bluuebunny/crossref_metadata_2025_split huggingface dataset:
Novel Annulation of 6-Aryl-3-ethoxy-6-hydroxy-2,4-hexadienoates to 5-Benzoyl-3-ethoxycyclopent-2-en-1-ones under Basic Conditions
Authors: Kawano Tomikazu , Islam Md Saiful , Jeong Jae-Seung , Ueda Ikuo 
Published: July 2004

Abstract
Reaction of 6-aryl-3-ethoxy-6-hydroxy-2,4-hexadienoates with potassium hydroxide in ethanol gave 5-benzoyl-3-ethoxycyclopent-2-en-1-ones in moderate yields.
Esterase Catalyzed Regio- and Enantio-selective Hydrolysis of Substituted Carboxylates
Authors: Ozaki Eiji , Sakashita Keiichi 
Published: July 2004

Abstract
Optically active α-substituted carboxylic acid derivatives were obtained with regio- and enantio-selective hydrolysis catalyzed by esterase from Pseudomonas putida MR-2068. Substrate specificities were summarized in empirical rule to predict the enantiopreferences of the esterase. High regio-selectivities were also discussed with binding models.
The Molecular Orientation of a Peptide-based Amphiphile at Hexane/Water Interface
Authors: Hosokawa Hirofumi , Kinoshita Takatoshi , Tsujita Yoshiharu , Yoshimizu Hiroaki 
Published: July 2004

Abstract
A rod-like amphiphile, hydrophobic poly(γ-methyl l-glutamate) containing β-cyclodextrin as a hydrophilic terminal group (PMG-CyD), lay down in its monolayer membrane at air/water interface, however, it has a possibility for the perpendicular orientation at hexane/water interface above specific surface pressure.
Effects of Hydrostatic Pressure on DNA Minor Groove Binding as Studied by Restriction Endonuclease Protection Assay (REPA)
Authors: Tang Guo-Qing , Tanaka Naoki , Kunugi Shigeru 
Published: July 2004

Abstract
The effect of pressure on the interaction of minor groove binders with the pBR322 DNA was investigated by using the restriction endonuclease protection assay. The pressure employed alone did not provide measurable enzyme protection whereas it improved the DNA protection ability of drugs. Hydration change terms were proposed to be responsible for the observed pressure effect.
Complex Formation between Water-Soluble Porphyrin and Cationic Surfactant below the Critical Micelle Concentration
Authors: Hinoue Teruo , Kobayashi Junji , Ozeki Toru , Watarai Hitoshi 
Published: July 2004

Abstract
It was found that a visible absorption spectrum of 5, 10, 15, 20-tetraphenyl-21H, 24H-porphinetetrasulfonic acid (TPPS) drastically changes with concentration of cetyltrimethylammonium bromide (CTAB). This spectral change is due to the successive complex formation between them in aqueous solution (pH 7). The formation constants were determined by applying a factor analysis with equilibrium constraints (FAEC) to the spectra of TPPS solutions with different concentrations of CTAB.
Nonplanar σ2,π-and Planar σ2-Enediamide Coordinations of 1,4-Di(p-methoxyphenyl)-1,4-diaza-1,3-butadiene (=MeOC6H4-DAD) on Ta(η5-C5R5) Fragments (R=H,Me): Crystal Structures of TaCl2 (σ2,π-MeOC6H4-dad)(η5-C5H5) and Ta(σ2-MeOC6H4-dad)(η5-C5Me5)(η4-1,3-butadiene)
Authors: Mashima Kazushi , Matsuo Yutaka , Tani Kazuhide 
Published: July 2004

