bluuebunny/crossref_metadata_2025_split huggingface dataset:
PROMOTING EFFECT OF BaO ON THE ACTIVITY OF Ni/Al2O3 CATALYST FOR THE HYDROGENATION OF BENZENE AND TOLUENE
Authors: Fujie Hirokazu , Mori Kenji , Tamura Kouji , Okada Sanae , Matsuoka Seiichi , Matsuoka Hiroo 
Published: July 2006

Abstract
The catalytic activity of Ni/Al2O3 for the hydrogenation of benzene and toluene is remarkably enhanced by introduction of a small amount of BaO and the highest activity is obtained with 1.5 wt% BaO. The hydrogenation activity is proportional to the amount of hydrogen chemisorbed on the catalyst and the introduction of BaO into Ni/Al2O3 increases Ni metal surface area.
LEWIS ACID CATALYSED PINACOL REARRANGEMENT–A SHORT SYNTHESIS OF KARAHANAENONE
Authors: Bhushan Vidya , Chandrasekaran Srinivasan 
Published: July 2006

Abstract
The pinacolic coupling reaction has been effectively used to prepare the unsymmetrical pinacol 2 and this key intermediate underwent a smooth ring enlargement to the monoterpene karahanaenone 3, an odoriferous constituent of Japanese hop and Cypress oil.
THE CYANATION OF VINYL HALIDES CATALYZED BY NICKEL(0) COMPLEX GENERATED IN SITU
Authors: Sakakibara Yasumasa , Yadani Nobuichi , Ibuki Ichiro , Sakai Mutsuji , Uchino Norito 
Published: July 2006

Abstract
Nickel(0) species generated in situ from NiBr2(PPh3)2–Zn–PPh3catalyzed the formation of unsaturated nitriles from vinyl halides and potassium cyanide. The reaction proceeded under very mild conditions and was stereoselective.
REDUCTION OF ORGANIC COMPOUNDS WITH LOW-VALENT NIOBIUM (NbCl5/NaAlH4)
Authors: Sato Mitsuyoshi , Oshima Koichiro 
Published: July 2006

Abstract
Carbonyl compounds have been deoxygenatively dimerized to alkenes with the title reagent. Deoxygenation of epoxides to alkenes, reductive coupling of allylic and benzylic alcohols to hydrocarbons, and reduction of alkynes to alkenes are also described.
FUNCTION OF AMIDE GROUP IN SYNTHETIC MULTIDENTATES ON COMPLEXATION TOWARD ALKALI AND ALKALINE EARTH METAL CATIONS
Authors: Nakatsuji Yohji , Kobayashi Hirofumi , Okahara Mitsuo , Matsushima Kenji 
Published: July 2006

Abstract
Several macrocyclic multidentates having one amide group were newly prepared and their complexation property toward Na+, K+, Ca2+, and Ba2+ was examined by the extraction method. The affinity toward Ca2+ was observed and the orientation of the amide group toward the cation was suggested to be important for the molecular design of ligands.
STEREOSELECTIVE SYNTHESIS OF CIS-α,β-EPOXYKETONES VIA DIVALENT TIN ENOLATE
Authors: Mukaiyama Teruaki , Haga Toru , Iwasawa Nobuharu 
Published: July 2006

Abstract
A convenient method for the stereoselective synthesis of cis-β-substituted-α,β-epoxyketone is established employing Sn(OTf)2 mediated cross aldol reaction between α-bromoketone and aldehyde followed by successive treatment of the adduct with KF-dicyclohexyl-18-crown-6.
BIOGENETIC-LIKE BACKBONE REARRANGEMENT. A FORMATION OP D:C-FRIEDOBACCHAR-9(11)-ENE-3β,18β-DIYL LIACETATE FROM 13β,18β-EPOXYBACCHARAN-3β-YL ACETATE
Authors: Suemura Koji , Irokawa Tomomi , Tori Motoo , Ohta Shinya , Moriyama Yoshihiko , Tsuyuki Takahiko , Takahashi Takeyoshi , Itai Akiko , Iitaka Yoichi 
Published: July 2006

