bluuebunny/crossref_metadata_2025_split huggingface dataset:
THE SMILES REARRANGEMENT OF 4-NITROPHENYL N-HYDROXYCARBAMATE: THE INVOLVEMENT OF A SPIRO MEISENHEIMER COMPLEX OF AMONONITROBENZENE DERIVATIVE AS A TRANSIENT REACTION INTERMEDIATE
Authors: Fitzgerald Leonard R , Blakeley Robert L , Zerner Burt 
Published: July 2006

Abstract
In alkaline solution, 4-nitrophenyl N-hydroxycarbamate undergoes reaction by elimination to yield 4-nitrophenoxide ion, and by rearrangement to yield N-carboxy-4-nitrophenoxyamine. The effect of pH on the yield of the rearrangement product establishes that a transient spiro Meisenheimer complex is formed reversibly. Aromatization of this species occurs by two competing pH-independent reactions: one involves expulsion of a hydroxamate ion; the other involves the formation of a carbamate ion via a general base catalyzed collapse of the complex.
REGIOSELECTIVE SYNTHESIS OF 2,6-DICHLOROQUINOXALINE AND 2-CHLORO-6-IODOQUINOXALINE
Authors: Sakata Gozyo , Makino Kenzi 
Published: July 2006

Abstract
Facile regioselective synthesis of 2,6-dichloroquinoxaline and 2-chloro-6-iodoquinoxaline is described. Electrophilic substitution reaction of 2(1H)-quinoxalinone with chloride and iodide ion in 95% sulfuric acid occurred at 6-position exclusively.
SURFACE ENHANCED RAMAN SCATTERING SPECTRA OF 2,2′-BIPYRIDINE ADSORBED ON AN Ag ELECTRODE FROM ITS KCl SOLUTION
Authors: Kim Munsok , Itoh Koichi 
Published: July 2006

Abstract
The surface enhanced Raman scattering (SERS) study indicates that 2,2′-bipyridine (bpy) molecules adsorb to an Ag electrode surface taking a nearly planar cis conformation. The potential-dependence of the interaction between the adsorbates and the Ag electrode was elucidated from the analysis of the spectra.
A STEREOSELECTIVE SYNTHESIS OF N-BENZOYL l-DAUNOSAMINE
Authors: Hiyama Tamejiro , Nishide Kiyoharu , Kobayashi Kazuhiro 
Published: July 2006

Abstract
Reaction of (2S,3S)-2,3-(cyclohexylidenedioxy)butanenitrile, derived from L(+)-tartrate or (S)-lactate, with the magnesium enolate of t-butyl acetate gave the corresponding (Z)-β-amino acrylate derivative, which was in turn transformed into N benzoyl l-daunosamine by acetylation, stereoselective hydrogenation, acidic hydrolysis, benzoylation, lactonization, and finally by reduction.
SYNTHESIS AND COMPLEXING PROPERTIES OF NOVEL FERROCENE CROWN ETHERS
Authors: Czech Bronislaw , Czech Anna , Kang Sang Ihn , Bartsch Richard A 
Published: July 2006

Abstract
Two novel ferrocene crown compounds in which the ferrocene nucleus bears one and two 18-crown-6 units are synthesized and their alkali metal cation complexation is examined in solvent extraction. The ferrocene biscrown exhibits selectivity for K+ and Rb+ in competitive extraction.
FORMATION OF AROMATIC HYDROCARBONS IN DEGRADATION OF POLYETHYLENE OVER ACTIVATED CARBON CATALYST
Authors: Uemichi Yoshio , Kashiwaya Yasunori , Ayame Akimi , Kanoh Hisao 
Published: July 2006

Abstract
Catalytic effects of activated carbon on the degradation of polyethylene were investigated. Activated carbon was highly effective for the formation of normal alkanes (C1–C5 fractions) and aromatics (C6–C8). Experimental results were explained in terms of high cracking and cyclization activities of the catalyst.
SYNTHESIS OF NEW MACROCYCLIC POLYETHER DI- OR TETRAESTER LIGANDS CONTAINING PYRAZOLE UNITS
Authors: Elguero J , Navarro P , Franco M I Rodriguez 
Published: July 2006