Abstract
Treatment of TaCl4(η5-C5R5)[1 ; R = H (a), R = Me (b)] with a dilithio compound of 1,4-di(p-methoxyphenyl)-1,4-diaza-1,3-butadiene (abbr. MeOC6H4-DAD) gave TaCl2(σ2,π-MeOC6H4-dad)(η5-C5R5) [2; R = H (a), R = Me (b)]. Complexes 2 reacted with a magnesium-butadiene compound to afford Ta(σ2-MeOC6H4-dad)(η5-C5R5)(η4-1,3-butadiene)[3; R = H (a), R = Me (b)]. Crystal structures of 2a and 3b were determined by X-ray analysis.
The Synergistic Extraction of Lanthanides with Trifluoroacetylcycloalkanones and Trioctylphosphine Oxide
Authors: Umetani Shigeo , Kawase Yusuke , Le Quyen T H , Matsui Masakazu 
Published: July 2004

Abstract
The separation of lanthanides in the solvent extraction into chloroform with trifluoroacetylcycloalkanones having a narrowed oxygen-oxygen distance has been found to improve by an addition of trioctylphosphine oxide as a synergist.
Rare Earth Elements in Human Blood Serum as Determined by Inductively Coupled Plasma Mass Spectrometry
Authors: Inagaki Kazumi , Haraguchi Hiroki 
Published: July 2004

Abstract
The multielement determination of all rare earth elements in human blood serum by inductively coupled plasma mass spectrometry has been studied, where the blood serum sample was digested with nitric acid and perchloric acid, and then rare earth elements were preconcentrated by using the chelating resin prior to the determination. It was found that the concentrations of rare earth elements in human blood serum were at the ppt (10−12 g/ml) level.
Chemoselectivities in Palladium Catalyzed Eneyne Cyclizations
Authors: Oh Chang Ho , Rhim Chul Yun , Hwang Sun Kyung 
Published: July 2004

Abstract
Palladium catalyzed 1,7-eneyne cyclizations proceeded endo- or exo-mode depending on solvent: polar solvent afforded the exo-mode predominantly, non-polar solvent did the endo mode product.
Chemical Ionization Mass Spectra of Benzene and Toluene at Low CH4 Pressures
Authors: Tsuji Masahara , Oda Erika , Nishimura Yukio 
Published: July 2004

Abstract
Chemical ionization (CI) of benzene and toluene by the CH5+, C2H5+, and C3H5+ ions has been studied in an ion-trap type GC/MS at low CH4 pressures. The main product ion from benzene was C6H7+ for all the reactant ions, and that from toluene was C7H9+ for the CH5+ and C2H5+ ions, and C7H7+ for the C3H5+ ion. Initial adduct ions, which had been found in previous CI spectra at high CH4 pressures, were not observed.
Polyvinylalcohol Microgel
Authors: Fukutomi Takashi , Asakawa Kazuaki , Kihara Nobuhiro 
Published: July 2004

Abstract
Soap-free copolymerization of vinyl acetate and N,N′-dimethyl-N,N′-divinyl-sebacoyldiamide followed by alkaline hydrolysis afforded poly(vinyl alcohol) microgel.
A New and Efficient Method for the Chemoselective Reduction of Azidoarenes and Aroylazides: Use of Zinc-Cobalt Chloride
Authors: Baruah Mukulesh , Hussain Akhtara , Prajapati Dipak , Sandhu Jagir S 
Published: July 2004

Abstract
Reduction of azidoarenes and aroylazides to the parent primary amines or amides respectively occurs in excellent yields upon treatment with a novel reduction system consisting of Zn-CoCl2·6H2O-THF.
Magnetic Field Effect on Photochromism. Recombination of 2,3,4,5-Tetraphenylpyrrolyl Radicals
Authors: Nakai Takako , Tani Masanao , Nishio Satoru , Matsuzaki Akiyoshi , Sato Hiroyasu 
Published: July 2004

Abstract
Photochromism of the dimer of 2,3,4,5-tetraphenylpyrrolyl radical consists of coloration by photochemical scission and decoloration by thermal recombination of radicals. Application of external magnetic field gave a pronounced retarding effect on the second-order recombination rate constant of escaped radicals.
Pivotal Role of (E)-3-Carbamoyl-1-propenylboronic Acid in the Combination of Suzuki-Miyaura Coupling and Enzyme Reactions: Synthesis of (3E,5E)- and (3E,5Z)-6-Phenyl-3,5-hexadienoic Acid
Authors: Sugai Takeshi , Yokoyama Masahiro , Yamazaki Takahiro , Ohta Hiromichi 
Published: July 2004

