bluuebunny/crossref_metadata_2025_split huggingface dataset:
THALLIUM (III) TRIFLUOROACETATE OXIDATION OF SOME ESTERS HAVING TWO C6–C3 UNITS
Authors: Nishiyama Shigeru , Yamamura Shosuke 
Published: July 2006

Abstract
Some esters with two C6–C3 units have been oxidized with thallium (III) trifluoroacetate to afford the corresponding lactones of medium-sized rings, one of which is an 11-membered ring lactone, an 8,8′-secosteganacin-type compound.
2-ACYLCYCLOBUTANONES FROM α-CYCLOPROPYLlDENE KETONES
Authors: Huet François , Lechevallier André , Conia Jean-Marie 
Published: July 2006

Abstract
Oxaspiropentyl ketones and acetals prepared from α-cyclopropylidene ketones and acetals undergo, with lithium halides, isomerisation to 2-acylcyclobutanones and monoacetals.
FORMATION OF UNUSUAL PYRROLES BY PHOTOLYSIS OF 1-VINYL-4,5-DIHYDRO-1H-1,2,3-TRIAZOLES
Authors: Ito Masato M , Nomura Yujiro , Takeuchi Yoshito , Tomoda Shuji 
Published: July 2006

Abstract
Photolysis of 4-alkyl-5-amino-1-vinyl-4,5-dihydro-1H-1,2,3-triazoles gave not 3-alkylpyrroles but unexpected 2-alkylpyrroles in 80–83 % yields. Similarly 4,4-dimethyltriazole derivatives gave 2,2-dimethyl-2H-pyrroles in 70–74 % yields. 1-Vinylaziridines were assumed as a possible intermediate of this anomalous reaction.
AN EFFICIENT SYNTHESIS OF HOMOALLYL ALCOHOLS BY THE REACTION OF ALLYL HALIDES WITH CARBONYL COMPOUNDS IN THE PRESENCE OF METALLIC TIN
Authors: Mukaiyama Teruaki , Harada Taira 
Published: July 2006

Abstract
In the presence of metallic tin, allyl halides were found to react smoothly with carbonyl compounds under mild conditions to give the corresponding homoallyl alcohols in good yields.
DIELS–ALDER REACTIONS OF 1,2,3,6-TETRAHYDROBENZOCYCLOBUTENE-3,6-DIONES. A NEW SYNTHESIS OF [4.4.2]PROPELLANES AND A DIVERGENCE OF SITESELECTIVITY CONTROLLED BY STERIC HINDRANCE
Authors: Oda Masaji , Kanao Yoshinori 
Published: July 2006

Abstract
1,2,3,6-Tetrahydrobenzocyclobutene-3,6-diones underwent Diels–Alder reactions most preferably at the internal double bond giving [4.4.2]propellanes unless steric hindrance is not significant. The adducts with cyclic 1,3-dienes were transformed photochemically to novel strained cage molecules.
ONE-POT PHOTOCHEMICAL SYNTHESIS OF NAPHTHO[1,2-g]QUINOLINE-7,12-DIONE DERIVATIVES — A NEW ROUTE TO AZA-ANALOGUE OF BENZ[a]ANTHRACENE-7,12-DIONES
Authors: Maruyama Kazuhiro , Tai Seiji , Otsuki Tetsuo 
Published: July 2006

Abstract
Substituted naphtho[l,2-g]quinoline-7,12-diones were synthesized regioselectively by one-pot photochemical reaction of 7-bromo-6-methoxyquinoline-5,8-dione with 1,1-diarylethylenes.
PRONOUNCED CATALYTIC ACTIVITY AND SELECTIVITY OF HIGH-TEMPERATURE EVACUATED ALUMINIUM PHOSPHATE FOR THE ISOMERIZATION OF n-BUTENES
Authors: Itoh Hidenobu , Tada Akio , Tanabe Kozo 
Published: July 2006

Abstract
Aluminium phosphate evacuated at 750 °C catalyzed only the cis–trans isomerization of cis-2-butene without double bond migration, but that evacuated at 1000 °C catalyzed the double bond migration of 1-butene with cis–trans isomerization. The activity of aluminium phosphate evacuated at 750 °C for the cis–trans isomerization was at least 10 times higher than that of silica-alumina.
SYNTHESIS OF 4-AZULENEETHANAMINE DERIVATIVES FROM SODIUM GUAIAZULENIDE AND METHYLENEIMINIUM SALT
Authors: Kurokawa Shinji 
Published: July 2006

