bluuebunny/crossref_metadata_2025_split huggingface dataset:
NEW LOW-VALENT TITANIUM CATALYZED REACTION OF CHLORODIFLUOROMETHYL KETONES LEADING TO α,α-DIFLUORINATED β-HYDROXY KETONES
Authors: Ishihara Takashi , Yamanaka Tohru , Ando Teiichi 
Published: July 2006

Abstract
Various chlorodifluoromethyl ketones underwent the aldol-type reaction with aldehydes or ketones by the action of titanium tetrachloride and zinc reagent in tetrahydrofuran at room temperature to give moderate to good yields of α,α-difluorinated β-hydroxy ketones.
SYNTHESIS OF BOTH ENANTIOMERS OF ERYTHRO-6-ACETOXY-5-HEXADECANOLIDE, THE MAJOR COMPONENT OF A MOSQUITO OVIPOSITION ATTRACTANT PHEROMONE
Authors: Sato Toshio , Watanabe Makoto , Honda Naoki , Fujisawa Tamotsu 
Published: July 2006

Abstract
Stereoselective synthesis of both (5S,6R)-(+)- and (5R,6S)-(−)-6-acetoxy-5-hexadecanolides, the major component of a mosquito oviposition attractant pheromone, was achieved from (S)-2-cyclohexen-1-ol.
EVIDENCE IN THE FORMATION OF HEXACOBALT CARBONYL SPECIES ON OXIDE SUPPORTS
Authors: Nakamura Ryuichi , Okada Norio , Oomura Akihiro , Echigoya Etsuro 
Published: July 2006

Abstract
Interaction between Co2(CO)8 and TiO2, NaY zeolite, or dehydroxylated alumina resulted in the formation of a surface cobalt cluster carbonyl whose structure is probably [Co6(CO)16−n(Ls)n](Ls : the surface O2− or OH group). On the alumina the cluster was observed only at the limited Co loadings. On zeolite the formation of [Co(CO)4]− and [Co6(CO)15]2− were also presumed.
THE VOLUMETRIC BEHAVIOR OF AQUEOUS MIXTURES OF HYDROCARBON AND FLUOROCARBON SURFACTANTS
Authors: Harada Shigeharu , Sahara Hideko 
Published: July 2006

Abstract
The mean partial molal volumes (\barV) were determined for ca. 1:1 mixtures of sodium pentadecafluorooctanoate (SPFO) and sodium decyl sulfate (SDeS) or sodium dodecyl sulfate (SDS). The concentration dependence of \barV of the SPFO-SDeS mixture was quite similar to that for the respective components, while the \barV of the SPFO-SDS mixture revealed two stages of micelle formation.
PROTON AND NITROGEN-14 ENDOR SPECTRA OF AMINOXYL SPIN ADDUCTS FROM PBN
Authors: Janzen Edward G , Oehler Uwe M 
Published: July 2006

Abstract
Both N-14 and proton hyperfine splittings have been observed in the ENDOR spectra of spin adducts of phenyl t-butyl nitrone (PBN). From the differences in relative intensities of the ENDOR doublets the relative signs of the coupling constants can be ascertained.
ENT-KAURENOID METHYL ESTERS FROM Viguiera stenoloba, STRUCTURAL REVISION OF STENOLOBIN AND ITS BIOMIMETIC CONVERSION TO ZOAPATLIN
Authors: Delgado Guillermo , Vivar Alfonso Romo De 
Published: July 2006

Abstract
The structure of stenolobin, a diterpene from Viguira stenoloba, was revised to 5. The new diterpene, 15α-angeloyloxy stenolobin, was also isolated from the same plant source. The biomimetic transformation of stenolobin (5) to zoapatlin is described.
RHODIUM-CATALYZED STEREOSELECTIVE DEHYDROGENATION OF CIS- AND TRANS-METHYLCYCLOHEXANOLS BY MOLECULAR OXYGEN
Authors: Okamoto Tadashi , Sasaki Ken , Oka Shinzaburo 
Published: July 2006

