bluuebunny/crossref_metadata_2025_split huggingface dataset:
AN EFFICIENT METHOD FOR THE STEREOSELECTIVE SYNTHESIS OF TRICYCLIC COMPOUNDS—THE INTRAMOLECULAR DIELS–ALDER REACTION OF CYCLIC α,β-UNSATURATED CARBOXAMIDES—
Authors: Takebayashi Toyonori , Iwasawa Nobuharu , Mukaiyama Teruaki 
Published: July 2006

Abstract
An efficient method for the stereoselective synthesis of tricyclic compounds was studied by the intramolecular Diels–Alder reaction utilizing the internal coordination of the magnesium salt. The magnesium salts of N-(2,4-alkadienyl)-N-(2-hydroxyphenyl) cyclopent-1-enecarboxamides afford predominantly trans-fused cycloadducts via exo-mode of cyclization.
PREPARATION AND ELECTRICAL PROPERTIES OF Eu(II)xNb(II)1−xO
Authors: Ishikawa Kenji , Adachi Gin-ya , Shiokawa Jiro 
Published: July 2006

Abstract
Two new compounds, EU0.33Nb0.67O and Eu0.5Nb0.5O, have been found in the ternary system Eu(II)x Nb(II)1−xO. Electrical resistivity measurements have shown that EU0.33Nb0.67O is a metallic conductor while Eu0.5Nb0.5O is a semiconductor. Strontium analogs of these compounds, Sr0.33Nb0.67O and Sr0.5Nb0.5O, have also been attempted to prepare. The former was obtained as a single phase.
THE IDENTIFICATION OF THE COMPOSITION OF THE INSOLUBLE ADDITION COMPOUND
Authors: Hihara Goro , Miyamae Hiroshi , Nagata Miharu 
Published: July 2006

Abstract
A method has been developed for ascertaining the compositions of the insoluble compounds which may be grown by addition reactions of an insoluble substance with a soluble substance in a solution. This method was applied to the addition reaction of lead(II) iodide with ethylenediamine(en) in a ternary system of PbI2-en-ethanol, and three addition compounds are identified as 3PbI2·2(en), PbI2·(en), and PbI2·2(en).
SELECTIVE α-CLEAVAGE IN PHOTOLYSIS OF 7-SUBSTITUTED-6,9-DIMETHYL-6,7,8,9-TETRAHYDRO-6α,9α-EPOXYBENZOCYCLOOCTENE-5,10-DIONE
Authors: Osuka Atsuhiro , Suzuki Hitomi , Maruyama Kazuhiro 
Published: July 2006

Abstract
Photolysis of the title compounds in benzene gave spirophthalides and E- and Z-alkylidene phthalides via preferential α-cleavage at the more crowded side. On the basis of quantum yields and triplet lifetimes, this preference is indicated to arise from the different efficiencies of the radical recombination of possible biradicals.
DECAY MECHANISM OF THE 1-HYDRO-4-PHENYLPYRIDINYL RADICAL
Authors: Sano Yutaka , Tero-Kubota Shozo , Ito Osamu , Ikegami Yusaku 
Published: July 2006

Abstract
Intermediate formation of radical pair has been proposed in the dimerization of 1-hydro-4-phenylpyridinyl radical from the observation of two-step decay of the radical, in which the fast step is represented by second-order and the slow step is first-order. The activation parameters were determined.
PHOTOCHEMICAL CONVERSION OF PYRAZOLES TO ENAMINONITRILES AND IMIDAZOLES
Authors: Wakamatsu Shigeru , Barltrop John A , Day A Colin 
Published: July 2006