Abstract
13β,18β-Epoxybaccharan-3β-yl acetate was treated with BF3·Et2O in acetic anhydride to yield a complex mixture, in which the presence of D:C-friedobacchar-9(11)-ene-3β,18β-diyl diacetate (2) was shown; the product (2) was converted into 18-oxo-D:C-friedobacchar-9(11)-en-3β-yl acetate, the structure of which was confirmed by X-ray diffraction analysis.
A CONVENIENT METHOD FOR THE STEREOSPECIFIC SYNTHESIS OF (E)-3-ALKEN-1-OLS UTILIZING THE RING-OPENING REACTION OF 2,3-DIHYDROFURAN WITH ORGANOCUPRATES
Authors: Fujisawa Tamotsu , Kurita Yoshitsugu , Kawashima Masatoshi , Sato Toshio 
Published: July 2006

Abstract
(E)-3-Alken-1-ols were stereospecifically synthesized in good yields utilizing the regioselective nucleophilic ring-opening reaction of 2,3-dihydrofuran with several kinds of organocuprates under mild conditions.
SIMULTANEOUS EVOLUTION OF HYDROGEN AND OXYGEN BY WATER PHOTOLYSIS WITH PRUSSIAN BLUE AND TRIS(2,2′-BIPYRIDYL)RUTHENIUM(II) COMPLEX
Authors: Kaneko Masao , Takabayashi Naoki , Yamada Akira 
Published: July 2006

Abstract
Simultaneous evolution of hydrogen and oxygen gases was achieved by visible light irradiation of water containig prussian blue and tris(2,2′-bipyridyl)ruthenium(II) complex. The gases evolved were analyzed by gas chromatography and mass spectroscopy. The mechanism for the water photolysis was also discussed.
SYNTHESIS OF (Ba,Pb)TiO3 SOLID SOLUTION HAVING NO COMPOSITIONAL FLUCTUATION
Authors: Kakegawa Kazuyuki , Mohri Jun-ichi , Ishiguro Hiroyuki , Takahashi Koichiro , Shirasaki Shin-ichi 
Published: July 2006

Abstract
A solid solution of (Ba,Pb)TiO3 without compositional fluctuation has not been obtained by an ordinary solid-solid reaction of BaCO3, PbO and TiO2. This was confirmed through the measurements of Δd/d using X-ray diffraction. A new method of preparing (Ba,Pb)TiO3 without compositional fluctuation was developed.
CONVERSION OF METHANOL OVER METAL ION EXCHANGED FORMS OF FLUOR TETRA SILISIC MICA
Authors: Morikawa Yutaka , Goto Tadatoshi , Moro-Oka Yoshihiko , Ikawa Tsuneo 
Published: July 2006

Abstract
The catalytic activities of metal ion exchanged form of fluor tetra silisic mica (Me-TSM) were tested for the conversion of methanol. Although Na- and H-TSM have no activities, some Me-TSM’s show characteristic activities. Ti-TSM exclusively catalyzes the dehydration reaction like an acid catalyst. Cu-TSM dehydrogenates methanol to produce methyl formate selectively.
CHEMILUMINESCENT DETERMINATION OF TRACES OF COPPER(II) BY FLOW INJECTION METHOD
Authors: Yamada Masaaki , Suzuki Shigetaka 
Published: July 2006

Abstract
Chemiluminescence in conjunction with flow injection analysis is described for the determination of traces of copper(II) by means of the flavin mononucleotide-hydrogen peroxide-phosphate buffer system. This permits the determination of copper (II) more selectively than any other chemiluminescent system with a detection limit of 30 pg.
HIGH PERFORMANCE LIQUID CHROMATOGRAPHY OF POTENTIAL ANTITUMOR PLATINUM(II) COMPLEXES OF 1R,2R-CYCLOHEXANEDIAMINE
Authors: Noji Masahide , Achiwa Kyoko , Kondo Asami , Kidani Yoshinori 
Published: July 2006

Abstract
High performance liquid chromatography of antitumor Pt(II) complexes of 1R,2R-cyclohexandiamine, as well as cis- and trans-DDP, dichlorodiammineplatinum(II), has been performed, using a Toyo Soda G1000PW column, eluting with 0.1 mol dm−3 Na2SO4, and various Pt(II) complexes were separated successfully.
A NEW METHOD FOR THE SPECTROPHOTOMETRIC DETERMINATION OF Li(I) WITH A “CROWNED” DINITROPHENYLAZOPHENOL
Authors: Nakashima Kenichiro , Nakatsuji Shin’ichi , Akiyama Shuzo , Kaneda Takahiro , Misumi Soichi 
Published: July 2006