Abstract
The first example of the enzyme-catalyzed hydrolysis of a nitrile bearing alkenylboronic acid functionality and its application to the synthesis of dienecarboxylic acids are described. (E)-3-Carbamoyl-1-propenylboronic acid was obtained by an incubation of the corresponding nitrile with Rhodococcus rhodochrous IFO 15564. Palladium(0)-catalyzed cross-coupling reaction of the product with (E)- and (Z)-bromoalkenes afforded the (3E,5E)- and (3E,5Z)-unsaturated amides, respectively. The second incubation of the above amides with the same microorganism provided the carboxylic acids with the defined configuration of conjugated double bonds.
Liquid Crystalline Behavior of Linear Permethyloligosilanes
Authors: Yatabe Tetsuo , Kaito Akira , Tanabe Yoshikazu 
Published: July 2004

Abstract
Permethyloligosilanes, Me(SiMe2)nMe where n = 9, 10, 11, and 12, show the enantiotropic smectic B phase. In the liquid crystalline state, the silicon chains of these oligosilanes adopt all-trans conformation.
Synthesis of (6R,7R)-d-gluco-l-gulo-6,7-dodecodiulose-(6,2),(7,11)
Authors: Mochizuki Takashi , Shiozaki Masao 
Published: July 2004

Abstract
(6R,7R)-d-gluco-l-gulo-6,7-dodecodiulose-(6,2),(7,11) was synthesized from 3,4,6-tri-O-benzyl-1-stannyl-d-glucal via stereospecific addition reaction of lithioglucal to 2,3,4,6-tetra-O-benzyl-d-glucono-1,5-lactone.
Ionic and Radical Substitution in Cobaltadithiolene Ring Induced by Dibenzoyl Peroxide
Authors: Sugimori Akira , Yanagi Kumiko , Hagino Genjiro , Tamada Minako , Kajitani Masatsu , Akiyama Takeo 
Published: July 2004

Abstract
The reaction of (η5-cyclopentadienyl)(1,2-ethenedithiolato)cobalt(III) complexes with dibenzoyl peroxide at moderate temperature (40 °C) brings about the substitution of a benzoyloxy group for a hydrogen in the cobaltadithiolene ring in an ionic mechanism. At 110 °C in a toluene solution, the substitution of a benzyl group for a hydrogen in the cobaltadithiolene ring in a radical mechanism occurs competitively with benzoyloxylation.
A Sequence of Palladium-Catalyzed Borylation of Allyl Acetates with Bis(pinacolato)diboron and Intramolecular Allylboration for the Cyclization of Oxo-2-alkenyl Acetates
Authors: Ahiko Taka-aki , Ishiyama Tatsuo , Miyaura Norio 
Published: July 2004

Abstract
The cross-coupling reaction of bis(pinacolato)diboron with oxo-2-alkenyl acetates in toluene at 50 °C in the presence of Pd(dba)2/2 AsPh3 (3 mol%) to give allylboronates was followed by the intramolecular allylboration at 100 °C. The sequence provided cyclic homoallyl alcohols in high yields.
Electroluminescence of Bis[N-hexadecyl-8-hydroxy-2-quinoline carboxamide]cadmium
Authors: Ouyang Jianming , Li Ling , Tai Zihou , Lu Zuhong , Wang Guangming 
Published: July 2004

Abstract
An electroluminescent (EL) device with a single layer structure (ITO/emitting layer/Al) was constructed using an intensely fluorescent amphiphilic complex, bis[N-hexadecyl-8-hydroxy-2-quinoline carboxamide]cadmium (Cd(HQ)2), for the emitter material. Greenish-yellow EL emission with a luminance of about 1200 cd/m2 was observed with a low voltage drive (7 V).
Synthesis and Axial-Ligand Binding of Zinc Complexes of Amphiphilic Porphyrins Containing a Hydrophobic Binding Pocket
Authors: Imai Hiroyasu , Munakata Hiroki , Takahashi Atsuko , Nakagawa Shigeo , Uemori Yoshio 
Published: July 2004