Abstract
Methylcyclohexanols were dehydrogenated stereoselectively by rhodium phosphine catalyst and molecular oxygen. The less stable stereoisomers were consumed preferentially.
SYNTHESIS AND APPLICATION OF α-METHOXYALLYL SULFIDES AS A NOVEL α-METHYLENATED ACYL ANION EQUIVALENT
Authors: Mandai Tadakatsu , Takeshita Masahiro , Kawada Mikio , Otera Junzo 
Published: July 2006

Abstract
α-Methoxyallyl sulfides prepared from methoxy(phenylthio)methane proved to be a novel acyl anion equivalent providing a new synthetic method for α-methylenated ketones.
SYNTHESES OF PERILLENE AND ROSEFURAN FROM COMMON STARTING MATERIALS
Authors: Takano Seiichi , Morimoto Masamichi , Satoh Shigeki , Ogasawara Kunio 
Published: July 2006

Abstract
Two structurally isomeric furanomonoterpenes perillene and rosefuran have been synthesized using methallyl alcohol and prenyl chloride as common starting materials.
TiO2-SUPPORTED Fe–Co, Co–Ni, AND Ni–Fe ALLOY CATALYSTS FOR FISCHER-TROPSCH SYNTHESIS
Authors: Arai Hiromichi , Mitsuishi Kenshi , Seiyama Tetsuro 
Published: July 2006

Abstract
The activities of TiO2-supported bimetallic catalysts of Fe–Co, Co–Ni and Ni–Fe for CO conversion were greater than those of pure metal catalysts. The selectivities of alloy catalysts relative to pure metal catalysts were shifted to higher molecular hydrocarbons.
BIPHASIC SUBSTRATE-INCORPORATION BY SYNTHETIC MEMBRANE VESICLES
Authors: Murakami Yukito , Nakano Akio , Yoshimatsu Akira 
Published: July 2006

Abstract
The substrate-binding property of single-walled vesicles formed with N,N-ditetradecyl-Nα-(6-trimethylammoniohexanoyl)-l-alaninamide bromide was investigated from both static and dynamic viewpoints, hexyl p-nitrophenyl ether being used as a hydrophobic pseudo-substrate. The substrate-binding equilibrium was achieved through a two-step mechanism.
FACILE SYNTHESIS AND CONVERSION OF MAIN SKELETON OF ASPIROCHLORIN TO 3-AMINOCOUMARIN DERIVATIVES
Authors: Shin Chung-gi , Nakajima Yoshiharu , Sato Yoshiaki 
Published: July 2006

Abstract
The condensation of 1,4-diacetyl-2,5-piperazinedione with salicylaldehyde gave 1-acetyl-(Z)-3-salicylidene-2,5-piperazinedione and 3-(N-acetylglycyl)aminocoumarin by ca. 1:1 ratio. The former was readily converted with t-BuOCl into spiro[3H-benzofuran-2,3′-(2′,5′-dioxo)-piperazine] derivative which has a main skeleton of aspirochlorin.
NICKEL(II) COMPLEXES WITH NOVEL TETRADENTATE AMINOCARBOXYLATE LIGANDS
Authors: Fukuda Yutaka , Miyamae Hiroshi , Yamagata Keiko , Sone Kozo 
Published: July 2006

Abstract
Nickel(II) chelates with 1,4-diazacycloheptanediacetate(dachda) and its alkyl derivatives were newly obtained, and characterized by their electronic spectra and magnetic moments. The crystal structure of one of them, studied by X-ray diffraction method, confirmed the proposed square planar structure.
SYNTHESIS OF SUBSTITUTED BUTATRIENES AND NOVEL STRUCTURES OF THEIR O2-OXIDATION PRODUCTS
Authors: Iyoda Masahiko , Nishioka Kazuhiko , Nose Masanori , Tanaka Shigeyoshi , Oda Masaji 
Published: July 2006

