bluuebunny/crossref_metadata_2025 huggingface dataset:
A New Synthesis of cis-Diol from Olefin Using Iodine-Copper(II) Acetate
Authors: Horiuchi C Akira , Satoh J Yasuo
Published: July 2006

The reaction mixtures of 5α-cholest-2-ene with iodine and copper(II) acetate were converted with potassium hydroxide in methanol-water to give the more hindered 2β, 3β-diol in high yield. Cyclohexene and cycloheptene similarly gave the corresponding cis-diols in good yield. This new synthetic method afforded several advantage over the Prevost reaction.
Inductive Control of Through-Bond Interactions
Authors: Inagaki Satoshi , Okajima Takehiko , Tanaka Kenji
Published: July 2006

Inductive control of through-bond interactions was substantiated by the reversed site selectivity of the deprotonation reactions of 1,3-dimethyltriptycene and its 9,10-dichloro derivative.
Synthesis of Carbocyclic Lignan Variants Related to Podophyllotoxin
Authors: Saito Kitoshi , Nishimura Yoshio , Kondo Shinichi , Takeuchi Tomio
Published: July 2006

Carbocyclic lignan variants related to podophyllotoxin were synthesized by a stereoselective BF3-catalyzed coupling of podophyllotoxin derivative with chiral aminocyclitols.
Perfluoroalkyl-thwarted Rearrangement of Quinol Esters. Formation of Catechol Derivatives via 1,3-Migration of Acyloxyl Group
Authors: Suzuki Hitomi , Shiraishi Yasukazu , Shimokawa Kazuhiro , Uno Hidemitsu
Published: July 2006

Treatment of 4-perfluoroalkyl-4-quinols with acetic anhydride-sulfuric acid was found to lead to 1,2- and 1,3-migration of acetoxyl group in initially formed quinol acetates followed by aromatization to give a mixture of 4-perfluoroalkylresorcinol diacetate and 4-perfluoroalkylcatechol diacetate.
Molecular Interactions through Carbonyl Groups. Dimerizations of Dibenzylideneacetone and Dicinnamylideneacetone at Low Temperature
Authors: Hoshi Toshihiko , Okubo Jun , Kawase Hiromitsu , Inoue Hiroyasu , Sakurai Tadamitsu , Kobayashi Michio
Published: July 2006

From the UV spectral data together with the MO calculated results, it has been suggested that dibenzylideneacetone or dicinnamylideneacetone forms a noncentrosymmetric dimer in a nonpolar matrix at low temperature. The dimerizations occur through interactions between carbonyl groups.
MoO2(acac)2 Complex as a Reagent for Oxidative Cleavage of vic-Diols
Authors: Kaneda Kiyotomi , Morimoto Kenichi , Imanaka Toshinobu
Published: July 2006

MoO2(acac)2-t-BuOOH system has high activity for oxidative cleavage of tertiary and secondary vic-diols. MoO2(acac)2 cleaves the diols to give cafbonyl compounds in the absence of t-BuOOH.
Vapor-phase Hydration of Dicyclopentadiene Catalyzed by Niobic Acid
Authors: Okazaki Susumu , Harada Hirofumi
Published: July 2006

Vapor-phase hydration of dicyclopentadiene in a flow system was promoted by niobic acid. Maximum conversion to the hydrated product was obtained at around the boiling point of dicyclopentadiene, 170 °C. Niobic acid rapidly decreased its catalytic activity when it was heat-treated at temperatures higher than 300 °C.
Synthesis and Electrochemical Properties of 2,3,6,7-Tetrahydro-1,4,5,8-tetrathiaanthracene (HTA) and Its Derivatives
Authors: Nabeshima Tatsuya , Iwata Satoru , Furukawa Naomichi , Morihashi Kenji , Kikuchi Osamu
Published: July 2006

2,3,6,7-Tetrahydro-1,4,5,8-tetrathiaanthracene (HTA), 9-amino-HTA, 9-acetyl-HTA, 9,10-dimethyl-HTA, and 1,4,5,8-tetrathiaanthracene have been synthesized. Electrochemical properties and preparation of the charge transfer complexes of HTAs with several acceptors are also reported.
Study of Charge Compensation Mechanism in IrOx Electrochromic Reactions by In Situ Electrogravimetry
Authors: Masuda Hideki , Yoshino Takako , Arai Kenji , Baba Nobuyoshi
Published: July 2006

The mechanism of the charge compensation in the coloring/bleaching reactions in IrOx films was studied by in situ electrogravimetry. The weight change measured with a liquid phase quartz crystal microbalance indicated that the cations were ejected from the IrOx film to a bulk electrolyte during anodic coloration.
Reaction of 4,4-Diethyl-1,2-dithiolane with Grignard Reagents
Authors: Tazaki Masato , Nagahama Shizuo , Takagi Makoto
Published: July 2006

Clean ring cleavage of 1,2-dithiolane by carbanion was first recognized for 4,4-diethyl-1 ,2-dithiolane (3) in the reaction with Grignard reagents, the reactivity being attributed to the low polymerizing tendency of 3, similar to that of the enzyme-bound lipoic acid.
Regio- and Stereoselective Trapping of Pentadienyl Anion by a Tin Electrophile
Authors: Naruta Yoshinori , Nishigaichi Yutaka , Maruyama Kazuhiro
Published: July 2006

Electrophilic trapping of the pentadienyl anions bearing a methoxymethyl group with Me3SnBr gives Z-pentadienylstannanes in high regioselectivity regardless of the structure of the anion.
Rate-Determining Electron Transfer from Allylic Grignard Reagents to Benzophenone
Authors: Matsuyama Toyoki , Yamataka Hiroshi , Hanafusa Terukiyo
Published: July 2006

The reactions of allyl magnesium bromide and crotyl magnesium bromide with benzophenone were determined to proceed via a rate-determining electron transfer mechanism by means of the isotope effect and substituent effect technique.
Efficient Optical Resolution of 2,2′-Dihydroxy-1,1′-binaphthyl and 10,10′-Dihydroxy-9,9′-biphenanthryl by Complex Formation with Novel Chiral Host Compounds Derived from Tartaric Acid
Authors: Toda Fumio , Tanaka Koichi , Nassimbeni Luigi , Niven Margaret
Published: July 2006

2,2′-Dihydroxy-1,1′-binaphthyl and 10,10′-dihydroxy-9,9′-biphenanthryl were resolved efficiently by complex formation with novel chiral host compounds derived from tartaric acid, (R,R)-(+)-2,3-dimethoxy-N,N,N′,N′-tetramethylsuccinamide and (R,R)-(+)-N,N,N′,N′ -tetramethyl-2,2-dimethyl-1,3-dioxolane-trans-4,5-dicarboxamide, respectively. X-Ray crystal structure of these complexes was studied.
Application of the Benzyloxycarbonyloxymethyl Moiety to a Protective Group of 5-Fluorouracil. Selective Alkylation of Amide Nitrogen of the Uracil Ring
Authors: Nagase Toshio , Seike Kanzo , Shiraishi Kazuto , Yamada Yutaka , Ozaki Shoichiro
Published: July 2006