Abstract
Amphiphilic zinc porphyrins containing two sulfonate groups and a hydrophobic binding pocket were synthesized efficiently and characterized. Binding of pyridine, butylamine, and pyrrolidine to the zinc complexes was examined spectrophotometrically in water and in chloroform. The binding behavior was discussed on the basis of the binding constants.
Synthesis of Tetra- and Penta-Substituted Pyrrole Derivatives from Azazirconacyclopentene and Acyl Halide in the Presence of CuCl
Authors: Dekura Fumiko , Honda Takahiro , Mori Miwako 
Published: July 2004

Abstract
Tetra- and penta-substituted pyrrole derivatives 5 and 6 were synthesized from acyl halide and azazirconacyclopentene 1, prepared from iminosilaacyl complex 2 and alkyne 4 in the presence of LiEt3BH, by transmetalation of zirconium to copper by a one-pot reaction.
Synthesis and Electro-optical Properties of Novel Liquid Crystals Having a Cyclohexyl Trifluoromethyl Ether Moiety
Authors: Kanie Kiyoshi , Tanaka Yoichiro , Shimizu Masaki , Takehara Sadao , Hiyama Tamejiro 
Published: July 2004

Abstract
A convenient synthetic method is described for new type liquid crystals (LCs) containing a cyclohexyl trifluoromethyl ether moiety. The novel LCs are shown to exhibit mesophases and decrease birefringence and threshold voltage of host LCs upon mixing by 20 wt%.
Distortion of the Unit Cell of Platinum(II) Complexes under Light Irradiation
Authors: Ikagawa Takashi , Okumura Toshihiko , Otsuka Takuhiro , Kaizu Youkoh 
Published: July 2004

Abstract
The shift of X-ray powder pattern of Platinum(II) complexes was observed under light irradiation by using X-ray powder diffractometer. The peaks were returned to the original one when the irradiation of light was cut off. The observed X-ray powder patterns show that the unit cell of [Pt(acac)2] is expanded under light irradiation, however, that of [Bu4N]4[Pt2(pop)4] (pop2−=P2O5H22−) is contracted.
Stereoselective Synthesis of the LM Ring Moiety of Ciguatoxin: Reagent Control of Asymmetric Dihydroxylation
Authors: Oishi Tohru , Shoji Mitsuru , Kumahara Naomi , Hirama Masahiro 
Published: July 2004

Abstract
Stereoselective synthesis of the LM ring moiety of ciguatoxin was achieved from (R)-(E)-1-benzyloxy-2-hydroxy-3-pentene via Ireland-Claisen rearrangement, iodolactonization, and reagent-controlled asymmetric dihydroxylation.
Synthesis of Perhydroquinolinones Bearing an Angular Methyl Group via Lewis Acid Catalyzed Hetero-Diels-Alder Cyclization
Authors: Stanetty Peter , Mihovilovic Marko D 
Published: July 2004

Abstract
The first results utilizing the sterically demanding diene 1 in hetero Diels-Alder reactions are reported. The effect of commonly used Lewis acids and the substitution pattern of various imines on the mechanism of the reaction with the diene 1 is discussed.
Molybdenum-Catalyzed Aromatic Substitution with Olefins and Alcohols
Authors: Shimizu Isao , Khien Kuok Meng , Nagatomo Miki , Nakajima Takayuki , Yamamoto Akio 
Published: July 2004

Abstract
A new type of electrophilic aromatic substitution without using organic halides has been realized by using Mo(CO)6 catalyst.
Dioxygenation of a Molybdenum(IV) Porphyrin Complex as Studied by an In Situ Quartz Crystal Microbalance/UV-vis Spectroscopy Combined Method
Authors: Hoshiba Koji , Nishimura Noboru , Shimazu Katsuaki , Imamura Taira , Sasaki Yoichi 
Published: July 2004

