bluuebunny/crossref_metadata_2025_split huggingface dataset:
SILVER ION-ASSISTED INTRAMOLECULAR NUCLEOPHILIC ADDITION-ELIMINATION OF VINYL BROMIDES; FORMATION OF BENZOTHIOPHENES FROM 2-(o-METHYLTHIOPHENYL)VINYL BROMIDES
Authors: Sonoda Takaaki , Kobayashi Shinjiro , Taniguchi Hiroshi 
Published: July 2006

Abstract
The reactions of 1-unsubstituted and 1-methyl-2-(o-methylthiophenyl)vinyl bromides in acetic acid in the presence of silver salt gave exclusively benzothiophenes, while the corresponding 2-methoxyphenyl analogues were unreactive under similar conditions. This cyclization is considered to involve an intramolecular nucleophilic attack of the sulfur atom at the carbon atom of the double bond activated by the silver ion with the elimination of the silver bromide.
FORMATION OF FORSTERITE(2MgO·SiO2) FROM THE MIXTURE PREPARED BY ALKOXY-METHOD
Authors: Yamaguchi Osamu , Nakajima Yoshiki , Shimizu Kiyoshi 
Published: July 2006

Abstract
Forsterite(2MgO·SiO2) was formed at low temperatures by heating the mixed powders prepared by the simultaneous hydrolysis of magnesium and silicon alkoxides.
SYNTHESIS AND CHARACTERIZATION OF 1-IMIDOYLIMINOPYRIDINIUM N-YLIDES
Authors: Kakehi Akikazu , Ito Suketaka , Uchiyama Kenji , Konno Yoshiaki 
Published: July 2006

Abstract
1-Imidoyliminopyridinium N-ylides were prepared for the first time by the reaction of pyridinium N-imines with ethyl benzimidate, and their thermal and photochemical reactivities were examined.
SYNTHESIS OF POLYMERIZABLE p-STYRENE SULFINATE
Authors: Kamogawa Hiroyoshi , Hayashi Tsuyoshi , Nanasawa Masato 
Published: July 2006

Abstract
Sodium p-styrene sulfinate, a novel redox monomer, was synthesized starting with 2-bromoethylbenzene with intention of preparing a novel class of redox polymer. The monomer was found to afford soluble polymers of high molecular weights by radical polymerization.
N-ALKYLPENTAMETHYLPHOSPHORAMIDES: NOVEL CATALYSTS IN TWO-PHASE REACTIONS
Authors: Tomoi Masao , Takubo Toyokazu , Ikeda Manabu , Kakiuchi Hiroshi 
Published: July 2006

Abstract
Phosphoramides having hydrophobic groups in the molecule, e.g. N-dodecylpentamethylphosphoramide or N-benzylpentamethylphosphoramide, can be used as phase-transfer catalysts in two-phase reactions. Polymeric phosphoramides, which were prepared by the copolymerization of N-(p-vinylbenzyl)pentamethylphosphoramide with styrene, were found to catalyze phase-transfer reactions more efficiently than their monomeric analogs.
A FACILE PREPARATION Of α-NITROOLEFIN OF CARBOHYDRATES
Authors: Tachihori Yoshifusa , Takamoto Tetsuyoshi , Sudoh Rokuro 
Published: July 2006

Abstract
d-Hexopyranosides involving β-nitro alcohol were readily converted to the corresponding α-nitroolefins via sulfonates when mainly treated with ca. 1 eq. mesyl chloride-ca. 2 eq. triethylamine in CH2Cl2 or THF, whereas methyl 3-deoxy-2-O-methylsulfonyl-3-nitro-α-d-glucopyranoside derivative 10 was isolated in 80% yield when 1 eq. Et3N was used.
THE FACILE SYNTHESIS OF LACTONES
Authors: Mukaiyama Teruaki , Usui Masahiro , Saigo Kazuhiko 
Published: July 2006

Abstract
Direct lactonization of ω-hydroxy acids, HO(CH22)nCOOH with n=5, 7, 10, 11, 14, has been successfully carried out under mild conditions in good yields by the treatment with 1-methyl-2-chloropyridinium iodide in the presence of triethylamine. In the case of the acid with n=6, only lactide has been produced.
A CONVENIENT PREPARATION OF MALTOL, ETHYLMALTOL, AND PYROMECONIC ACID FROM 2-ALKYL-6-METHOXY-2H-PYRAN-3(6H)-ONES
Authors: Torii Sigeru , Tanaka Hideo , Anoda Takuo , Simizu Yasuo 
Published: July 2006