Abstract
Synthesis of three 2,3-diiodo-1,3-dienes and conversion of these dienes into butatrienes are described. 2,5-Dimethylhexa-2,3,4-triene polymerizes on exposure to air to give the polymeric peroxide (C6H12O2)n which is reassigned as the structure containing acetylene and peroxide units.
REACTIONS OF METHYLYTTERBIUM IODIDE WITH ACTIVE HYDROGEN COMPOUNDS
Authors: Yokoo Kazuhiro , Kijima Yasushi , Fujiwara Yuzo , Taniguchi Hiroshi 
Published: July 2006

Abstract
Methylytterbium iodide (CH3YbI) has been found to react with active hydrogen compounds such as phenylacetylene and fluorene to give phenylpropynoic acid and fluorenol in modest yields. The reactivity of CH3YbI to these active hydrogen compounds is far higher than that of CH3MgI.
THE CRYSTAL STRUCTURE AND ELECTRICAL RESISTIVITY OF (BPDT-TTF)2I3
Authors: Kobayashi Hayao , Takahashi Miyuki , Kato Reizo , Kobayashi Akiko , Sasaki Yukiyoshi 
Published: July 2006

Abstract
The crystal of (BPDT-TTF)2I3 belongs to triclinic system with the lattice constants of a=16.350(4), b=9.246(3), c=6.843(2) Å, α=111.11(2), β=93.21(2), γ=91.39(2)°. The structure is isomorphic with the organic superconductor, β-(BEDT-TTF)2I3. The resistivity decreases with increasing the pressure and reaches 0.05 Ω cm at 10 kbar, though (BPDT-TTF)2I3 remains semiconductive up to at least 10 kbar.
PHOTOCHEMICAL REACTION OF 2-ALKENOYL-3,5-DIMETHYL-1,4-BENZOQUINONES WITH ALCOHOL
Authors: Maruyama Kazuhiro , Iwamoto Hidetoshi , Soga Osamu , Takuwa Akio 
Published: July 2006

Abstract
Irradiation of 2-alkenoyl-3,5-dimethyl-1,4-benzoquinones in alcohol under nitrogen atmosphere afforded the two isomeric adducts; benzofuranone derivatives and novel alkenyl ether derivatives. The mechanism of formation of these adducts is discussed.
CRYSTAL STRUCTURE AND REFLECTION SPECTRA OF (DBTTF)2-(Cu2Cl6) COMPLEX
Authors: Tanaka Masashi , Honda Masako , Katayama Chuji , Kamiya Kohji , Tanaka Jiro 
Published: July 2006

Abstract
X-Ray and optical reflection measurements of (DBTTF)2-(Cu2Cl6) single crystals were carried out. The single crystal of the complex consists of stacking columns of the cation molecules DBTTF+. The analysis of the reflection spectra of (DBTTF)2-(Cu2Cl6) single crystals shows that the electronic structure of DBTTF+ cation molecules is typical of the dimer type configuration.
PREPARATION AND PROPERTIES OF GROUP 8 TRANSITION METAL ALKOXIDES RELEVANT TO CATALYTIC HYDROGENATION OF KETONES TO ALCOHOLS
Authors: Hayashi Yoshinori , Komiya Sanshiro , Yamamoto Takakazu , Yamamoto Akio 
Published: July 2006

Abstract
Alkoxo complexes, M(OR)Ln and MH(OR)Ln (M=Co, Rh, Ru; L=PPh3; R=CH(CF3)2, CHPh(CF3)), have beeen prepared by insertion of fluoroketones into M–H bonds in CoH(N2)L3, RhHL4, and RuH2L4. Hydrogenolysis of the Ru- and Rh-alkoxo complexes with H2 or ethanol liberates corresponding fluoroalcohols in good yields. Catalytic activity in hydrogenation of ketones is correlated with the ease of hydrogenolysis of the alkoxo complexes.
THE PREPARATION AND CHIROPTICAL PROPERTIES OF CAGE-SHAPED PENTACYCLIC HYDROCARBONS; [m.n.0]TRIBLATTANES. HORSE LIVER ALCOHOL DEHYDROGENASE MEDIATED REDUCTION OF PENTACYCLO[5.5.0.02,6.03,9.05,8]DODECAN-4-ONE
Authors: Naemura Koichiro , Katoh Tohru , Chikamatsu Hiroaki , Nakazaki Masao 
Published: July 2006