Abstract
Changes with time in mass and absorbance, accompanied by the dioxygenation of MoIVO(tmp) (tmp = 5,10,15,20-tetramesitylporphyrinato dianion) at room temperature in the sublimated solid film, were simultaneously followed by an in situ quartz crystal microbalance (QCM)/UV-vis spectroscopy combined method. The two curves synchronized accurately. In the most cases of the film systems with (2.34 - 7.13) × 10−8 mol cm−2 of coverage, the dioxygenation attained ca. 82% completion in 120 s in dry dioxygen atmosphere.
Synthesis of Bis(2,6-dimesityl-4-methylphenyl)phosphaarsene and EPR of its Radical Anion
Authors: Tsuji Kyoko , Fujii Yuuichi , Sasaki Shigeru , Yoshifuji Masaaki 
Published: July 2004

Abstract
Novel bis(2,6-dimesityl-4-methylphenyl)phosphaarsene was synthesized by the coupling reaction of 2,6-dimesityl-4-methylphenylphosphine with dichloro(2,6-dimesityl-4-methylphenyl)arsine in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene and isolated as stable crystals. The radical anion generated by the sodium metal reduction of the phosphaarsene was investigated by X-band EPR.
Almost Perfect Enantio-differentiating Hydrogenation of Methyl 3-Cyclopropyl-3-oxopropanoate over Tartaric Acid Modified Raney Nickel Catalyst
Authors: Nakagawa Satoshi , Sugimura Takashi , Tai Akira 
Published: July 2004

Abstract
Almost perfect enantio-differentiating hydrogenation was achieved by asymmetrically modified heterogeneous catalyst. The hydrogenation of methyl 3-cyclopropyl-3-oxopropanoate over tartaric acid modified Raney nickel gave methyl 3-cyclopropyl-3-hydroxypropanoate in more than 98% of optical purity.
Cis-Specific Polymerization of Norbornene Catalyzed by Tungsten Based Complex Catalysts Bearing an O–N–O Tridentate Ligand
Authors: Nakayama Yuushou , Ikushima Naoko , Nakamura Akira 
Published: July 2004

Abstract
Tungsten complexes bearing O–N–O tridentate ligands, WOCl2{(OCR12CH2)(OCR22CH2)(NC5H3)} (3: R1 = Ph, R2 = Me; 4: R1 = R2 = Me) were synthesized. The complex 3 was revealed to have octahedral structure with two oxygen atoms of alkoxide in trans position by X-ray analysis. These complexes catalyze the polymerization of norbornene upon activation with Et3Al and the catalyst system 3/2Et3Al yielded polynorbornenes with high cis content.
Characteristic L-shape Absorbance-time Curve in Indicator Reaction for the Determination of Catalyst
Authors: Takahata Keiji , Nagoshi Toshimasa , Igarashi Shukuro 
Published: July 2004

Abstract
The simultaneous decomposition reaction of a catalyst and indicator shows the characteristic L-shape absorbance-time curve. This reaction system provides the kinetic behavior (i.e., the chemical amplification) and the equilibrium behavior. Also, it becomes possible to have a highly-sensitive determination of a catalyst without the limitation of measuring time. This new concept of sensing was realized using the 5,10,15,20-tetrakis(4-sulfophenyl)porphine (indicator) / iron-chlorophyllin complex (catalyst) / peroxomonosulfate [KHSO5] (oxidant) system and copper-phthalocyanine-tetrasulfonate / hemoglobin / KHSO5 system.
The First Total Synthesis of (−)-Benzomalvin A via Intramolecular Aza-Wittig Reactions
Authors: Sugimori Toshiyuki , Okawa Tomohiro , Eguchi Shoji , Yashima Eiji , Okamoto Yoshio 
Published: July 2004

