bluuebunny/crossref_metadata_2025_split huggingface dataset:
New Electron Acceptors of Condensed-Thiophene TCNQ Type
Authors: Yui Koji , Ishida Hideki , Aso Yoshio , Otsubo Tetsuo , Ogura Fumio 
Published: July 2006

Abstract
Two conjugated homologues of thiophene-TCNQ, i.e., 2,5-bis(dicyanomethylene)-2,5-dihydrothieno [3,2-b ] thiophene and 2,6-bis(dicyanomethylene)-2,6-dihydrodithieno[3,2-b:2′,3′-d]thiophene have been prepared as potential acceptors. They form charge-transfer complexes with TTF or TTT as well as complex sodium or tetrabutylammonium salts, some of which are highly conducting.
Intramolecular Energy Transfer in Covalently Linked Ruthenium(II)/Osmium(II) Binuclear Complex. Ru(II)bpy2Mebpy-CH2CH(OH)CH2-MebpyOs(II)bpy2
Authors: Furue Masaoki , Kinoshita Shuichi 
Published: July 2006

Abstract
A novel polypyridine ruthenium(II)/osmium(II) heterobinuclear complex (2) was synthesized. The luminescence properties of 2 were compared with those of its component complex. In 2, the efficient intramolecular energy transfer from excited Ru(II) to Os(II) complex was observed and interpreted by Foerster mechanism.
A New Synthesis of γ-Lactones with α,β-Fused Ring Systems Using α-Diethoxyphosphinyl-Δα,β-butenolides
Authors: Minami Toru , Watanabe Kazushi , Chikugo Tsuguhiko , Kitajima Yoshiyuki 
Published: July 2006

Abstract
The intramolecular Wittig–Horner reaction of α-diethoxyphosphinyl-Δα,β-butenolides with various nucleophilic reagents containing the carbonyl group produced α,β-carbocyclic fused-γ-lactones in moderate yields.
Reaction of 6-Oxa-3-silabicyclo[3.1.0]hexanes with Phosphinimines. Synthesis of 6-Vinyl-1,3-dioxa-2,4-disilacyclohexanes
Authors: Baceiredo Antoine , Juengst Clifford D , Manuel Georges , Weber William P 
Published: July 2006

Abstract
Reaction of 3,3-dimethyl-6-oxa-3-silabicyclo[3.1.0]-hexane with N-benzyltriphenylphosphinimine yields 1,3-butadiene and 2,2,4,4-tetramethyl-6-vinyl-l,3-dioxa-2,4-disilacyclohexane (3). A mechanism for the formation of 3 which involves the reaction of dimethylsilanone [(CH3)2Si=0] with 2,2-dimethyl-4-vinylsilaoxetane is proposed.
Heterogeneous Water Oxidation by a Dinuclear Manganese Complex
Authors: Ramaraj Ramasamy , Kira Akira , Kaneko Masao 
Published: July 2006

Abstract
The di-μ-oxo-tetrakis(2,2′-bipyridine)dimanganese complex was used as a heterogeneous phase catalyst for water oxidation by adsorbing into Kaolin clay. The oxygen evolved was analyzed by gas chromatography and mass spectrometry. The water oxidation reaction involving the four-electron process in a heterogeneous phase was discussed.
One-step Synthesis of Fulgides by Palladium-catalyzed Carbonylation of Substituted 2-Butyne-1,4-diols
Authors: Kiji Jitsuo , Konishi Hisatoshi , Okano Tamon , Kometani Shinji , Iwasa Akio 
Published: July 2006

Abstract
The reaction of carbon monoxide with substituted 2-butyne-1,4-diols by pd(OAc)2/I2 catalyst gives derivatives of dimethylenesuccinic anhydride, “fulgides”, in high yields.
A Solid-State Proton Conductor Sensor with an Ammonia Sensitivity at Room Temperature
Authors: Miura Norio , Worrell Wayne L 
Published: July 2006