Abstract
Diazomethane ring expansion of (+)-[1.1.0]triblattan-4-one and (−)-[2.1.0]triblattan-4-one gave [m.1.0]triblattanes (m=3–5) and [m.2.0]triblattanes (m=3–6) respectively, all of which are levorotatory. HLADH mediated reduction of (±)-[3.1.0]triblattan-4-one gave (−)-[3.1.0]triblattan-4-one which was converted into [m.3.0]triblattanes (m=3,4). These are dextrorotatory in spite of having the central core fixed in an M-helical conformation.
PHOTOCHEMISTRY OF DIBENZO-1,1,2,2,3,3 -HEXAMETHYL-1,2,3-TRISILACYCLOHEPTA-4,6-DIENE AND THE GERMANIUM ANALOG. GENERATION OF TETRAMETHYLDISILENE BY FREE-RADICAL DISPROPORTIONATION AND THE FIRST SPECTROSCOPIC DETECTION OF DIMETHYLGERMYLENE
Authors: Sakurai Hideki , Sakamoto Kenkichi , Kira Mitsuo 
Published: July 2006

Abstract
Photolysis of the title compound afforded silafluorene and dibenzo-1,2-disilacyclohexadiene as primary photoproducts. Two reactive intermediates, tetramethyldisilene and dimethylsilylene, were detected by trapping. The dimethylgermylene, derived from the germanium analog, was first observed by electronic spectra.
ULTRAVIOLET, CHARGE-TRANSFER, AND PHOTOELECTRON SPECTRA OF PHENYL-SUBSTITUTED GROUP 4B CATENATES, PhMe2E-E′Me3 (E = Si, Ge; E′ = C, Si, Ge, Sn)
Authors: Sakurai Hideki , Ichinose Michiko , Kira Mitsuo , Traylor Teddy G 
Published: July 2006

Abstract
UV, CT, and PE spectra of eight phenyl-substituted silanes and germanes of the type of PhMe2E-E′Me3 (E = Si, Ge; E′ = C, Si, Ge, Sn) are recorded. Extensive σ–π conjugation between σ(E-E′) and π orbitals is demonstrated to determine the unique electronic structures of these compounds.
EPIMERIZATION IN THE PHEOPHYTIN a/a′ SYSTEM
Authors: Watanabe Tadashi , Nakazato Masataka , Konno Mitsuo , Saitoh Sadao , Honda Kenichi 
Published: July 2006

Abstract
By means of a recently developed high-performance liquid chromatographic procedure with high resolution, a kinetic aspect of the epimeric interconversion between pheophytin a and a′ has been investigated for the first time.
ELEMENTAL SULFUR-CATALYZED SYNTHESIS OF N,N′-DISUBSTITUTED 1,3-DIIMINOISOINDOLINES FROM PHTHALONITRILE WITH AMMONIA AND AMINES
Authors: Sato Ryu , Senzaki Toshihide , Shikazaki Yoshihiro , Goto Takehiko , Saito Minoru 
Published: July 2006

Abstract
Various N,N′-disubstituted 1,3-diiminoisoindolines were synthesized by.the elemental sulfur-catalyzed reaction of phthalonitrile with ammonia and some primary amines in excellent yields. Several functionalized isoindolines were also obtained in high yields.
CONVENIENT SYNTHESIS OF VINYL KETONES VIA A NEW THREE CARBON HOMOLOGATING AGENT
Authors: Tuchinda Patoomratana , Prapansiri Vichukorn , Naengchomnong Waree , Reutrakul Vichai 
Published: July 2006