Abstract
A new series of macrocyclic polyether–diester compounds containing one or two pyrazole rings (NH or N-methyl substituted) have been prepared by treating 3,5-pyrazolyldicarbonyl chlorides with tetraethylene glycol in the presence of triethylamine. Their complexation abilities towards the shift reagent Eu(Fod)3 have been studied by 1H NMR in Cl3CD solution.
RESONANCE RAMAN SPECTRUM OF BIS[TRIS(TRIMETHYLSILYL)METHYL]DIPHOSPHENE
Authors: Hamaguchi Hiro-o , Tasumi Mitsuo , Yoshifuji Masaaki , Hashida Takashi , Inamoto Naoki 
Published: July 2006

Abstract
The resonance Raman spectrum of bis[tris(trimethylsilyl)methyl]diphosphene has been obtained using an ultraviolet laser line at 351.1 nm. From the observed overtone progression of the P=P stretching vibration, the harmonic frequency ωe and the anharmonic constant ωexe have been determined as 595 and 2 cm−1, respectively.
STEPWISE SEQUENCE OF DOUBLE DIELS–ALDER REACTION OF CROSS-CONJUGATED TRIENE EQUIVALENT
Authors: Tsuge Otohiko , Wada Eiji , Kanemasa Shuji , Sakoh Hirohiko 
Published: July 2006

Abstract
Alcohols with a 2-(1,3-butadienyl) substituent are readily available from the Grignard reaction of chloroprene and are important as cross-conjugated triene equivalents. Some examples of double Diels–Alder reaction of the alcohols are first reported.
ASYMMETRIC ACYLATION OF meso-1,2-DIOLS WITH d-KETOPINIC ACID CHLORIDE
Authors: Mukaiyama Teruaki , Tomioka Isao , Shimizu Makoto 
Published: July 2006

Abstract
Highly selective asymmetric acylation of meso-1,2-diols has been achieved using d-ketopinic acid chloride as acylating reagent.
ELECTROCHEMICAL ENANTIOMER-DIFFERENTIATING OXIDATION OF A RACEMIC ALCOHOL ON POLY(l-VALINE)-COATED ELECTRODES
Authors: Komori Tetsuo , Nonaka Tsutomu 
Published: July 2006

Abstract
It was found that the enantiomer-differentiating oxidation of racemic 2,2-dimethyl-1-phenyl-1-propanol (1) to the corresponding ketone (2) occurred on poly(l-valine)-coated electrodes. This reaction seemed to be the first example of electrochemical enantiomer-differentiating reaction and to be available for kinetic optical resolution: 43% optically-pure S-(−)-1 was recovered as an unreacted part, when a half amount of starting 1 was converted using a lead dioxide anode coated doubly with polypyrrole and poly(l-valine).
2-(TRIFLUOROMETHYL)ALLYLTRIMETHYLSILANE. A USEFUL BUILDING BLOCK FOR TRIFLUOROMETHYLATED ORGANIC MOLECULES
Authors: Yamazaki Takashi , Ishikawa Nobuo 
Published: July 2006

Abstract
2-(trifluoromethyl)allyltrimethylsilane, a new building block for the introduction of trifluoromethyl group was prepared by the Grignard reaction of ethyl trifluoroacetate with (trimethylsilyl)methylmagnesium chloride. This allylsilane underwent the reaction with aldehydes and ketones to give the adducts in good yields.
AN ELECTROCHEMICAL METHOD SPECIFICALLY DIRECTED TO THE PREPARATION OF Dl-BISABOLOL FROM Dl-NEROLIDOL
Authors: Uneyama Kenji , Masatsugu Yosinori , Ueda Takesi , Torii Sigeru 
Published: July 2006

Abstract
A product-selective electrosynthesis of dl-bisabolol from dl-nerolidol was accomplished by a constant current electrolysis in commercial acetone containing a small amount of LiClO4.
CYCLODIMERIZATION OF DIMETHYLMETHYLENESUCCINATE BY ALKYLALUMINUM COMPOUNDS
Authors: Yamaguchi Kazumi , Yokota Kazuaki , Takada Yoshiyuki 
Published: July 2006

Abstract
Cyclopentanone and bicyclic lactone derivatives have been prepared selectively by the reactions of dimethyl methylenesuccinate with alkylaluminum compounds. This reaction provides a new method for the preparation of lactones and cyclic ketones.
SYNTHESES, CHARACTERIZATIONS, AND KINETIC ASPECTS OF THIOCYANATO AND ISOTHIOCYANATO LINKAGE ISOMERS OF COBALT(III) COMPLEXES LIGATING AMINOPOLYCARBOXYLATES
Authors: Ogino Hiroshi , Isago Hiroaki 
Published: July 2006