Abstract
Irradiation of pyrazole, 1-methylpyrazole and 4-cyano-1-methylpyrazole gave 3-aminoacrylonitrile, 3-methylaminoacrylonitrile and 2-cyano-3-methylaminoacrylonitrile along with corresponding imidazoles. A new pathway is proposed in which both enaminonitrile and imidazole are produced immediately from pyrazole, besides the sequence of pyrazole→enaminonitrile→imidazole.
SYNTHESES OF LICOISOFLAVONE A AND 5′-ALKENYL ISOMER
Authors: Tsukayama Masao , Fujimoto Kunihiro , Horie Tokunaru , Yamashita Yoshiro , Masumura Mitsuo , Nakayama Mitsuru 
Published: July 2006

Abstract
2′,4′,5,7-Tetrahydroxyisoflavone was partially benzoylated with benzoyl chloride to give 7-benzoyloxy-2′,4′,5-trihydroxyisoflavone. The condensation of 7-benzoyloxyisoflavone with 2-methyl-3-buten-2-ol, followed by the hydrolysis of the resultant 3′-(3-methyl-2-butenyl)isoflavone afforded licoisoflavone A. Its 5′-(3-methyl-2-butenyl) isomer was also synthesized from 5-benzoyloxyisoflavone.
DIANION OF DIETHYL SUCCINATE: REACTIONS WITH ALKYLATING AGENTS AND CARBONYL COMPOUNDS
Authors: Pohmakotr Manat , Reutrakul Vichai , Phongpradit Tipparat , Chansri Arayan 
Published: July 2006

Abstract
Dianion of diethyl succinate reacted readily with alkylating agents and carbonyl compounds to give α,β-dialkylsubstituted diethyl succinate and paraconic esters respectively. The conversion of some paraconic esters into 4-carboethoxycyclopentenones was also demonstrated.
PREPARATION OF SEVERAL NEW Ni- OR Pd-CONTAINING CYCLIC AMIDE AND ESTERS, (PR3)nNiCH2CH2CH2COZ (Z = NH, O) AND PCY3PdCH2CH2CH2COO, AND RING CONTRACTION OF THE SIX-MEMBERED Ni-CONTAINING CYCLIC ESTER TO ITS FIVE-MEMBERED ISOMER
Authors: Sano Kenji , Yamamoto Takakazu , Yamamoto Akio 
Published: July 2006

Abstract
New metallacyclic amide and esters (PCy3NiCH2CH2CH2CONH, (PR3)nNiCH2CH2CH2COO, PCy3pdcH2CH2CH2COO) have been prepared by reactions of zero-valent nickel and palladium complexes with unsaturated amide and acid. The 6-membered Ni-containing cyclic ester undergoes a ring contraction reaction to a 5-membered isomer.
SYNTHESIS OF AZULENO[2,1-d]THIAZOLE
Authors: Yamane Kameji , Fujimori Kunihide , Ichikawa Shuji 
Published: July 2006

Abstract
Azuleno[2,1-d]thiazoles were obtained by the deamination of 2-aminoazuleno[2,1-d]thiazoles, which were synthesized by the treatment of ethyl 2-acetylamino-3-thiocyanatoazulene-1-carboxylate with base or aluminum oxide.
GENERATION, CHARACTERIZATION AND QUENCHING OF THE DIANION OF TETRAKIS(TRIMETHYLSILYL)ETHYLENE
Authors: Sakurai Hideki , Nakadaira Yasuhiro , Tobita Hiromi 
Published: July 2006

Abstract
Reduction of tetrakis(trimethylsilyl)ethylene with excess lithium gave a stable dianion, the first dianion of nonconjugated olefin. NMR characteristics as well as quenching experiments are described.
REACTION OF CHALCONES WITH 2,4-BIS(4-METHOXYPHENYL)-1,3,2,4-DITHIADIPHOSPHETANE-2,4-DISULFIDE
Authors: Kametani Shunichi , Ohmura Haruo , Tanaka Hideyuki , Motoki Shinichi 
Published: July 2006