Abstract
A new type of solid-state gas sensor using proton conductor (antimonic acid) is proposed for detecting small amounts of NH3 in air at room temperature. The sensor element has a four-probes type structure with outer two pt electrodes and inner two Ag probes. The sensor response was found to vary with the NH3 concentration (from 50 ppm to 5030 ppm) in air.
An Entry to 5-(1-Alkenyl)-3(2H)-furanones through Cycloaddition of Phosphorus-Functionalized Nitrile Oxide to Acetylene Alcohols. An Effective Synthesis of Geiparvarin
Authors: Tsuge Otohiko , Kanemasa Shuji , Suga Hiroyuki 
Published: July 2006

Abstract
Cycloaddition of α-(diethoxyphosphoryl)acetonitrile oxide to acetylene alcohols is followed by an alkylation, a reductive cleavage of the N–O bond, and an acid-catalyzed cyclization to form 5-(diethoxyphosphorylmethyl)-3(2H)-furanones in good yields. Subsequent Horner-Emmons olefination using triethylamine and lithium bromide furnishes E-isomers of 5-(1-alkenyl)-3(2H)-furanones as major products. This method has been applied to a short synthesis of Geiparvarin.
Asymmetric Synthesis of the Both Enantiomers of Tertiary Aryl Homoallyl Alcohols and Diols by Diastereoselective Addition of Allyltrimethylsilane to Chiral α-Keto Imides
Authors: Soai Kenso , Ishizaki Miyuki , Yokoyama Shuji 
Published: July 2006

Abstract
Both enantiomers of homoallyl-alcohols and -diols are obtained in high enantiomeric excesses (91–&gt;98% e.e.) by titanium tetrachloride promoted diastereoselective addition of allyltrimethylsilane to chiral α-keto imides.
Highly Efficient Asymmetric Esterification of Cyclic meso-Dicarboxylic Anhydrides Catalyzed by Diphenylboryl Triflate
Authors: Ohshima Masahiro , Mukaiyama Teruaki 
Published: July 2006

Abstract
In the presence of a catalytic amount of diphenylboryl triflate, cyclic meso-dicarboxylic anhydrides are esterified by diphenylboric ester of (R)-2-methoxy-1-phenylethanol in a highly stereoselective manner, and, after the treatment with diazomethane, the chiral diesters are obtained with high diastereomeric excess.
Directing Effects of a Silyl Group on Cationic Rearrangement Reactions
Authors: Tanino Keiji , Hatanaka Yasuo , Kuwajima Isao 
Published: July 2006

Abstract
In the reaction of 3-(trimethylsilyl)methylcyclohexyl mesylates with dimethylaluminium triflate, the silyl group has a remarkable effect to induce successive rearrangements of a hydride and an alkyl group so as to form a stable β-silyl cationic species which finally afford the corresponding olefins.
An Asymmetric Transformation of Symmetrical Epoxides to Both Enantiomers of Allylic Alcohols by Chiral Lithium Amides
Authors: Asami Masatoshi , Kirihara Hiroto 
Published: July 2006

Abstract
Both enantiomers of several optically active allylic alcohols are obtained from cyclic and acyclic symmetrical epoxides by using chiral lithium amides, i.e., lithium cyclohexyl[(S)-1-ethylpyrrolidin-2-yl]methylamide or lithium (S)-2-[(pyrrolidin-1-yl)methyl]pyrrolidide, as bases.
The Synthesis and Properties of Three Isomers of 1-Troponyl-1H-1,2-diazepine
Authors: Miyano Hiroyuki , Nitta Makoto 
Published: July 2006

Abstract
The substitution reaction of 2-halotropones or 2-tosyloxytropone with tricarbonyl(4-7-η-1H-1,2-diazepine)iron afforded three isomers of tricarbonyl(4-7-η-1-troponyl-1H-1,2-diazepine)iron in good combined yield: three complexes were decomplexed to novel three isomers of 1-troponyl-1H-1,2-diazepine.
Novel Gold Catalysts for the Oxidation of Carbon Monoxide at a Temperature far Below 0 °C
Authors: Haruta Masatake , Kobayashi Tetsuhiko , Sano Hiroshi , Yamada Nobumasa 
Published: July 2006