Abstract
Syntheses of vinyl ketones and the himachalene skeleton from 4-phenylthio-N,N -dimethylaminobutyronitrile were demonstrated.
A NEW SYNTHETIC ROUTE TO α-METHYLENE AND β-METHYLENE-γ-BUTYROLACTONES VIA HOMOLYTIC CARBOCYCLIZATION
Authors: Moriya Osamu , Okawara Makoto , Ueno Yoshio 
Published: July 2006

Abstract
α-Methylene-γ-butyrolactones were prepared using butoxyallene via stereoselective homolytic carbocyclization of vinyl radicals, similarly, β-methylene analogues were also prepared.
HIGHLY SELECTIVE DETERMINATION OF TRACE METAL IONS WITH 2,2′-DIHYDROXYAZOBENZENE BY ION-PAIR REVERSED-PHASE PARTITION HPLC-SPECTROPHOTOMETRIC DETECTION SYSTEM
Authors: Hoshino Hitoshi , Yotsuyanagi Takao 
Published: July 2006

Abstract
The 2,2′-dihydroxyazobenzene (DHAB) chelates of AlIII, CoII, VV, and FeIII ions give the well-resolved peaks on a Yanapak ODS-T column using an aqueous methanol mobile phase containing tetrabutylammonium bromide. The metal ions in the ng cm−3 to sub-μg cm−3 range are selectively determined with 0.01 absorbance unit full-scale at 510 nm. The versatility of DHAB derivatives in the HPLC system is demonstrated.
PHOTOCATALYSIS OF ZINC SULFIDE MICROCRYSTALS IN REDUCTIVE HYDROGEN EVOLUTION IN WATER/METHANOL SYSTEMS
Authors: Yanagida Shozo , Kawakami Hiroshi , Hashimoto Kazuhito , Sakata Tadayoshi , Pac Chyongjin , Sakurai Hiroshi 
Published: July 2006

Abstract
In photocatalytic H2 evolution using an aq. methanol system, high quality microcrystalline(cubic) ZnS powders have been found to be active under an appropriate light intensity, which is comparable in activity with freshly prepared ZnS suspensions. Comparison of photoactivities of some commercial ZnS with their surface properties has revealed that the surface purity of ZnS plays an important role in the photocatalysis, while the luminescence observed at 445 nm for the high quality ZnS microcrystals was not affected in the presence of oxygen, diethylamine, or methylviologen.
NEW SYNTHETIC IONOPHORES EXHIBITING SELECTIVITY FOR ALKALINE EARTH METAL IONS
Authors: Taguchi Kazuhiro , Hiratani Kazuhisa , Sugihara Hideki , Iio Kokoro 
Published: July 2006

Abstract
New noncyclic polyethers, which contain 3-carboxy-2-hydroxyphenyl group as one terminal group were prepared. These polyethers exhibit the ability to transport alkaline earth metal ions through chloroform liquid membrane, but not to transport alkali metal ions. Highly Ba++ -selective ionophores were synthesized in this series.
A CONVENIENT METHOD FOR THE CONSTRUCTION OF β-LACTAM COMPOUNDS FROM β-AMINO ACIDS USING 2-CHLORO-1-METHYLPYRIDINIUM IODIDE AS CONDENSING REAGENT
Authors: Huang Huamin , Iwasawa Nobuharu , Mukaiyama Teruaki 
Published: July 2006

Abstract
Various (β-lactams are prepared from the corresponding β-amino acids under mild reaction conditions in high yields by employing 2-chloro-1-methylpyridinium iodide as a condensing reagent.
STEREOSELECTIVE PREPARATION OF ACYCLIC syn-1,3-AMINO ALCOHOLS FROM β-HYDROXY KETONES
Authors: Narasaka Koichi , Ukaji Yutaka 
Published: July 2006