Abstract
Alkyl- and aryl-substituted 4-azuleneethanamines, non-benzenoid analogs of biological active amines, were synthesized by the reaction of sodium guaiazulenide with methyleneiminium salt. These compounds were characterized by spectral data.
ACTIVATION OF POLYHALOALKANES BY PALLADIUM CATALYST. PREPARATION OF γ-TRICHLORO KETONES BY THE PALLADIUM CATALYZED ADDITION REACTION OF BROMOTRICHLOROMETHANE AND CARBON TETRACHLORIDE TO ALLYL ALCOHOLS
Authors: Nagashima Hideo , Sato Koji , Tsuji Jiro 
Published: July 2006

Abstract
The palladium catalyzed reaction of BrCCl3 and CCl4 with allyl alcohols with terminal double bonds afforded γ-trichloro ketones. Pd(OAc)2combined with tri-o-tolylphosphine in the presence of a base gave the best results.
INFRARED SPECTRUM AND VIBRATION-ROTATION ANALYSIS OF THE ν1 BAND OF METHYL-d3 IODIDE
Authors: Matsuura Hiroatsu , Murata Hiromu 
Published: July 2006

Abstract
Infrared spectrum of the ν1 band of methyl-d3 iodide was measured by a Fourier transform spectrometer with a resolution of 0.08 cm−1. The analysis of the spectrum gave the following constants: (ν0)1 2155.437±0.006 cm−1, α1A 0.02221±0.00006 cm−1, and α1B 0.000113±0.000002 cm−1. The centrifugal distortion constants were also determined.
THE BF3-CATALYZED DECOMPOSITION OF DIAZO CARBONYL COMPOUNDS IN NITRILES. FORMATION OF ENAMIDES
Authors: Ibata Toshikazu , Yamamoto Masahiko 
Published: July 2006

Abstract
The BF3-catalyzed decomposition of α-diazoacetopheones in acetonitrile, propionitrile, or methyl thiocyanate in the presence of 1,3,5-trimethoxybenzene produced enamides (7) in good yield.
SELECTIVE THERMAL OXIDATION OF OLIGOOXYETHYLENE RESINS DERIVED FROM CHLOROMETHYLATED CROSS-LINKED POLYSTYRENE
Authors: Yanagida Shozo , Fujita Hiroshi , Okahara Mitsuo 
Published: July 2006

Abstract
Solid-state oligooxyethylene resins derived from chloromethylated cross-linked polystyrene are oxidized thermally but selectively at the benzyl carbons bound to oligooxyethylenes, giving the resins with oligooxyethylene chains and carboxylic groups (0.1–2.5 mequiv COOH/g-resin).
LUMINESCENCES BY ELECTRON IMPACT AND FRAGMENTATIONS OF PYRIDAZINE, PYRAZOLE, 2-PYRAZOLINE, HYDRAZINE, AND 1,1-DIMETHYLHYDRAZINE
Authors: Inoue Akinori , Yoshida Shuji , Ebara Nozomu 
Published: July 2006

Abstract
Fragmentations of pyridazine, pyrazole, 2-pyrazoline, hydrazine, and 1,1-dimethylhydrazine were studied by means of electron-impact luminescence. Emissions of CN and NH radicals were observed, while emission of molecular nitrogen was absent. It was concluded that the cleavage of N–N bond is important in the fragmentation of these molecules.
THE SYNTHESES OF N-FREE α-DEHYDROAMINO ACID ESTER AND N-ACETYL DEHYDRODIPEPTIDE ESTER FROM N-CARBOXY α-DEHYDROAMINO ACID ANHYDRIDE
Authors: Shin Chung-gi , Yonezawa Yasuchika , Yoshimura Juji 
Published: July 2006

Abstract
N-Carboxy α-dehydroamino acid anhydride, derived from N-benzyloxycarbonyl α-dehydroamino acid (DHA) and thionyl chloride, was found to be very useful for the synthesis of N-free DHA ester by alcoholysis and N-acetyl dehydrodipeptide ester by coupling was α-amino acid ester.
HIGHLY ENANTIOSELECTIVE MICHAEL ADDITION OF THIOLS TO 2-CYCLOHEXENONE BY USING (2S,4S)-2-(ANILINOMETHYL)-1-ETHYL-4-HYDROXYPYRRQLIPINE AS A CHIRAL CATALYST
Authors: Mukaiyama Teruaki , Ikegawa Akihiko , Suzuki Keisuke 
Published: July 2006