Abstract
The efficient synthesis of 2-alkyl-3-hydroxy-4H-pyran-4-ones, e. g., pyromeconic acid (6a), maltol (6b), and ethyl maltol (6c), from 2-alkyl-4,5-epoxy-6-methoxytetrahydropyran-3-ones 5 by acid-catalyzed rearrangement is described. The key precursors 5 were obtained by epoxidation of 2-alkyl-6-methoxy-2H-pyran-3(6H)-ones 4, which were synthesized by three steps starting from furfuryl alcohols 1.
ELECTROPHILIC SUBSTITUTIONS OF OLEFINIC HYDROGENS II. ACYLATION OF VINYL ETHERS AND N-VINYL AMIDES
Authors: Hojo Masaru , Masuda Ryoichi , Kokuryo Yoshitsugu , Shioda Haruyuki , Matsuo Sachio 
Published: July 2006

Abstract
Reactions of vinyl ethers, N-vinyl carboxamides and N-vinyl sulfonamides with trifluoroacetic (or trichloroacetic) anhydride occurred quite easily at room temperature to give corresponding β-trifluoro- or trichloroacetylated compounds in high yields. Reactions with a mixed anhydride, CH3COOCOCF3, gave trifluoroacetylated compounds in high yields, acetyl compounds being not produced.
NOUVEAUX HETEROCYCLES THIOPYRANNIQUES
Authors: Croisy Alain , Ricci Adolfo , Jancevska Miroslava , Jacquignon Pierre , Balucani Dante 
Published: July 2006

Abstract
The thiopyranone-3 has been condensed with arylhydrazines, orthoamino acetophenone and orthoamino benzaldehyde to give some new indoles and quinolines.
The Bthoxycarbonyl-2 derivative has given some pyrazolones. RMN and Mass Spectra are examinated.
PHOTO-ELECTROCHEMICAL BEHAVIOUR OF THE TRIS(2,2′-BIPYRIDYL) RUTHENIUM(II) ION IN ACIDIC SOLUTION
Authors: Kobayashi Shigero O , Furuta Naoko , Simamura Osamu 
Published: July 2006

Abstract
A cathodic photocurrent was observed at an SnO2 electrode immersed in an acidic solution of tris(2,2′-bipyridyl)ruthenium(II) dichloride illuminated with visible light, and the current increased in the presence of methyl viologen. The photo-potential at the electrode was found to be positive enough for water to be oxidized; in fact, chemical species produced in a cell incorporating this photochemical system were identified with oxygen and hydrogen peroxide.
THE EFFECT OF EXTERNAL MAGNETIC FIELD ON THE PHOTOCHEMICAL REACTION OF ISOQUINOLINE N-OXIDE
Authors: Hata Norisuke 
Published: July 2006

Abstract
It was found that the magnetic field affected the photochemical isomerization of isoquinoline N-oxide to lactam in ethanol to cause an interesting variation in the yield of lactam. The results appear to indicate that there occurs a remarkable enhancement of the intersystem crossing from the excited singlet state of isoquinoline N-oxide by the magnetic field of approximately 10 kG.
THE REACTION OF α-SUBSTITUTED DEOXYBENZOINS WITH HEXAMETHYLPHOSPHORIC TRIAMIDE. FORMATION OF A NOVEL CYCLIC ENAMIDOPHOSPHATE
Authors: Monson Richard S , Baraze Adina 
Published: July 2006

Abstract
The reaction of benzoin and other substituted deoxybenzoins with HMPT has been investigated. Along with modest yields of tetraphenylpyridine, the major product in all cases is 2-dimethylamino-4, 5-diphenyl-3-methyl-1-oxa-3-aza-2-phosphacyclopent-4-ene 2-oxide (5). meso-Hydrobenzoin similarly gives 2-dimethylamino-4,5-diphenyl-1,3-dioxa-2-phosphacylopentane 2-oxide (4). The mechanism of formation of 5 and the pyridine is discussed.
A NEW METHOD FOR THE SYNTHESIS OF 5′-AMINO-NUCLEOSIDES AND THEIR PHOSPHORAMIDATE DERIVATIVES
Authors: Hata Tsujiaki , Yamamoto Isamu , Sekine Mitsuo 
Published: July 2006