Selective alkylation of 5-fluorouracil using the benzyloxycarbonyloxymethyl moiety as a protective group of amide nitrogen of the uracil ring is described. Protection, alkylation and deprotection were carried out in high yields.
Electrocatalytic Oxidation of Nerol with Nitroxyl Radical Covalently Immobilized to Poly(acrylic acid) Coated on Carbon Electrodes
Authors: Osa Tetsuo , Akiba Uichi , Segawa Isao , Bobbitt James M
Published: July 2006

Glassy carbon electrode coating poly(acrylic acid) immobilized covalently with 2,2,6,6-tetramethylpiperydinyl-1-oxy was characterized electrochemically and a similar modified carbon felt electrode was utilized successfully to electrocatalytic oxidation of nerol.
A Short Synthesis of 15-Dehydroprostaglandin B1 Methyl Ester
Authors: Naora Hirokazu , Ohnuki Takashi , Nakamura Asao
Published: July 2006

A new synthetic method for 15-dehydroprostaglandin B1 methyl ester (15-dehydroPGB1 methyl ester) in four steps from commercially available starting materials is described.
Highly Stereoselective Total Synthesis of Plaunotol
Authors: Sato Kikumasa , Miyamoto Osamu , Inoue Seiichi , Iwase Norimichi , Honda Kiyoshi
Published: July 2006

Highly stereoselective total synthesis of plaunotol has been achieved by the application of the (Z)-stereoselective direct Wittig olefination to α-alkoxy ketones having geranyl-acetone skeleton.
Deoxygenat ion of 1,3-Diene 1,4-Endoperoxides by Tin(II) Chloride
Authors: Kohmoto Shigeo , Kasai Satoru , Yamamoto Makoto , Yamada Kazutoshi
Published: July 2006

The reaction of bicyclic 1,3-diene 1,4-endoperoxides with SnCl2 re-generated the corresponding dienes in 15–70% yield. The efficiency of the deoxygenation depended on the structure of peroxides. The results were compared with those of Fe(II) as well as Pd(O) assisted reactions.
The Crystal Structure, Absolute Configuration and Circular Dichroism of (−)630CD- and (+)630CD-cis-Bis[2-(2-benzoxazolyl)phenol-N]dichloroplatinum(II)·ethanol
Authors: Furuhashi Akiko , Endo Kunihiko , Ouchi Akira , Saito Yoshihiko
Published: July 2006

The crystals of the title complex resolve spontaneously. The enantiomeric crystals were separated under a microscope. They are orthorhombic, space group P212121. This is a square planar complex with 2Cl in cis-positions. The ligand acts as a unidentate with its N atom. The absolute configuration was correlated with the CD spectrum in microcrystalline state.
Synthesis of Octaalkyl- and Octaarylporphyrins from Nitroalkenes
Authors: Ono Noboru , Maruyama Kazuhiro
Published: July 2006

Symmetrically substituted octaalkyl- and octaarylporphyrins are readily prepared by the reduction of 2-ethoxycarbonyl-3,4-diarkyl (or diaryl)pyrroles with LiAlH4 followed by treatment with acetic acid and oxidizing agents.
Preparation of Bi–Sr–Ca–Cu–O Films by Chemical Vapor Deposition with Metal Chelate and Alkoxide
Authors: Yamane Hisanori , Kurosawa Hideyuki , Hirai Toshio
Published: July 2006

Bi–Sr–Ca–Cu–O films were chemically deposited on yttria stabilized zirconia substrates at 1083 K and 130 Pa using a bismuth alkoxide and β-diketonate chelates with Sr, Ca, and Cu as source materials.
Trioxazolo[23]metacyclophane. Synthesis and Properties of a Novel [23]Metacyclophane Annelated with Three Oxazole Rings
Authors: Sasaki Hideaki , Nakagawa Hidetoshi , Khuhara Masahiro , Kitagawa Tokujiro
Published: July 2006

The title compound (6) was synthesized by the base-induced condensation of 3-(isocyanotosylmethyl)benzaldehyde as a new bifunctional reactant for the synthesis of [2n]metacyclophanes. The treatments of 6 with silver triflate in several molar ratios in THF at room temperature afforded only 2:1 silver triflate complex on the basis of the 1H NMR and the analytical data.
Synthesis of 2,4-Dideoxy-4-[(S)-methyl- and (R)-cyclohexylphosphinyl]-α,β-d-erythro-pentofuranoses. The First P-in-Ring Sugar Analogues of 2-Deoxy-d-ribofuranose Type
Authors: Yamamoto Hiroshi , Noguchi Ayashi , Torii Kenji , Ohno Keiji , Hanaya Tadashi , Kawamoto Heizan , Inokawa Saburo
Published: July 2006

Starting with 3-deoxy-1,2-O-isopropylidene-α-d-ribo-hexofuranose, methyl 2,4-dideoxy-4-[(methoxy)methyl- and cyclohexylphosphinyl]-d-glycero-pentopyranosides were prepared in a 9 step sequence (20–25% overall yield). These were converted into the title compounds, which were characterized as the 1,3,5-tri-O-acetates.
Novel Intermolecular Heterocycle Exchange Reaction of Cyclohepta[b][1,4]benzoxazines and Their S-Analogs with 1,2-Bifunctional Reagents
Authors: Nozoe Tetsuo , Shindo Kimio , Ishikawa Sumio
Published: July 2006

The benzoxazine and the benzothiazine moieties of cyclohepta[b][1,4]benzoxazines and their S-analogs were easily exchanged with o-aminobenzenethiol, o-phenylenediamine and other related 1,2-bifunctional reagents in ethanol. The exchange of the two fused heterocycles of a tropylium compound is also described.
Practical Reversibility of HCN Synthesis by Electric Discharge in CH4/N2 Mixture
Authors: Tanaka Kazunori , Morio Toshiki , Takagi Yuzuru
Published: July 2006

Electric discharge in CH4/N2 mixture yielded HCN and H2 as main products, accompanied by transient formation of C2- and C3- hydrocarbons. The practical reversibility of this HCN synthesis has been demonstrated by obtaining CH4 and N2 by electric discharge in HCN/H2 mixture.
Reductive Phosphorylation of 1,2-Dithiolanes with Dialkyl Phosphites
Authors: Tazaki Masato , Nagahama Shizuo , Takagi Makoto
Published: July 2006

Lipoamide was reductively phosphorylated by dialkyl phosphites in the presence of triethylamine with high regioselectivity. Acid anhydride did not interfere with the phosphorylation. Thus, 6-S-acyldihydrolipoamides bearing 8-S-phosphoryl group were synthesized in one-pot reaction in good yields.
A New Feeding-Deterrent Diterpenoid from the Brown Alga Dilophus okamurai Dawson
Authors: Kurata Kazuya , Shiraishi Kazunari , Takato Tohru , Taniguchi Kazuya , Suzuki Minoru
Published: July 2006