Abstract
Though the reaction of chalcones 2 with 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide 1 in refluxing benzene gave the corresponding thiochalcone dimers 3, the reaction in refluxing xylene gave new phosphorus-containing compounds, 2-(4-methoxyphenyl)-3,5-diaryl-Δ4-1,2-thiaphospholene-2-sulfides 4.
EFFECTS OF HETERO- AND PERIPHERAL SUBSTITUTIONS ON PHOTOCURRENT QUANTUM YIELDS: PARA-SUBSTITUTED TETRAPHENYLDITHIAPORPHYRINS
Authors: Yamashita Kazuo , Yamamoto Toshimasa , Shimidzu Hiroaki , Suzuki Hitomi 
Published: July 2006

Abstract
Replacement of two NH groups of the porphyrin in meso-tetraphenylporphinato core by two S atoms shifts the oxidation potential to the positive direction and increases the photocurrent quantum yields of the Al/Porphyrin/Ag cells. The previously observed correlation between the ease of oxidation of porphyrins and the higher quantum yields was confirmed in a series of para- substituted tetraphenyldithiaporphyrins.
FLAVIN-Zr4+ COMPLEX AS OXIDATION CATALYST
Authors: Shinkai Seiji , Ishikawa Yu-ichi , Manabe Osamu 
Published: July 2006

Abstract
A new metal-coordinative flavin, 2,4-dimethylpyrido[5,6-h](10-methyl)isoalloxazine was synthesized. The complex with Zr4+ acted as an efficient catalyst for the oxidation of alcohols and ascorbic acid under mild reaction conditions.
CORRELATION BETWEEN REDUCTION POTENTIAL AND CHARGE-TRANSFER FREQUENCY OF ALKOXO-BRIDGED BINUCLEAR COPPER(II) COMPLEXES OF VARIOUS TRIDENTATE LIGANDS
Authors: Mikuriya Masahiro , Nakamura Masaaki , Okawa Hisashi , Kida Sigeo 
Published: July 2006

Abstract
Spectral and electrochemical properties of alkoxo-bridged binuclear copper(II) complexes of various tridentate ligands with NNO-, NSO-, SNO- and SSO-donor sets were examined. Reductions of the complexes with NNO-, NSO(and SNO)- and SSO-donor sets occurred at −0.2 – −0.5, 0– −0.2 and +0.15 V vs. SCE respectively, while the charge transfer bands characteristic of the complexes were found at 26–28×103, 24.5–25×103 and ∼23.5×103 cm−1respectively. It was found that a linear correlation exists between the reduction potentials and the CT frequencies of the complexes.
POLYMERIZATION OF BENZENE WITH Cu(AlCl4)2
Authors: Kitajima Nobumasa , Hakone Yoshiaki , Ono Yoshio 
Published: July 2006

Abstract
Cu(AlCl4)2 reacts with benzene to give poly(1,4-phenylene). When 2.5 mmol of benzene was reacted with 2.5 mmol of Cu(AlCl4)2 at 20°C for 2 h, poly(1,4-phenylene) was obtained in 92 % yield, which is higher than that obtained with the conventional system, AlCl3–CuCl2 mixture, under the same conditions.
SYNTHETIC APPLICATION OF THIOSILANES TO THIOESTERS
Authors: Ando Wataru , Furuhata Toshiya , Tsumaki Hidetoshi , Sekiguchi Akira 
Published: July 2006

Abstract
Thiosilanes such as ethylthiotrimethylsilane, hexamethyldisilthiane, and t-butylthiotrimethylsilane, react readily with acyl chlorides at room temperature in the presence of potassium fluoride to give the corresponding thioesters in excellent yields.
A NOVEL REACTION AND MECHANISM OF A DIHALOGENATED Δ4-3-KETOSTEROID: STEREOELECTRONIC CONTROL IN A COMPLICATED SN2′ DISPLACEMENT
Authors: Koga Toshitaka , Toh Namiko , Nogami Yasuyoshi 
Published: July 2006