Abstract
Two pairs of linkage isomers ([Co(SCN)(edta)]2− and [Co(NCS)(edta)]2−; [Co(SCN) (hedtra)]− and [Co(NCS) (hedtra)]−) were prepared. Where edta4− and hedtra3− denote ethylenediaminetetraacetate and N-hydroxyethylethylenediaminetriacetate, respectively. In aqueous solutions at room temperature, the N-bonded isomers were stable, while the S-bonded isomers were unstable : [Co(SCN)(edta)]2− gave [Co(edta)]−. [Co(SCN)(hedtra)]− gave both [Co(H2O)(hedtra)] and [Co(NCS)(hedtra)]−.
CORRELATIONS BETWEEN DISSOLVED ALKALINE PHOSPHATASE AND ORTHOPHOSPHATE IN LAKE WATER
Authors: Kobayashi Kensei , Hashimoto Shinya , Fujiwara Kitao , Haraguchi Hiroki , Fuwa Keiichiro , Otsuki Akira 
Published: July 2006

Abstract
Distinct negative correlation was found between the dissolved alkaline phosphatase activity and the orthophosphate concentration in Lake Kasumigaura (surface area, 171 km2) in the phosphorus-limited season. The decrease of the alkaline phosphatase activity induced by orthophosphate ions was observed at the level of 1 ng/mL of phosphorus, which is 3 orders of magnitude smaller than that in the laboratory scale experiment.
PHOTO-INDUCED HYDROGEN EVOLUTION IN THE PRESENCE OF NADPH AS AN ELECTRON DONATING AGENT
Authors: Okura Ichiro , Aono Shigetoshi , Kita Tatsuya 
Published: July 2006

Abstract
The cation radical of methylviologen was formed when an aqueous solution containing photosensitizer, methylviologen (MV2+), and NADPH was irradiated by visible light. On the addition of hydrogenase to the photo-irradiation system hydrogen evolution was observed.
PRACTICAL SYNTHESIS OF (+)-9(O)-METHANO-Δ6(9α)-PGI1. THE HIGHLY POTENT CARBON ANALOG OF PROSTACYCLIN
Authors: Sodeoka Mikiko , Shibasaki Masakatsu 
Published: July 2006

Abstract
A practical synthesis of (+)-9(O)-methano-Δ6(9α)-PGI1 potentially a useful therapeutic agent, has been accomplished by utilizing the intramolecular aldol condensation as a key step followed by the Wittig reaction and the regioselective hydrogenation.
DIASTEREOSELECTIVE REDUCTION OF PERFLUQROALKYLATED α,β-UNSATURATED KETONES WITH BAKER’S YEAST
Authors: Kitazume Tomoya , Ishikawa Nobuo 
Published: July 2006

Abstract
The differentiation of a fluorinated group in the molecule with active fermenting yeast and the double asymmetric induction in some perfluoroalkylated α,β-unsaturated ketones are described.
PREPARATION AND REACTIONS OF DODECAMETHYL-3,4,7,8,11,12-HEXASILACYCLODODECA-1,5,9-TRIYNE
Authors: Sakurai Hideki , Eriyama Yuichi , Hosomi Akira , Nakadaira Yasuhiro , Kabuto Chizuko 
Published: July 2006

Abstract
Pyrolysis of the title silicon-containing cyclic triyne gave, by stepwise extrusion of dimethylsilylene, hexamethyltrisilacyclonona-1,4,7-triyne, which was further converted to a novel tris-bridged cyclophane. Fifteen-membered trioxahexasilatriyne, prepared by the oxidation of the title triyne, isomerized to the corresponding benzene derivative thermally.
THERMODYNAMIC PROPERTIES OF THE Nb–I SYSTEM
Authors: Hinode Hirohumi , Wakihara Masataka , Kamiya Shigeki , Saeki Masanobu , Taniguchi Masao 
Published: July 2006