Abstract
The reaction of nucleoside azides with trimethylsilyl phosphites is described. By use of the reaction, amino-nucleosides were obtained in high yields. The reaction can be also applied to the synthesis of dinucleoside phosphoramidate and nucleoside cyclic phosphoramidate.
THE STRUCTURES OF TWO MAJOR INTERMEDIATES IN TRIFLUOROMETHANESULFONIC ACID-CATALYZED REARRANGEMENT OF TRICYCLO[5.2.2.02,6]UNDECANE
Authors: Inamoto Yoshiaki , Takaishi Naotake , Fujikura Yoshiaki , Aigami Koji , Tsuchihashi Kiyoshi 
Published: July 2006

Abstract
Two major intermediates of unknown structure (unknown E and D) found in trifluoromethanesulfonic acid-catalyzed rearrangement of tricyclo[5.2.2.02,6]undecane (1) to 4-homoisotwistane (4) were identified as tricyclo[5.4.0.04,8]undecane (2) and tricyclo[5.3.1.04,11]undecane (3), respectively, by independent syntheses.
STRUCTURAL STUDY OF OPTICAL RESOLUTION III. THE CRYSTAL STRUCTURE OF CIS-DICHLOROBIS(ETHYLENEDIAMINE)COBALT(III) d-α-BROMOCAMPHOR-π-SULPHONATE
Authors: Kushi Yoshihiko , Kuramoto Masahiro , Yoneda Hayami 
Published: July 2006

Abstract
The crystal structure of the title compound has been determined by X-ray analysis. It has been found that a face-to-face type close contact of the (+)589-[CoCl2(en)2]+ cation with the bromocamphor moiety of the d-BCS anion is formed in this crystal.
STEREOCHEMISTRY AND REGIOSELECTIVITY OF HALOGEN EXCHANGE REACTIONS OF vic-DIHALOALKANES OVER METAL HALIDES
Authors: Misono Makoto , Ishikawa Makoto , Yoneda Yukio 
Published: July 2006

Abstract
Stereospecific substitution reaction of halogens with retention of configuration was found in the reaction of 2,3-dibromobutanes over metal halides at 100–200°C, although rapid racemization of optically active 2,3-dibromobutane took place. A reaction mechanism which involves a bridged bromonium-ion intermediate was proposed to explain these results and the regioselectivity of the substitution of 1,2-dibromopropane.
A CONVENIENT METHOD FOR THE PREPARATION OF OLEFINS BY REDUCTIVE DEMETHOXYLATION OF ALLYL METHYL ETHERS USING TiCl4–LiAlH4
Authors: Ishikawa Hiroshi , Mukaiyama Teruaki 
Published: July 2006

Abstract
The reductive demethoxylation of allyl methyl ethers using TiCl4–LiAlH4 afforded various olefins in good yields accompanied with double bond migration.
THE REACTION OF THIOLANE WITH HYDROGEN ATOMS IN GAS PHASE
Authors: Horie Osamu , Kawamata Kazunori , Onuki Kaoru , Amano Akira 
Published: July 2006

Abstract
The title reaction was carried out in the temperature range of 300–670 K between the pressure of 5.5–11 Torr, using a discharge-flow apparatus. n-Butanethiol, n-butane, and 1-butene are the main products at room temperature. The results are explained by the ring opening reaction initiated by the H atom attack on sulfur atom. followed by the C–S bond dissociation.
NUCLEOPHILIC SUBSTITUTION REACTION VIA ONE ELECTRON TRANSFER PROCESSES. I A NEW SYNTHETIC METHOD FOR THE PREPARATION OF α,β-UNSATURATED NITRILES
Authors: Ono Noboru , Eto Hiromichi , Tamura Rui , Hayami Jun-ichi , Kaji Aritsune 
Published: July 2006

Abstract
An efficient one-pot synthesis of α,β-unsaturated nitriles consisting of the coupling reaction of α-bromonitroalkanes with the anions of ethyl α-alkylcyanoacetates followed by deethoxycarbonylation and elimination of the nitro group is described.
THE TITANIUM TETRACHLORIDE-PROMOTED REACTION OF KETENE ALKYL TRIALKYLSILYL ACETALS WITH ACETALS OR AN ORTHOFORMATE
Authors: Saigo Kazuhiko , Osaki Masaaki , Mukaiyama Teruaki 
Published: July 2006