Abstract
Stereochemistry of the acetolysis of 4,6β-dibromo-Δ4-3-ketosteroicl was examined and a new route of simultaneous introduction of two O-functions at C-2 and C-6 on the steroid skeleton has been established. The reaction is interpreted to proceed by characteristic and successive SN2′ reaction mechanisms, and stereoelectronic effects control the stereochemistry of the reaction. There is no occurrence of SN1, SN2, and any rearrangement courses.
SYNTHESIS OF Bis(2,2-BIS(ETHYLTHIO)ETHENYL) SULFOXIDE
Authors: Yokoyama Masataka , Hayashi Masahiro , Imamoto Tsuneo 
Published: July 2006

Abstract
(Methylsulfinyl)ketenedithioacetals (3) and alkyl (methylsulfinyl)dithioacetates (4) were prepared from dimethyl sulfoxide. Next, the useful title compound (8) was synthesized from 4.
CONSTITUENTS OF Pluchea sericea. STRUCTURE AND STEREOCHEMISTRY OF (11S)-11,13-DIHYDROTESSARIC ACID
Authors: Vivar Alfonso Romo De , Reyes Benito , Delgado Guillermo , Schlemper Elmer O 
Published: July 2006

Abstract
A chemical investigation of Pluchea sericea (Inuleae, Compositae) afforded the new sesquiterpene, (11S)-11,13-dihydrotessaric acid (7), in addition to tessaric acid (6), quercetin-3′-dimethyl ether (5) and taraxasteryl acetate (4). The structure of the acid (7) was elucidated by chemical transformations as well as spectroscopic methods and X-ray diffraction analysis.
STEREOSELECTIVE PREPARATION OF γ-BUTYROLACTONE DERIVATIVES FROM γ-HYDROXY-α-NITRO-OLEFIN AND ACTIVE METHYLENE COMPOUNDS
Authors: Sakakibara Tohru , Ikeda Yutaka , Miura Toshinari , Sudoh Rokuro 
Published: July 2006

Abstract
Stereoselective preparation of γ-butyrolactone derivatives from 5,5-dimethyl-3-nitrocyclohex-2-en-1-ol and active methylene compounds is described.
SYNTHESIS OF FERROCENOPHANE AND [2] AND [3]FERROCENOPHANE-TIN CHLORIDE ADDUCTS AND THEIR MÖSSBAUER SPECTROSCOPIC STUDIES
Authors: Watanabe Masanobu , Ichikawa Hajime , Motoyama Izumi , Sano Hirotoshi 
Published: July 2006

Abstract
Adducts of tin–tetrachloride with [2]ferrocenophane were prepared by treating SnCl4 with [2]ferrocenophane in hexane. The adducts were studied by means of 57Fe- and 119Sn-Mössbauer spectroscopy and other physicochemical measurements. An anomalously large quadrupole splitting value found in the 57Fe-Mössbauer spectroscopy of the red-orange adduct prepared from [2]ferrocenophane (3.49 mm s−1 at 78 K, 3.45 mm s−1 at 300 K) suggests the presence of a direct chemical bonding between Fe and Sn atoms, whereas the dark green adducts prepared from ferrocene and [3]ferrocenophane consist of ferrocenium and [3]ferrocenophanium cations, respectively.
SYNTHESIS OF A HEAT-STABLE ENTEROTOXIN PRODUCED BY A HUMAN STRAIN OF ENTEROTOXIGENIC Escherichia coli
Authors: Ikemura Haruo , Yoshimura Shoko , Aimoto Saburo , Shimonishi Yasutsugu , Takeda Tae , Takeda Yoshifumi , Miwatani Toshio 
Published: July 2006

Abstract
A heat-stable enterotoxin, produced by a human strain of enterotoxigenic Escherichia coli, was synthesized by a solution method. The synthesized peptide has the same biological and physicochemical properties as those of native toxin.
FRONTIER ORBITAL CONTROL FOR THE HYDROXYL RADICAL ATTACK ON AROMATICS
Authors: Tezuka Takahiro , Ichikawa Kazuhiko , Marusawa Hiroshi , Narita Nozomu 
Published: July 2006

