bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fixation of Carbon Dioxide to Carbon by Catalytic Reduction over Metal Oxides
Authors: Ishihara Tatsumi , Fujita Takanori , Mizuhara Yukako , Takita Yusaku 
Published: April 2006

Abstract
The catalytic reduction of CO2 to carbon with hydrogen was studied on the oxide catalysts for the fixation of carbon dioxide. Carbon dioxide was reduced to carbon and carbon monoxide selectively on the oxide catalysts. The catalyst, WO3, is highly active for reducing carbon dioxide to carbon.
Electrochemical Wacker Type Reaction with a Double Mediatory System Consisting of Palladium Complex and Tri(4-bromophenyl)amine
Authors: Inokuchi Tsutomu , Ping Liu , Hamaue Fumihiro , Izawa Miyoko , Torii Sigeru 
Published: April 2006

Abstract
The electrochemical Wacker type oxidation of terminal olefins by using palladium chloride or palladium acetate and tri(4-bromophenyl)amine as a recyclable mediator in either a divided cell or an undivided cell afforded the corressponding methyl ketones in good yields.
Fluorescence Excitation Spectra and Quantum Yield in Vacuum Ultraviolet Photodissociation of CF3CN
Authors: Che Dock-Chil , Kasai Toshio , Ohoyama Hiroshi , Kuwata Keiji , Kono Mitsuhiko , Tabayashi Kiyohiko , Shobatake Kosuke 
Published: April 2006

Abstract
The fluorescence excitation spectra of CN(A,B → X) and CF3(2A′1 → 1A″2) and the quantum yield for the CN(B) radical formation were measured in the photodissociation of CF3CN in 105–135 nm. The quantum yield for the CN(B) radical formation was found to be only a few percent. The similarity in the excitation energy dependence of CN(B → X) and of CN(A → X) indicated a common dissociation mechanism via the 3s Rydberg state of CF3CN for both states.
Synthesis of Ether-linked Disaccharide and Trisaccharide Derivatives of the Type (3-5)-d-Xylan
Authors: Martin Patrick , Conan Jacques Yves , Harmouch Benali , Postel Denis , Ronco Gino , Rouch Claude , Villa Pierre 
Published: April 2006

Abstract
We have synthesized a series of non-glycosidically linked di- and trisaccharide monoethers of the type (3-5)-d-xylan, by a one-pot reaction between the alcohol ROH and 3,5-anhydro-l,2-O-isopropylidene-α-d-xylofuranose, in the presence of KOH and toluene-DMSO at 80 °C.
Photolysis of trans(t-N,S)-[Co{S(O)2CH2COO-S,O}(tren)]+ (t-N = tertiary amine nitrogen; tren = tris(2-aminoethyl)amine). Linkage and Geometrical Isomerization
Authors: Akhter Farooque MD , Kojima Masaaki , Yoshii Toshihito , Kashino Setsuo , Yoshikawa Yuzo 
Published: April 2006

Abstract
On photolysis of trans(t-N,S)-[Co{S(O)2CH2COO-S,O}(tren)]+ with visible light, both linkage isomerization (sulfinato-S to sulfinato-O) and geometrical isomerization (trans to cis) took place to yield cis(t-N,O(S))- and trans(t-N,O(S))-[Co{OS(O)CH2COO-O,O}(tren)]+ (O(S) = oxygen of sulfinate group).
Photocontrol of Micellar Structure of an Azobenzene Containing Amphiphilic Sequential Polypeptide
Authors: Higuchi Masahiro , Minoura Norihiko , Kinoshita Takatoshi 
Published: April 2006