Abstract
Optically active 3-arylthiocyclohexanones are produced in good optical yields by treating 2-cyclohexenone with aryl thiols in the presence of (2S,4S)-2-(anilinomethyl)-1-ethyl-4-hydroxypyrrolidine as a chiral catalyst.
EMBEDDED NICKEL CATALYST IN POLYMER
Authors: Tai Akira , Imachi Yoshimi , Harada Tadao , Izumi Yoshiharu 
Published: July 2006

Abstract
A new type embedded heterogeneous catalyst having high durability was prepared. The catalyst prepared by embedding Raney nickel catalyst modified with a mixture of NaBr and tartaric acid (TA-NaBr-MRNi) in room temperature vulcanizing silicone rubber (RTV-sillicone rubber) held its initial enantioface-differentiating ability and hydrogenation activity even after 30 times of its usage.
PERFLUOROALKYLATION OF AROMATIC COMPOUNDS WITH RfI(Ph)OSO2CF3
Authors: Umemoto Teruo , Kuriu Yuriko , Shuyama Hideo 
Published: July 2006

Abstract
Perfluoroalkylation of various aromatic compounds with perfluoroalkylphenyliodonium trifluoromethanesulfonate (FITS) under mild conditions was described. The reactivity of other perfluoroalkyliodonium salts was also examined.
AGGREGATE FORMATION OF TRIS(1,10-PHENANTHROLINE)IRON(II) IONS WITH IONIC SURFACTANTS. KINETIC STUDIES OF RACEMIZATION AND DISSOCIATION OF THE COMPLEX
Authors: Tachiyashiki Satoshi , Yamatera Hideo 
Published: July 2006

Abstract
Kinetic studies of the racemization and dissociation of [Fe(phen)3]2+ in the presence of sodium alkanesulfonates (CnH2n+1SO3Na, n=10, 14) showed the formation of at least two kinds of aggregates of the complex ion with alkanesulfonate ions (1:1 and 1:8 for n=10, and 1:1 and 1:3 for n=14).
A CONVENIENT TRIFLUOROMETHYLATION OF AROMATIC HALIDES WITH SODIUM TRIFLUOROACETATE
Authors: Matsui Kiyohide , Tobita Etsuko , Ando Midori , Kondo Kiyosi 
Published: July 2006

Abstract
Regiospecific trifluoromethylation by substitution of the halogen in aromatic halides was achieved by the use of sodium trifluoroacetate and copper(I) iodide. The reaction proceeded smoothly in dipolar aprotic solvents in good to high yields.
THE STRUCTURAL STUDIES OF HERQUEINONE AND ITS DERIVATIVES.THE ABSOLUTE CONFIGURATION OF DIHYDROHERQUEINONE MONOMETHYL ETHER
Authors: Yoshioka Takamitsu , Hirata Toshifumi , Aoki Tadashi , Suga Takayuki 
Published: July 2006

Abstract
The absolute configurations at C-3 and C-4 of dihydroherqueinone monomethyl ether were determined to be R and S, respectively, by the X-ray crystallography, with relation to the previously established 2′R-configuration of herqueinone. Also, the recently proposed configuration at C-4 of herqueinone was confirmed by relating it to dihydroherqueinone monomethyl ether.
SYNTHESIS OF FUNCTIONALIZED DIAZA(2,5)PYRIDINOPHANES
Authors: Iwata Masaaki , Kuzuhara Hiroyoshi 
Published: July 2006

Abstract
A general synthetic method of N2,N(n+3)-di-p-toluenesulfonyl-(n+9)-hydroxy-(n+10)-hydroxymethyl-(n+9),(n+10)′-O-isopropylidene-2,(n+3)-diaza[m](2,5)pyridinophanes [n=5,6,7,8,9,10; m=n+4] was established by the reaction of 5′-deoxy-2′,5′-dichloro-3,4′-O-isopropylidenepyridoxine hydrochloride with N,N′-di-p-toluenesulfonyl-α,ω-alkanediamine disodium salt in N,N-dimethylformamide at 70–90 °C in fairly good yield depending on the chain length.
POLYMORPHISM OF THE CRYSTALLINE 1,1,1-TRICHLORO-2,2,2-TRIFLUOROETHANE. A NEW PLASTIC CRYSTAL
Authors: Tsukamoto Tamio , Nakamura Nobuo , Chihara Hideaki 
Published: July 2006