Abstract
The ortho:meta:para isomer ratio and p/m value observed in the aromatic hydroxylation with hydroxyl radical in anhydrous organic media are correlated with the electron density of HOMO of aromatics.
SYSTEMATIC SYNTHESIS OF PURINE 8,5′-IMINO AND SUBSTITUTED IMINO CYCLONUCLEOSIDES
Authors: Sasaki Tadashi , Minamoto Katsumaro , Fujiki Yasumi 
Published: July 2006

Abstract
A systematic synthesis of some purine 8,5′-imino and substituted imino cyclonucleosides has been introduced. Thus, 2′,3′-O-isopropylidene derivatives of 8-methylaminoadenosine, 8-methylaminoinosine, 8-benzylaminoadenosine and 8-benzylaminoinosine with excess diphenyl carbonate/Et3N in DMF gave the corresponding 8,5′substituted imino cyclonucleosides. These were converted to the debenzylated derivatives or to 8,5′-methylimino cycloadenosine.
GENERATION AND REACTIONS OF THE ALLYLIC CARBANION SPECIES FROM 2-METHYL-3-(PHENYLTHIO)PROPENOIC ACID DERIVATIVES
Authors: Kitaoka Masaki , Takahashi Yasuhiro , Kosugi Hiroshi , Uda Hisashi 
Published: July 2006

Abstract
(Z)-2-Methyl-3-(phenylthio) propenoic acid and (E)-N-t-butyl-2-methyl-3-(phenylthio) propenamide produce selectively the corresponding allylic carbanion species, which react with aldehydes and ketones. The same carbanion species are also generated from 2-(phenylthiomethyl)propenoic acid and its N-t-butyl amide.
SYNTHESIS OF SILYLDIAZOKETONES FROM LITHIUM PENTAMETHYLDISILANYLDIAZOMETHANE WITH ACID CHLORIDES
Authors: Sekiguchi Akira , Sato Takashi , Ando Wataru 
Published: July 2006

Abstract
Lithium pentamethyldisilanyldiazomethane, prepared from pentamethyldisilanyldiazomethane and lithium diisopropylamide, reacts with acid chlorides to give pentamethyldisilanyldiazoketones in good yields.
EXAFS STUDY ON THE LOCAL STRUCTURE CHANGES AROUND Ni ATOM DURING THE COURSES OF Ni/SiO2 CATALYST PREPARATION PROCEDURES
Authors: Tanabe Shuji , Ueno Akifumi , Tohji Kazuyuki , Udagawa Yasuo 
Published: July 2006

Abstract
The changes of local structures around Ni atom were studied by means of EXAFS spectroscopy at every elementary step of two kinds of Ni/SiO2 catalyst preparation methods. From the analysis of EXAFS spectra, complemented by the observations by an electron microscope, differences by the structure of intermediate products by the two preparation methods have been revealed.
PHOTOREDUCTION OF CARBON DIOXIDE TO FORMIC ACID MEDIATED BY A METHYLVIOLOGEN ELECTRON RELAY
Authors: Kitamura Noboru , Tazuke Shigeo 
Published: July 2006

Abstract
Carbon dioxide was photochemically reduced to formic acid in the aqueous system of tris(2,2′-bipyridine)ruthenium(II)-methylviologen-triethanolamine under carbon dioxide atmosphere. Photoirradiation of the system for 4 h gave 4.5×10−3 M of formic acid (quantum yield (Ψ) ≈0.01) as determined by isotachophoresis.
CRYSTAL STRUCTURES OF THE o-, THE m-, AND THE p-TOLUIDINE CLATHRATES IN BISDIMETHYLAMINECADMIUM(II) TETRACYANONICKELATE(II) HOST
Authors: Nishikiori Shin-ichi , Iwamoto Toschitake 
Published: July 2006