Abstract
In the presence of TiCl4, ketene alkyl trialkylsilyl acetals reacted with acetals or an orthoformate at −78°C to afford the corresponding β-alkoxyesters or β,β-dialkoxyester in good yields, respectively.
LIQUID–LIQUID EXTRACTION OF COBALT(II) WITH POLYETHYLENEGLYCOL AND ITS DERIVATIVES
Authors: Sotobayashi Takeshi , Suzuki Toshio , Yamada Kohji 
Published: July 2006

Abstract
Polyethyleneglycol and its derivatives were found to be employed as new extracting reagents of trace amounts of Co(II) in liquid–liquid extraction. The extraction behavior of Co(II) with polyethyleneglycol alkylphenyl ether (Triton X-100) from thiocyanate solutions was studied, and the extracted chemical species was estimated to be (NH4)2Co(NCS)4(Triton X-100))2.
SYNTHESIS OF 2,15-HEXADECANEDIONE, A PRECURSOR OF MUSCONE, FROM BUTADIENE
Authors: Tsuji Jiro , Mizutani Kyoichiro , Shimizu Isao , Yamamoto Keiji 
Published: July 2006

Abstract
1-Acetoxy-2,7-octadiene obtained by the palladium catalyzed dimerization of butadiene in acetic acid was converted to 1-chloro-2,7-octadiene. Coupling of this allylic chloride with iron powder in DMF afforded 1,6,10,15-hexadecatetraene as a main product. Selective oxidation of the terminal double bonds to methyl ketones catalyzed by palladium chloride and cuprous chloride, followed by hydrogenation gave 2,15-hexadecanedione.
PHOTOSENSITIZED OXYGENATION OF 2-PHENYL-1,3-OXAZEPINE
Authors: Seshimoto Osamu , Tezuka Takahiro , Mukai Toshio 
Published: July 2006

Abstract
The dye-sensitized photooxygenation of 2-phenyl-1,3-oxazepine (1) in methylene chloride yields fragment products, 2, 3, 4, and 5. Among them, pyrrolinone (2) and butenolide (3) are assumed to originate from the 1,4-epidioxide (6), and ethylidene malonaldehyde (4) from dioxetane (10) or 1,6-epidioxide (11).
PHASE TRANSITIONS AND BROADENING OF CHLORINE NQR SPECTRUM OF 1,1,1-TRICHLORO-2-METHYL-2-PROPANOL HEMIHYDRATE
Authors: Hashimoto Masao 
Published: July 2006

Abstract
It was found that 1,1,1-trichloro-2-methyl-2-propanol hemihydrate exhibits two phase transitions at 192 K and 198 K. By quenching the compound from room temperature to 77 K, a metastable phase was obtained. The results of the dielectric and chlorine NQR measurements suggest a random orientation of molecules in the metastable phase.
DIMERIZATION OF THE TRYPTOPHYL MOIETY
Authors: Omori Yukako , Matsuda Yasuhiro , Aimoto Saburo , Shimonishi Yasutsugu , Yamamoto Masao 
Published: July 2006

Abstract
A compound isolated from solutions of N-acetyl-tryptophan methyl ester in hydrogen fluoride and trifluoracetic acid was found to be a dimer with the structure shown in Fig. 1.
3,3′-DIBROMO-4,4′,5,5′-TETRAHYDROXYBIBENZYL, A NEW BROMOPHENOL FROM THE RED ALGA, POLYSIPHONIA URCEOLATA
Authors: Kurata Kazuya , Amiya Takashi , Nakano Naomi 
Published: July 2006

Abstract
The new bromophenol, 3,3′-dibromo-4,4′,5,5′-tetrahydroxybibenzyl has been isolated from the red alga, Polysiphonia urceolata, and identified. Besides this phenol, three bromophenols have been obtained and shown to be 3,5-dibromo-4-hydroxybenzyl methyl ether, 3-bromo-4,5-dihydroxybenzyl methyl ether and 3-bromo-4,5-dihydroxybenzaldehyde, which were previously reported in the literature.
FORMATION OF BENZ[cd]INDAZOLE BY LOW-TEMPERATURE PHOTOLYSIS OF 1,8-DIAZIDONAPHTHALENE IN A RIGID MATRIX
Authors: Yabe Akira , Honda Koichi , Oikawa Setsuko , Tsuda Minoru 
Published: July 2006