Abstract
DTA and Raman spectra showed that slowly cooled CF3CCl3 has two transitions from a metastable to the intermediate phase (112 K) and then to the plastic phase (145 K) on heating. The stable low temperature phase obtained by quenching the plastic phase has the transition at 140 K instead of 112 K.
REACTIONS OF PHENYLYTTERBIUM σ COMPLEX WITH CARBONYL COMPOUNDS: A NEW GRIGNARD-TYPE REAGENT HAVING UNUSUAL REACTIVITY TOWARD ESTERS AND KETONES
Authors: Fukagawa Toshihiro , Fujiwara Yuzo , Yokoo Kazuhiro , Taniguchi Hiroshi 
Published: July 2006

Abstract
Phenylytterbium iodide has been found to react with ketones, aldehydes, esters, and nitriles to give alcohols and/or ketones. The reactions with esters at low temperature give ketones as main products, and the reactivity of esters to Ph–Yb–I is higher than that of ketones in contrast to the Grignard reaction.
PENTAKISDEHYDRO[16]ANNULENO[18]ANNULENE
Authors: Nakatsuji Shin’ ichi , Akiyama Shuzo , Iyoda Masahiko , Nakagawa Masazumi 
Published: July 2006

Abstract
Pentakisdehydro[16]annuleno[18]annulene consisting of a trisdehydro[16]annulene and a trisdehydro[18]annulene has been synthesized. The 1H NMR spectrum indicates the paratropicity of 16- and diatropicity of 18-membered ring, respectively. The trisdehydro[18]annulene moiety is conformationally mobile and the 1H NMR behavior is described.
STRUCTURE OF SHINJULACTONE B, A NEW BITTER PRINCIPLE FROM AILANTHUS ALTISSIMA
Authors: Furuno Tetsuo , Naora Hirokazu , Murae Tatsushi , Hirota Hiroshi , Tsuyuki Takahiko , Takahashi Takeyoshi , Itai Akiko , Iitaka Yoichi , Matsushita Kazuhiro 
Published: July 2006

Abstract
A new bitter principle, shinjulactone B was isolated from the stem bark of Ailanthus altissima SWINGLE and the structure was established.
EFFECTS OF TEMPERATURE AND DISPERSANT ON PHOTOIRRADIATION OF p-FORMYLCINNAMIC ACID CRYSTAL
Authors: Hasegawa Masaki , Katsuki Hirokazu , Iida Yuji 
Published: July 2006

Abstract
p-Formylcinnamic acid (p-FCA) crystal dimerizes quantitatively via the crystal lattice controlled photochemical process to form 4,4′-diformyl-β-truxinic acid (p-FCA dimer). The crystalline dimer was obtained quantitatively on photoirradiation of p-FCA crystal below 35°C in aqueous dispersant and included one mole of crystal water (p-FCA dimer· H2O). In non-aqueous dispersant, the dimer was produced quantitatively below about 55°C; the amorphous dimer was produced in the range of about 55°C to 0°C, and the crystalline dimer below 0°C, the degree of crystallinity increasing with decreasing the reaction temperature. Maximal reaction rates were observed at 15°C in water and at 35°C in non-aqueous dispersants. Three kinds of dimers (crystalline p-FCA dimer·H2, and crystalline and amorphous p-FCA dimers) were interconvertible by appropriate treatments.
13C CHEMICAL SHIFTS OF SOLID POLYPEPTIDES BY CROSS POLARIZATION/MAGIC ANGLE SPINNING (CP/MAS) NMR SPECTROSCOPY: CONFORMATION-DEPENDENT 13C SHIFTS CHARACTERISTIC OF α-HELIX AND β-SHEET FORMS
Authors: Takit Toshihiko , Yamashita Shinsuke , Satoh Mitsuo , Shibata Akira , Yamashita Takura , Tabeta Ryota , Saitô Hazime 
Published: July 2006