Abstract
Photo-induced structural changes were observed for an aggregate composed of amphiphilic sequential polypeptides with an azobenzene moiety in the main chain. The polypeptides associated with each other and formed micelle in aqueous solution in the dark. Photo-isomerization of the azobenzene moiety of the polypeptides induced a deaggregation of the micelle, via the bending structure formation of the polypeptide at the azobenzene moiety.
Effects of the Oxide/Metal Exposed Interface on Hydrogen Permeabilities of V2O5/Cu Multilayered Films
Authors: Shirai Hiroo , Tanaka Hidenori , Sakaguchi Hiroki , Adachi Gin-ya 
Published: April 2006

Abstract
Hydrogen permeabilities of V2O5/Cu multilayered films having various lengths of the perimeter of the V2O5/Cu interface were investigated. Although the hydrogen permeability of the multilayered film increased with the length of the perimeter, it increased only slowly when the length of the perimeter exceeded 9.6 × 10−2 m since the hydrogen concentration of the V2O5 layer is saturated at the region near the V2O5/Cu interface.
Selective Permeation of Carbon Dioxide through Synthetic Polymeric Membranes Having Amine Moiety
Authors: Yoshikawa Masakazu , Fujimoto Kiyoshi , Kinugawa Hirokazu , Kitao Toshio , Ogata Naoya 
Published: April 2006

Abstract
Permeation of CO2 was investigated by using synthetic polymeric membranes having a tertiary amine moiety, 2-(N,N-dimethyl)aminoethoxycarbonyl group. Permselectivity of the present membranes for CO2 was achieved. Through the DMAEMA/AN-199 membrane, separation factor towards CO2 for CO2/N2 separation ranged from 60 to 90.
Pyrimidines as Ferromagnetic Exchange Couplers in Dinuclear Oxovanadium(IV) Complexes
Authors: Mitsubori Shin-ichi , Ishida Takayuki , Nogami Takashi , Iwamura Hiizu 
Published: April 2006

Abstract
The intramolecular magnetic interactions between 1/2 spins of two oxovanadium(IV) ions were studied in the complexes L[VO(hfac)2]2 (hfac = hexafluoroacetylacetonate, L = 4-methyl-, 4,6-dimethyl-, 4-amino- and unsubstitute-pyrimidines, and quinazoline). The magnetic measurements revealed that the vanadium spins were ferromagnetically coupled through the pyrimidine bridges with J/kB = 1.1–2.7 K. The intermolecular ferromagnetic interaction was found in the case of L = pyrimidine.
Preparation of Bridgehead Substituted Bicyclo[3.3.0]octane Derivatives by the BF3·OEt2-Catalyzed Rearrangement of Bicyclo[3.2.1]oct-6-en-8-ols
Authors: Hayashi Yujiro , Ushio Hiroyuki , Narasaka Koichi 
Published: April 2006

Abstract
6-t-Butyldimethylsilyl-7-methylthiobicyclo[3.2.1]oct-6-en-8-ol derivatives prepared from the [2+2] cycloadducts of 1-t-butyldimethylsilyl-2-methylthioacetylene and 2-cyclohexenones are rearranged by the treatment with BF3·OEt2 into two types of bicyclo[3.3.0]octane compounds, bicyclo[3.3.0]oct-3-en-2-one or 2-methylenebicyclo[3.3.0]oct-3-ene derivatives selectively, depending on the substituent at C-1 position.
In Situ Formation Process of LiCoO2 in the Molten Lithium-Potassium Carbonate Eutectic at 923 K
Authors: Yamada Kohta , Uchida Isamu 
Published: April 2006

Abstract
The spontaneous oxidation of Co metal in a molten (62Li + 38K)mol% carbonate mixture with an oxygen partial pressure has been characterized at 923 K. When a thin Co film electroplated on a gold substrate was immersed into the melt, the open circuit potential (OCP) decayed gradually, indicating well-defined, three potential plateaus, and the oxide films produced at each potential plateau were identified by X-ray diffraction. The surface products at the first and second plateaus were CoIIO, but the film impedance decreased rapidly at the second plateau, suggesting the formation of the lithiated CoIIO. It was found that LiCoIIIO2 was formed at the third OCP plateau (ca. −0.4 V vs.(1 : 2)O2/CO2 reference electrode) and OCP reached to the Nernst potential of oxygen electrode reaction after the completion of LiCoO2 formation.
Induced Assembly of Aromatic Rings Caused by a CH···π Interaction
Authors: Jitsukawa Koichiro , Iwai Kouji , Masuda Hideki , Ogoshi Hisanobu , Einaga Hisahiko 
Published: April 2006