Abstract
A variety of gold catalysts can be used to catalyze the oxidation of carbon monoxide at temperatures as low as −70 °C and are stable in a moistened gas atmosphere. The novel catalysts, prepared by coprecipitation, are composed of ultra-fine gold particles and one of the oxides of 3d transition metals of group VIII, namely, Fe, Co, and Ni.
Boron Phosphate as a Highly Active Catalyst for 1-Decene Oligomerization
Authors: Tada Akio , Suzuka Hiroyasu , Imizu Yuzo 
Published: July 2006

Abstract
The oligomerization of 1-decene was studied over six kinds of solid acid catalysts involving boron phosphate. Among them evacuated boron phosphate exhibited the highest oligomerization activity: superior to not only SiO2–Al2O3 but also a solid superacid, SO42−/ZrO2.
New High Temperature Superconducting Oxides. (La1−xSrx)2CuO4−δ and (La1−xCax)2CuO4−δ
Authors: Kishio Kohji , Kitazawa Koichi , Kanbe Shinsaku , Yasuda Isamu , Sugii Nobuyuki , Takagi Hidenori , Uchida Shin-ichi , Fueki Kazuo , Tanaka Shoji 
Published: July 2006

Abstract
Solid solution systems of (La1−xSrx)2CuO4−δ and (La1−xCax)2CuO4−δ with x=0.05, 0.075, and 0.10 were found to exhibit the superconductivity through a.c. magnetic susceptibility and electrical resistivity measurements. The onset critical temperature for (La0.90Sr0.10)2CuO4−δ was 37 K, the highest among all the superconducting materials ever known, while that for (La0.95Ca0.05)2CuO4−δ was 18 K.
Determination of the Absolute Configuration of u-fac-[Co(ida)(mdien)]+ by 1H NMR Spectroscopy
Authors: Ama Tomoharu , Kaizaki Sumio , Kawaguchi Hiroshi , Yasui Takaji 
Published: July 2006

Abstract
Iminodiacetic acid containing asymmetric carbon with S chirality (H2ida(Cs); HOOCCH2NHC*HDCOOH) was prepared by stereospecific deuteration of (−)563CD-mer(O)cis(Nc)-[Co(ida)(edma)]. Using this H2ida(Cs), u-fac-[Co(ida(Cs))(mdien)]+ was prepared and optically resolved. On the basis of the 1H NMR spectra of the chelating ida(Cs), the absolute configuration of the (−)550CD isomer was assigned to ΔΛΔ.
Enantioselectivity in the Biotransformation of Bicyclo[3.1.1]heptanes with the Cultured Cells of Nicotiana tabacum
Authors: Suga Takayuki , Hamada Hiroki , Hirata Toshifumi 
Published: July 2006

Abstract
The biotransformation of the enantiomeric pairs of bicyclo[3.1.1]heptane derivatives with the cultured cells of Nicotiana tabacum was investigated. The hydrogenation of the C–C double bond of verbenone took place enantioselectively in preference of the (1S,5S)-enantiomer and the hydrogen attack occurred stereospecifically from the re-face at its C-2. The oxidation of the hydroxyl group of neoisopinocampheol occurred enantioselectively in preference of the (1S,2S,3R,5R)-enantiomer, whereas such an enantioselective oxidation was not the case for neoisoverbanol.
Synthesis of 2a-Substituted Dichlorocyclobuta[c]quinolin-3-one and 3-(Trichloroethenyl)-2-quinolone through the Cross Photocycloadduct of 2-Quinolone and Tetrachloroethylene
Authors: Nonoyama Shinji , Yonezawa Noriyuki , Saigo Kazuhiko , Hirano Tsuneo , Hasegawa Masaki 
Published: July 2006