Abstract
A new method for the spectrophotometric determination of Li(I) with a “crowned” dinitrophenylazophenol is proposed, with a range between 25 and 250 ppb of Li(I) in chloroform-dimethylsulfoxide-triethylamine. The method shows both an excellent sensitivity and a fairly good selectivity, and is applied satisfactorily for the analysis of commercial preparations, e.g., lithium carbonate (tablet).
ROTATIONAL ISOMERISM ABOUT SILICON-TO-CARBON SINGLE BONDS
Authors: Nakamura Nobuo , Kohno Motomichi , Oki Michinori 
Published: July 2006

Abstract
1H NMR spectra of the adducts of 9-trimethylsilylanthracene with dimethyl acetylenedicarboxylate and p-quinone are temperature dependent, indicating slow rotation about silicon-to-carbon single bonds, while that of 1,4-dimethoxy-9-trimethylsilyltriptycene is indicative of completely frozen conformation with respect to the Si–C(9) bond.
ANTHRA[1,9-cd:4,10-c′d′]BIS[1,2]DISELENOLE, A NEW ELECTRON DONOR MOLECULE
Authors: Ohnishi Shigeo , Nogami Takashi , Mikawa Hiroshi 
Published: July 2006

Abstract
A new electron donor molecule, anthra[1,9-cd:4,10-c′d’]bis[1,2]diselenole, was synthesized. The charge-transfer complex formed between the donor and TCNQ showed the electrical conductivity of 1 (Ω cm)−1 for a compressed pellet sample.
GENERATION AND TRAPPING OF TETRAMETHYLDIGERMENE
Authors: Sakurai Hideki , Nakadaira Yasuhiro , Tobita Hiromi 
Published: July 2006

Abstract
Tetramethyldigermene, generated for the first time by pyrolysis of 1,4-diphenyl-2,3-benzo-7,7,8,8-tetramethyl-7,8-digermabicyclo[2.2.2]octadiene, was successfully trapped by [4+2] cycloaddition with anthracene and 1,1-dimethyl-2,5-diphenyl-1-silacyclopentadiene.
A SIMPLE ENANTIOSELECTIVE SYNTHESIS OF BOTH ENANTIOMERS OF SULCATOL USING A SINGLE CHIRAL PRECURSOR
Authors: Takano Seiichi , Goto Emiko , Ogasawara Kunio 
Published: July 2006

Abstract
A simple synthesis of (R)-(−)- and (S)-(+)-sulcatol(1), both the aggregation pheromone of Gnathotrichus sulcatus, has been developed using a single chiral precursor.
BAND STRUCTURE OF THE ORGANIC SUPERCONDUCTOR: (TMTSF)2X
Authors: Mori Takehiko , Kobayashi Akiko , Sasaki Yukiyoshi , Kobayashi Hayao 
Published: July 2006

Abstract
Energy band calculation of the organic superconductor (TMTSF)2X was carried out. The ratio of the intermolecular overlap integrals of the highest occupied molecular orbitals parallel and perpendicular to the chain axis is more than ten times smaller than that of TTF-TCNQ. The Fermi surface is a slightly waving plane.
A NOVEL SYNTHESIS OF ROYAL JELLY ACIDS AND QUEEN SUBSTANCE BY THE FIVE CARBON HOMOLOGATION USING β-VINYL-β-PROPIOLACTONE
Authors: Fujisawa Tamotsu , Sato Toshio , Itoh Toshiyuki 
Published: July 2006

Abstract
10-Hydroxy-(E)-2-decenoic acid, (E)-2-decenedioic acid (Royal jelly acids), and 9-oxo-(E)-2-decenoic acid (queen substance) were synthesized via 10-hydroxy-3-decenoic acid and 9,9-ethylenedioxy-3-decenoic acid, respectively, prepared easily by the regioselective ring-opening reaction of β-vinyl-β-propiolactone with Grignard reagents in the presence of copper(I) catalyst.
NEW BUTENOLIDES FROM THE GORGONIAN EUPLEXAURA FLAVA(NUTTING)
Authors: Kikuchi Hiroyuki , Tsukitani Yasumasa , Nakanishi Hajime , Shimizu Iwao , Saitoh Shuichi , Iguchi Kazuo , Yamada Yasuji 
Published: July 2006

Abstract
Four new butenolides (1a–d) were isolated from the Japanese gorgonian Euplexaura flava(Nutting). The structures of these compounds were elucidated from spectral data and chemical reactions.
SYNTHESIS OF 3-OXYGENATED 13-NORHELIANG0LIDES
Authors: Kuroda Chiaki , Hirota Hiroshi , Takahashi Takeyoshi 
Published: July 2006

