bluuebunny/crossref_metadata_2025_split huggingface dataset:
ONE-ELECTRON PHOTOREDUCTION OF N,N′-1,3-PROPANO-BRIDGED INDIGO
Authors: Setsune Jun-ichiro , Matsuura Toshikazu , Fujiwara Takashi , Kitao Teijiro 
Published: July 2006

Abstract
N,N′-1,3-Propano-bridged indigo was reduced by one electron to the semi-reduced radical when irradiated by visible light (λ &gt; 500 nm) in a deaerated benzene solution containing triethylamine whereas N,N′-dimethylindigo and N,N′-diacetylindigo were reduced by two electrons to their leuco forms under the same reaction conditions.
AMPEROMETRIC GAS SENSOR USING SOLID STATE PROTON CONDUCTOR SENSITIVE TO HYDROGEN IN AIR AT ROOM TEMPERATURE
Authors: Miura Norio , Kato Hiroshi , Ozawa Yoshihiro , Yamazoe Noboru , Seiyama Tetsuro 
Published: July 2006

Abstract
A new type of amperometric gas sensor using a proton conductor (antimonic acid) and its working mechanisms are proposed for detecting small amounts of H2 in air at room temperature. The short circuit current of the sensor cell was found to be proportional to the concentration of H2. It is also shown that the sensor could be modified into a simpler construction where the reference gas (air) is no longer necessary.
THE SYNTHESIS OF SILICON OXYNITRIDE FIBERS BY NITRIDATION OF POLYCARBOSILANE
Authors: Okamura Kiyohito , Sato Mitsuhiko , Hasegawa Yoshio , Amano Tadaaki 
Published: July 2006

Abstract
Silicon oxynitride fibers were synthesized by the reaction of polycarbosilane in NH3 gas. The fibers were in the amorphous state and transparent in visible light. The tensile strength and Young’s modulus of the fibers obtained at 1300 °C were 1.80±0.37 and 139±17 GPa, respectively
119Sn NMR SPECTROSCOPIC INVESTIGATION OF TETRABUTYLDISTANOXANES
Authors: Otera Junzo , Yano Toru , Nakashima Koji , Okawara Rokuro 
Published: July 2006

Abstract
119Sn FT NMR spectra proved to differentiate tin atoms in dimeric tetrabutyldistanoxanes successfully. Tentative assignment of 119Sn NMR spectra was achieved for the first time.
NEW QUASSINOID GLYCOSIDES AND HEMIACETALS FROM PICRASMA AILANTHOIDES PLANCHON. PICRASINOSIDE-B,-C,-D,-E,-F, AND -G, AND PICRASINOL-A AND -B
Authors: Okano Masayoshi , Fujita Tomoyuki , Fukamiya Narihiko , Aratani Takaaki 
Published: July 2006

Abstract
New quassinoid glucosides, picrasinoside-B,-C,-D,-E,-F, and -G, and quassinoid hemiacetals, picrasinol-A and -B, were isolated from the bark of Piorasma ailanthoides PLANCHON, and their structures are established by spectral analysis and chemical transformations.
EFFECT OF SOLVENT COMPOSITION ON ELECTROCHEMICAL SPECTRAL SENSITIZATION AT THE SnO2/RHODAMINE B INTERFACE
Authors: Nakao Masashi , Watanabe Tadashi , Honda Kenichi 
Published: July 2006

Abstract
The anodic sensitized photocurrent at a SnO2 electrode in contact with a dye-containing acetonitrile-water mixed electrolyte solution depends remarkably on the solvent composition, due to a change in the adsorption behavior of the dye.
HYDROXYDICTYODIAL, A NEW ANTIFEEDANT DITERPENE FROM THE BROWN ALGA DICTYOTA SPINULOSA
Authors: Tanaka Jun’ichi , Higa Tatsuo 
Published: July 2006

Abstract
Hydroxydictyodial, an antifeedant diterpene and a key intermediate in the biogenesis of several related diterpenes, has been isolated from the brown alga Dictyota spinulosa, and its structure was determined by spectroscopic analysis and chemical transformation.
2-BENZYLOXY-1-PROPENE: A NOVEL PROTECTIVE REAGENT OF HYDROXYL GROUPS
Authors: Mukaiyama Teruaki , Ohshima Masahiro , Murakami Masahiro 
Published: July 2006