A new unusual metabolite with feeding-deterrent activity, closely related to spatane-type diterpenoids, has been isolated from the title alga, and its structure was determined by the spectroscopic method.
Vapor-Phase Reduction of Aldehydes and Ketones with 2-Propanol over Hydrous Zirconium Oxide
Authors: Shibagaki Makoto , Takahashi Kyoko , Kuno Hideyuki , Kawakami Hiroshi , Matsushita Hajime
Published: July 2006

Vapor-phase reduction of aldehydes and ketones with 2-propanol was carried out over hydrous zirconium oxide. The reduction proceeded efficiently to give corresponding alcohols. The oxide worked continuously for 10 h without being inactivated.
Photolysis of β-(o-Methylthiophenyl)vinyl Bromides. A Versatile Synthesis of Benzo[b]thiophens
Authors: Kitamura Tsugio , Kobayashi Shinjiro , Taniguchi Hiroshi
Published: July 2006

Exclusive cyclization in photolysis of β-(o-methylthiophenyl)vinyl bromides to give benzo[b]thiophens is described.
Kinetic Pressure Effect on Photoreduction of 2,4,6-Trinitrobenzoic Acid as Studied by Time-Resolved ESR
Authors: Sueishi Yoshimi , Kuwata Keiji
Published: July 2006

Kinetic time-resolved ESR study was carried out on Photoreduction of 2,4,6-trinitrobenzoic acid (TNA). The CIDEP signal decayed in a biphasic manner, and the activation volumes for the fast and the slow decays were 26 and 11 cm3 mol−1, respectively.
Litophynin C, a New Insect Growth Inhibitory Diterpenoid from a Soft Coral Litophyton sp.
Authors: Ochi Masamitsu , Futatsugi Kensuke , Kume Yasuhiro , Kotsuki Hiyoshizo , Asao Kazuhiko , Shibata Kozo
Published: July 2006

A new diterpenoid, litophynin C, which exhibits insect growth inhibitory activity against the silkworm, Bombyx mori L., has been isolated from a soft coral Litophyton sp., and its structure including the absolute configuration established on the basis of spectral and chemical evidence.
Selective Hydrogenation of Crotonaldehyde to Crotyl Alcohol on Ag-MnO2/Al2O3·5AlPO4 Catalysts
Authors: Nagase Yoshinori , Muramatu Hideaki , Sato Takuzi
Published: July 2006

The activity and selectivity of Ag-MnO2/Al2O3·5AlPO4 catalysts for the hydrogenation of crotonaldehyde to crotyl alcohol have been investigated in liquid phase. When MnO2 was added to the catalyst, the activity and selectivity for the reaction were remarkably improved to give the conversion of 100 mol% and the selectivity of 69.5%.
Oxidative Cleavage of 4,6-O-Benzylidene Ring with t-Butyl Hydroperoxide and Copper(II) Chloride. Preparation of Methyl 4-O- and 6-O-Benzoylhexopyranoside Derivatives
Authors: Sato Ken-ichi , Igarashi Tetsutaro , Yanagisawa Yukio , Kawauchi Nobuya , Hashimoto Hironobu , Yoshimura Juji
Published: July 2006

Copper(II) chloride and palladium(II) acetate were found to be highly effective catalysts for oxidative cleavage of O-benzylidene ring with t-butyl hydroperoxide. Using the former catalyst 4,6-O-benzylidenehexopyranoside derivatives were converted into the corresponding 4- and 6-benzoates in high yields. This reaction was also applicable for conversion of benzyl group into benzoyl one.
Preparation of Hexafluoroacetone by Vapor Phase Oxidation Of Hexafluoropropene
Authors: Kurosaki Akito , Okazaki Susumu
Published: July 2006

Hexafluoroacetone was readily formed by circulating a gaseous mixture of hexafluoropropene and oxygen over platinum group metals supported on carbon. Reaction temperatures, ranging from 130 to 170 °C, gave both high selectivity and conversion for the hexafluoroacetone formation using a Pd/C catalyst.
Effect of Univalent Cations on the Rotational Motion of Perchlorate Ion in Aqueous Solution
Authors: Masuda Yuichi , Yamatera Hideo
Published: July 2006

The rotational correlation times of ClO4− in D2O solutions of lithium, sodium, and ammonium perchlorates (0.1–2 mol/kg) were determined by measuring the 17O spin-lattice relaxation rates arid calculating the electric field gradient at the 17O nucleus by an ab initio MO method. The correlation time increased with increasing concentration of the perchlorates. The effect of cations increased in the order: Li+ < NH4+ < Na+.
Preparation and Crystal Structure of a New Hetero-metal Mixed Valence CuII–PtIVComplex with One Dimensional Chain Structure [Cu(en)2][PtCl2(en)2](ClO4)4
Authors: Oshio Hiroki , Toriumi Koshiro , Bando Shunji
Published: July 2006

Bis(ethylenediamine)copper(II) trans-dichlorobis(ethylenediamine)platinum(IV) perchlorate was prepared and the halogen-bridged linear chain structure has been determined by X-ray diffractometry. The copper and platinum complexes are stacked alternately in the chain. Temperature dependence of the magnetic susceptibility and EPR data indicate no strong magnetic interaction between copper atoms.
Novel Clathrate Compound of Cadmium Cyanide Host with an Adamantane-like Cavity. Cadmium Cyanide-Carbon Tetrachloride(1/1)
Authors: Kitazawa Takafumi , Nishikiori Shin-ichi , Kuroda Reiko , Iwamoto Toschitake
Published: July 2006

Carbon tetrachloride molecule is accommodated in the cavity formed in the three-dimensional framework of cadmium cyanide to give the title clathrate compound. The cavity has a shape of adamantane-like cage edged with –Cd–CN–Cd– linkage where the Cd atom takes a tetrahedral configuration.
Wavelength- and Temperature-dependent Photolysis of a Diphosphene. Generation of 2,4,6-Tri-t-butylphenylphosphinidene and E/Z Isomerization
Authors: Yoshifuji Masaaki , Sato Takahiro , Inamoto Naoki
Published: July 2006

A phospha-indane derivative was obtained via intramolecular C–H insertion of the phosphinidene generated as an intermediate by the photolysis of E-1,2-bis(2,4,6-tri-t-butylphenyl)diphosphene whereas the photolysis through a Pyrex filter at −40 °C gave an equilibrium mixture of E and Z.
Asymmetric Syntheses of (−)-Malyngolide and (−)-Frontalin by Utilizing Bakers’ Yeast Reduction of S-Ethyl 2-Cyclopentanonecarboxylthioate
Authors: Sato Toshio , Maeno Hajime , Noro Tomohiro , Fujisawa Tamotsu
Published: July 2006