Abstract
Optically active [3R,6S,7S,1(1O)E,4Z]- and [3R,6R,7S,1(10)E,4Z]-3-methoxymethoxy-13-nor-1(10),4-germacradieno-12,6-lactones, key synthetic intermediates for 3-oxygenated heliangolides, were synthesized from (−)-carvone.
Cu(I)-CATALYZED REACTION OF TERMINAL ALKYNES WITH PHENYL SELENOCYANATE IN THE PRESENCE OF TRIETHYLAMIME. SYNTHESIS OF ALKYNYL SELENIDES1
Authors: tomoda Shuji , Takeuchi Yoshito , Nomura Yujiro 
Published: July 2006

Abstract
Treatment of terminal alkynes with phenyl selenocyanate in dichloromethane in the presence of CuX(X=CN or Br) and triethylamine at room temperature gave 1-phenylseleno-1-alkynes in high yields.
FULLY ALKYLATED CHIRAL DIPHOSPHINES, RDIOP, AND THEIR Rh(I) COMPLEXES
Authors: Tani Kazuhide , Suwa Kenichi , Yamagata Tsuneaki , Otsuka Sei 
Published: July 2006

Abstract
Tetraalkyl analogs of DIOP, (−)-EtDIOP, (−)-i-PrDIOP, and (−)-CyDIOP, have been prepared for the first time by the reaction of (+)-2,3-O-isopropylidene-2, 3-dihydroxy-1,4-difluorobutane and the corresponding lithium dialkylphosphides. These diphosphines form cationic Rh(I) complexes, [Rh{(-)-RDIOP} (NBD)]C104 (R=Et, i-Pr, and Cy), which show remarkable reactivity toward dihydrogen
ON THE THERMOCHROMISM OF A Cu-(N)4-TYPE COPPER(II) CHELATE, BIS(1,5-DIAZA CYCLOOCTANE)COPPER(II) NITRATE
Authors: Yamaki Sayuri , Fukuda Yutaka , Sone Kozo 
Published: July 2006

Abstract
The title complex, [Cu(daco)2](NO3)2, was newly obtained, and found to show a characteristic reversible thermochromism. Its color changes from orange to violet on heating at 90°C, and becomes orange again on cooling. The mechanism of this thermochromism is suggested on the basis of the UV-visible reflectance spectra, and IR and TG-DTA data.
PHOTOCHEMICAL REACTION OF N-METHYL-α,β,γ,δ-TETRAPHENYLPORPHINATOZINC ETHYL. HOMOLYSIS AND SUBSTITUTION WITH VISIBLE LIGHT
Authors: Inoue Shohei , Murayama Hideki , Takeda Norikazu , Ohkatsu Yasukazu 
Published: July 2006

Abstract
N-Methyl-α,β,γ,δ-tetraphenylporphinatozinc ethyl undergoes the homolytic cleavage of the ethyl-zinc group in methylene chloride by the excitation of the porphyrin ring with visible light, resulting in the substitution of a chlorine for the ethyl group.
EFFECT OF STEPWISE DOPING OF Al2O3 AND Li2O ON MICROSTRUCTURE AND ELECTRICAL RESISTIVITY OF ZnO CERAMICS
Authors: Takuma Yasuhisa , Miyayama Masaru , Yanagida Hiroaki 
Published: July 2006

Abstract
Porous and high-resistive ZnO ceramics were obtained by a stepwise doping method of Al2O3 and Li2O. Lithia increased the resistivity of ZnO doped with Al2O3 without a change of porous microstrucrure. The sensitivities of the stepwisely doped specimens to reducing gases at 300°C were improved compared to that of the singly doped specimens.
SELECTIVE ALLYLIC REARRANGEMENT WITH TUNGSTEN CATALYST
Authors: Hosogai Takeo , Fujita Yoshiji , Ninagawa Yoichi , Nishida Takashi 
Published: July 2006

Abstract
Selective thermal rearrangement of allylic alcohols proceeds in the presence of various O=W(OR)4. Ligand catalysts which are more stable than O=W(OR)4 catalyst and are several times more active than O=V(OR)3 catalyst.
MEASUREMENT OF PHOTOCHEMICAL CHANGES OF PRESENSITIZED OFFSET PRINTING PLATES BY FOURIER TRANSFORM INFRARED PHOTOACOUSTIC SPECTROSCOPY
Authors: Teramae Norio , Yamamoto Takeshi , Hiroguchi Masayuki , Matsui Tomoko , Tanaka Shigeyuki 
Published: July 2006