Abstract
Hydroxyl compounds are easily protected on treatment with 2-benzyloxy-1-propene, a novel hydroxyl protective reagent, in the presence of a catalytic amount of dichloro(1,5-cyclooctadiene)palladium (II). The deprotection to regenerate the parent hydroxyl compounds is also readily carried out by catalytic hydrogenation under neutral conditions.
A FORMAL TOTAL SYNTHESIS OF POLYOXIN J USING 4-O-BENZYL-2,3-O-ISOPROPYLIDENE-l-THREOSE AS A COMMON CHIRAL BUILDING BLOCK
Authors: Tabusa Fujio , Yamada Tohru , Suzuki Keisuke , Mukaiyama Teruaki 
Published: July 2006

Abstract
A convergent formal total synthesis of Polyoxin J was achieved. Two fragments, deoxypolyoxin C and 5-O-carbamoylpolyoxamic acid, were synthesized in a highly stereoselective manner from the common chiral building block, 4-O-benzyl-2,3-O-isopropylidene-l-threose, finishing the formal synthesis of Polyoxin J.
STEREOSELECTIVE SYNTHESIS OF α-RIBONUCLEOSIDES FROM 1-HYDROXY SUGARS BY USING 2-FLUOROPYRIDINIUM TOSYLATE
Authors: Mukaiyama Teruaki , Hashimoto Yukihiko , Hayashi Yujiro , Shoda Shin-ichiro 
Published: July 2006

Abstract
A novel method for the preparation of α-ribonucleosides was developed by the use of 2-fluoro-1-methylpyridinium tosylate as a condensing reagent. Various α-ribonucleosides were synthesized from 1-hydroxy sugars and trimethylsilylated nitrogen compounds, such as nucleoside bases and azide, in good yields under mild conditions.
OXIDATION OF AZULENE DERIVATIVES. AUTOXIDATION OF GUAIAZULENE IN A POLAR APROTIC SOLVENT
Authors: Nozoe Tetsuo , Takekuma Shin-ichi , Doi Masashi , Matsubara Yoshiharu , Yamamoto Hiroshi 
Published: July 2006

Abstract
Autoxidation of guaiazulene at 100 °C in N,N-dimethylformamide afforded twenty-three separable products including seven known compounds. Most of these new compounds possess highly interesting structures of azulenoquinone, inden-1-one, benzocyclobutadiene, naphthoquinone, and dimeric forms.
PREDICTION OF ROTAMERIC PREFERENCES IN 9-(1-METHOXYETHYL)TRIPTYCENE DERIVATIVES BY MOLECULAR FORCE FIELD CALCULATIONS
Authors: Abe Kazuhisa , Hirota Minoru , Yamamoto Gaku , Oki Michnori 
Published: July 2006

Abstract
The rotamer distributions and the optimized geometries of peri-substituted 9-(1-methoxyethyl)triptycene derivatives were determined by means of molecular force-field calculations (MM2). The results agreed well with those from the NMR experiments except for the derivative containing the intramolecular hydrogen bonding.
STRUCTURE OF TWO STRESS METABOLITES, SPIROBROUSSONIN A AND B, FROM DISEASED PAPER MULBERRY
Authors: Takasugi Mitsuo , Niino Nobuyuki , Anetai Masaki , Masamune Tadashi , Shirata Akira , Takahashi Kokichi 
Published: July 2006

Abstract
The fungus-inoculated Broussonetia papyrifera shoot cortical tissues produced two stress metabolites named spirobroussonin A and B. Structure elucidation of these compounds is described.
ACCELERATION OF SOLID–LIQUID TWO-PHASE REACTION BY MEANS OF ALUMINA-WATER-ULTRASOUND. A SUBSTITUTE FOR A PHASE TRANSFER CATALYST
Authors: Ando Takashi , Kawate Takehiko , Yamawaki) Junko Ichihara (nee , Hanafusa Terukiyo 
Published: July 2006

Abstract
Combined use of alumina, a trace of water, and ultrasound greatly accelerated a solid–liquid two-phase nucleophilic substitution by cyanide ion in nonpolar organic solvents. The efficiency under the optimum conditions were compared with that of phase transfer catalysts such as 18-crown-6.
HIGHLY STEREOSELECTIVE PROCEDURE FOR (6R)-TETRAHYDROBIOPTERIN COFACTOR
Authors: Matsuura Sadao , Murata Shizuaki , Sugimoto Takashi 
Published: July 2006

