330°C. Tetrahydrofuran is converted to pyrrolidine in 70% selectivity over HY and MgY at 320°C, and γ-butyrolactone is converted to 2-pyrrolidone in 80% selectivity over CuY.
FACILE CONVERSION OF THIOLESTERS INTO THIOLS USING CYSTEAMINE
Authors: Endo Tadashi , Oda Kuniyuki , Mukaiyama Teruaki 
Published: July 2006

Abstract
It has been found that thiols having functional groups susceptible to hydrolysis and reduction such as acylurea and nitro groups are readily prepared in high yields by simply treating the corresponding thiolesters with cysteamine in acetonitrile at 65°C for 10–40 min.
SPECIFIC BEHAVIOR OF KBF3OH OBSERVED IN PMR ON THE INTERACTION BETWEEN La(III)-NITRILOTRIACETATE CHELATE AND FLUOROBORATES
Authors: Moriguchi Yoshiki 
Published: July 2006

Abstract
The effects of NaF, KBF3OH and NaBF4 on the proton magnetic resonance spectra of La(III)-NTA chelate were investigated in 1:2 molar ratio of La to NTA in H2O solution at 35°C. The remarkable change of PMR spectra occurs in the presence of KBF3OH, which is not explained by simple effect of free F− formed by hydrolysis from BF4− and BF3OH−.
AN EVALUATION OF THE AROMATICITY IN TROPOTHIONE BASED ON C-13 NUCLEAR MAGNETIC RESONANCE
Authors: Machiguchi Takahisa , Inagaki Yoshio , Hoshino Masamatsu , Kitahara Yoshio 
Published: July 2006

Abstract
Analyses of the C-13 FT-NMR spectra of tropothione (I) appeared recently as a new troponoid compound and its parent tropone (II) in dilute solutions are reported in order to evaluate the aromatic character in (I). Polyolefinic character of (I) is confirmed and remarkable differences in chemical shifts between (I) and (II) are observed in accordance with the SCF MO calculations.
β-l-IDOFURANOSE DERIVATIVES CONTAINING HETEROCYCLIC RING AT C-5 AND C-6
Authors: Iwakawa Masaharu , Yoshimura Juji 
Published: July 2006

Abstract
Two pairs of 3-O-benzyl-1,2-O-isopropylidene-β-l-idofuranose derivative containing thiazolidine-2-thione and oxazoline-rings at C-5 and C-6 were synthesized.
ENZYMATIC SYNTHESIS OF SQUALENE ANALOGS FROM GERANYL PYROPHOSPHATE ANALOGS
Authors: Koyama Tanetoshi , Ogura Kyozo , Seto Shuichi 
Published: July 2006

Abstract
8-n-Butylgeranyl pyrophosphate and 10,11-dihydrofarnesyl pyrophosphate act as substrates for the “tail-to-tail” condensation catalyzed by pig liver microsomal enzyme, yielding the corresponding squalene analogs.
CRYSTALLIZATION OF 3Ln2O3·5Ga2O3 GLASSES
Authors: Yajima Seishi , Okamura Kiyohito , Shishido Toetsu 
Published: July 2006

Abstract
The oxide glasses of 3Ln2O3·5Ga2O3 were prepared, using Pr, Nd, Sm, Eu or Gd as a lanthanoid element. Crystallization of the glasses was studied by DTA and X-ray diffraction. A metastable phase was found on the way of the crystallization process of 3Pr2O3·5Ga2O3 and 3Nd2O3·5Ga2O3 glasses terminating in the transition into garnet. However, the phase transition transforming the amorphous phase directly into garnet not through a metastable phase was observed in case of 3Ln2O3·5Ga2O3 glasses (Ln=Sm, Eu or Gd).
A NEW ROUTE FOR SYNTHESIS OF 3,6-DIALKYL-1,4-DIMETHYL-3,6-EPITHIO-AND -3,6-EPIDITHIO-2,5-PIPERAZINEDIONES
Authors: Yoshimura Juji , Nakamura Hiroshi , Matsunari Kenji , Sugiyama Yuichi 
Published: July 2006