Abstract
2a-Substituted dichlorocyclobuta[c]quinolin-3-one was obtained from the cross photocycloadduct of 2-quinolone and tetrachloroethylene by the reaction with bases or nucleophiles via cyclobutene formation and intermolecular SN2′ displacement along with trichloroethenyl-2-quinolone via [2+2] cycloreversion of the cyclobutene intermediate.
C-Alkylation of Phenyithio Aziridine Carboxylates
Authors: Seebach Dieter , Haner Robert 
Published: July 2006

Abstract
The N-t-butyl and N-benzyl aziridine carboxylic acid phenylthiol esters are deprotonated in the α-carbonyl position and alkylated by alkyl halides, by aldehydes, and by nitrostyrene. The diastereoselectivities in the additions to trigonal centers range from 72 to 88% (rel. topicity lk with benzaldehyde).
A 13C NMR Study of 1,4-Diphenyl- and 1,1,4,4-Tetraphenyl-1,3-butadiene Dianions
Authors: Yokoyama Yukihiro , Takahashi Kensuke 
Published: July 2006

Abstract
Lithium, sodium, and potassium salts of the title dianions were investigated by means of 13C NMR spectroscopy in THF or DME at room temperature. The structures of the butadiene carbon skeleton and especially the behaviors of the α- and β-carbons caused by the conversion of the precursors into the dianions were reported together with the counter-cation effects.
Raman Spectra of the Adducts of Reduced Species of [Fe4S4(SPh)4]2− and [Mo2Fe6S8(SPh)9]3− with Acetylene
Authors: Tanaka Koji , Nakamoto Masami , Tsunomori Michito , Tanaka Toshio 
Published: July 2006

Abstract
Reduced species of [Fe4S4(SPh)4]2− and [Mo2Fe6S8(SPh)9]3− form adducts with acetylene (C2H2 or C2D2) in dry CH3CN with liberating a terminal PhS− ligand. The ν(C≡C) Raman band undergoes 45 to 70 cm−1 low frequency shifts upon coordination of acetylene to the clusters.
Optical Resolution by Preferential Crystallization of Dl-Thiazolidine-4-carboxylic Acid
Authors: Shiraiwa Tadashi , Sado Yujin , Komure Masamitsu , Kurokawa Hidemoto 
Published: July 2006

Abstract
It was found that Dl-thiazolidine-4-carboxylic acid (Dl-THC) is a conglomerate. A successive preferential crystallization in water gave d- and l-THC’s with optical purity of 96–100%. d- and l-cysteines with 100% optical purity were obtained from the purified d- and l-THC’s, respectively.
Electrochemical Oxidation of 1-Phenylthio-1-trimethylsilylalkanes
Authors: Yoshida Jun-ichi , Isoe Sachihiko 
Published: July 2006

Abstract
Electrochemical oxidation of 1-phenylthio-1-trimethylsilylalkanes in the presence of alcohol resulted in facile cleavage of the carbon–silicon bond and formation of the corresponding acetals.
High-Tc Superconducting Oxide Solid Solutions (La1−x(Ba,Sr,Ca)x)2CuO4−δ
Authors: Kishio Kohji , Kitazawa Koichi , Sugii Nobuyuki , Kanbe Shinsaku , Fueki Kazuo , Takagi Hidenori , Tanaka Shoji 
Published: July 2006

Abstract
The system (La1−x(Ba,Sr,Ca)x)2CuO4−δ with x=0.1 has been found to be a high temperature superconducting phase in the entire compositional range of the three alkali earth cations. (La0.9Sr0.1)2CuO4−δ, displayed the highest critical temperature and the shortest distance for Cu–O bonds within the basal layer plane of the K2NiF4-type crystal structure, suggesting the two-dimensional nature of the conduction mechanism.
Regioselective Alkylation of Vinylogous N-Acyliminium Ion, Leading to 6-Alkyl-1,2,3,6-tetrahydropyridines, by Using Electrogenerated Acid (EG acid) as a Catalyst
Authors: Torii Sigeru , Inokuchi Tsutomu , Takagishi Sadahito , Akahoshi Fumihiko , Uneyama Kenji 
Published: July 2006