Abstract
(6R)-Tetrahydrobiopterin cofactor for aromatic amino acid hydroxylases was synthesized stereoselectively by catalytic hydrogenation of biopterin over platinum oxide at pH 11.4 and subsequent crystallization from hydrochloric acid and ethanol.
ASYMMETRIC REDUCTION OF ACETOPHENONE WITH CHIRAL REAGENTS FROM LITHIUM TETRAHYDROALUMINATE AND CHIRAL 1,2-DIOL OR DIAMINE AS STUDIED BY ALUMINUM-27 NUCLEAR MAGNETIC RESONANCE
Authors: Yamashita Junzo , Tomiyama Shigemi , Hashimoto Harukichi , Kitahara Keiichi , Sato Hisao 
Published: July 2006

Abstract
Asymmetric reduction of acetophenone with chiral reagents from lithium tetrahydroaluminate and (1S,2S)-1,2-diphenylethanediol or (1S,2S)-N,N′-diethyl-1,2-diphenylethanediamine in the presence or absence of added ethanol is studied by aluminum-27 NMR spectroscopy.
CIRCULAR DICHROISM INDUCED ON ARYLMETHYL CARBANIONS
Authors: Okamoto Yoshio , Takeda Takahiro , Hatada Koichi 
Published: July 2006

Abstract
Circular dichroism spectra of fluorenyllithium, benzyllithium, diphenylmethyllithium, triphenylmethyllithium, and 1,1-diphenylhexyllithium were measured in the presence of chiral tertiary diamines, (−)-sparteine, (+)- and (−)-2,3-dimethoxy-1,4-bis(dimethylamino)butane. All the carbanions showed induced circular dichroism (ICD) in nonpolar mediums.
REACTIONS OF NITRONES BEARING AN OLEFINIC DIPOLAROPHILE WITH DIMETHYL ACETYLENEDICARBOXYLATE. INTER- AND INTRAMOLECULAR DOUBLE 1,3-DIPOLAR CYCLOADDITIONS
Authors: Tsuge Otohiko , Ueno Kazunori , Kanemasa Shuji 
Published: July 2006

Abstract
The reaction of nitrones, derived from benzaldehydes having an olefinic dipolarophile at the o-position, with DMAD provides the first example for the inter- and intramolecular double 1,3-dipolar cycloaddition.
DEALUMINATION OF ZSM-5 ZEOLITE. SELECTIVE REMOVAL OF ALUMINUM ON EXTERNAL SURFACE OF ZEOLITE CRYSTALLITES
Authors: Namba Seitaro , Inaka Akira , Yashima Tatsuaki 
Published: July 2006

Abstract
Upon the SiCl4 treatment at 723–923 K the dealumination of NaZSM-5 zeolite took place without destruction of zeolite structure. At the higher temperature the more selective removal of framework aluminum on the external surface of zeolite crystallites was performed.
INTRAMOLECULAR ALLYLATION OF CARBONYL COMPOUNDS. A NEW METHOD FOR FIVE AND SIX MEMBERED RING FORMATION
Authors: Nokami Junzo , Wakabayashi Shoji , Okawara Rokuro 
Published: July 2006

Abstract
By using metallic tin and aluminum in an aqueous medium, ketone having allylic-halides functionality can be cyclized to form five and six membered rings.
A FACILE SYNTHESIS OF α-GLUCOSIDES AND α-RIBOSIDES FROM THE CORRESPONDING 1-O-ACYL SUGARS AND ALCOHOLS IN THE PRESENCE OF TRITYL PERCHLORATE
Authors: Mukaiyama Teruaki , Kobayashi Shu , Shoda Shin-ichiro 
Published: July 2006