Abstract
The absorption spectrum of benz[cd]indazole is observed by low-temperature matrix photolysis of 1,8-diazidonaphthalene and is identified tentatively on the basis of its chemical behavior and the prediction of the spectroscopic data by SCF MO-CI calculations.
THE EFFICIENT CATALYSIS OF THE AUTOXIDATION OF THIOPHENOL BY A TETRADEHYDROCORRINATOCOBALT(III) COMPLEX
Authors: Murakami Yukito , Aoyama Yasuhiro , Nakanishi Shigenori 
Published: July 2006

Abstract
The oxidation of thiophenol was effectively catalyzed by dicyano-8,12-diethyl-1,2,3,7,13,17,18,19-octamethyltetradehydrocorrinatocobalt(III) ((CN)2Co(III)TDHC) in methanol containing small amounts of acetic acid and sodium cyanide at room temperature. The reaction was consistent with the sequence: (1) (CN)2Co(III)TDHC is reduced to Co(I) with thiophenol without participation of molecular oxygen; (2) the Co(I) species is oxidized to Co(II)TDHC by oxygen and acid; (3) the Co(II) species is oxidized to (CN)2Co(III)TDHC by the cooperation of oxygen and cyanide ion. The Co(III) species was repeatedly used at a rate of 3–5 cycle per second as an electron transport mediator.
AN INITIAL INTERMEDIATE ON PULSED ELECTRON IRRADIATION OF AQUEOUS SOLUTIONS OF MERCURIC IODIDE
Authors: Fujita Shin-ichi , Horii Hideo , Mori Toshiaki , Taniguchi Setsuo 
Published: July 2006

Abstract
HgI2 was found to react rapidly with eaq− producing initially a very short-lived intermediate with an absorption maximum at 470 nm. It decays via first order kinetics with a half-life of 1 μs to form another transient, HgI, absorbing at 360 nm. The first intermediate is proposed to be an eaq− or an H atom adduct.
GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY UTILIZING SELECTIVE ADSORPTION OF METAL IONS ONTO TUNGSTEN WIRE IN. AQUEOUS SOLUTIONS
Authors: Hoshino Yoshio , Utsunomiya Taizo , Fukui Keitarou 
Published: July 2006

Abstract
The graphite furnace atomic absorption spectrometry (AAS) is improved by utilizing tungsten wire as an adsorbing material. This method has 20 to 50 times higher sensitivity compared to the conventional aliquot-sampling flameless AAS. Interferences of large amounts of coexisting alkali salts can be effectively eliminated.
PALLADIUM POLYPYRAZOLYLBORATE COMPLEXES CONTAINING A Pd–C BOND
Authors: Onishi Masayoshi , Ohama Yushichiro , Sugimura Koji , Hiraki Katsuma 
Published: July 2006

Abstract
(N,N-Dimethylbenzylamine,2-C,N)(BPz4)Pd(II) (Pz=1-pyrazolyl), (2-phenylpyridine,2′-C,N)(BPz4)Pd(II), (azobenzene,2-C,N)(BPz4)Pd(II), [benzo(h)quinoline,2-C,N](BPz4)Pd(II), and (N,N-dimethylbenzylamine, 2-C,N)(HBPz3)Pd(II) were prepared. Pyrazolyl groups of these complexes were found to show a fluxional behavior on the basis of 1H-NMR spectra.
CONFORMATION OF COORDINATED AMINO ACIDS. II. LONG-RANGE SPIN–SPIN COUPLING IN HISTIDINE AND HINDERED INTERNAL ROTATION OF IMIDAZOLE GROUP IN PENTAMMINE(l-HISTIDINE)COBALT(III) ION
Authors: Sakaguchi Ushio , Taura Toshiaki , Yoneda Hayami 
Published: July 2006

Abstract
It is found that in the pentammine(l-histidine)cobalt(III) ion, the imidazole C(5) proton is coupled to only one of the methylene protons with 4JHH=0.9 Hz and the internal rotation of the imidazole ring around the Cβ–Cγ bond is hindered presumably due to an intramolecular hydrogen bonding.
MAGNETIC FIELD EFFECT ON THE EXCIPLEX FLUORESCENCE OF POLY-N-VINYLCARBAZOLE
Authors: Okamoto Ken-ichi , Itaya Akira , Kusabayashi Shigekazu 
Published: July 2006