Bakers’ yeast reduction of S-ethyl 2-cyclopentanonecarboxylthioate affords optically pure S-ethyl (1R,2S)-2-hydroxycyclopentanecarboxylthioate which is stereoselectively converted into (−)-malyngolide and (−)-frontalin.
Adsorption Characteristics of Lithium in Sea Water with Coprecipitated Alumina-Magnesia Gel
Authors: Kaneko Shoji , Takahashi Wataru
Published: July 2006

Alumina-magnesia mixed-oxide gel exhibited adsorptive ability for lithium in sea water attributed to weak acidic sites and micro-pores of diameter 20–30 Å. The adsorption of lithium proceeded predominantly by the mechanism of ion-exchange, on which the facility was shown in the order of Na+> H+> NH4+. The elution of lithium adsorbed on the gel was complete with dilute hydrochloric acid.
Aminated Polystyrene-Bound Rhodium Carbonyl Clusters as a Catalyst for Deoxygenation of Various N–O Bonds
Authors: Kaneda Kiyotomi , Takemoto Tetsuya , Imanaka Toshinobu
Published: July 2006

Aminated polystyrene-bound rhodium carbonyl cluster complexes are prepared by treatment of Rh6(CO)16 with various aminated polystyrenes. The polymeric rhodium complexes show a catalytic activity for deoxygenation of nitro compounds, oximes, hydroxylamines, and N-oxides under the conditions using CO and H2O. The recovered rhodium complexes maintain the deoxygenation ability with a small loss of the selectivity.
Synthesis and Characterization of the Di(μ-oxo)Dimanganese(III,IV) Complex with Carboxylato Groups as a Terminal Ligand
Authors: Suzuki Masatatsu , Senda Hitoshi , Kobayashi Yumiko , Oshio Hiroki , Uehara Akira
Published: July 2006

A dinuclear manganese(III,IV) mixed valence complex [Mn2(N3O-py)2(O)2]ClO4·2.5H2O was prepared (N3O-py:N,N-bis(2-pyridylmethyl)glycinate) and its crystal structure was determined by X-ray crystal structure analysis. The analysis showed that two manganese ions are linked by two oxo bridges with the separation of 2.656(2) Å and the structural difference between manganese(III) and manganese(IV) moieties is relatively small compared to those of complexes so far reported.
A Photolysis of N-[3-(2-Hydroxy-3-methoxyphenyl)propyl]-6-bromobenzamides. One-step Synthesis of 5,6-Dihydro-4H,8H-pyrido[3,2,1-de]phenanthridin-8-ones
Authors: Hoshino Osamu , Ogasawara Hiromichi , Hirokawa Akihisa , Umezawa Bunsuke
Published: July 2006

A photolysis of phenolic bromoarylalkanamides in methanol containing sodium hydroxide gave two kinds of 5,6-dihydro-4H,8H-pyrido[3,2,1-de]phenanthridin-8-ones accompanied with debrominated amides.
Concentration Dependence of the Rotational Motion of Tetraphenylborate and Tetraphenylarsonium Ions in Aqueous Solution. Effect of Their Self-Association
Authors: Masuda Yuichi , Yokoyama Haruhiko
Published: July 2006

The 13C spin-lattice relaxation times and NOE for the para carbons of Ph4As+ and BPh4− were measured in D2O and CD3OD. The osmotic coefficients were also determined in the aqueous solutions of Ph4AsCl+ and NaBPh4. A remarkable increase in the rotational correlation time of the Ph4As+ ion with increasing concentration was attributed to the formation of aggregates containing two or more Ph4As+ ions.
Molecular Recogniton of Polysaccharide-Coated Liposomes. Importance of Sialic Acid Moiety on Liposomal Surface
Authors: Sunamoto Junzo , Sakai Kouichi , Sato Toshinori , Kondo Hiroki
Published: July 2006

Conjugation of sialic acid to cholesterol-substituted polysaccharides has been carried out. Liposomes, which are coated with sialic acid-modified polysaccharide, were significantly aggregated by sialic acid-specific lectin, and inhibition of phagocytosis of the liposomes by phagocytic cells was observed. Appropriate treatment of the liposomes with a neuraminidase made the efficient removal of sialic acid from the polysaccharide on the liposomal surface.
Chemical Decomposition of Chlorofluorocarbons by Reductive Dehalogenation Using Sodium Naphthalenide
Authors: Oku Akira , Kimura Kenji , Sato Masaya
Published: July 2006

All halogen atoms in 1,1,2-trichloro-1,2,2-trifluoroethane (F-113) were removed in the form of chloride and fluoride ions by the treatment with sodium naphthalenide (1.5 equiv. per halogen atom) in THF at 150 °C for 50 min in the presence of 10 vol% tetraethyleneglycol dimethylether. Similar treatment was also efficacious in the dehalogenation of F-22 and F-12.
Synthesis of Substituted 2-Decalones from 1-Acetylcyclohexenes and α-Trimethylsilyl α,β-Unsaturated Carbonyl Compounds by Two-Fold Michael Reactions. Synthesis of (±)-Khusitone
Authors: Hagiwara Hisahiro , Akama Tsutomu , Okano Akihiro , Uda Hisashi
Published: July 2006

The kinetic enolates of 1-acetyl cyclohexenes undergo two-fold Michael reaction with α,-trimethylsilyl α,β-unsaturated carbonyl compounds to produce 5-substituted 2-decalones. The application of this reaction has enabled a synthesis of (±)-khusitone.
Decomposition of Nitric Oxide over Y–Ba–Cu–O Mixed Oxide Catalysts
Authors: Shimada Hiromichi , Miyama Susumu , Kuroda Haruo
Published: July 2006

Y–Ba–Cu–O mixed oxide catalysts supported on MgO were found to have higher catalytic activity for NO decomposition than a commercial Pt supported catalyst at 800 °C. XPS analysis suggests that the decomposition of NO is facilitated by the redox cycle of Cu.
Biscarbamoyl Diselenide as a Carbamoylating Reagent. A Convenient Method for the Preparation of ω-Haloalkyl Carbamates from Cyclic Ethers
Authors: Fujiwara Shin-Ichi , Ogawa Akiya , Kambe Nobuaki , Ryu Ilhyong , Sonoda Noboru
Published: July 2006

Treatment of 4- to 7-membered cyclic ethers with bis(N,N-diethylcarbamoyl) diselenide and mercury(II) halides resulted in halo-carbamoylative ring opening to give corresponding ω-haloalkyl carbamates in moderate to high yields.
Photosubstitution of Dicyanobenzenes by Group 14 Organometallic Compounds via Photoinduced Electron-Transfer. Additive and Medium Effects on Photoinduced Electron Transfer Reaction
Authors: Mizuno Kazuhiko , Nakanishi Kazuhisa , Otsuji Yoshio
Published: July 2006