Abstract
In the presence of trityl perchlorate, 1-O-bromoacetyl-β-d-glucose stereoselectively reacts with alcohols to give the corresponding α-glucosides in good yields. The similar reaction of 1-O-acetyl-β-d-ribose affords the corresponding β-ribosides exclusively, while in the presence of molecular sieves 4A and lithium perchlorate, α-ribosides are prepared predominantly in good yields.
A POTENTIOMETRIC OXYGEN SENSOR USING LaF3 SINGLE CRYSTAL OPERATIVE AT ROOM TEMPERATURE
Authors: Kuwata Shigeki , Miura Norio , Yamazoe Noboru , Seiyama Tetsuro 
Published: July 2006

Abstract
The electromotive force (EMF) of a solid-electrolyte cell using LaF3 single crystal was found to respond to a change of oxygen partial pressure even at 25 °C, in accordance with the Nernst’s law. The 90% response time of this sensor was as short as ca. 3 min at 25 °C.
NOVEL ASYMMETRIC ALKYLATION OF CYCLIC β-KETO ESTERS WITH OPTICALLY ACTIVE SULFONIUM SALTS
Authors: Kobayashi Michio , Umemura Kazuyuki , Watanabe Nobuko , Matsuyama Haruo 
Published: July 2006

Abstract
A new asymmetric alkylation of cyclic β-keto esters with optically active sulfonium salts, which are easily prepared by optical resolution methods, has been investigated. Relative reactivities for alkyl substituents are found to be quite different from those for SN2 alkylation. Stereochemical reaction course via S–O sulfurane intermediate for this new reaction is proposed.
EFFICIENT PREPARATION OF POLYSUBSTITUTED 1,3-DIENES FROM α,α′-DIKETO SULFIDES
Authors: Nakayama Juzo , Machida Haruki , Saito Ryuji , Akimoto Keiichi , Hoshino Masamatsu 
Published: July 2006

Abstract
A series of polysubstituted 1,3-dienes were prepared in good overall yields in three steps starting from readily accessible α,α′-diketo sulfides.
NEGATIVE MAGNETORESISTANCE AND ANDERSON LOCALIZATION IN BLACK PHOSPHORUS SINGLE CRYSTALS
Authors: Iwasaki Noriko , Maruyama Yusei , Kurihara Susumu , Shirotani Ichimin , Kinoshita Minoru 
Published: July 2006

Abstract
The electrical resistance of black phosphorus single crystals at low temperatures was analyzed as functions of temperature and magnetic field. Logarithmic dependence of the conductivity on both variables was found. This fact, together with the negative magnetoresistance observed at 4.2 K, suggests the existence of the two dimensional Anderson localization of valence-band holes in black phosphorus single crystals at low temperatures.
STRUCTURE OF NEW BROMODITERPENES, PINNATOLS, FROM THE MARINE RED ALGA LAURENCIA PINNATA YAMADA
Authors: Fukuzawa Akio , Miyamoto Mitsuaki , Kumagai Yoshikazu , Abiko Atsushi , Takaya Yoshiaki , Masamune Tadashi 
Published: July 2006

Abstract
The structure of new bromoditerpenes named pinnatols A, B, C,and D, isolated from the title alga, was determined on the basis of the chemical and spectral data.
SYNTHESES OF NEW [2.2]PYRIDINOPHANES
Authors: Kawashima Toshihide , Kurioka Shiroh , Tohda Yasuo , Ariga Masahiro , Mori Yutaka , Misumi Soichi 
Published: July 2006

Abstract
Six meta-bridged [2.2]pyridinophanes including three new compounds are synthesized successfully via the corresponding cyclic disulfides. Electronic effect of nitrogen atoms in pyridine rings constructed in a [2.2]metacyclophane-like stepped form is studied on the basis of their 1H and 13C NMR spectra.
OXYGEN-SORPTIVE PROPERTIES OF DEFECT PEROVSKITE-TYPE La1−xSrxCo1−yFeyO3−δ
Authors: Teraoka Yasutake , Zhang Hua-Min , Yamazoe Noboru 
Published: July 2006

Abstract
The substitution of Fe for Co of La1−xSrxCoO3−δ makes it possible to preserve perovskite-type structure at higher Sr contents. While the amount of oxygen reversibly absorbed or desorbed was mostly determined by the Sr content, the Fe substitution was found to enhance the oxygen desorption particularly in a lower temperature region as well as catalytic activities.
PHOTOCHEMICAL ACTIVATION OF ALUMINUM–ALKYL BOND IN ALUMINUM PORPHYRIN. CONJUGATE ADDITION REACTION WITH VINYL KETONE
Authors: Murayama Hideki , Inoue Shohei 
Published: July 2006