Abstract
Fourier transform infrared photoacoustic spectroscopy(FTIR-PAS) was applied to the measurement of photochemical changes of presensitized offset printing plates. FTIR-PAS was found to be a useful method for obtaining direct information on structural changes of photosensitive resins on roughened metal surface.
A NEW METHOD FOR THE REGIO- AND STEREOSELECTIVE SYNTHESIS OF ALDOLS FROM α-BROMOKETONE AND CARBONYL COMPOUNDS BY USING METALLIC TIN
Authors: Harada Taira , Mukaiyama Teruaki 
Published: July 2006

Abstract
Tin(II) enolates, generated in situ by the oxidative addition of α-bromoketones to metallic tin, react with a variety of carbonyl compounds under mild conditions to give the corresponding aldols in good yields. In the case of reactions of the enolate resulted from α-substituted α-bromoketone with aldehydes, remarkably high erythro-selectivities are attained.
PREPARATION AND OPTICAL RESOLUTION OF COBALT(III) COMPLEXES WITH 2-SELENOLATOETHYLAMINE AND ITS DERIVATIVES
Authors: Konno Takumi , Okamoto Ken-ichi , Hidaka Jinsai 
Published: July 2006

Abstract
Four optical isomers of Co(III) complexes with a coordinated selenium atom, [Co(L)(en)2]2+ or 3+ (L = 2-selenolatoethylamine, 2-selenenatoethylamine, 2-seleninatoethylamine, and 2-(methylseleno)ethylamine), were newly prepared and characterized on the basis of the electronic absorption and circular dichroism (CD) spectra.
ONE-STEP SYNTHESIS OF ω-HYDROXYCARBOXYLIC ACIDS BY THE REACTION OF ω-METALOXYLATED GRIGNARD REAGENTS WITH β-PROPIOLACTONES
Authors: Fujisawa Tamotsu , Mori Toshiki , Kawara Tatsuo , Sato Toshio 
Published: July 2006

Abstract
ω-Metaloxylated Grignard reagents reacted with β-propiolactones chemo- and regioselectively in the presence of Li2CuCl4 to afford ω-hydroxycarboxylic acids in high yields.
A NOVEL ORTHO-SUBSTITUENT EFFECT ON FORMATION OF VINYL CATIONS IN THE PHOTOLYSIS OF VINYL BROMIDES
Authors: Kitamura Tsugio , Muta Tomonobu , Kobayashi Shinjiro , Taniguchi Hiroshi 
Published: July 2006

Abstract
Introduction of a substituent into ortho-position of β-aryl group in a vinyl bromide resulted in the preferential formation of a vinyl cation in the photolysis. It is considered that the steric repulsion of β-aryl groups makes a convenient conformation for an electron transfer from the aromatic ring to the halogen atom in the radical pair.
EXTRACTION-SPECTROPHOTOMETRIC DETERMINATION OF HIGHER CARBOXYLIC ACIDS WITH BIS[2-(5-CHLORO-2-PYRIDYLAZO)-5-DIETHYLAMINOPHENOL] COBALT(III) CHLORIDE
Authors: Seno Kunihiko , Miyata Haruo , Tôei Kyoji 
Published: July 2006

Abstract
Higher carboxylic acid reacts with Bis[2-(5-chloro-2-pyridylazo)-5-diethylaminophenol] cobalt(III) chloride, Co-5-Cl-PADAP, to form a 1:1 ion-pair, which is extracted into chlorobenzene in a single extraction at pH 11. The molar absorptivities of the ion-pairs of C12, C14, C16 and C18 acids are 3.5, 6.6, 7.6 and 7.6×104 1 mol−1 cm−1 at 563 nm, respectively.
A NOVEL SEQUENCE OF DISPLACEMENT REACTIONS OF A DIHALOGENATED Δ4-3-KETOSTEROID
Authors: Koga Toshitaka , Toh Namiko , Nogami Yasuyoshi 
Published: July 2006