The phenanthrene-sensitized photoreaction of 1,2- and 1,4-dicyanobenzenes with group 14 organometallic compounds containing allylic and benzylic groups in CH3CN afforded the corresponding 2- and 4-allylated and -benzylated benzonitriles in high yields. These photoreactions were accelerated by the addition of Mg(CLO4)2 and benzene derivatives.
α-Alkylation of Lithiated (2E,4E)-2,4-Alkadienal Dimethylhydrazones. Preparation of α-Alkylated (3E,5Z)-3,5-Alkadienal Dimethylhydrazones
Authors: Matsumiya Kaoru , Nakano Ken-ichi , Suemitsu Rikisaku , Yamashita Masakazu
Published: July 2006

Alkylation of lithium salts of (2E,4E)-2,4-alkadienal dimethylhydrazones with alkyl halides afforded α-alkylated (3E,5Z)-3,5-alkadienal dimethylhydrazones with the rearrangement of two double bonds in good yields.
Preparation of Copper-Indium-Sulfide Thin Films by Solution Pyrolysis of Organometallic Sources
Authors: Nomura Ryoki , Kanaya Kouichi , Matsuda Haruo
Published: July 2006

Thin films of copper-indium-sulfide (CuInS2) were prepared by solution pyrolysis technique using a solution of diisobutylindium propylthiolate-copper bis(dibutyldithiocarbamate) in p-xylene at 250–350 °C. CuInS2 films obtained were characterized by SEM, XRD, and X-ray microanalysis and optical gap of about 1.43 eV was measured.
Design and Synthesis of Cathepsin B Inhibitors by an Affinity Labeling Approach
Authors: Matsueda Rei , Umeyama Hideaki , Kominami Eiki , Katunuma Nobuhiko
Published: July 2006

The affinity labeling approach by the use of S-(3-nitro-2-pyridinesulfenyl) group was demonstrated to be effective and versatile to the design and synthesis of thiol protease inhibitors. The inhibitors were found to be highly specific to thiol proteases and to have no effect on serine proteases and acid proteases.
Silver Fluoride Supported on Calcium Fluoride. Improved Fluorination and Halofluorination Reactions
Authors: Ando Takashi , Cork David G , Fujita Mitsue , Kimura Takahide , Tatsuno Toshio
Published: July 2006

Silver fluoride dispersed on the surface of calcium fluoride shows improved fluoride nucleophilicity for halogen exchange and addition to alkenes.
Preparation of New Types of Organosilicon Polymers. Effective Utilization of Disilane Fraction Produced in the Direct Synthesis of Methylchlorosilanes
Authors: Watanabe Hamao , Akutsu Yoshinori , Shinohara Akihito , Shinohara Shun-ichi , Yamaguchi Yoshino , Ohta Atsuko , Onozuka Mayumi , Nagai Yoichiro
Published: July 2006

Two types of new organosilicon polymers, (\llap– PhMeSiMe2Si ) \llap–n and (\llap– [PhMe2Si]MeSi ) \llap–n, were prepared starting from the disilane fractions produced in the Direct Synthesis, via phenylations giving 1,2- and 1,1-dichlorophenyltrimethyldisilane followed by sodium mediated condensations.
Facile Syntheses of Perfluoroalkylporphyrins. Electron Deficient Porphyrins II
Authors: Aoyagi Katsuhiro , TOI Hiroo , Aoyama Yasuhiro , Ogoshi Hisanobu
Published: July 2006

A variety of β-perfluoroalkylpyrroles were prepared from reaction of β-perfluoroalkyl-α,β-unsaturated ketones with p-toluenesulfonylmethylisocyanide in moderate yields. Tetrakis(perfluoroalkyl)porphyrins were readily obtained by oxidative cyclization of 2-hydroxymethyl-3-ethyl-4-perfluoroalkylpyrroles in acidic media.
Selective 1,5-Diene Synthesis. A Radical Approach
Authors: Yanagisawa Akira , Noritake Yoshiyuki , Yamamoto Hisashi
Published: July 2006

A new synthetic route to 1,5-dienes is described. Irradiation of a mixture of allyl bromides and allyl sulfides in the presence of hexamethylditin gives the cross-coupled products selectively.
Partial Oxidation of Propane over B–P Mixed Oxide Catalysts
Authors: Komatsu Takayuki , Uragami Yuji , Otsuka Kiyoshi
Published: July 2006

B–P mixed oxide was the active and selective catalyst for partial oxidation of propane. The selectivity and the yield of the partial oxidation products (propionaldehyde, acetone, acetaldehyde, propylene, etc.) were 50% and 27%, respectively, under the reaction conditions; T=806 K, P(C3H8)=20 kPa, P(O2)=30 kPa,and W/F=0.67 g h 1−1.
Photochromic Properties of 2-Hydroxychalcones
Authors: Matsushima Ryoka , Miyakawa Katsuhide , Nishihata Minoru
Published: July 2006

Photochemical and thermal interconversions between 2-hydroxychalcones (λmax 330–360 nm) and flavylium ions (400–460 nm) have been max studied in dilute aqueous ethanol solutions. The reactions were fairly clean and recyclizable, though varied with substituents and pH. The quantum yields for photochemical coloration were about 0.1 or less.
Effect of Rh Dispersion on Vapor Phase and Pressurized Hydroformylation of Ethylene over Rh/SiO2 Catalyst
Authors: Arakawa Hironori , Takahashi Nobuo , Hanaoka Takaaki , Takeuchi Kazuhiko , Matsuzaki Takehiko , Sugi Yoshihiro
Published: July 2006

A significant Rh dispersion effect was observed on vapor phase and pressurized hydroformylation of ethylene over Rh/SiO2 catalyst. Hydroformylation proceeds favorably over a high dispersed Rh/SiO2 having Rh particle size below approximately 30 Å. This remarkable dispersion effect is attributed to the change of both surface Rh atom composition and electronic state of Rh particle on SiO2. In addition, a striking structure sensitivity was also observed on the hydrogenation of ethylene to ethane as a by-product.
A New Stereoselective Synthesis of (E,Z)-Conjugated Hydroxy-Dienes, Key Intermediates for the Synthesis of HETES
Authors: Bloch Robert , Gasparini Giovanna , Girard Christian
Published: July 2006

A general and highly stereoselective synthesis of (E,Z)-conjugated hydroxy-dienes is described and its synthetic utility is illustrated by the synthesis of precursors of (±)-LTA4. methyl ester and (±)-5-HETE respectively.
Low Temperature Operation of Ceria-based Oxygen Sensors Using Perovskite-type Oxide Electrodes
Authors: Inoue Takanori , Eguchi Koichi , Arai Hiromichi
Published: July 2006