Abstract
Tetraphenylporphinatoaluminum ethyl undergoes addition reaction toward vinyl ketone via a novel enolate aluminum porphyrin as the intermediate. This reaction is remarkably accelerated upon irradiation with visible light retaining the reaction mode.
ON THE REACTION OF N-VINYLIMINOPHOSPHORANES. SYNTHESIS AND REACTION OF 1,2-λ5-AZAPHOSPHORINE RING SYSTEM
Authors: Kobayashi Tomoshige , Nitta Makoto 
Published: July 2006

Abstract
The reaction of N-vinyliminotrimethoxyphosphorane reacts with electron deficient acetylenes results in the formation of formal [4+2] cycloadducts, 1,2-λ5-azaphosphorines 4a-c. However, N-vinyliminotriphenylphosphorane reacts with dimethyl acetylenedicarboxylate (DMAD) in a formal [2+2] manner. The product 4a or 4b also reacts with DMAD to give λ5-phosphorine derivatives.
4,8-BIS(DICYANOMETHYLENE)-4,8-DIHYDROBENZO[1,2-c:4,5-c′]DITHIOPHENE. A NEW ELECTRON ACCEPTOR
Authors: Kobayashi Keiji 
Published: July 2006

Abstract
The title compound was designed as a new acceptor and was synthesized from the corresponding quinone and malononitrile. Electrochemical studies suggested that the molecule is not so much distorted as tetracyanoanthraquinodimethane.
XPS EVIDENCE FOR THE ORDER IN STABILITIES OF N,N,O-TERDENTATE COMPLEXES OF 2-(2-PYRIDYLAZO)PHENOLIC LIGAND WITH THE DIVALENT METALS
Authors: Kudo Yoshihiro , Yoshida Noboru , Fujimoto Masatoshi , Tanaka Katsumi , Toyoshima Isamu 
Published: July 2006

Abstract
The core electron binding energies of N(ls) and O(ls) in the eight complexes of an N,N,O-terdentate ligand, 5-dimethylamino-2-(2-pyridylazo)phenol, with divalent transition metals were measured by means of X-ray photoelectron spectroscopy (XPS). The results indicate that the thermodynamic stabilities of the N,N,O-terdentate chelates are controlled by the extent of the electron localization between the central metal and the donor nitrogen (azo and pyridyl) and oxygen (phenolate) atoms.
SEPARATION OF XYLENE ISOMERS BY PERVAPORATION THROUGH A HIGHLY PERMSELECTIVE POLYMER MEMBRANE HAVING DINITROPHENYL GROUP
Authors: Ishihara Kazuhiko , Matsui Kiyohide , Fujii Hideyuki , Nishide Hiroyuki , Shinohara Isao 
Published: July 2006

Abstract
The separation of xylene isomers was carried out by pervaporation through a polymer membrane having a dinitrophenyl group. The polymer membrane was effective for selective permeation of m-xylene from the mixture of xylene isomers. This selectivity can be attributed to the difference in the charge-transfer complexing ability between xylene isomers and the dinitrophenyl group.
PRODUCTION OF CO AND CH4 IN ELECTROCHEMICAL REDUCTION OF CO2 AT METAL ELECTRODES IN AQUEOUS HYDROGENCARBONATE SOLUTION
Authors: Hori Yoshio , Kikuchi Katsuhei , Suzuki Shin 
Published: July 2006

Abstract
The total analysis of gaseous and soluble products was carried out in the electrochemical reduction of CO2 (current density 5 mA cm−2) on various electrode metals. HCOO− was predominantly produced at Cd, In, Sn, and Pb cathodes. Ag and Au principally gave CO. CH4 was formed in an appreciable amount at Cu cathode.
RHODIUM-CATALYZED HYDROFORMYLATION OF FORMALDEHYDE IN PYRIDINES
Authors: Okano Tamon , Makino Masahiko , Konishi Hisatoshi , Kiji Jitsuo 
Published: July 2006