Abstract
Acetolysis of 2α,4-dibromocholest-4-en-3-one affords 2β,6β-disubstituted product and the reaction is explained to proceed by the successive SN2 and SN2′ mechanisms.
THERMAL REACTIONS OF PHENYL DERIVATIVES OF DIMETHYLSULFONIUM 1-AROYL-6-OXO-2,4-HEXADIENYLIDE. A REMARKABLE EXAMPLE OF REACTIONS CONTROLLED BY INTRAMOLECULAR STERIC INTERFERENCES
Authors: Toda Takashi , Tokida Akihiko , Mukai Toshio 
Published: July 2006

Abstract
Thermal reactions of the titled compounds showed multiple mode of reactivities and gave variety of products by difference of the number and positions of phenyl groups. Those facts were interpreted in terms of the reaction paths controlled by degree of intramolecular steric interferences of phenyl groups in the dimethylsulfonium 1-aroyl-6-oxo-2,4-hexadienylide system.
SYNTHESES AND REGIOSELECTIVE CYCLOADDITION REACTIONS OF CYCLOHEPT[d]IMIDAZO[1,2-a]IMIDAZOLES (1,3a,9-TRIAZACYCLOPENT[a]AZULENES): FORMATION OF 2,3-DIAZACYCLOHEPTA[ef]CYCL[3.2.2]AZINE SYSTEM
Authors: Abe Noritaka , Nishiwaki Tarozaemon , Yamamoto Hideko 
Published: July 2006

Abstract
Cyclohept[d]imidazo[1,2-a]imidazoles (1,3a,9-triazacyclopent[a]azulenes), being synthesized from 2-aminocycloheptimidazole, was allowed to react with reactive acetylenes to give 2,3-diazacyclohepta[ef]cycl[3.2.2]azines regioselectively.
THERMOCHEMICAL HYDROGEN PRODUCTION BY THE MAGNESIUM-SULFUR-IODINE CYCLE
Authors: Mizuta Susumu , Kumagai Toshiya 
Published: July 2006

Abstract
A new thermochemical cycle for hydrogen production is presented. It consists of (i) redox reaction of sulfur dioxide and iodine with magnesium oxide in an aqueous solution, (ii) hydrolysis of magnesium iodide, (iii) thermal decomposition of magnesium sulfate and (iv) thermal dissociation of hydrogen iodide. Key reactions (i) and (ii) were experimentally verified.
SYNTHESIS OF (±)-DESEPOXY-4,5-DIDEHYDROMETHYLENOMYCIN A
Authors: Takahashi Yasuhiro , Kosugi Hiroshi , Uda Hisashi 
Published: July 2006

Abstract
The reaction of methyl (E)-3-lithio-2-methyl-3-phenylthioprop-2-enoate (4) with methyl (E)-4-(t-butyldimethylsilyloxy)but-2-enoate (5) provides the functionalized cyclopentenone (6) in one step, which is transformed into both Koreeda’s and Smith’s intermediates (2) and (3) for synthesis of (±)-desepoxy-4,5-didehydromethylenomycin A (1).
DISSOLVED NITRATE REDUCTASE IN NATURAL WATER
Authors: Kishibe Kazumi , Fujiwara Kitao , Kobayashi Kensei , Haraguchi Hiroki , Fuwa Keiichiro 
Published: July 2006

Abstract
Nitrate reductase activity dissolved in natural water was detected for the first time. The characteristics of this enzymatic activity were compared with the commercial nitrate reductase in terms of thermal denaturation, inhibitor spectrum, and gel permeation chromatography.
INTRAMOLECULAR PHOTOCHEMICAL REACTIONS OF RIGID DIENONES. PREPARATION AND PHOTOLYSIS OF 10-SUBSTITUTED TRICYCLO [5. 3. 1. 02,6] UNDECA-3,9-DIEN-8-ONES AND -4,9-DIEN-8-ONES
Authors: Ogino Toshio , Awano Kazuyuki 
Published: July 2006

Abstract
A series of the title compounds (R=OMe, H, Me, Ph) were prepared and photochemical behaviors of these compounds were examined. Although most of the substrates underwent intramolecular [2+2] cycloaddition to give novel trishomocubanes upon irradiation, the phenyl derivative of Δ4 isomer gave a product via competing allylic hydrogen abstraction, as well as the cyclization product.
THE CATALYTIC ACTIVITY OF A NOVEL SILICA-SUPPORTED COPPER CATALYST FOR THE CO OXIDATION WITH N2O
Authors: Kakuta Noriyoshi , Kazusaka Akio , Miyahara Koshiro 
Published: July 2006