Abstract
Conformation-dependent 13C chemical shifts of poly(l-valine), poly(l-isoleucine), and poly(lleucine) of α-helix and β-sheet forms in solid state were measured by cross polarization/magic angle spinning (CP/MAS) NMR spectroscopy. It is found that 13C shifts of Cα, Cβ and carbonyl carbons of the first two polypeptides exhibit significant conformation-dependent change, while those of poly(l-leucine) show little change.
CONVENIENT SYNTHESES OF PIPERAZINE-2,5-DIONES AND LACTAMS FROM HALOCARBOXAMIDES USING PHASE TRANSFER CATALYSTS
Authors: Okawara Tadashi , Noguchi Yoshihide , Matsuda Takashi , Furukawa Mitsuru 
Published: July 2006

Abstract
Inter- and intra-molecular N-alkylation of α-halocarboxamides and dihalocarboxamides in the presence of solid phase transfer catalyst led to the corresponding piperazine-2,5-diones (2) and lactams (4) in the yields of 64–88 and 63–99%, respectively. A one-pot synthesis of β-lactams (7) from α-methyl-α,β-dibromopropionyl chloride (5) and α-amino acid using phase transfer catalyst was also successfully achieved.
PREPARATION OF ACYL(CARBOXYLATO)NICKEL AND -PALLADIUM COMPLEXES M(COR)(OCOR’)L2 (M = Ni, Pd) AND REVERSIBLE REDUCTIVE ELIMINATION OF CARBOXYLIC ANHYDRIDES, RCOOCOR’
Authors: Komiya Sanshiro , Yamamoto Akio , Yamamoto Takakazu 
Published: July 2006

Abstract
Acyl(carboxylato)nickel(II) and -palladium(II) complexes, M(COR)(OCOR’)L2 2 are prepared by 1 : 1 reactions of MR(OCOR’)L2 1 with CO at −78°, whereas similar reactions in the presence of excess CO at room temperature afford the reductive elimination products, RCOOCOR’. Acid anhydrides add oxidatively to an Ni(0)-complex to afford a complex of the type 2.
IMPROVEMENT OF V2O5–TiO2 CATALYST FOR NOx REDUCTION WITH NH3 IN FLUE GASES
Authors: Morikawa Shigeru , Yoshida Hideto , Takahashi Kazumasa , Kurita Satoru 
Published: July 2006

Abstract
A study was made to retard the oxidation of SO2 to SO3 over V2O5–TiO2 catalysts developed for the NOx reduction in flue gases. An addition of oxide, which has small amounts of excess oxygen, to the V2O5–TiO2 was proved to be effective. Especially, the GeO2–V2O5–TiO2 revealed a high NOx conversion and a retardation for the SO3 formation.
THERMALLY REVERSIBLE FORMATION OF COBALT(III) TETRAPHENYLPORPHIN π-CATION RADICAL GENERATED FROM CHLOROTETRAPHENYLPORPHINATOCOBALT(III) IN CHLORINATED HYDROCARBONS
Authors: Yamamoto Kiyoko , Kohno Masahiro , Ohya-Nishiguchi Hiroaki 
Published: July 2006

Abstract
In the solution of chlorotetraphenylporphinatocobalt(III) (CoTPPCl) , a π-cation radical of six-coordinate Co(III)TPP is reversibly formed by thermal or light activation with a small enthalpy change.
DIRECT CONVERSION OF BENZYL ALCOHOLS INTO BENZYL SULFIDES WITH ORGANIC DISULFIDE/DIPHOSPHORUS TETRAIODIDE
Authors: Suzuki Hitomi , Sato Naofumi 
Published: July 2006

Abstract
Organic disulfides react with diphosphorus tetraiodide in hot benzene to give an orange-colored solution, in which benzyl alcohols are readily converted into the corresponding benzyl sulfides in fair to good yields.
CONFIGURATIONAL PRODUCT CONTROL IN REACTIONS OF TRANS- AND CIS-DIALKYLBIS(TERTIARY PHOSPHINE)PALLADIUM(II) WITH CARBON MONOXIDE. EVIDENCE SUPPORTING AN ALKYL MIGRATION MECHANISM IN CO INSERTION INTO Pd–C BOND
Authors: Ozawa Fumiyuki , Yamamoto Akio 
Published: July 2006

Abstract
Reactions of trans- and cis-PdR2L2 (R = Me, Et, Pr, and Bu; L = tertiary phosphine ligands) with carbon monoxide in solutions were found to give strikingly different products depending on the configurations of the dialkylpalladium complexes. The results can be explained reasonably by assuming reactions proceeding by alkyl migration mechanisms.
THE ASYMMETRIC DIELS–ALDER REACTIONS OF α,β-UNSATURATED CARBOXYLIC AMIDES DERIVED FROM (−)-PHENYLGLYCINOL AND THE ASYMMETRIC TOTAL SYNTHESIS OF (+)-FARNESIFEROL C
Authors: Mukaiyama Teruaki , Iwasawa Nobuharu 
Published: July 2006