Abstract
The crystal structures of three clathrates Cd(NH(CH3)2)2Ni(CN)4.G (G = o-CH3C6H4NH2, m-CH3C6H4NH2, and p-CH3C6H4NH2) have been analyzed by single crystal X-ray diffraction method. The structures are substantially similar to one another, although the way of puckering in the two-dimensional metal cyanide network in the host structure of the o-isomer clathrate is different from the two others.
THE REDUCTIVE COUPLING REACTION OF DIARYLIODONIUM SALTS CATALYZED BY PALLADIUM–ZINC SYSTEM
Authors: Uchiyama Masaharu , Suzuki Takehiko , Yamazaki Yasuo 
Published: July 2006

Abstract
Biaryls are readily obtained in good yields by reductive coupling reactions of various diaryliodonium salts in the presence of zinc and a palladium catalyst under mild conditions.
PARAMAGNETIC SHIFT AND LIGAND EXCHANGE IN URANIUM(V)-DMF COMPLEX
Authors: Harazono Toshie , Tomiyasu Hiroshi , Fukutomi Hiroshi 
Published: July 2006

Abstract
The rate of ligand exchange in a U(V)-DMF complex was determined for the first time in N,N-dimethylformamide(DMF) at temperatures below −40°C by using the 1H NMR method. The paramagnetic shift by U(V) was also observed in the 1H and 13C NMR signals of bulk DMF owing to the fast exchange between the first coordination sphere of U(V) and the bulk solvent at 25°C.
CARBOXYLATION OF 1,3-DIMETHYLURACIL AND THIOPHENES WITH CARBON MONOXIDE AND PALLADIUM(II) ACETATE IN THE PRESENCE OF SODIUM PEROXODISULFATE
Authors: Itahara Toshio 
Published: July 2006

Abstract
Treatments of 1,3-dimethyluracil and of thiophenes with palladium(II) acetate and sodium peroxodisulfate under a carbon monoxide atmosphere gave 1,3-dimethyluracil-5-carboxylic acid and the corresponding thiophene-2-carboxylic acids, respectively.
A SHORT-STEP SYNTHESIS OF ANTIBIOTIC A26771B UTILIZING THE RING-OPENING REACTION OF β-ETHYNYL-β-PROPIOLACTONE
Authors: Fujisawa Tamotsu , Okada Nobuki , Takeuchi Masashi , Sato Toshio 
Published: July 2006

Abstract
The total synthesis of antibiotic A26771B was completed in short steps from 15-hydroxy-3,4-hexadecadienoic acid which was easily prepared by the ring-opening reaction of β-ethynyl-β-propiolactone with Grignard reagent in the presence of a copper(I) catalyst.
STEREOSELECTIVE SYNTHESIS OF BIOTIN PRECURSOR
Authors: Kinoshita Hideki , Futagami Masato , Inomata Katsuhiko , Kotake Hiroshi 
Published: July 2006

Abstract
Stereoselective synthesis of N,N′-dibenzyl-cis-ureylenetetrahydrothiophene as a precursor of biotin starting from the imidoyl chloride derivative readily prepared from the reaction of 3-sulfolene with sulfuryl chloride in acetonitrile was described.
57Fe NMR OF IRON(II) LOW SPIN HEMES
Authors: Nozawa Tsunenori , Sato Mitsuo , Hatano Masahiro , Kobayashi Nagao , Osa Tetsuo 
Published: July 2006

Abstract
57Fe NMR signals were obtained by using a steady-state free precession method for a bis(pyridine) complex of [15N4,57Fe]-meso-tetraphenylporphine and a bis(pyrrolidine) complex of [15N4,57Fe]-meso-p-tolylporphine at 7260 and 7340 ppm low field from that of pentacarbonyliron (0) (Fe(CO)5), respectively.
ELECTROGENERATED ACID AS AN EFFICIENT CATALYST FOR ACETALIZATION OF CARBONYL GROUP WITH 1,2-BISTRIMETHYLSILOXYETHANE
Authors: Torii Sigeru , Inokuchi Tsutomu 
Published: July 2006