Abstract
A novel silica-supported copper catalyst, prepared from cupric acetate monohydrate having a dimeric structure of cupric ions, showed a very high activity for the CO oxidation with N2O at 150°C as compared with a conventional silica-supported copper catalyst. It was suggested on the basis of the ESR spectroscopic characterization that such an extraordinary catalytic activity resulted from the structure of the Cu2+ ions derived from cupric acetate monohydrate on silica.
ATMOSPHERE DEPENDENT PHOTOREACTION OF METHYL 4-PYRIDINECARBOXYLATE IN METHANOL. METHOXYLATION AT 3-POSITION UNDER O2 AND METHOXYLATION AND HYDROXYMETHYLATION AT 2-POSITION UNDER N2
Authors: Sugiyama Toru , Yagi Kazuya , Ito Yoko , Sugimori Akira 
Published: July 2006

Abstract
The UV-Irradiation of methyl 4-pyridinecarboxylate in methanol under oxygen in the presence of H2SO4 brings about methoxylation at the 3-position of the pyridine ring, while under nitrogen methoxylation and hydroxymethylation occur at the 2-position.
ACTIVATION OF CONVENTIONAL S-PROTECTING GROUPS OF CYSTEINE BY CONVERSION INTO THE 3-NITRO-2-PYRIDINESULFENYL (NPYS) GROUP
Authors: Matsueda Rei , Higashida Susumu , Ridge Richard J , Matsueda Gary R 
Published: July 2006

Abstract
All of the conventional S-protecting groups of cysteine which were tested could be selectively converted to the 3-nitro-2-pyridinesulfenyl (Npys) group after treatment with an appropriate Npys halide. Unidirectional formation of an unsymmetrical disulfide bond is possible when Cys (Npys) is mixed with a free thiol of another Cys residue. Some of these features were exploited during the solid phase synthesis of lysine8-vasopressin.
AN OPTICALLY ACTIVE COBALT(III)-SELENIDE COMPLEX. INVERSION AT SELENIUM IN TWO ISOMERS OF THE [2-(METHYLSELENO)ETHYLAMINE][TRIS(2-AMINOETHYL)AMINE]COBALT(III) ION
Authors: Nakajima Kiyohiko , Kojima Masaaki , Fujita Junnosuke 
Published: July 2006

Abstract
The optically active selenide complex, trans(tertiary amine nitrogen, Se)-[Co(CH3SeCH2CH2NH2){N(CH2CH2NH2)3}]3+, has been obtained for the first time by SP-Sephadex column chromatography. It loses ca. 50% of optical activity in 1 h at 22°C in 1 mol/dm3 NaClO4.
4-O-BENZYL-2,3-O-ISOPROPYLIDENE-l-THREOSE —A NEW AND USEFUL BUILDING BLOCK FOR THE SYNTHESES OF l-SUGARS—
Authors: Mukaiyama Teruaki , Suzuki Keisuke , Yamada Tohru 
Published: July 2006

Abstract
4-O-Benzyl-2,3-O-isopropylidene-l-threose (1), a new building block for the synthesis of carbohydrates was prepared. The stereoselective addition of various nucleophiles to 1 afforded useful intermediates toward l-sugar derivatives.
STEREOSELECTIVE SYNTHESIS OF (E)-, (E,Z)- AND (E,E)-CONJUGATED DIENES VIA ALKYLATION OF 3-SULFOLENES AS KEY STEP
Authors: Yamada Sachiko , Ohsawa Hideto , Suzuki Takayoshi , Takayama Hiroaki 
Published: July 2006

Abstract
Stereoselective method for synthesizing (E)-, (E,Z)- and (E,E)-conjugated dienes via alkylation of 3-sulfolenes as key step is developed. Sex pheromones with (E)- and (E,E)-conjugated diene structures are synthesized with exclusively high stereoselectivity by applying the method.
CATALYTIC GASIFICATION OF WOOD FOR METHANOL SYNTHESIS GAS
Authors: Yamazaki Kenji , Yamaguchi Tsuyoshi , Tanaka Yoshinori , Ueno Akifumi , Kotera Yoshihide 
Published: July 2006

Abstract
Gas composed of hydrogen and carbon monoxide with 2:1 volume ratio was supplied by catalytic gasification of wood, when NiO/Al2O3 catalyst was employed at 700°C in the presence of water vapor.