Abstract
Equilibrium vapor pressures of Nb–I system were measured by using the Broudon’s gauge at temperatures between 293 and 1050 K. Considering the main gaseous species of the Nb–I system at high temperatures, the standard Gibbs’ energy functions, ΔG°=−21.0×103+10.1 T (T=850–1000 K), were calculated for the following reaction from both the partial pressures and material balance; Nb (s) + 2 I2 (g) \ightleftharpoons NbI4 (g).
HIGHLY SELECTIVE IONOPHORE FOR LITHIUM IONS. 14-CROWN-4 DERIVATIVE BEARING A LONG ALIPHATIC CHAIN
Authors: Kimura Keiichi , Kitazawa Sadaya , Shono Toshiyuki 
Published: July 2006

Abstract
The 14-crown-4 derivative, 3-dodecyl-3-methyl-1,5,8,12-tetraoxacyclotetradecane, has proved to be highly Li+-selective. In the ion-selective polymeric membrane electrode based on the crown ether was attained marked preference of Li+ over alkali and alkaline-earth metal ions, NH4+, and H+.
HIGH CATALYTIC ACTIVITIES OF SPECIALLY TREATED MgO and Na/MgO FOR DECOMPOSITION OF METHYL FORMATE
Authors: Ushikubo Takashi , Hattori Hideshi , Tanabe Kozo 
Published: July 2006

Abstract
The decomposition of methyl formate to methanol and carbon monoxide was carried out in gaseous phase at 50–300 °C over alkaline earth metal oxides, Na/MgO, Al2O3, SrO/Al2O3, K/active carbon, and 13X-molecular sieves. The MgO catalyst pretreated at 1000 °C exhibited a high activity, the selectivity being 100%. Addition of Na to MgO brought about a great increase in the activity, though a small amount of H2 formed.
A MICROBIAL SENSOR FOR URIC ACID
Authors: Kawashima Takuji , Tomida Kazuhiro , Tominaga Naotomo , Kobayashi Takekazu , Onishi Hiroshi 
Published: July 2006

Abstract
A microbial sensor for uric acid has been devised by coupling intact yeast cells (Pichia membranaefaciens 162300) with a carbon dioxide electrode. The resulting sensor has a markedly longer lifetime than the corresponding isolated enzyme sensor. The response slopes ranging from 37 to 42 mV per decade were obtained over the concentration range 1.0×10−4–2.5×10−3 mol dm−3 uric acid during the period 4–50 d.
SYNTHESIS OF OPTICALLY ACTIVE PROSTAGLANDIN ANALOGUE (8R,11S,12R,15S)-10-OXA-11-METHYL-11-DEOXY-PGE2
Authors: Nokami Junzo , Ono Toshio , Kajitani Yasunobu , Wakabayashi Shoji 
Published: July 2006

Abstract
The title compound has been synthesized via “three-component coupling process” which consisted of 1,4-addition of sulfonyl-carbanion to a butenolide and alkylation of the resulting enolate with propargylic iodide.
INSOLUBLE CATALYST FOR HEAT-GAIN IN A WATER-SOLUBLE SOLAR ENERGY STORAGE SYSTEM
Authors: Maruyama Kazuhiro , Tamiaki Hitoshi , Kawabata Shigeki 
Published: July 2006

Abstract
By action of insoluble catalysts, cobalt tetraphenylporphyrin or cobalt phthalocyanine adsorbed on activated carbon, water-soluble quadricyclane derivative was isomerized to norbornadiene derivative under release of heat in an alkaline solution. The activities of these insoluble catalysts were as high as those of water-soluble catalysts.
LASER-PHOTOLYSIS STUDY OF THE EXTERNAL MAGNETIC FIELD EFFECT ON THE DYNAMIC BEHAVIOR OF RADICAL PAIRS INVOLVING A GERMYL RADICAL
Authors: Hayashi Hisaharu , Sakaguchi Yoshio , Mochida Kunio 
Published: July 2006

Abstract
The yields of the escaping ketyl radicals from the radical pairs formed through the reactions of triethylgermane with the triplet states of acetophenone and xanthone were found to be increased by a magnetic field. The observed increases at 1 T were 3 and 27% for the ketyl radicals of acetophenone and xanthone, respectively.
PREPARATION PROCESS AND CATALYTIC ACTIVITY OF CsxH3−xPW12O40
Authors: Tatematsu Shin , Hibi Takuo , Okuhara Toshio , Misono Makoto 
Published: July 2006