Abstract
Electrolysis of a mixture of carbonyl compounds and bistrimethylsiloxyethane in CH2Cl2–LiClO4–(Pt) readily gave the corresponding acetalized products in good yields.
RECONSTITUTED SPERM WHALE MYOGLOBINS WITH IRON AND COBALT COMPLEXES OF CHLORINS
Authors: Takeda Motoru , Aoyagi Katsuhiro , Aoyama Yasuhiro , Ogoshi Hisanobu 
Published: July 2006

Abstract
Reconstituted myoglobins (Mb) with iron and cobalt complexes of chlorins were prepared for the first time. The Fe(II)–Mb’s form oxy-adducts, but the reversibility of oxygen binding is rather poor. The Co(II)–Mb’s prepared under anaerobic conditions bind O2 reversibly. Reconstitution under aerobic conditions leads to Co(III)–myoglobins; Co(II) proteins derived therefrom undergo instantaneous oxidation back to the Co(III) derivatives.
SYNTHESIS AND STEREOCHEMISTRY OF 2-PYRIDINETHIOLATO ETHYLENEDIAMINE MIXED COMPLEXES OF COBALT(III)
Authors: Kita Masakazu , Yamanari Kazuaki , Shimura Yoichi 
Published: July 2006

Abstract
A series of mixed complexes [Co(pyt)3−n(en)n]n+ (n = 0, 1, and 2) have been newly prepared and characterized by their visible and ultraviolet absorption, circular dichroism, and magnetic circular dichroism spectra (pyt = 2-pyridinethiolato-N,S ligand). In [Co(pyt)3] or [Co(pyt)2(en)]+ complex, only one geometrical isomer, mer(S) or trans(S), has been obtained, respectively.
COMPLEXATION OF “CROWNED” DINITROPHENYLAZOPHENOL WITH ALKALI AND ALKALINE EARTH METAL IONS AND ITS APPLICATION TO THE COLORIMETRIC DETERMINATION OF Rb(I) AND Cs(I)
Authors: Nakashima Kenichiro , Yamawaki Yûko , Nakatsuji Shin’ichi , Akiyama Shuzo , Kaneda Takahiro , Misumi Soichi 
Published: July 2006

Abstract
Complexation of “crowned” dinitrophenylazophenol (CDPA) with alkali and alkaline earth metal ions in CHCl3–MeOH–triethylamine was examined. The ionic radii of these metal ions correlated linearly both with the wave numbers of absorption maxima and with the molar absorption coefficients of the resulting complexes except for Be(II). The colorimetric determination of Rb(I) and Cs(I) by using CDPA was practical.
A NEW STEREOSELECTIVE SYNTHESIS OF VINYLSILANES UTILIZING VINYL SULFONES
Authors: Ochiai Masahito , Ukita Tatsuzo , Fujita Eiichi 
Published: July 2006

Abstract
Vinylsilanes 3 were prepared stereoselectively from vinyl sulfones via the formation of β-tributylstannyl sulfones 2. The stereochemistry of 3 was controlled by the choice of the method for the destannylsulfonation of 2.
A NOVEL PHOTOREARRANGEMENT OF 2,5-DIARYL-1,4-DITHIIN-1,1-DIOXIDE ACCOMPANIED BY EXTRUSION OF SULFUR DIOXIDE
Authors: Kobayashi Keiji , Mutai Kiyoshi 
Published: July 2006