Abstract
Alkylation of 6-methoxy-1,2,3,6-tetrahydro- and 4-methoxy-1,2,3,4-tetrahydropyridines with organo-silicon compounds as a carbon nucleophile by using electrogenerated acid as an acid catalyst proceeds regioselectively at the C-6 position via vinylogous acyliminium ion, while sulfenylation and methoxylation occurs at the C-4 position.
Kinetic Isotope Effect and Substituent Effect Study on the Grignard Reaction of MeMgI with Benzophenone. A Rate-Determining C–C Bond Formation
Authors: Yamataka Hiroshi , Matsuyama Toyoki , Hanafusa Terukiyo 
Published: July 2006

Abstract
The carbonyl carbon-14 kinetic isotope effect and substituent effects were determined for the reaction of MeMgI with benzophenone. The observed large carbon isotope effect (14k⁄12k=1.056) together with the large steric effect on reactivity introduced by o-substituents on benzophenone indicated that the C–C bond formation is the rate-determining step of the Grignard reaction.
Characterization of a Simple Vitamin B12 Model Complex and Its Catalysis in Electrochemical Carbon-Skeleton Rearrangement
Authors: Murakami Yukito , Hisaeda Yoshio , Fan Sheng-Di 
Published: July 2006

Abstract
The electrochemical carbon-skeleton rearrangement reaction of 2,2-bis(ethoxycarbonyl)-1-bromopropane was catalyzed by the cobalt complex of 2,10-diethyl-3,9-dipropyl-1,4,8,11-tetraazaundeca-1,3,8,10-tetraene-1,10-diol, which was characterized by ESR spectroscopy and cyclic voltammetry.
Molecular Structure of the Inclusion Complex of 5-[Perfluoro(2-isopropyl-1,3-dimethyl-1-butenyl)oxy]isophthalic Acid with Ethanol
Authors: Tomoda Hideyuki , Nemoto Fujito , Ohya-Nishiguchi Hiroaki , Yamamoto Noriko , Taga Tooru 
Published: July 2006

Abstract
Title compound has been found to form a 2:2 crystalline inclusion complex with ethanol, and X-ray crystal structure of the complex was determined. In the structure of the complex, four intermolecular hydrogen bonds are involved between the two host and two guest molecules. By using the complexation, extraction of ethanol from aqueous solution is demonstrated.
Preparation of Perovskite-type Oxides with Large Surface Area by Citrate Process
Authors: Zhang Hua-Min , Teraoka Yasutake , Yamazoe Noboru 
Published: July 2006

Abstract
Well-crystallized perovskite-type oxides could be synthesized at temperatures as low as 550–650 °C by the calcination of amorphous citrate complex precursors. The large specific surface areas of the oxides obtained suggest that the citrate process is very promising for preparing perovskite-type oxide catalysts for practical use.
Allylation of Imines with in situ Generated Allyl Lead Reagents in a PbBr2/Al/BF3·OEt2/Et2O System
Authors: Tanaka Hideo , Yamashita Shiro , Ikemoto Youichi , Torii Sigeru 
Published: July 2006

Abstract
Reductive addition of allyl bromide to imines has been performed with a combination of a catalytic amount of PbBr2 (0.03–0.1 equiv.) and Al (1 equiv.) in Et2O containing BF3·OEt2 (1.1 equiv).
Useful Synthesis of α-Aminonitriles by Means of Alumina and Ultrasound
Authors: Hanafusa Terukiyo , Ichihara Junko , Ashida Tetsuya 
Published: July 2006

Abstract
Combined use of alumina and ultrasound facilitates the synthesis of α-aminonitriles under solid–liquid two phase conditions from carbonyl compounds, salts of amines and potassium cyanide in organic solvents.
A Novel Aspect in Chlorination of d-Glucal Derivatives. Important Roles of the 4,6-O-Benzylidene Group and Substituent at C-3 in the Selective Formation of β-d-Manno and β-d-Arabino Isomers
Authors: Sakakibara Tohru , Yatabe Takumi , Yoshino Kohji , Ishido Yoshiharu 
Published: July 2006