Abstract
The first total synthesis of (−)-benzomalvin A 1, which possesses quinazolin-4(3H)-one moiety and 1,4-benzodiazepin-5-one moiety, was described. Both of 6- and 7-membered ring skeletons were efficiently constructed by intramolecular aza-Wittig reactions as the key reactions.
Adiabatic Photocycloreversion of Bridged Benzene-Anthracene Biplanemers: Controlling of the Efficiency of the Excited Product Formation by Auxiliary Substituents on the Side-Chains
Authors: Okamoto Hideki , Satake Kyosuke , Kimura Masaru 
Published: July 2004

Abstract
The efficiency for excited product formation in the adiabatic photocycloreversion of bridged biplanemer 1 was controlled by the size of its side-chain substituents which changed the interchromophore distance in the photoproduct 2.
Synthesis of Microporous Aluminum Methylphosphonate AlMepO-α by Steam-Induced Topotactic Transformation of AlMepO-β
Authors: Maeda Kazuyuki , Sasaki Akitsugu , Watanabe Kunihiro , Kiyozumi Yoshimichi , Mizukami Fujio 
Published: July 2004

Abstract
Steaming treatment of AlMepO–β at 500 °C induces transformation into AlMepO–α. This procedure easily gives pure AlMepO–α with a large adsorption capacity. A topotactic transformation mechanism through coordination of water molecules at an aluminum site is proposed from comparison of both the framework structures.
Cyclic AMP Detection by Electrode Modified with 17mer Oligopeptide
Authors: Katayama Yoshiki , Ohuchi Yuya , Nakayama Masamichi , Maeda Mizuo , Higashi Hideyoshi , Kudo Yoshihisa 
Published: July 2004

Abstract
An oligopeptide (17mer) which recognizes cyclic AMP was designed and applied to electrochemical detection of cAMP. Redox peak currents on cyclic voltammograms of ferrocyanide/ferricyanide redox couple with Au electrode which was modified with the peptide showed response dependently on the cAMP concentration, while the electrode showed only slight response to ATP that is a structural analog of cAMP.
Tanzawaic Acids A, B, C, and D: Inhibitors of Superoxide Anion Production from Penicillium citrinum
Authors: Kuramoto Makoto , Yamada Kaoru , Shikano Mayumi , Yazawa Kazunaga , Arimoto Hirokazu , Okamura Tomoyuki , Uemura Daisuke 
Published: July 2004

Abstract
Tanzawaic acids have been isolated from Penicillium citrinum and their structures were elucidated by spectroscopic analysis. Their relative stereochemistries were also clarified by detailed analyses of 1H–1H coupling constants and NOE data. Tanzawaic acid B (GS-1302-1) significantly inhibits superoxide anion production in human neutrophils.
Drop Based Visual Fluorometry of Aluminium at ppb Level with 2,2′-Dihydroxy-azobenzene by Using Octadecylsilanized Silica Thin Layer
Authors: Mizuguchi Hitoshi , Yasuda Hiroko , Kaneko Emiko , Yotsuyanagi Takao 
Published: July 2004

Abstract
A new visual fluorometry for trace aluminium has been developed. The method is based on specific immobilization of its chelate with 2,2′-dihydroxyazobenzene (H2L) on an octadecylsilanized silica thin layer. An aqueous sample drop was evaporated into a fleck on the water-repellent surface, and chromatography was performed with acetone. The fluorescent chelate, [AlL]+, remained at the spotting position, whereas the other chelates were eluted to a position close to the solvent front.
Entropy-Dominating Strong Binding of Carboxylate Anions to Protonated Aminocyclodextrin
Authors: Kano Koji , Kitae Takashi , Takashima Hiroshi , Shimofuri Yoshiaki 
Published: July 2004

Abstract
Protonated heptakis(6-amino-6-deoxy)-β-cyclodextrin complexes with p-methylbenzoate and N-acetyltryptophan anions more strongly than a monoamino-β-cyclodextrin cation. Such a strong association is dominated by large and positive entropy changes for complexation which might be due to extensive dehydration from both host and guest upon complexation.
Oxidative Dehydrogenation of Ethane over Lanthanum-Substituted Layered Complex Bismuth Chloride Oxide Catalysts
Authors: Lin Suiwen , Ueda Wataru 
Published: July 2004