Abstract
syn-1,3-Amino alcohols are prepared in good yields by the stereoselective reduction of β-hydroxy ketone-O-benzyloximes derived from acyclic β-hydroxy ketones with lithium aluminium hydride.
A DIRECT 13C and 1H NMR STUDY ON THE CATION SOLVATION OF ALUMINUM PERCHLORATE SOLUTIONS IN AQUEOUS MIXTURE OF 3-METHYLSYDNONE
Authors: Yokoi Masatoki , Usami Yoshinori , Kubota Eiji 
Published: July 2006

Abstract
The solvation of 3-methylsydnone molecule to aluminum ion in water–3-methylsydnone mixture was studied by 13C and 1H NMR signal area measurements on the aluminum perchlorate solutions. 3-Methylsydnone solvation number was found to be 0.5 to 2.5 for the solution at mole ratios of Al to water greater than 1 : 20.
TEMPLATE SYNTHESIS OF POLYMER SCHIFF BASE COBALT(III) COMPLEX AND FORMATION OF SPECIFIC CAVITY FOR CHIRAL AMINO ACID
Authors: Fujii Yuki , Kikuchi Katsuhiro , Matsutani Katsuhiro , Ota Koji , Adachi Masami , Syoji Masato , Haneishi Ikuo , Kuwana Yasuo 
Published: July 2006

Abstract
Template synthesis for Δ-β2-[Co(Schiff base)(D-phe)] (Schiff base = 4-(p-vinylbenzyloxy)-sal2-(R,R)-chxn) was carried out by copolymerizing the complex with styrene and divinylbenzene. After treating the formed polymer complex gel with HCl, the gel took in D-phe preferentially (maximum optical purity = 74%), when it reacted with an excess of DL-PHE.
PHOTOVOLTAIC SANDWICH CELLS BASED ON THE CHLOROPHYLL A / WET POLY(VINYL ALCOHOL) JUNCTION
Authors: Uehara Kaku , Yoshikawa Takao , Katoh Masakazu , Tanaka Makoto , Isomatsu Norio , Hiraishi Masanori 
Published: July 2006

Abstract
A new type of photovoltaic device was made by contacting chlorophyll a (chl) layer with wet poly(vinyl alcohol) (PVA) film between two electrodes to give a cell such as Au/chl/PVA/Au. The cell showed a rectifying effect. It was suggested that the charge-separation upon irradiation of visible light might occur at the junction between chl layer and PVA film.
A NEW SYNTHESIS OF α-IODO CARBOXYLIC ACID USING IODINE-COPPER SALT
Authors: Horiuchi C Akira , Satoh J Yasuo 
Published: July 2006

Abstract
Direct α-iodination of some carboxylic acids, namely, acetic acid, propionic acid, butyric acid, and valeric acid, using iodine-copper salt, gave the corresponding α-iodo carboxylic acid in high yield. This new synthetic method afforded several advantage over classical α-iodo carboxylic acid procedures.
REACTION OF PHOTOGENERATED VINYL CATIONS WITH AMBIDENT ANIONS
Authors: Kitamura Tsugio , Kobayashi Shinjiro , Taniguchi Hiroshi 
Published: July 2006

Abstract
Photolysis of vinyl bromides with cyanate anion In a two-phase system gave only isoquinolinones as the N-site attacked products. However, the photolysis with thiocyanate anion gave both the N-site attacked products, isothioquinolinones or vinyl isothiocyanates, and the S-site attacked products, vinyl thiocyanates.
STANNOUS (II) TRIFLATE PROMOTED REARRANGEMENT OF β-KETO SULFOXIDES. SYNTHESIS OF 1,4-DIKETONES
Authors: Shimizu Makoto , Akiyama Takahiko , Mukaiyama Teruaki 
Published: July 2006