Abstract
The asymmetric intramolecular Diels–Alder reactions of α,β-unsaturated carboxylic amides derived from (−)-phenylglycinol were studied and successfully applied to the asymmetric total synthesis of (+)-farnesiferol C.
(ALLYLTHIO)ACETATE DIANION AS A NEW AND CONVENIENT REAGENT FOR THE STEREOSELECTIVE SYNTHESIS OF (2E,4E)DIENOATES FROM ALKYL HALIDES
Authors: Tanaka Kazuhiko , Terauchi Makoto , Kaji Aritsune 
Published: July 2006

Abstract
Treatment of (allylthio)acetate with lithium diisopropylamide followed by the addition of s-butyllithium produced a new dianion which could react with a variety of alkyl halides exclusively at the allylic position. The high regioselectivity of the allylic alkylation could be realized in the case of methyl (allylthio)acetate dianion. A convenient and general method for the stereoselective synthesis of (2E,4E)dienoates from alkyl halides has been developed.
A MIMIC STUDY ON COENZYME-B12 USING ORGANOCOBALOXIMES, THE REARRANGEMENT OF 1-SUBSTITUTED-2-OXOCYCLOPENTYLMETHYL RADICAL
Authors: Tada Masaru , Miura Kyo , Okabe Masami , Seki Shigetaka , Mizukami Hideyuki 
Published: July 2006

Abstract
The radical cleavage of the carbon-cobalt bond of 1-phenyl-2-oxocyclopentylmethyl cobaloxime (1) and 1-ethoxycarbonyl-2-oxocyclopentylmethyl cobaloxime (2) gave only 3-phenylcyclohex-2-enone (7) and 3-ethoxycarbonylcyclohex-2-enone (8), respectively, by acyl migration. This rearrangement may be a reasonable mimicry of the ester migration mediated by coenzyme-B12.
[7],[9],[11],[13], AND [15]HETEROHELICENES ANNELATED WITH ALTERNANT THIOPHENE AND BENZENE RINGS. SYNTHESES AND NMR STUDIES
Authors: Yamada Koh-ichi , Ogashiwa Susumu , Tanaka Hisao , Nakagawa Hiroko , Kawazura Hiroshi 
Published: July 2006

Abstract
Syntheses of the title heterohelicenes are described and their NMR spectra showed the conspicuous phenomena reflecting the overlapping of aromatic rings.
ACID CLEAVAGE OF HUMULENE 9,10-EPOXIDE. ANOMALOUS PRODUCTS AND EFFECTS OF STRAIN ON THE REACTION COURSE
Authors: Shirahama Haruhisa , Hayano Kiyoharu , Ohtsuka Toshikazu , Osawa Eiji , Matsumoto Takeshi 
Published: July 2006

Abstract
Summary On treatment of humulene 9,10-epoxide with BF3·OEt2 in AcOH, seemingly anomalous products 6-acetoxy-7-hydroxy-2,9-humuladiene and 6-acetoxy-2,7(13),9-humulatriene were obtained together with known compounds 2,9-diacetoxy-1,5,8,8-tetramethylbicyclo[8,1,0]undec-5-ene, 9-acetoxy-1,5,8,8-tetramethyltricyclo[8,1,0,02,6] undec-4ene and -5ene. The reaction course was well explained by the strain energy of four possible intermediates expected at the first stage of the transannular reaction.
REDUCTION OF HALOBENZOIC ACIDS TO DEUTERATED BENZOIC ACIDS WITH RANEY ALLOYS IN NaOD–D2O SOLUTION
Authors: Tashiro Masashi , Nakayama Kouji , Fukata Gouki 
Published: July 2006