Abstract
The use of pyridines as a solvent greatly enhances the catalytic activity of RhCl(CO)(PPh3)2 for the hydroformylation of formaldehyde. The yield of glycol aldehyde goes up to over 90% under mild conditions. At temperatures above 100 °C, however, the reaction is complicated by the aldol addition of glycol aldehyde yielding straight-chain sugars.
PALLADIUM ASSISTED OXIDATION OF CYCLOPENTENE BY MOLECULAR OXYGEN
Authors: Takehira Katsuomi , Hayakawa Takashi , Orita Hideo 
Published: July 2006

Abstract
Dichlorobis(N,N-dialkylacetamide)palladium(II) complex catalyzes the oxidation of cyclopentene to cyclopentanone by molecular oxygen in alcoholic solvent, in which one atom of molecular oxygen in incorporated.
INTRODUCTION OF gem-DILKYL GROUP TO HEXOFURANOSE BY ORTHO ESTER CLAISEN REARRANGEMENT
Authors: Tadano Kin-ichi , Idogaki Yoko , Yamada Hirohiko , Suami Tetsuo 
Published: July 2006

Abstract
The ortho ester Claisen rearrangement of d-ribo- or l-lyxo- hexofuranose derivative which possesses an allyl alcohol functionality on C-3, proceeds stereoselectively to give a 3-C-dialkylated product. The stereochemistry of a newly introduced quaternary center of the product was unambiguously established by a chemical modification.
PALLADIUM CATALYZED REACTION OF BUTADIENE MONOXIDE WITH CARBON DIOXIDE
Authors: Fujinami Tatsuo , Suzuki Takehiro , Kamiya Masakuni , Fukuzawa Shin-ichi , Sakai Shizuyoshi 
Published: July 2006

Abstract
Carbon dioxide readily reacts with 1,3-butadiene monoxide in the presence of a catalytic amount of tetrakis(triphenylphosphine)palladium under ordinary pressure at 0 °C to afford vinylethylene carbonate in a quantitative yield.
CATALYTIC ACTIVITY- AND SELECTIVITY-CONTROL FOR OXIDATIVE COUPLING OF METHANE BY OXYGEN-PUMPING THROUGH YTTRIA-STABILIZED ZIRCONIA
Authors: Otsuka Kiyoshi , Yokoyama Seiichiro , Morikawa Akira 
Published: July 2006

Abstract
Oxidative coupling of methane over Ag and Bi2O3–Ag were carried out by the electrochemically pumped oxygen through yttria-stabilized zirconia at 973 K. The oxygen pumped to the Bi2O3–Ag catalyst showed higher catalytic activity and selectivity for the production of C2-compounds (C2H4+C2H6) compared to the surface oxygen from gas phase.
ENANTIOSELECTIVE CONJUGATE ADDITION REACTION MEDIATED BY CHIRAL LIGANDS
Authors: Tomioka Kiyoshi , Sudani Mineichi , Shinmi Yuichi , Koga Kenji 
Published: July 2006

Abstract
Chiral ligand mediated enantioselective conjugate addition reaction of lithiated dithioacetal derivative with prochiral α,β-unsaturated ester gives the corresponding adduct in 67% enantiomeric excess.
AN EFFICIENT METHOD FOR THE PREPARATION OF THREO CROSS-ALDOLS FROM SILYL ENOL ETHERS AND ALDEHYDES USING TRITYL PERCHLORATE AS A CATALYST
Authors: Mukaiyama Teruaki , Kobayashi Shu , Murakami Masahiro 
Published: July 2006

Abstract
Threo cross-aldol products are predominantly formed in good yields by treating tert-butyldimethylsilyl enol ethers with aldehydes in the presence of a catalytic amount of trityl perchlorate.
THE CATALYSTS ACTIVE AND SELECTIVE IN OXIDATIVE COUPLING OF METHANE
Authors: Otsuka Kiyosbi , Jinno Kiyotaka , Morikawa Akira 
Published: July 2006

Abstract
Active and selective catalysts in oxidative coupling of methane were looked for over many metal oxides (25 oxides). In general, the oxides of rare earth elements showed higher C2-sel ectiviti.es than 75%. Among the metal oxides tested, Sm2O3 was the most active and selective catalyst in the formation of C2-compounds (selectivity 93%).
A HIGHLY REGIO- AND STEREOSELECTIVE RING-OPENING OF 2,3-EPOXY ALCOHOLS WITH TRIMETHYLSILYL AZIDE-DIETHYLALUMINUM FLUORIDE SYSTEM
Authors: Maruoka Keiji , Sano Hiromi , Yamamoto Hisashi 
Published: July 2006