Abstract
Five-steps conversion of 3,6-dialkyl-1,4-dimethyl-2,5-piperazinediones into the corresponding 3,6-epithio and -epidithio derivatives: i.e. conversion into 3,3α,6,6α-tetrabromide, substitution of 3,6-bromine atoms with methanol, reduction of 3α,6α-bromine atoms, conversion of 3,6-methoxyl groups into mercapto groups, and then oxidation, is described.
REACTION OF VINYL SULFIDES WITH ALDEHYDES IN THE PRESENCE OF LEWIS ACIDS
Authors: Mukaiyama Teruaki , Kamio Kunimasa , Narasaka Koichi 
Published: July 2006

Abstract
A wide variety of ethyl 3-indenyl sulfides were easily prepared by the reaction of vinyl sulfides with aldehydes in the presence of various Lewis acids such as aluminum chloride.
CIRCULAR DICHROISM OF d-PHENYLGLYCINE
Authors: Takagi Shoji , Nomori Hiroyuki , Hatano Masahiro 
Published: July 2006

Abstract
The vibrational structure in circular dichroism spectrum of d-phenylglycine in the wavelength region corresponding to the α-band of the phenyl chromophore was observed at room temperature and at liquid nitrogen temperature. We analyzed this vibrational structure in comparison with that of l-phenylalanine.
HYDROCRACKING OF 9,10-ANTHRAQUINONE
Authors: Sakai Tomoya , Hattori Masayuki 
Published: July 2006

Abstract
Non-catalytic hydrocracking of 9,10-anthraquinone at 600–900°C proceeded as a typical consecutive reaction yielding fluorenone plus CO in the first step, biphenyl plus CO and benzene in the succeeding steps. The found reaction which is expected to occur for general quinones has an important industrial meaning in the hydrocracking of petroleum heavy residues.
NUCLEOPHILIC SUBSTITUTION AND ELIMINATION REACTIONS ON NITROGEN ATOM—REACTION OF N,N-DIBENZYL-O-p-NITROBENZOYLHYDROXYLAMINE WITH VARIOUS NUCLEOPHILES IN DIPOLAR APROTIC SOLVENT
Authors: Oae Shigeru , Sakurai Tadamitsu , Kozuka Seizi 
Published: July 2006

Abstract
The reactions of N,N-dibenzyl-O-p-nitrobenzoylhydroxylamine (DNH) with nucleophiles were found to give benzaldehyde, benzylamine and p-nitrobenzoate ion in good yields, respectively. It has been suggested that these reactions would proceed via E2 mechanism on the nitrogen atom on the basis of kinetic isotope experiment. Furthermore, SN2 mechanism on the nitrogen atom has been inferred for the reaction of DNH with cyanide ion.
ABSORPTION SPECTRA OF ORIENTED AND AMORPHOUS NAPHTHACENE AND PENTACENE FILMS
Authors: Kamura Yusuke , Shirotani Ichimin , Inokuchi Hiroo , Maruyama Yusei 
Published: July 2006

Abstract
The absorption spectra of the oriented and amorphous naphthacene and pentacene films were measured at room temperature. The electronic state and the reactivity for both states were discussed.
THE MOLECULAR STRUCTURES OF PALLADIUM(II), COPPER(II) AND NICKEL(II) CHELATE OF 1-(2-THIAZOLYLAZO)-2-NAPHTHOL
Authors: Kurahashi Masayasu 
Published: July 2006

Abstract
The structures of palladium(II), copper(II) and nickel(II) chelate of 1-(2-thiazolylazo)-2-naphthol have been determined by X-ray analysis. The coordination configuration around the metal atom has been found to be square-planar, square-pyramidal and octahedral for palladium, copper and nickel, respectively.
SELECTIVE CLEAVAGE OF N-t-BUTOXYCARBONYL PROTECTING GROUP
Authors: Kinoshita Hideki , Kotake Hiroshi 
Published: July 2006

Abstract
The selective cleavage of BOC-peptide-OBut was investigated by the use of 85% formic acid, and it was found that BOC-peptide-OBut gave H-peptide-OBut in good yield by this procedure. This method was also applied to investigation of the selectivity of di-t-butyl esters of dibasic amino acids and N-deprotection of peptides containing these amino acids.