Abstract
In contrast with the precedent reports described in peracetyl-and perbenzyl-d-glucal, chlorination of 3-O-acetyl- and 3-deoxy-4,6-O-benzylidene-d-glucal in carbon tetrachloride predominantly occurred from the β-side to give the β-d-manno and β-d-arabino adducts, respectively.
Cyclization of Type II Diradicals from 3-Alkoxy-1,2-naphthoquinones. Photochemical Transformation of an Alkoxyl Group into a Methylenedioxy Group
Authors: Takuwa Akio , Soga Osamu , Itoh Mitsumi , Maruyama Kazuhiro 
Published: July 2006

Abstract
Photo-induced intramolecular hydrogen abstraction of 3-alkoxy-1,2-naphthoquinones afforded methylenedioxy compounds. The efficiency of the reactions was strongly affected by introducing a substituent at the position 4 of the quinones.
Mechanism of Asymmetric Polymerization of Triphenylmethyl Methacrylate, Separation and Optical Resolution of Oligomers
Authors: Okamoto Yoshio , Yashima Eiji , Nakano Tamaki , Hatada Koichi 
Published: July 2006

Abstract
Asymmetric oligomerization of triphenylmethyl methacrylate (TrMA) was carried out with (−)-sparteine-fluorenyllithium complex in toluene at −78 °C and the oligomers of methyl methacrylate (DP=2 and 3) derived therefrom were separated into diastereomers and optical isomers on silica gel and chiral HPLC columns, respectively. On the basis of the obtained data, the mechanism of asymmetric polymerization of TrMA was discussed.
The pH-Sensitive Conversion of Molecular Aggregates of Rhamnolipid Biosurfactant
Authors: Ishigami Yutaka , Gama Yasuo , Nagahora Hitoshi , Yamaguchi Muneo , Nakahara Hisae , Kamata Toshio 
Published: July 2006

Abstract
Rhamnolipid B and its precursor A, both microbial and membranous constituent, reversibly changed morphologies of their molecular aggregates from vesicles under acidic conditions, to lamella, lipid particles, and finally to micelles under weakly acidic conditions within a narrow pH range of about 5–7.
Oxidative Coupling of Methane over BaO Mixed with CaO and MgO
Authors: Yamagata Nobutsugu , Tanaka Katsutoshi , Sasaki Shoichi , Okazaki Susumu 
Published: July 2006

Abstract
Various metal oxides mixed with BaO were studied as a catalyst for coupling of methane. For example, a BaO–CaO catalyst shows a high activity (20.9 mmol h−1g−1) for the C2 formation (C2H6+C2H4) with a high C2 selectivity(61.1%) under the following conditions; 1073 K, P(CH4) = 40 kPa, a ratio of CH4 to O2 = 5.0, and W/F = 3.39 g h mol−1.
Reactions of (2S)-1-Arenesulfonyl-2-alkanol Dianions with Aldehydes, Application to the Synthesis of Enantiomerically Pure (3S)-1-Alken-3-ols and (2E,4S)-4-Hydroxy-2-alkenenitriles
Authors: Tanikaga Rikuhei , Hosoya Ken , Kaji Aritsune 
Published: July 2006

Abstract
Enantiomerically pure (2S)-1-arenesulfonyl-2-alkanols (1) were prepared by yeast reduction of 1-arenesulfonyl-3-chloro-2-propanones, followed by epoxydation and alkylation. Reaction of dianions of 1 with aldehydes occurred at the Pro (R) position of C(1) to give 1,3-diols, which were converted to (3S)-1-alken-3-ols or (2S,4S)-4-hydroxy-2-alkenenitriles in 100% e.e.
Substituent Effects on the Populations of Rotational Isomers in 9-Benzyl-8,13-dichloro-1-methyltriptycenes. Evidence for the Presence of CH3···π Interactions
Authors: Nakai Yasufumi , Yamamoto Gaku , Oki Michinori 
Published: July 2006