Abstract
Stannous triflate promotes rearrangement of β-keto sulfoxides to generate α-thiocarbocation, which in turn react with silyl enol ethers to give 2-arylsulfenyl-1,4-diketones in good yields.
STEREOSELECTIVE TRANSFORMATION OF 2,4-ALKADIENOIC ESTERS TO THE 3,5-DIENOIC ISOMERS WITH LITHIUM DIISOPROPYLAMIDE (LDA)
Authors: Tsuboi Sadao , Kuroda Akihisa , Masuda Toshihide , Takeda Akira 
Published: July 2006

Abstract
Treatment of 2(E),4(Z)-alkadienoic esters with lithium diisopropylamide (LDA) at −80 °C gave 3(E),5(E)-isomers with 81–98% stereoselectivity. In contrast, treatment of 2(E),4(E)-isomers with LDA gave 3(E),5(z)-isomers with 72–80% stereoselectivity.
A NOVEL SYNTHESIS OF THE α-HYDROXYKETONE MOIETY OF ANTHRACYCLINONES BY THE USE OF 2-TRIMETHYLSILYLETHYNYLCERIUM(III) REAGENTS
Authors: Suzuki Michiyo , Kimura Yoshikazu , Terashima Shiro 
Published: July 2006

Abstract
2-Trimethylsilylethynylcerium(III) reagents were found to efficiently react with 1,2,3,4-tetrahydronaphthalene-2-one derivatives, giving the corresponding adducts in high yields. Hydration of the adducts readily afforded the α-hydroxy methyl ketones which are versatile synthetic intermediates of natural and unnatural anthracyclinones.
ELECTRODE-CATALYZED [2+2]CYCLOREVERSION REACTION OF PHENYLATED BIS-HOMOCUBANES
Authors: Takahashi Yasutake , Sato Katsuhiro , Miyashi Tsutomu , Mukai Toshio 
Published: July 2006

Abstract
The constant potential anodic oxidation reaction of phenylated bis-homocubanes involved the [2+2]cycloreversion to give the dienes via a radical chain mechanism.
CYCLOPHANES CONTAINING NITROGEN ATOMS IN THE BRIDGED CHAINS. PHOTOCHROMISM OF N,N′-BIS(ARYLSULFONYL)-2,11-DIAZA[3.3]PARACYCLO(9,10)ANTHRACENOPHANES1)
Authors: Usui Masao , Nishiwaki Tohru , Anda Kinji , Hida Mitsuhiko 
Published: July 2006

Abstract
Diaza[3.3]paracyclo(9,10)anthracenophane derivatives were synthesized under the high dilution conditions. These cyclophanes showed reproducible photochromism both in solution and solid.
SPIN TRAPPING STUDY ON THE GENERATION MECHANISM OF ACTIVE OXYGEN RADICALS IN THE ENZYMATIC REDUCTION OF QUINOID ANTITUMOR AGENTS
Authors: Tero-Kubota Shozo , Ikegami Yusaku , Sugioka Katsuaki , Nakano Minoru 
Published: July 2006

Abstract
Generation of O2− from enzymatic reduction of purified aclacinomycin A with cytochrome P-450 reductase and NADPH in the presence of O2 was demonstrated by spin trapping method in phosphate buffer. Addition of Fe3+ ion into the above system led to the detection of both O2− and ·OH spin adducts.
ELECTROLYTIC REDUCTION OF 1-METHYLSULFINYL-1-METYLTHIO-2-ARYLETHENES AT MERCURY AND PLATINUM ELECTRODES IN ACETONITRIL
Authors: Kunugi Akira , Abe Kyo 
Published: July 2006

Abstract
The electrolytic reduction of 1-methylsulfinyl-1-methylthio-2-arylethenes involves a cleavage of one carbon–sulfur bond, resulting in formation of E-1-methylthio-2-arylethenes in good yields, but not Z-isomers, in the presence of excess phenol as a proton donor.
STEREO- AND REGIO-SELECTIVE ALDOL-TYPE REACTIONS OF ALKYLPYRIDINES WITH BENZALDEHYDE
Authors: Hamana Hiroshi , Sugasawa Tsutomu 
Published: July 2006