Abstract
By the replacement of bismuth ion by lanthanum ion in the cation-oxygen sheet of SrBi3O4Cl3 catalyst having a layer structure, c value of the lattice decreased clearly, making the cation-oxygen sheet and the chlorine sheet closer, and the catalytic activity increased prominently for the oxidative dehydrogenation of ethane. The activity increase can be attributed to the enhanced oxidation ability of the cation-oxygen sheet by the introduction of La.
Synthesis and Structure of a Trinuclear Rhenium Cluster Complex [PEt3H][Re3(μ3-S)(μ-S)3Cl6(PEt3)3]
Authors: Miyake Naofumi , Imoto Hideo , Saito Taro 
Published: July 2004

Abstract
Reaction of [Re3(μ3-S)(μ-S2)3Cl6]Cl with triethylphosphine in benzene formed [PEt3H][Re3(μ3-S)(μ-S)3Cl6(PEt3)3]. The triangular cluster has eight metal cluster electrons and the cluster core resembles that of [Mo3(μ3-S)(μ-S)3Cl4L5] cluster complexes.
Li+ Transference Number Enhancement in Polymer Electrolytes by Incorporation of Anion Trapping Boroxine Rings into the Polymer Host
Authors: Mehta Mary Anne , Fujinami Tatsuo 
Published: July 2004

Abstract
Polymer electrolytes incorporating boroxine rings with pendant oligoether side chains and a variety of dissolved lithium salts were prepared. High ionic conductivities and Li+ transference numbers were observed, the latter being ascribed to the anion trapping ability of the boroxine ring.
Synthesis of α,β-Unsaturated Carboxylic Acids by Nickel(II)-Catalyzed Electrochemical Carboxylation of Vinyl Bromides
Authors: Kamekawa Hisato , Kudoh Hiroki , Senboku Hisanori , Tokuda Masao 
Published: July 2004

Abstract
Electrochemical carboxylation of alkyl-substituted vinyl bromides (1a-1g) in the presence of 20 mol% of NiBr2•bpy under an atmospheric pressure of carbon dioxide with a platinum cathode and a magnesium anode gave the corresponding α,β-unsaturated carboxylic acids (2a-2g) in yields of 53-82%.
Dimanganese Complexes Bridged with a (μ-X)(μ-Carboxylato) Unit as Models for the Active Site of Manganese Catalase (X = OH, O or (O)2)
Authors: Osawa Masahisa , Fujisawa Kiyoshi , Kitajima Nobumasa , Moro-oka Yoshihiko 
Published: July 2004

Abstract
A novel dimanganese complex LMnII(OH)(OAc)MnIIL (1) (L = hydrotris(3,5-diisopropyl-1-pyrazolyl)borate) was synthesized by the reaction of LMnII(OH)2MnIIL with 1 equiv of acetic acid. Complex 1 was oxidized either by dioxygen or anaerobic reaction with H2O2, resulting in the formation of two isolable products [LMnIII(O)(OAc)MnIIIL]+(2) and LMnIII(O)2(OAc)MnIVL(3). The formation of 2 was identified by comparison with an authentic sample prepared from bis(μ-oxo) complex LMnIII(O)2MnIIIL. The structure of the 3 was determined by X-ray crystallography.
Synthesis, Structure, and Electrochemical Properties of New “Unsymmetrical” Metal Dithiolate Complexes
Authors: Kato Reizo , Kashimura Yoshiaki , Sawa Hiroshi , Okano Yoshinori 
Published: July 2004

Abstract
New “unsymmetrical” (mixed ligand) metal dithiolate complexes, expected as components of molecular conductors, have been obtained by a ligand-exchange reaction in refluxing acetone, followed by isolation with a preparative HPLC (ODP; acetonitrile-H2O). Their electrochemical data suggest that the acceptor (donor) ability and the on-site Coulomb energy for the “unsymmetrical” complexes can be tuned by a combination of ligands.