The lowest limit of operation temperature for ceria-based solid electrolyte oxygen sensor was significantly reduced with a use of perovskite-type oxide electrodes. In particular, the sensor with La0.6Sr0.4Co0.98Ni0.02O3 exhibited theoretical emf even at 200 °C. The cathodic overpotential, which was measured by current interruption method, was low for an electrode operative at low temperatures.
A Facile Hydroxymethylation of Acetylene Derivatives with Paraformaldehyde by Use of an Electrogenerated Base (EG Base)
Authors: Torii Sigeru , Okumoto Hiroshi , Kiyoto Taro , Hikasa Shigeki
Published: July 2006

Electrolysis of a mixture of paraformaldehyde and terminal acetylene derivatives smoothly provided the corresponding hydroxymethylated compounds in high yields by passing less than 1 F/mol of electricity. Electroreduction of paraformaldehyde generated in situ an efficient base (EG base), which catalyzed hydroxymethylation of the acetylenes.
Very Selective Enzymatic Hydrolysis of α-Ester of Dimethyl α-Dehydroglutamate with Papain
Authors: Shin Chung-gi , Takahashi Nobuyuki , Yonezawa Yasuchika
Published: July 2006

It was found that the selective ester hydrolysis of N-benzyloxycarbonyl-α-dehydroglutamic acid dimethyl ester [Cbz-ΔGlu (OMe)-OMe] with papain at pH 8.0 was achieved readily to give only a Cbz-ΔGlu(OMe)-OH almost quantitatively.
Stereochemistry of the Conversion of γ-Substituted (E)-Vinylsulfones to the Corresponding Allylsulfones. Determination of the Relative Degree of “Syn-Effect”
Authors: Inomata Katsuhiko , Hirata Takaki , Suhara Hiroshi , Kinoshita Hideki , Kotake Hiroshi , Senda Hitoshi
Published: July 2006

The relative degree of “syn-effect” for the γ-substituted vinylsulfones in their conversion to the corresponding allylsulfones with 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) was determined by observing E/Z ratios of the resulting allylsulfones as follows: CH3O– ≥ AcO– > CH3– > –CH2– >> t-Bu– and Ph–.
Nonenzymatic Transamination of Phenylglycine with 2-Oxoglutaric Acid Mediated by a Micellar Pyridoxal Model
Authors: Kondo Hiroki , Tanamachi Hiroto , Sunamoto Junzo
Published: July 2006

Phenylglycine undergoes transamination with 2-oxoglutaric acid in the presence of N-dodecylpyridoxal chloride (DPL) and hexadecyltrimethylammonium chloride (CTACl) under mild conditions. This is the first example of nonenzymatic overall transamination realized in the absence of metal ions.
Preparation and Properties of Alkyl Diarylbismuthinates. A New Class of Organic Pentavalent Bismuth Compounds
Authors: Ogawa Takuji , Murafuji Toshihiro , Iwata Kazuhiko , Suzuki Hitomi
Published: July 2006

Methyl diarylbismuthinates, a new class of organic pentavalent bismuth compounds, were prepared by the reaction of triarylbismuthines with chloramine-T in methanol and their chemical properties were investigated. These compounds possess a mild and selective oxidizing ability.
Partial Oxidation of Methane by Laser-initiated Chain Reaction
Authors: Oshima Yoshito , Saito Masaaki , Koda Seiichiro , Tominaga Hiro-o
Published: July 2006

Using N2O as a source of O(1D) by ArF excimer laser irradiation, an experimental work on partial oxidation of methane was performed at 200–350 °C and 300 or 600 Torr to find out methanol and several oxygen containing compounds with some C2–C3 hydrocarbons as products. Methane conversion and methanol selectivity increased in the presence of O2, indicating that a chain reaction was significantly promoted.
Synthesis of Novel Ni-Hectorite Inorganic Complexes
Authors: Torii Kazuo , Iwasaki Takashi
Published: July 2006

Novel Ni-hectorite inorganic complexes were synthesized hydrothermally from homogeneous Ni–Si hydrous oxide gel at 200 °C for 2 h. Dispersed slurries of these complexes showed rheological properties similar to those of natural smectites and, on heating, formed porous materials characterized by large specific surface areas and high thermal stability.
Preparation and Reactions of a Novel Five-Coordinate Ruthenium Complex [RuH(BINAP)2]PF6 and Formation of the First Chiral Molecular Hydrogen Complex [RuH(η2-H2)(BINAP)2]PF6 (BINAP = (R)-Bis(diphenylphosphino)-1,1′-binaphthyl)
Authors: Tsukahara Touru , Kawano Hiroyuki , Ishii Youichi , Takahashi Tamotsu , Saburi Masahiko , Uchida Yasuzo , Akutagawa Susumu
Published: July 2006

A five-coordinate ruthenium complex with the chiral bisphosphine, (R)-2,2′-bis(diphenylphosphino)-1,1′-binaphthyl (BINAP), [RuH(BINAP)2]PF6 (1) was prepared. The complex 1 was found to be a mixture of two isomers in solution. The exposure of 1 to hydrogen gas gave a chiral molecular hydrogen complex, trans-[RuH(η2-H2)(BINAP)2]PF6 (2). [RuD(η2-HD)(BINAP)2]+ ion formed by introducing D2 gas into a THF-d8 solution of 1 has a H-D coupling constant J(H,D) = 30 Hz (1:1:1), diagnostic of η2-HD complex.
Photooxygenation of Cyanoanthracenes via Their Radical Anions
Authors: Mizuno Kazuhiko , Tamai Toshiyuki , Nakanishi Isao , Ichinose Nobuyuki , Otsuji Yoshio
Published: July 2006

The photoreactions of 9,10-dicyanoanthracene and 9-cyanoanthracene in the presence of biphenyl in acetcnitrile under oxygen atmosphere gave anthraquinone and 9(10H)anthracenone, respectively, via the reaction of the radical anions of cyanoanthracenes with molecular dioxygen.
1,3-Asymmetric Induction in Acyclic Systems by Practical Application of Dithioacetal Group
Authors: Honda Yutaka , Morita Eitaro , Ohshiro Kimitaka , Tsuchihashi Gen-ichi
Published: July 2006

2-Lithio-2-(1-methyl-2-alkenyl)-1,3-dithianes showed 1,3-syn-selectivity on addition to aldehydes. Moreover this selectivity could be increased up to 97 %de by using equilibration of potassium alkoxide of the adduct in the presence of a ligand.
Preparation and Properties of Agglomerates Containing Fe4S4 Groups Cross-Linked by Meta- or Para-Benzenedithiolate Ligands
Authors: Ueyama Norikazu , Sugawara Takashi , Nakamura Akira , Yamaguchi Kizashi , Fueno Takayuki
Published: July 2006