Abstract
Stereo- and regio-selectivity in the reaction of alkylpyridines with benzaldehyde were studied. Erythro-selectivity could be obtained in the reaction of 2-alkylpyridine with benzaldehyde in the presence of dialkylboryl triflate and triethylamine. Substitution at the 2- or 4-position of 2,4-lutidine could be controlled by the combination of dialkylboryl triflate and an aliphatic tertiary amine. The steric effect had an important role in the reaction of 4-picoline and lepidine.
NEW ENTRY TO THE PREPARATION OF CHIRAL BIS(DICYCLOHEXYLPHOSPHINO)ALKANE DERIVATIVES. USE FOR RHODIUM-CATALYZED HYDROGENATION OF CARBONYL COMPOUNDS
Authors: Yamamoto Keiji , Saeed-Ur-Rehman  
Published: July 2006

Abstract
Conversion has been achieved of two representative chiral diphosphines, (−)-DIOP and (S,S)-Chiraphos, into the corresponding bis(dicyclohexylphosphino)alkane derivatives, the latter being used for chiral ligands of the rhodium(I) catalyst in the homogeneous hydrogenation of prochiral carbonyl compounds.
EFFECT OF METAL DISPERSION ON THE ACTIVITY AND SELECTIVITY OF Rh/SiO2 CATALYST FOR HIGH PRESSURE CO HYDROGENATION
Authors: Arakawa Hironori , Takeuchi Kazuhiko , Matsuzaki Takehiko , Sugi Yoshihiro 
Published: July 2006

Abstract
Metal dispersion has a striking influence on the activity and selectivity of Rh/SiO2 for high pressure CO hydrogenation. Decreasing dispersion, turnover frequency of CO conversion does not change significantly with dispersion up to 0.5 but increases abruptly at dispersion of 0.45. CH3OH is produced selectively at high dispersion. C2-oxygenated compounds are produced favorably for dispersion of 0.25–0.45. CH4 formation increases monotonously with decrease of dispersion.
SYNTHESIS OF AMINOCYCLITOL PART OF 5-DE-O-METHYLSPORARICIN A
Authors: Yasuda Nobuyoshi , Matsuda Keiji , Tsutsumi Hideo , Takaya Takao 
Published: July 2006

Abstract
d,l-(1,2,4/5,6)-1,4,6-tri-O-acetyl-2,5-bis(benzyloxycarbonylamino)-5-N-methyl-1,4,6-cyclohexanetriol was synthesized from d,l-(1,2,3/4,5,6)-1,4-bis(benzyloxycarbonylamino)-2,3-O-isopropylidene-2,3,5,6-cyclohexanetetraol.
CHIRALITY TRANSFER IN THE ESTER ENOLATE CLAISEN REARRANGEMENT OF (R)-1-METHYL-(E)-2-BUTENYL HYDROXYACETATE AND ITS APPLICATION TO THE STEREOCONTROLLED PHEROMONE SYNTHESIS
Authors: Fujisawa Tamotsu , Tajima Kazuhisa , Sato Toshio 
Published: July 2006

Abstract
The ester enolate Claisen rearrangement of (R)-1-methyl-(E)-2-butenyl hydroxyacetate provides complete asymmetric transfer along with 98% erythroselectivity to give (2R,3S)-2-hydroxy-3-methyl-(E)-4-hexenoic acid. Its synthetic utility is demonstrated by the stereocontrolled synthesis of optically active pheromones.
NOVEL CYCLIZATION OF 2-(HYDROXYIMINO)-2-PHENYLETHYL DITHIOCARBOXYLATES
Authors: Ishida Masaru , Nakanishi Hirofumi , Kato Shinzi 
Published: July 2006

Abstract
2-(Hydroxyimino)-2-phenylethyl arenedithiocarboxylates were cyclized to isothiazoles by the treatment with tosyl isocyanate.