Abstract
The bis-(N-pyridoxy-l-phenylalaninato)cobalt(III) complex exhibiting an anomalous assembly of aromatic rings around the pyridoxy 2′-methyl group has been synthesized and characterized by 1H-NMR spectroscopy and X-ray analysis. The 1H-NMR spectrum of the complex in D2O, methanol-d4 and dimethylsulfoxide-d6 revealed peculiar upfield shift in 2′-methyl group. The detailed examination of the crystal structure demonstrated that the two C–H bond vectors of 2′-methyl group were directed toward the planes of the pyridoxy pyridine and phenylalanyl benzene rings, respectively. These findings indicate the induced assembly of aromatic rings through a CH···π interaction.
Remarkable Enhancement of 7-Ethoxycoumarin O-Deethylation by Lys250, Arg251 and Lys253 Mutations of Cytochrome P450 1A2
Authors: Sato Hideaki , Shimizu Toru , Murakami Yoshinori , Hatano Masahiro 
Published: April 2006

Abstract
Catalytic efficiency, kcat/Km, for 7-ethoxycoumarin O-deethylation was remarkably enhanced up to 6-fold by mutations at Lys250, Arg251 or Lys253 in cytochrome P450 1A2, while that for methanol hydroxylation was not changed by the same mutations. It is thus suggested that this ionic site is located at or near one of the hydrophobic substrate-interacting sites of this enzyme.
New Linear-Type Tetranuclear Complex, [{Cp*Rh(μ-SMe)3Mo(O)2}2(μ-O)] (Cp* = η5-C5Me5)
Authors: Xi Rimo , Wang Bateer , Ozawa Yoshiki , Abe Masaaki , Isobe Kiyoshi 
Published: April 2006

Abstract
A mixed metal tetranuclear complex with two MoVI(μ-SMe)3RhIII groups, [{Cp*Rh(μ-SMe)3Mo(O)2}2(μ-O)] has been obtained from the reaction of the triple-cubane type oxide cluster [(Cp*Rh)4Mo4O16] with MeSH. The complex has been characterized by X-ray analysis and variable-temperature 1H NMR spectroscopy. The latter has revealed that the complex exists as a mixture of isomers which show interconversion due to the inversion at the pyramidal sulfur center.
A Selective Synthesis of 3,5-Diphenyl-1,2,4-Oxadiazole by a Reaction of Bezylcobaloxime with Alkyl Nitrite
Authors: Kijima Masashi , Nakazato Katsuhiko , Sato Takeo 
Published: April 2006

Abstract
Benzyl ligand of Benzylbis(dimethylglyoximato)pyridine cobalt complexe was selectively converted to 3,5-diphenyl-1,2,4-oxadiazole by a reaction with alkyl nitrite under irradiation of visible light. The reaction proceeds via an in situ formation of an oxime and a nitrile oxide.
Partition Characteristics of Metal(II, III) Acetylacetonates between Sodium Dodecyl Sulfate Micelles and Water
Authors: Katsuta Shoichi , Saitoh Koichi 
Published: April 2006

Abstract
Partition coefficients of neutral acetylacetonates of Cr(III), Co(III), Rh(III), and Pd(II) between sodium dodecyl sulfate micelles and water were measured by micellar electrokinetic chromatography. The partition coefficients were much larger than those obtained between heptane and water. It was explained in terms of hydration of the complexes in the micellar phase.
Nucleophilic Substitution Reaction of Aromatic Chlorides with Cyclic Tertiary Amines under High Pressure
Authors: Ibata Toshikazu , Shang Muhong , Demura Tetsuo 
Published: April 2006