Abstract
Reduction of bromobenzoic acids with Raney Cu–Al alloy in 10% NaOD2O solution afforded the corresponding deuterated benzoic acids in high yields and in high isotopic purities. However, use of Raney Ni–Al alloy instead of Cu–Al alloy leads to the introduction of more than the expected number of deuterium atoms. It was also found that treatment of benzoic acid with Raney Ni–Al alloy in 10% NaOD–D2O solution gave a mixture of the deuterated benzoic acids.
THIN-LAYER CHROMATOGRAPHY AND QUANTITATIVE PHOTOACOUSTIC SPECTROMETRY. APPLICATION TO THE DETERMINATION OF NANOGRAM AMOUNTS OF COBALT,COPPER, IRON, AND NICKEL AS THEIR CHELATES WITH 1-(2-PYRIDYLAZO)-2-NAPHTHOL
Authors: Ikeda Shigero , Murakami Yoshiki , Akatsuka Kunihiko 
Published: July 2006

Abstract
A method is described for the determination of metal chelates on thin-layer chromatography plates using photoacoustic spectrometer. Nanogram amounts of Co, Cu, Fe and Ni can be determined up to (40–50) ng, respectively, with less than 5% of c.v. values. The detection limit is much improved by this method, e.g. 0.1 ng.
FACILE SYNTHESIS OF 2,3,4,6-TETRA-O-BENZYL-d-GLUCOPYRANOSYLIDENE ACETALS USING TRIMETHYLSILYL TRIFLUOROMETHANESULFONATE CATALYST
Authors: Yoshimura Juji , Horito Shigeomi , Hashimoto Hiroriobu 
Published: July 2006

Abstract
The application of acetalization of aldehydes and ketones by alkoxysilanes in the presence of trimethylsilyl trifluoromethanesulfonate catalyst to lactones and di-O-trimethylsilyl-α-diols gave readily the corresponding spiro cyclic ortho esters.
THE TOTAL SYNTHESIS OF (±)-7α-(1-HYDROXY-1-METHYLETHYL)-4aβ-METHYL-1aβ-DECAHYDROCYCLOPROPA[d]NAPHTHALENE. COMMENT TO THE STRUCTURE OF CYCLOEUDESMOL
Authors: Ando Masayoshi , Sayama Shinsei , Takase Kahei 
Published: July 2006

Abstract
(±)-7α-(1-Hydroxy-1-methylethyl)-4aβ-methyl-1aβ-decahydrocyclopropa[d]naphthalene, which was belived to be the structure of cycloeudesmol, was stereoselectively synthesized and was found to differ from cycloeudesmol.
THE CONCEPT OF “SURFACE-TRAPPED HOLE” IN n-TYPE SEMICONDUCTORS AND THE CONDITIONS FOR EFFICIENT AND STABLE PHOTOELECTROCHEMICAL CELLS
Authors: Nakato Yoshihiro , Tsumura Akira , Tsubomura Hiroshi 
Published: July 2006

Abstract
The competition between decomposition and electron transfer reactions at an n-GaP electrode under illumination was explained on the basis of the concept of the “surface-trapped hole”. It is concluded that an efficient and stable photoelectrochemical cell can be constructed by use of a redox couple having the standard redox potential slightly more negative than the redox potential of the surface-trapped hole.
THERMAL DECOMPOSITION OF 17O-LABELED t-BUTYL o-METHYLTHIO- AND o-PHENYL-THIOPEROXYBENZOATES STUDIED BY 17O NMR. THE SULFURANYL RADICAL STRUCTURE OF THE o-THIOBENZOYLOXY RADICALS
Authors: Nakanishi Waro , Jo Toshihiko , Miura Kunio , Ikeda Yoshitsugu , Sugawara Tadashi , Kawada Yuzo , Iwamura Hiizu 
Published: July 2006

Abstract
t-Butyl o-methylthio- and o-phenylthioperoxybenzoates-[C=17O] were prepared and decomposed thermally in chlorobenzene. The oxygen labels were detected by 17O NMR spectroscopy preferentially at the carbonyl oxygen of 3,1-benzoxathian-4-one and diphenyl 2,2′-dithiodibenzoate, demonstrating the bridged sulfuranyl radical structures for the o-thiobenzoyloxy radicals.
INTERSYSTEM CROSSING AND LOWEST TRIPLET STATES OF 4-CHROMANONE, CHROMONE, AND FLAVONE
Authors: Hamanoue Kumao , Nakayama Toshihiro , Miyake Takao , Teranishi Hiroshi 
Published: July 2006

Abstract
Using pico- and nanosecond spectroscopy methods, Tn←T1 absorption spectra and their build-up times have been measured for 4-chromanone, chromone, and flavone. From these results, combined with the results of a conventional flash photolysis, the electronic configuration of the lowest triplet state was discussed.