N,N-Dimethylformamide(DMF)-soluble agglomerated [Fe4S4]2+ clusters (MW ca. 15000 in DMF) multiply bridged with 2,4,6-trimethylbenzene-1,3-dithiolate, benzene-1,3-dithiolate, or benzene-1,4-dithiolate show a redox potential of [Fe4S4]2+⁄+ at −1.32 V (vs. SCE), −1.13 V, or −0.95 V, respectively in DMF. These complexes effectively catalyze oxidation of benzoin by quinone.
Control of γ vs. ε Regioselectivity on the Nucleophilic Addition of 2,4-Pentadienylstannane to Aldehydes by Lewis Acid Co-ordination
Authors: Naruta Yoshinori , Nishigaichi Yutaka , Maruyama Kazuhiro
Published: July 2006

The BF3-mediated nucleophilic addition of 2- and 4-methoxymethyl-2,4-pentadienylstannanes to aldehydes selectively gives the corresponding γ adducts, while the reaction with sterically hindered aldehydes affors the corresponding ε adducts regardless of the tin reagents applied.
Thermal Stabilities and Catalytic Activities of Molybdenum Carbonyls Encapsulated in Zeolites
Authors: Maezawa Akinori , Kane Hiroshige , Okamoto Yasuaki , Imanaka Toshinobu
Published: July 2006

The thermal stabilities of Mo(CO)6 and subcarbonyl species encaged in a zeolite were found to depend markedly on the Si/Al ratio and cation involved. A highly selective formation of cis-2-butene was observed for the hydrogenation of butadiene over the subcarbonyl species. These thermal and catalytic properties of the carbonyls are correlated to the basicity of the zeolite.
A Simple New Synthesis of Macrolides by a Four Atom Ring Expansion of Cyclic Ketones through a Consecutive Intramolecular Homolytic Addition—β-Scission of Alkoxyl Radicals. A New Entry to the Synthesis of 15-Pentadecanolide (Exaltolide)
Authors: Suginome Hiroshi , Yamada Shinji
Published: July 2006

We describe a simple new synthesis of 16-membered macrolide, 15-pentadecanolide, based on a novel four atom ring expansion of cyclic ketones through a consecutive intramolecular homolytic addition—β-scission of alkoxyl radicals.
Syntheses and Properties of 7,9-Diphenyl- and 7,8,9-Triphenylcyclopent[a]acenaphthylenide Ions
Authors: Komatsu Koichi , Fujiura Ryuji , Okamoto Kunio
Published: July 2006

The 7,9-diphenyl- (3) and 7,8,9-triphenylcyclopent[a]acenaphthylenide ions (2) have been prepared and fully characterized in comparison with the pentaphenylcyclopentadienide ion (1). The anions 2 and 3 are nearly 1 pK unit more stabilized and about 0.05 V more readily oxidized than the anion 1. Whereas the one-electron oxidation of 2 affords the persisting radical, the oxidation of 3 gives the dimeric compound quantitatively.
A Promoting Effect of Phosphorus-Addition to Cu/SiO2 on Selective Synthesis of Formaldehyde by Dehydrogenation of Methanol
Authors: Yamamoto Takeshi , Shimoda Akihide , Okuhara Toshio , Misono Makoto
Published: July 2006

Copper supported on SiO2, which was prepared from Cu(OCOCH3)2 and to which P was added, was a selective catalyst (80–85% at about 50% conversion) for the formation of HCHO by the dehydrogenation of CH3OH at 500 °C. Among various additives such as P, B, K, Li, Mo, and Zn, the addition of P to the Cu/SiO2 significantly enhanced the rate for the formation of HCHO with an increase in the selectivity.
Selective Dehydrogenation of Alkylamines to Nitriles over Metal Oxide Catalysts
Authors: Xu Bo-Qing , Yamaguchi Tsutomu , Tanabe Kozo
Published: July 2006

Decomposition of alkylamines over ZrO2, SiO2–Al2O3, and MgO were examined in a closed recirculation reactor. ZrO2 showed the highest activities and selectivities for the formation of nitriles, especially in di- and trialkylamine decomposition. In contrast, SiO2–Al2O3 catalyzed dealkylation and deamination reactions exclusively. MgO exhibited high selectivity for the dehydrogenation of primary alkylamine. The high activity of ZrO2 is attributed to its acid-base bifunctional properties.
High Deoxygenation Ability of Rh Carbonyl Clusters toward Oximes Leading to Nitrile Formation
Authors: Kaneda Kiyotomi , Doken Kazuhiro , Imanaka Toshinobu
Published: July 2006

Nitriles are selectively prepared by the reaction of aldoximes with CO and H2O in the presence of rhodium carbonyl clusters. Rh12 and Rh13 carbonyl cluster anions can be detected by IR spectroscopy.
Multiple-mode Responsive Device. Photo- and Electro-Chromic Composit Thin Film of Tungsten Oxide with Titanium Oxide
Authors: Ohtani Bunsho , Atsumi Takashi , Nishimoto Sei-ichi , Kagiya Tsutomu
Published: July 2006

Optically transparent thin film of tungsten oxide and its composit film with titanium oxide, prepared on the glass plates by repeated dip-coating method, exhibited dual ability of photo- and electro-chromism in an aqueous formic acid solution.
The Important Step of the Selective Oxidation of n-Butane over (VO)2P2O7
Authors: Miyamoto Koichi , Nitadori Taihei , Mizuno Noritaka , Okuhara Toshio , Misono Makoto
Published: July 2006

Catalytic oxidations of n-butane, 1-butene, and 1,3-butadiene to maleic anhydride have been carried out over (VO)2P2O7, α-VOPO4, and β-VOPO4, of which the surface and bulk structures were examined by XPS and XRD. It was concluded that the reason why (VO)2P2O7 was much superior in the selective oxidation of butane was its very high selectivity in the step of the dehydrogenation of butane to butene.
Ferroelectric Properties of Binary Mixtures of Chiral Smectic C Liquid Crystals
Authors: Kikuchi Hirotsugu , Miyamoto Akira , Huang Wien Hwang , Kajiyama Tisato
Published: July 2006

Binary mixtures composed of ferroelectric liquid crystals with various molecular lengthes were prepared. Some of these binary mixtures showed thermodynamically stable ferroelectric phase at around room temperature. The dielectric properties, tilt angles and response times of these mixtures under an imposed electric field were investigated as a function of molecular length of the component liquid crystals. The binary mixture which consists of the liquid crystalline molecules with a similar molecular length exhibited excellent characteristics as ferroelectric liquid crystal for display application.
Electrochemical Control for Oxidative Coupling of Methane over LiNiO2 Using Solid Electrolytes
Authors: Otsuka Kiyoshi , Suga Katsuo , Yamanaka Ichiro
Published: July 2006

The catalytic conversion of methane into ethylene and ethane over LiNiO2 was improved considerably when the oxygen on the catalysts was removed electrochemically from the catalyst by oxygen pump through a stabilized zirconia electrolyte.
Synthesis of α-Arylmethylenethiocamphor S-Oxides and S-Imides
Authors: Motoki Shinichi , Toba Yasumasa , Karakasa Takayuki , Saito Takao
Published: July 2006