Abstract
The reaction of p-chloronitrobenzene with N-methylpyrrolidine under high pressure gave demethylation product and ring opening products through quaternary ammonium chloride intermediate formed by the SNAr reaction. On the other hand, the reactions with N-methylpiperidine and N-methylmorpholine gave only demethylation products. The reactions of o-chloronitrobenzene and 2,4-dichloronitrobenzene with above amines gave similar results.
A Novel and Efficient Generation of Functionalized Vinylcopper Reagents and their Reactions with Electrophiles. Synthesis of β-Methylthiobutenolides
Authors: Hojo Makoto , Harada Hajime , Hosomi Akira 
Published: April 2006

Abstract
Ketene dithioacetals bearing an alkoxycarbonyl group at 2-position are effectively reduced by two equimolar amounts of dimethylcuprate derived from methyllithium and cuprous cyanide to yield the corresponding functionalized vinylcopper species. These organocopper species are efficiently trapped by carbon electrophiles. Formal substitution reactions of a methylthio group in ketene dithioacetals by electrophiles can be attained by one-pot operation. Synthesis of β-thiobutenolides was also achieved.
Thermal Rearrangement of 1-Alkenyl-2-(2′,2′-diphenylethenylidene)cyclopropanes to 4-(2′,2′-Diphenylethenylidene)cyclopent-1-enes
Authors: Mizuno Kazuhiko , Sugita Hikaru , Kamada Tadashi , Otsuji Yoshio 
Published: April 2006

Abstract
1-Alkenyl-2-(2′,2′-diphenylethenylidene)cyclopropanes thermally rearranged to 4-(diphenylethenylidene)cyclopent-1-enes at relatively low temperature (≤373 K). Measurement of activation parameters revealed that the reactivity and mode of the reaction largely depend on structures of starting materials and products.
New Type of π-Conjugated Polymers Constituted of Quinone Units in the Main Chain
Authors: Etori Hideki , Kanbara Takaki , Yamamoto Takakazu 
Published: April 2006

Abstract
New π-conjugated polymers having quinone units as the recurring units, e.g., poly(2-methyl-9,10-anthraquinone-1,4-diyl) P(Me-1,4-AQ) with molecular weight of 56000, have been prepared by dehalogenation polycondensation of dichloroquinones. P(Me-1,4-AQ) exhibits unique redox behaviors due to electronic interactions between the multiple redox centers in the polymer through the π-conjugated system.
Studies on the Meerwein Arylation-Based Preparation of 2,3-Diarylbenzene-1,4-diones and Its Theoretical Interpretation
Authors: Takahashi Ichiro , Muramatsu Osamu , Fukuhara Jun , Hosokawa Yoshinao , Takeyama Naohiko , Morita Toshio , Kitajima Hidehiko 
Published: April 2006

Abstract
Title compounds possessing a variety of substituents are systematically prepared by means of Meerwein arylation of benzene-1,4-dione. Synthetic aspects and their MNDO calculation-based interpretation are described.
Formation and Photochemical and Thermal Reactions of Adduct between 1,2,5,3-Cobaltadithiazole and Dimethyl Acetylenedicarboxylate
Authors: Kajitani Masatsugu , Hisamatsu Naoki , Takehara Masahiro , Mori Yoshiko , Sugiyama Toru , Akiyama Takeo , Sugimori Akira 
Published: April 2006