Abstract
When H3PW12O40 solution was titrated with Cs2CO3 solution, Cs2PW12O40 was precipitated at the Cs/anion ratio of 0.5–2, while Cs3HPW12O40 was formed at the ratio of 3. Based on these results, the peculiar variation with x and heat-treatment observed for catalytic activity of CsxH3−xPW12O40 has been explained.
A CONVENIENT PREPARATION OF DIALKYL 3-(DIALKOXYPHOSPHINYL)-1-PROPENYL PHOSPHATE DERIVATIVES: ADDITION OF THE MIXED REAGENT TRIALKYL PHOSPHITE/DIALKYL PHOSPHOROCHLORIDATE TO α,β-UNSATURATED ALDEHYDE
Authors: Okamoto Yoshiki 
Published: July 2006

Abstract
The mixed reagent trialkyl phosphite/dialkyl phosphorochloridate reacts readily with α,β-unsaturated aldehydes to give dialkyl 3-(dialkoxyphosphinyl)-1-propenyl phosphate derivatives.
THE PLATINUM COMPLEX CATALYZED TRANSFORMATION OF PRIMARY AMINE TO SECONDARY AMINE
Authors: Tsuji Yasushi , Shida Jun , Takeuchi Ryo , Watanabe Yoshihisa 
Published: July 2006

Abstract
Platinum complex combined with SnCl2·2H2O activates a primary amine and catalyzes the transformation to the secondary amine at 180 °C. Dibutylamine was obtained from butylamine in 74% yield.
CHIRAL HYDRIDE REAGENTS CONTAINING (R/S)-2,2′-DIHYDROXY-6,6′-DIMETHYLBIPHENYL FOR REDUCTION OF ALKYL PHENYL KETONES
Authors: Suda Hiroshi , Kanoh Shigeyoshi , Umeda Nobuhiro , Ikka Masahiko , Motoi Masatoshi 
Published: July 2006

Abstract
Chiral hydride reagents for asymmetric reduction were prepared from LiAlH4, optically pure 2,2′-dihydroxy-6,6′-dimethylbiphenyl (1), and an achiral alcohol. They showed high enantioface discrimination in the reduction of prochiral alkyl phenyl ketones. The configuration of preferentially formed enantiomer always agreed with that of 1 used for the reagents. Further, polymeric reagents containing (R)-1 moiety were prepared and their behavior in the reduciton was described also.
TRANSFER OF ASYMMETRY BY THE PALLADIUM-CATALYZED ALKYLATION OF CHIRAL ALLYLIC SULFINATES
Authors: Hiroi Kunio , Kitayama Ryuichi , Sato Shuko 
Published: July 2006

Abstract
The palladium-catalyzed substitution of chiral allylic sulfinates was performed by the initial transformation of the sulfinates into allyl sulfones and the subsequent alkylation of the sulfones with retention of configuration. Reaction of trans- and cis-2-butenyl (S)-(−)-p-toluenesulfinate with the sodium salt of dimethyl malonate was undertaken in the presence of tetrakis(triphenylphosphine)palladium and triphenylphosphine to produce dimethyl (S)-(+)- and (R)-(−)-1-buten-3-ylmalonate, respectively, with the α-alkylated product, dimethyl 2-butenylmalonate.
RAMAN SPECTROSCOPIC STUDY OF NONIONIC SURFACTANTS. MOLECULAR CONFORMATIONS OF TRI- THROUGH OCTAETHYLENE GLYCOL MONODODECYL ETHERS IN THE SOLID STATE
Authors: Matsuura Hiroatsu , Fukuhara Koichi 
Published: July 2006

Abstract
Raman spectra of n-C12H25 (OCH2CH2)mOH with m=3–8 measured in the solid state. Molecular conformations of these surfactants were examined by utilizing normal coordinate treatment; the conformation of the oxyethylene chain is fundamentally identical with the helical structure of poly(oxyethylene).
BAND STRUCTURES OF TWO TYPES OF (BEDT-TTF)2I3
Authors: Mori Takehiko , Kobayashi Akiko , Sasaki Yukiyoshi , Kobayashi Hayao , Saito Gunzi , Inokuchi Hiroo 
Published: July 2006