Abstract
Examination of population ratios, ±sc/ap, in substituted 9-benzyl-8,13-dichloro-1-methyltriptycene derivatives by 1H NMR spectroscopy has shown that the ratio becomes larger as the substituent in the benzyl group is more electron-donating and as that in the benzeno bridge which bears the 1-methyl group is more electron-withdrawing. The results are interpreted as indicating the presence of CH3···π interactions.
An Interpretation of the Puzzling Dichotomy of the Reaction Modes Observed during the Side-chain Nitration of Alkylaromatics with HNO3/CH2Cl2 and HNO3/(CH3CO)2O
Authors: Suzuki Hitomi , Koide Hideki , Taki Yukiko , Ohbayashi Eiichi , Ogawa Takuji 
Published: July 2006

Abstract
Nitration of substituted pentamethylbenzenes has been carried out under various conditions using the title nitrating systems in order to elucidate the peculiar dependence of the modes of side-chain substitution on the reagent employed; nitrooxylation with HNO3/CH2Cl2 and nitration with HNO3/(CH3CO)2O. Based on the evidence obtained from product variations with substituents, electrochemical nitrodecarboxylation of arylacetates, and ESR examination of the initial stage of the side-chain reactions, a proposal is made that the side-chain substitution of polysubstituted arenes occurs via a heterolytic path with HNO3/CH2Cl2 and via a homolytic path with HNO3/(CH3CO)2O.
Promotion Effect of Hydrogen on Vapor Phase Carbonylation of Methanol over Nickel on Active Carbon Catalyst
Authors: Fujimoto Kaoru , Mazaki Hitoshi , Omata Kohji , Tominaga Hiro-o 
Published: July 2006

Abstract
In the vapor phase carbonylation of methanol by carbon monoxide on a nickel on active carbon catalyst, co-existence of hydrogen greatly enhanced the rate of acetic acid production but with a slight increase in methane formation.
Asymmetric Induction in 1,3-Dipolar Cycloaddition of Diazofluorene with Menthyl or 8-Phenylmenthyl Acrylate and Fumarate Derivatives
Authors: Okada Keiji , Samizo Fumio , Oda Masaji 
Published: July 2006

Abstract
Optical yields in the 1,3-dipolar cycloaddition of diazofluorene with chiral acrylate or fumarate derivatives were found to be considerably improved by use of Corey’s 8-phenylmenthyl group as a chiral O-alkyl group in these esters. The absolute stereochemistry of resulting cyclopropanes is different from the one expected from the “diazo-exchange” mechanism proposed by Walborsky et al.
Crystal Structure of a 1 : 1 Complex of 1,3-Bis(8-quinolyloxy)propane and Lithium Perchlorate
Authors: Ueno Katsuhiko , Hiratani Kazuhisa , Taguchi Kazuhiro , Okada Tatsuhiro , Sugihara Hideki 
Published: July 2006

Abstract
1,3-Bis(8-quinolyloxy)prppane, which exhibits highly lithium ion-selective transport through liquid membrane, forms a 1 : 1 complex with lithium perchlorate. The X-ray analysis of this complex revealed that lithium ion is pentacoordinated in a nearly square pyramidal geometry.
Synthesis of Enkephalin Analog with Leucinthiol at C-Terminus as Probe for Thiol Group in Opiate Receptors
Authors: Kondo Michio , Uchida Hiroaki , Kodama Hiroaki , Kitajima Hiroshi , Shimohigashi Yasuyuki 
Published: July 2006

Abstract
Enkephalin analog with thiol group at C-terminus, [D-Ala2, Leu(CH2SH)5]enkephalin, was synthesized as possible probe for the essential thiol group in opiate receptors. In order to protect the free SH group of leucinthiol, oxidized Boc-l-leucinthiol dimer was prepared from l-leucinol (2-amino-4-methyl-1-pentanol) to elongate the enkephalin sequence. SH-Containing monomeric enkephalin analog was obtained from dimer by treatment with zinc in 50% AcOH, and it exhibited a high affinity for mu opiate receptors.