Abstract
(η5-Cyclopentadienyl or η5-pentamethylcyclopentadienyl)(1-phenylmethanimine-N,1-dithiolato)cobalt(III) (1) reacts with dimethyl acetylenedicarboxylate (DMAD) to give the adducts in which Co and S of the 1,2,5,3-cobaltadithiazole ring in the cobalt complex are bridged by 1,2-dimethoxycarbonylethylene-1,2-diyl groups (3a: the complex having Cp and 3b: the complex having Cp*). The sulfur atom adjacent to N is preferentially reacted. Photolysis of 3 gives 3,4-dimethoxycarbonyl-1,2,5-cobaltadithiolene (4) with the elimination of benzonitrile. In thermolysis in benzene, 3a undergoes selectively the elimination of benzonitrile to give 4a, while 3b undergoes the elimination of either DMAD or benzonitrile to give 1 or 4.
Chiral Discrimination in the Interactions between [Co(en)3]3+ and Cholesteric Liquid Crystals by 59Co NMR Spectroscopy
Authors: Iida Masayasu , Mizuno Yuri , Koine Norio 
Published: April 2006

Abstract
Chiral discrimination of [Co(en)3]3+ was investigated by using 59Co NMR spectroscopy in liquid crystals comprising cesium N-dodecanoyl-l-(or d)-alaninate. The 59Co quadrupole splitting was distinguishable by diastereomeric interactions while a change in the chemical shift was the same.
N,N,N′,N′-Tetramethylazodicarboxamide (TMAD), A New Versatile Reagent for Mitsunobu Reaction. Its Application to Synthesis of Secondary Amines
Authors: Tsunoda Tetsuto , Otsuka Junko , Yamamiya Yoshiko , Itô Shô 
Published: April 2006

Abstract
N,N,N′,N′-Tetramethylazodicarboxamide, TMAD, was found to be more versatile in the Mitsunobu reaction than traditional diethyl azodicarboxylate or recently developed 1,1′-(azodicarbonyl)dipiperidine, when used in combination with tributylphosphine in benzene. The usefulness of the reagent was demonstrated by the highly efficient two-step synthesis of benzylcrotylamine from N-benzyltrifluoroacetamide.
A Stereoselective Synthesis of (−)-Isoiridomyrmecin. Application of the Asymmetric Aza-Claisen Rearrangement
Authors: Tsunoda Tetsuto , Tatsuki Shinji , Kataoka Kazuko , Itô Shô 
Published: April 2006

Abstract
(−)-Isoiridomyrmecin was synthesized stereoselectively in 6 steps starting from 1-hydroxymethyl-5-methylcyclopentene and utilizing tlle asymmetric aza-Claisen rearrangement as a key step.
Fullerene Aziridine. Facile Synthesis and Spectral Characterization of Fullerene Urethane, C60NCO2CH2CH3
Authors: Ishida Takayuki , Tanaka Kenjiro , Nogami Takashi 
Published: April 2006

Abstract
A fullerene urethane, C60NCO2CH2CH3, was obtained by a one-pot reaction from C60, NaN3, ClCO2CH2CH3, and 15-crown-5 ether in refluxing toluene. The structure of the product was spectroscopically determined as a closed aziridine at a 6/6-ring junction.
Determination of 1,2-dichlorotetrafluoroethane (CFC-114) Concentration in the Atmosphere
Authors: Chen Limin , Makide Yoshihiro , Tominaga Takeshi 
Published: April 2006

Abstract
Atmospheric concentration of 1,2-dichlorotetrafluoroethane (CFC-114) was determined accurately by the complete separation of its isomer 1,1-dichlorotetrafluoroethane (CFC-114a). The trends of atmospheric CFC-114 concentrations since 1986 were observed in Hokkaido, Japan (40–45 °N), and Syowa Station, Antarctica (69 °S). The atmospheric CFC-114 concentration in the mid-latitude Northern Hemisphere increased by 0.75 pptv / year over the period 1986–1990, and 0.6 pptv / year over 1990–1993. Vertical distribution of CFC-114 was also obtained up to mid-stratosphere.
Anomalous Behavior of Triplet-Excited Zinc(II) Tetraphenylporphyrin Moieties Compartmentalized in the Hydrophobic Cluster of Pendant Cyclododecyl Groups in an Amphiphilic Polyelectrolyte
Authors: Morishima Yotaro , Saegusa Kazunori , Kamachi Mikiharu 
Published: April 2006