Abstract
On the basis of the extended Hückel molecular orbital calculation, the intermolecular overlaps of the highest occupied molecular orbitals are calculated for α-(BEDT-TTF)2I3 reported by Bender et al., and for superconducting β-(BEDT-TTF)2I3 reported by Yagubskii et al. (BEDT-TTF: bis(ethylenedithio)tetrathiafulvalene). α-(BEDT-TTF)2I3 is a two-dimensional semimetal or a narrow gap semiconductor. β-(BEDT-TTF)2I3 is a two-dimensional metal which has an almost isotropic closed Fermi surface.
REGIOSELECTIVE C–O BOND CLEAVAGE OF ALLYLIC PHENYL CARBONATES PROMOTED BY GROUP 8 TRANSITION METAL HYDRIDO COMPLEXES
Authors: Hayashi Yoshinori , Komiya Sanshiro , Yamamoto Takakazu , Yamamoto Akio 
Published: July 2006

Abstract
Carbon–oxygen bonds in allylic phenyl carbonates are selectively cleaved by hydrido complexes of Co, Ru and Rh to give Co(OPh)L3, RuH(OPh)L2 and Rh(OPh)L3 with liberation of propylene and CO2. An intermediate complex RuH(O2COEt)L3 has been isolated in the reaction of RuH2(PPh3)4 with allyl ethyl carbonate. Reaction mechanisms are also discussed.
POLY(VINYLPYRROLIDONE)-BOUND DIPHENYLHEME
Authors: Tsuchida Eishun , Nishide Hiroyuki , Yokoyama Hiroyuki , Young Richard , Chang Chi K 
Published: July 2006

Abstract
trans-5-(o-Aminophehyl)-15-o-[m-(N-imidazolylmethyl)benzamido]phenyl-2,8,12,18-tetraethyl-3,7,13,17-tetramethylporphinato iron(II) (diphenylheme) was covalently combined to poly(1-vinyl-2-pyrrolidone); it formed an oxygen adduct in cooled aqueous media.
ASSISTANT EFFECTS OF CYCLODEXTRINS ON THE ALDOL REACTIONS CATALYZED BY ZINC(II) COMPLEXES OF l-TYROSINE ESTER
Authors: Nakagawa Masaji , Maruki Mitsuya , Watanabe Ken-ichi 
Published: July 2006

Abstract
Inclusion compounds of α- and β-cyclodextrins(CD) with p-nitrobenzaldehyde were prepared. They underwent the aldol reactions with acetone in the presence of Zn2+ complexes of l-tyrosine ester to afford an enantiomeric excess aldol-type product. The reactions of the β-CD compound were superior to that of the α-CD one both in reactivity and asymmetric induction.
ION-TRANSPORT ACROSS A MEMBRANE PREPARED BY GLOW DISCHARGE PLASMA POLYMERIZATION OF DICYCLOHEXYL-18-CROWN-6
Authors: Shinkai Seiji , Ishihara Midori , Manabe Osamu , Mizumoto Akira , Osada Yoshihito 
Published: July 2006

Abstract
Dicyclohexyl-18-crown-6 was “polymerized” on an acetylcellulose membrane by a glow discharge plasma. The membrane prepared under proper conditions showed the K+ selectivity in ion-transport.
CHARGE-TRANSFER EFFECT ON SUBSTRATE-BINDING BEHAVIOR OF OCTOPUS-LIKE AZACYCLOPHANES
Authors: Murakami Yukito , Kikuchi Jun-ichi , Tenma Hiroaki 
Published: July 2006

Abstract
The guest-binding efficiency of octopus-like azacyclophanes was examined with five different charge-transfer donors by means of fluorescence spectroscopy. Relative contributions of the hydro-phobic, electrostatic, and charge-transfer interactions in the overall guest-binding process were characterized.
SHORT CHAIN PEPTIDE INHIBITORS OF HUMAN RENIN
Authors: Matsueda Rei , Yabe Yuichiro , Kogen Hiroshi , Higashida Susumu , Koike Hiroyuki , Iijima Yasuteru , Kokubu Tatsuo , Hiwada Kunio , Murakami Eiki , Imamura Yoichi 
Published: July 2006

Abstract
The phenylalanine residue in the C-terminal sequence of angiotensin II was found to be important for the design of renin inhibitors. 1-Naphthyl-alanine(Nal(1))-containing tripeptide analogues such as benzyloxycarbonyl-Nal (1)-His-Leucinal (ES-188) and benzyloxycarbonyl-Nal(1)-His-(3S,4S)-4-amino-3-hydroxy-6-methylheptanoic acid (Statine) 2(S)-methylbuthylamid (ES-254) showed high potency and specificity to human renin.
ENHANCEMENT OF SURFACE BASE PROPERTY OF MAGNESIUM OXIDE BY THE COMBINATION OF METAL ION
Authors: Ueda Wataru , Yokoyama Toshio , Moro-Oka Yoshihiko , Ikawa Tsuneo 
Published: July 2006