α-Arylmethylenethiocamphor S-oxides and S-imides were synthesized from the corresponding thioketones. Most of them were found to be stable α,β-unsaturated thione S-oxides and S-imides.
Enhancement of Trimethylamine Sensitivity of Semiconductor Gas Sensors by Ruthenium
Authors: Egashira Makoto , Shimizu Yasuhiro , Takao Yuji
Published: July 2006

The gas sensitivities to trimethylamine (TMA) of semiconductor gas sensors with several additives have been investigated to develop a new type of sensor capable of detecting freshness of fishes. Among the additives studied, ruthenium was the most suitable sensitizer to enhance the gas sensitivity to TMA. Furthermore, the TiO2 + Ru elements exhibited the highest sensitivity at about 560 °C. The role of the ruthenium supported on semiconductors was briefly described.
Neutral Carrier-Type Silver Ion-Selective Electrode Based on Lipophilic Monothiacrown Ether
Authors: Oue Masatoshi , Kimura Keiichi , Akama Kazuhiro , Tanaka Minoru , Shono Toshiyuki
Published: July 2006

Dodecyl-16-crown-5, which contains one sulfur and four oxygen atoms, was synthesized and tested for its usefulness as a neutral carrier for Ag+-selective electrodes. The resulting ion-selective electrodes exhibited Nernstian response to Ag+ in a wide activity range. The ion selectivities against other heavy metal ions and alkali and alkaline-earth metal ions were quite excellent.
Two Novel Metal-complex Host Structures Consisting of Cyanocadmate Coordination Polyhedra. Clay-like and Zeolite-like Structures
Authors: Kitazawa Takafumi , Nishikiori Shin-ichi , Kuroda Reiko , Iwamoto Toschitake
Published: July 2006

The metal-complex host of a clathrate compound [Cd3{NH(CH3)2(CH2)3NH2}(CN)7]·C6H5F has a layered structure like a clay consisting of the linkage of tetrahedral Cd(CN)4 and Cd(CN)3(NC), and octahedral Cd(NC)5[NH2(CH2)3NH(CH3)2) coordination polyhedra. The host of another clathrate [Cd3(CN)7]·{NH(CH3)2(CH2)3NH2}·(CH2ClCH2Cl) has a three-dimensional structure like a zeolite comprised of the linkage of tetrahedral Cd(CN)4 and Cd(CN)3(NC), and octahedral Cd(NC)6 coordination polyhedra; the 3-(dimethylammonio)propylamine is accommodated as a cationic guest in the cavity formed in the host structure.
Crystal Structures of Organic Superconductor, (BEDT-TTF)2Cu(NCS)2, at 298 K and 104 K
Authors: Urayama Hatsumi , Yamochi Hideki , Saito Gunzi , Sato Shoichi , Kawamoto Atsushi , Tanaka Jiro , Mori Takehiko , Maruyama Yusei , Inokuchi Hiroo
Published: July 2006

The crystal structures of an organic superconductor (BEDT-TTF)2Cu(NCS)2 (Tc=10.4 K) at 298 K and 104 K are determined by X-ray analysis. The packing pattern of donors is nearly analogous to κ-(BEDT-TTF)2I3. The counter anion, Cu(NCS)2−, has no positional disorder and constructs a peculiar sheet where a copper ion is coordinated with a sulfur and two nitrogen atoms to form a one-dimensional polymer with a permanent dipole moment.
Electrochemical Carbon-Skeleton Rearrangements as Catalyzed by Cyano-Coordinated Hydrophobic Vitamin B12
Authors: Murakami Yukito , Hisaeda Yoshio , Ozaki Toshiaki , Matsuda Yoshihisa
Published: July 2006

Electrochemical carbon-skeleton rearrangements catalyzed by heptamethyl cobyrinate perchlorate proceeded more efficiently upon coordination of the cyanide ion to the central cobalt atom, and such enhanced catalysis was originated from facilitated formation of an anionic intermediate.
Bis(η5-cyclopentadienyl)diphenyltitanium-catalyzed Hydrosilylation of Ketones
Authors: Nakano Taichi , Nagai Yoichiro
Published: July 2006

Bis(η5-cyclopentadienyl)diphenyltitanium activated a Si–H bond of diphenylsilane, methylphenylsilane, and phenylsilane effectively to bring about the reaction with ketones giving hydrosilylation products, alkoxysilanes, in good yields with good selectivity.
Optical Resolution of 2-Methylpiperazine by Complex Formation with Optically Active 1-Phenyl-1-(o-chlorophenyl)prop-2-yn-1-ol and 1,6-Diphenyl-1,6-di(o-chlorophenyl)hexa-2,4-diyne-1,6-diol
Authors: Toda Fumio , Tanaka Koichi , Kido Masaru
Published: July 2006

An efficient optical resolution of 2-methylpiperazine was achieved by complex formation with the title host compounds. X-Ray crystal structure of a 1:2 complex of (S)-(+)-piperazine and (R)-(−)-1-phenyl-1-(o-chlorophenyl)prop-2-yn-1-ol was studied.
A New Ambient Pressure Organic Superconductor Based on BEDT-TTF with TC Higher than 10 K (TC=10.4 K)
Authors: Urayama Hatsumi , Yamochi Hideki , Saito Gunzi , Nozawa Kiyokazu , Sugano Tadashi , Kinoshita Minoru , Sato Shoichi , Oshima Kokichi , Kawamoto Atsushi , Tanaka Jiro
Published: July 2006

An ambient pressure superconductivity of (BEDT-TTF)2Cu(SCN)2 was observed by d.c. magnetic susceptibility and electrical conductivity measurements. The superconducting critical temperature is the highest (TC=10.4 K) among the organic superconductors so far obtained, even though the anion has a positional disorder in the crystal.
Elevations of Nematic–Isotropic Transition Temperature and Dichroic Ratio of Nonmesomorphic Guest–Nematic Host System with Increasing Guest Concentration
Authors: Kobayashi Michio , Maeda Akihiko , Tanizaki Yoshie , Okubo Jun , Hoshi Toshihiko
Published: July 2006

The nematic-isotropic transition temperature of 4-cyano-4′-pentylbiphenyl (host) has been elevated by admixture of 1,5-di-(p-n-butylanilino)-anthraquinone (guest), the elevation being as much as 2.1 °C for 1 mol% guest concentration (β=−0.689). This phenomenon has been considered to be attributable to the guest-host interaction which must be at least attractive and, in addition, of “many-body” type.
Reversible Change in the Structure of Cerium Oxide in Alumina-Supported Catalyst
Authors: Miki Takeshi , Ogawa Takao , Ueno Akifumi , Matsuura Shinji , Sato Masayasu
Published: July 2006

Ceria in the alumina-supported catalyst was found to react with the alumina to produce CeAlO3 when heated in flowing H2 and to return reversibly to the original ceria particles when calcined in flowing O2 at 1173 K, while lanthana was proved to react irreversibly with the alumina to from LaAlO3.