Abstract
A small quantity of zinc(II) tetraphenylporphyrin (ZnTPP) moieites were covalently incorporated into an amphiphilic copolymer of sodium 2-acrylamido-2-methylpropanesulfonate and N-cyclododecylmethacrylamide. The ZnTPP moieties were compartmentalized in the hydrophobic cluster of the cyclododecyl pendants in the polymer in aqueous solution, and showed a unusual blue-shifted phosphorescence due to a high energy triplet-excited (T1) state. The lifetime of the high energy T1 state was extraordinarily long: ca. 56 ms at 20 °C in aqueous solution.
Synthesis of Pyridine Bases over Ion-exchanged Pentasil Zeolite
Authors: Sato Hiroshi , Shimizu Shinkichi , Abe Nobuyuki , Hirose Ken-ichi 
Published: April 2006

Abstract
The catalytic activity of pentasil zeolite for the synthesis of pyridine bases from aldehydes and ammonia was found to depend upon the Si/Al ratio and the metal cation. The best choices are 30 to 120 of Si/Al ratios and metal cations such as Tl(I), Pb(II), Co(II) and Zn(II).
Detection and Characterization of Biological Compounds in Human Sweat Adsorbed on Alumina by Inelastic Electron Tunneling Spectroscopy
Authors: Higo Morihide , Kamata Satsuo 
Published: April 2006

Abstract
Vibrational spectra of compounds in sweat adsorbed on alumina have been measured by inelastic electron tunneling spectroscopy. Analysis of the tunneling spectra showed that lactic acid and fatty acids are selectively detected from separated aqueous and benzene solutions, respectively.
The Stabilization of Dioxomolybdenum(VI) Dithiolene Complex by the Electron Withdrawing Substituent on the Dithiolene Ligand: Comparison of Reactivities of Monooxomolybdenum(IV) Complex with R2S2C2 (R = –CN and –COOMe) Ligands as Models of Molybdenum Oxidoreductases
Authors: Oku Hiroyuki , Ueyama Norikazu , Nakamura Akira , Kai Yasushi , Kanehisa Nobuko 
Published: April 2006

Abstract
In the reaction between Me3NO and [MoIVO(mnt)2]2− (mnt = 1,2-Dicyanoethylene-1,2-dithiolate) in DMF, the oxidized complex, [MoVIO2(mnt)2]2− was isolated. On the contrary, in the case of the reaction of [MoIVO(S2C2(COOMe)2)2]2−, the formation of the corresponding (MoVIO2)2+ complex was observed in the UV/vis spectra. Our model study suggest that the electron withdrawing effect by the substituent on dithiolene ligand modulates the reactivity of Mo=O group in the (MoVIO2)2+ state.
Ytterbium Metal Mediated Desulfurization and Coupling Reaction of Diaryl Thioketones
Authors: Makioka Yoshikazu , Uebori Shin-ya , Tsuno Masumi , Taniguchi Yuki , Takaki Ken , Fujiwara Yuzo 
Published: April 2006

Abstract
Diaryl thioketones are selectively reduced with ytterbium metal to diarylmethanethiols, diarylmethanes or tetraarylethylenes, via thiometallacycle intermediates which undergo electrophilic coupling at thiocarbonyl carbon and sulfur.
Three-center Selenium Interaction in Electrochemical Oxidation of a Linear Trisselenide, 2,6-Bis(phenylselenomethyl)phenyl Phenyl Selenide, and Se-Monooxygenation from Hydrolysis of Its Sulfuric Acid Solution
Authors: Fujihara Hisashi , Higuchi Yasuhiro , Mima Hisatomo , Furukawa Naomichi 
Published: April 2006