Abstract
Photolysis of the title compound afforded 2,5-diarylthiophene. The mechanism involving the valence isomerization to thioketone was supported by the photolysis in n-butylamine, which gave pyrrole derivatives.
ISOMERIZATION OF TRIFLUOROACETIMIDOYL CHLORIDES AND THEIR 1,3-DIPOLAR CYCLOADDITIONS WITH ELECTRON-DEFICIENT OLEFINS
Authors: Tanaka Kiyoshi , Daikaku Hiroki , Mitsuhashi Keiryo 
Published: July 2006

Abstract
N-Arylmethyltrifluoroacetimidoyl chlorides isomerize to N-(arylmethylene)-1-chloro-2,2,2-trifluoroethylamines in the presence of triethylamine at room temperature and to the corresponding N-trifluoroethylbenzimidoyl chlorides under more drastic conditions. The reactions of the trifluoroacetimidoyl chlorides with methyl acrylate and acrylonitrile give the corresponding 1,3-dipolar cycloadducts.
THE CATALYTIC REDUCTION OF N3− TO NH3 BY THE REDUCED SPECIES OF [Fe4S4L4]2−, [Mo2Fe6S8L9]3− (L = SCH2CH2OH), AND A RELATED ANION IN H2O OR IN MeOH/THF: EVIDENCE FOR THE FORMATION OF N2H2 AND N2H4 AS INTERMEDIATES
Authors: Imasaka Yoshinobu , Tanaka Koji , Tanaka Toshio 
Published: July 2006

Abstract
The N3− ion can be reduced by [Fe4S4L4]2−, [Mo2Fe6S8L9]3− (L=SCH2CH2OH), and [Fe4S4(SPh)4]2− catalytically under the controlled potential electrolysis conditions in H2O or in MeOH/THF (1:1 v/v) to give NH3 and N2 together with H2. The formation of N2H2 and N2H4 was confirmed as intermediates in these reactions.
TOTAL SYNTHESIS OF 6-OXO-GRINDELIC ACID METHYL ESTER
Authors: Kimura Akihiko , Katsumura Shigeo , Isoe Sachihiko 
Published: July 2006

Abstract
The first synthesis of the methyl ester of 6-oxo-grindelic acid (1) from decalone derivative 2 through γ-hydroxyenone 7 was described.
ULTRASOUND-RESPONSIVE PERMEABILITY CONTROL OF BILAYER-COATED CAPSULE MEMBRANES
Authors: Okahata Yoshio , Noguchi Hiroshi 
Published: July 2006

Abstract
Permeation of NaCl from the inner aqueous phase of the bilayer-coated capsule membrane was reversibly regulated by ultrasonic waves. Activation energy data shows that the ultrasonic irradiation makes coating bilayers fluid like a liquid crystalline state and causes the increase of permeation of NaCl.
NOVEL HOST MOLECULES WHICH FORM INCLUSION COMPLEXES WITH ALCOHOLS. EXTRACTION OF ETHANOL FROM ITS AQUEOUS SOLUTION BY THE COMPLEXATION
Authors: Toda Fumio , Tanaka Koichi , Daumas Gerardo Ulibarri , Sanchez Ma Cristina 
Published: July 2006

Abstract
9,10-Dihydroxy-9,10-diphenyl-9,10-dihydroanthracene, 2,5-diarylhydroquinones, and 9-hydroxy-9-(1-propynyl)fluorene and its 2,7-dihalo-analogs were found to form inclusion complexes with various alcohols. By using the complexation, ethanol was extracted from aqueous solution of various concentration.
THE SELECTIVE BOND CLEAVAGE OF d-GLUCOSE AND d-GALACTOSE BY THE TITANIUM(IV) CHLORIDE-CATALYZED PHOTOREACTION
Authors: Sato Tadashi , Takahashi Kazuo , Ichikawa Shuji 
Published: July 2006

Abstract
Photoreaction of d-glucose and d-galactose in methanol in the presence of titanium(IV) chloride induced a selective bond cleavage at the C5–C6 position, and produced pentodialdose derivatives.