Abstract
Surface base property of magnesium oxide can be modified by the addition of metal ion. The addition of metal ion with larger ionic radius than Mg2+ causes the increase of the amount of surface base site, whereas the addition of metal ion with smaller ionic radius than Mg2+ shows not to be effective.
ELECTRON-TRANSFER INTERACTION BETWEEN THE COMPLEXED SILVER(I) CATION AND RUTHENIUM ATOM IN POLYOXA[n]- AND 1,n-DIOXATHIA[n]RUTHENOCENOPHANES
Authors: Akabori Sadatoshi , Habata Yoichi , Sato Masaru 
Published: July 2006

Abstract
Polyoxa[n]ruthenocenophanes and 1,n-dioxathia[n]ruthenocenophanes were prepared. The complexes of the ruthenocenophanes with transition metal cations were isolated. The 1H-NMR and electronic spectra of the silver(I) ion-complexed 1,4,7,10,13,16-hexaoxa[16]ruthenocenophane suggested the presence of strong electron-transfer interaction between the complexed silver(I) cation and the ruthenium atom of the ruthenocene nucleus.
REGIOSPECIFIC AND SEQUENTIAL SUBSTITUTION OF TRIMETHYLSILYL-1,6-METHANO[10]ANNULENES VIA THE ELECTROPHILIC ipso-REACTION
Authors: Takahashi Kazuko , Ohnishi Keiichi , Takase Kahei 
Published: July 2006

Abstract
2-Substituted 7-trimethylsilyl-1,6-methano [10] annulenes have been prepared and their electrophilic ipso-desilyl-substitution has been studied, providing a new route for the regiospecific polyfunctionalization of 1,6-methano[10]annulenes.
HYDROGENOLYSIS OF ACYLCOBALT CARBONYL WITH METAL CARBONYL HYDRIDES
Authors: Koyasu Yukio , Fukuoka Atsushi , Uchida Yasuzo , Hidai Masanobu 
Published: July 2006

Abstract
Investigation of dinuclear reductive elimination reactions between hexanoylcobalt tetracarbonyl and various ruthenium and cobalt metal carbonyl hydrides showed that [HRu(CO)4]− reacts much faster to form hexanal than HCo(CO)4. Other hydrides such as [HRu3(Co)11]−, [H2Ru4(CO)12]2−, HRuCo3(CO)12 and HFeCo3(CO)12 are less reactive and compared with the above hydrides.
PHOTOCHEMISTRY OF AN α,β-UNSATURATED γ,δ-EPOXY NITRILE
Authors: Ishii Keitaro , Sakamoto Masanori 
Published: July 2006

Abstract
On 1π, π*-excitation (λ=254 nm, pentane), α,β-unsaturated γ,δ-epoxy nitrile showed selective product formation via carbonyl ylide and carbene intermediates; (E/Z)-isomerization and C(γ),O-cleavage of the oxirane, which are triplet processes, did not occur.
4,5- AND 3,5-BIS(ETHOXYCARBONYL)-2,7-DI-t-BUTYLTHIEPINES. SYNTHESIS AND THERMAL STABILITIES
Authors: Yamamoto Kagetoshi , Matsukawa Atsuhito , Murata Ichiro 
Published: July 2006

Abstract
4,5-Bis(ethoxycarbonyl)-2,7-di-t-butylthiepine and 3,5-bis(ethoxycarbonyl)-2,7-di-t-butylthiepine have been synthesized. Thermal stabilities of these thiepines have been examined and discussed in connection with those of the monocyclic thiepines reported so far.
NOVEL NAZAROV-TYPE CYCLIZATION OF TETRAHYDRO-4-OXOPYRAN-3-CARBOXYLIC ESTERS BY THE USE OF Me3SiCl–NaI REAGENT
Authors: Sakai Takashi , Miyata Kazuyoshi , Takeda Akira 
Published: July 2006

Abstract
Treatment of 2,5,6-tri-substituted tetrahydro-4-oxopyran-3-carboxylic esters with Me3SiCl–NaI reagent in DMF at 120 °C gave cyclopentenone derivatives via the Nazarov-type cyclization subsequent to possible dehydration.