Abstract
A new approach to the mild and selective synthesis of 3-azidodiols has been described which involves a highly regio-and stereoselective ring-opening of 2,3-epoxy alcohols with trimethylsilyl azide and diethylaluminum fluoride.
1H-NMR SPECTROSCOPIC EVIDENCE ON CHIRAL DISCRIMINATION OF dl-PIRPROFEN BY β-CYCLODEXTRIN COMPLEXATION
Authors: Uekama Kaneto , Imai Teruko , Hirayama Fumitoshi , Otagiri Masaki , Hibi Toru , Yamasaki Masaki 
Published: July 2006

Abstract
The chiral discrimination of β-cyclodextrin (β-CyD) was demonstrated by measuring 270 MHz 1H-NMR spectra, using dl-pirprofen (PF) as a guest molecule. Upon binding to β-CyD, the induced 1H-chemical shifts of PF, particularly in the phenylpropionic acid portion, were significantly different between the d- and l-isomers, while no enantiometric difference was observed in the absence of β-CyD.
THE OXIDATION OF HYDROXYLAMINE BY FREMY’S SALT. PREPARATION OF N-NITROSAMINES AND TETRAZENES
Authors: Tato M P Vazaquez , Castedo Luis , Riguera Ricardo 
Published: July 2006

Abstract
Treatment of secondary amines with Fremy’s salt in aqueous sodium carbonate solution and in the presence of hydroxylamine gives a high yield of either N-nitrosamines or sym-tetrazenes. A mechanism for these conversions is proposed.
REDUCTION OF ALDEHYDES AND KETONES TO ALCOHOLS WITH HYDROUS ZIRCONIUM OXIDE AND 2-PROPANOL
Authors: Matsushita Hajime , Ishiguro Shigeo , Ichinose Hiroshi , Izumi Akira , Mizusaki Shigenobu 
Published: July 2006

Abstract
Reduction of aldehydes and ketones with 2-propanol was found to proceed efficiently in the presence of hydrous zirconium oxide. The reaction is performed simply and the products are easily isolated in the pure state by filtering off the hydrous zirconium oxide, followed by evaporation of solvents.
NEW LIQUID CRYSTALLINE COMPOUNDS. 2-(p-CYANOPHENYL)-5-ALKYL-1,3-OXATHIANES
Authors: Haramoto Yuichiro , Kamogawa Hiroyoshi 
Published: July 2006

Abstract
2-(p-Cyanophenyl)-5-alkyl-1,3-oxathianes having the monotropic nematic liquid-crystal phase around room temperature were synthesized and their liquid-crystal behavior was compared with those of the corresponding 1,3-dithianes and 1,3-dioxanes.
OXIDATION OF 2-METHYLNAPHTHALENE TO 2-METHYL-1,4-NAPHTHOQUINONE WITH HYDROGEN PEROXIDE IN THE PRESENCE OF Pd(II)-POLYSTYRENE SULFONIC ACID RESIN
Authors: Yamaguchi Satoru , Inoue Masami , Enomoto Saburo 
Published: July 2006

Abstract
The oxidation of 2-methylnaphthalene was carried out in acetic acid with aqueous(60%) hydrogen peroxide in the presence of Pd(II)-polystyrene sulfonic acid resin. 2-Methyl-1,4-naphthoquinone was obtained in a yield of 50 to 60% at 50 °C for 8 h. The catalysts recovered by the filtration were reusable.
HIGH CATALYTIC ACTIVITY OF CsCl SUPPORTED ON SILICA GEL FOR THE SELECTIVE DEHYDROCHLORINATION OF 1,1,2-TRICHLOROETHANE
Authors: Mochida Isao , Miyazaki Tatsuro , Takagi Takeshi , Fujitsu Hiroshi 
Published: July 2006

Abstract
CsCl supported on a particular silica gel dryed at 120 °C exhibited a remarkable activity for the selective dehydrochlorination of TCE into 1,1-DCE after the calcination around 500 °C. The proper heat-treatment before and after the impregnation of CsCl on the silica gel strongly influenced the activity of the catalyst.