Abstract
The cyclic voltammogram of a new trisselenide, 2,6-bis(phenylselenomethyl)phenyl phenyl selenide (1), showed the reversible electrochemical oxidation with low oxidation potential which is attributed to the three-center selenium participation. The monoselenoxide of 1 was formed in the hydrolysis of concd H2SO4 solution of 1, while the MCPBA oxidation of 1 gave a mixture of the corresponding mono- and bis-selenoxides.
Stereoselective Construction of Tetrahydrofuran by Tin (IV) Chloride Promoted [3+2] Cycloaddition of Allylsilane to α-Keto Ester
Authors: Akiyama Takahiko , Ishikawa Keiichiro , Ozaki Shoichiro 
Published: April 2006

Abstract
SnCl4 promoted [3+2] cycloaddition reactions of allylsilane to α-keto esters afforded tri- and tetrasubstituted tetrahydrofurans with excellent stereoselectivity via 1,2-silyl migration in good yields.
Facile Isomerization of Trimethylsilyl Ketene Acetals to α-Trimethylsilyl Esters Catalyzed by Lanthanoid Trifluoromethanesulfonates
Authors: Makioka Yoshikazu , Taniguchi Yuki , Takaki Ken , Fujiwara Yuzo 
Published: April 2006

Abstract
Migration of trimethylsilyl group from oxygen to α-carbon in silyl ketene acetals is effectively catalyzed by lanthanoid triflates under mild conditions. Scope and limitation of this rearrangement are presented.
Photocatalytic Activities for Carbon Dioxide Reduction of TiO2 Microcrystals Prepared in SiO2 Matrices Using a Sol–Gel Method
Authors: Inoue Hiroshi , Matsuyama Takehiko , Liu Bi-Jin , Sakata Takao , Mori Hirotaro , Yoneyama Hiroshi 
Published: April 2006

Abstract
The size of TiO2 microcrystals embedded in SiO2 matrices, which were prepared using a mixed sol of TiO2 and SiO2 in ethanol, decreased with a decrease of the mole ratio of TiO2 to SiO2 in the sol. The prepared TiO2 microcrystals showed activities for photoreduction of CO2 to formate, methane and ethylene, and the quantum efficiencies for the production of these were increased with decreasing the size of the TiO2 microcrystals.
Formation and Reaction of Azomethine Ylide by the Reaction of Cu(acac)2- ketocarbenoids with 1,1-Diphenylmethanimine
Authors: Ibata Toshikazu , Singh Girija Shankar 
Published: April 2006

Abstract
The reaction of α-diazocarbonyl compounds with 1,1-diphenylmethanimine in the presence of Cu(acac)2 afforded the corresponding N-substituted imines in general together with pyrrolidine and 1,4,6-dioxazocine derivatives (in the reaction of α diazo-4-chloroacetophenone) and 1,1-diphenyl-2-(4-nitrobenzoyl) ethylene (in the reaction of α-diazo-4-nitroacetophenone) through azomethine ylides.
Bioactive Polyacetylenes from the Marine Sponge Petrosia sp.
Authors: Ochi Masamitsu , Ariki Saori , Tatsukawa Akira , Kotsuki Hiyoshizo , Fukuyama Yoshiyasu , Shibata Kozo 
Published: April 2006

Abstract
Four new bioactive polyacetylenes have been isolated from the marine sponge Petrosia sp. Their structures including absolute stereochemistry have been elucidated by spectral and chemical methods.
Chemoenzymatic Enantioselective Synthesis of Amidinomycin
Authors: Chênevert Robert , Lavoie Michèle , Courchesne Gabriel , Martin Richard 
Published: April 2006

Abstract
We report the first asymmetric synthesis of amidinomycin, an antiviral antibiotic metabolite. Amidinomycin of high enantiomeric purity (ee 91%) was prepared from norbornylene in 8 steps. The key step is an enzymatic discrimination of enantiotopic groups in meso cis-1,3-dicarbomethoxycyclopentane or in meso cis-cyclopentane-1,3- dicarboxylic acid anhydride.