Abstract
Magnetic fields were found to increase the prompt exciplex fluorescences in intensity in poly-N-vinylcarbazole films doped with dimethylterephthalate and N,N,N;N′-tetramethyl-p-phenylenediamine by up to 2 % at 500 G. This effect was independent of the intensity and the wavelength of the exciting light, the emission-wavelength, and applied electric fields, although slightly dependent on temperature. This effect was not observed for the exciplex fluorescences in solution.
AN EFFICIENT METHOD FOR THE PREPARATION OF ACYLSILANE AND α-HALOACYLSILANE
Authors: Kuwajima Isao , Abe Toru , Minami Naoki 
Published: July 2006

Abstract
On treating 1,1-bis(trimethylsilyl)alkan-1-ol with t-butyl hypochlorite, the corresponding acylsilane is obtained in good yield, while the reaction of the alcohol with NBS, in contrary, affords α-bromoacylsilane exclusively.
A NEW SYNTHETIC METHOD OF BIVALENT Rh(II) COMPLEX USING PHOSPHINATED POLYSTYRENE AND ITS CATALYTIC ACTIVITY FOR OLEFIN HYDROGENATION
Authors: Kaneda Kiyotomi , Terasawa Masami , Imanaka Toshinobu , Teranishi Shiichiro 
Published: July 2006

Abstract
A paramagnetic bivalent rhodium complex was selectively formed by the reaction of phosphinated polystyrene with RhCl3·3H2O in ethanol. The characterization of the rhodium complex was carried out by the use of IR, ESR, and ESCA spectrometers. This complex was active for hydrogenation of olefins. The remarkable features of the hydrogenation are described.
PHOTOCHEMISTRY OF 3-OXIDOPYRIDAZINIUM BETAINES ISOLATION AND REACTION OF NEW FUSED DIAZIRIDINES
Authors: Maki Yoshifumi , Kawamura Masao , Okamoto Hisanori , Suzuki Mikio , Kaji Kenji 
Published: July 2006

Abstract
Irradiation of 3-oxidopyridazinium betaines (4) and (9) in acetonitrile gave fused diaziridines (5) and (10) which are stable enough to isolate. The amido bond of (5) underwent alcoholysis and aminolysis with ease. Thus, apparent phototranspositions of (4) and (9) to pyridazinones (6) and (11) in water were proved facile hydrolysis of the amide bonds of the intermediates (5) and (10).
CYCLIZATION OF POLYENES XXVII. SYNTHESIS OF OXOCRINOL, dl-CAULERPOL, AND dl-CRINITOL
Authors: Kato Tadahiro , Takayanagi Hisao , Uyehara Tadao , Kitahara Yoshio 
Published: July 2006

Abstract
Novel terpene alcohols, oxocrinol (1a), caulerpol (3a), and crinitol (2a), isolated from marine algae, were synthesized by the alkylation of lithium salt of benzenesulfonyl derivatives, 5, 6, and 11 (R = THP; X = SO2Ph) followed by reductive cleavage of SO2Ph and the protecting groups. The present study confirms unequivocally the proposed structures of oxocrinol, caulerpol, and crinitol, respectively.
OXIDATION OF D:B-FRIEDO-OLEAN-5(10)-ENE. A COMMENT ON THE STRUCTURE OF “ALNUS-5(10)-EN-1-ONE” FROM EUPHORBIA NERIFOLIA
Authors: Akiyama Eri , Ogawa Keiichiro , Moriyama Yoshihiko , Tsuyuki Takahiko , Takahashi Takeyoshi 
Published: July 2006

Abstract
The Ratcliffe oxidation of D:B-friedo-olean-5(10)-ene (2) gave D:B-friedo-olean-5(10)-en-1-one (1), D:B-friedo-olean-5(10)-en-6-one (3), and D:B-friedo-olean-5(10)-ene-1,6-dione (4). The spectral data of the enone (1) are not identical with the corresponding values reported for a triterpene ketone “alnus-5(10)-en-1-one” isolated from Euphorbia nerifolia, indicating that the structure of this natural triterpene must be revised.
COMPETITIVE PHOTOSENSITIZED OXIDATION AT TiO2 PHOTOANODE
Authors: Inoue Tooru , Watanabe Tadashi , Fujishima Akira , Honda Kenichi 
Published: July 2006

Abstract
The rotating ring-disk electrode (RRDE) technique has been applied to the study of photosensitized oxidation of various redox agents in competition with the oxidation of water on a TiO2 photoanode. The results are discussed referring to the standard redox potentials of the reducing agents.
BASE-INDUCED REARRANGEMENT AND ELIMINATION OF 2-HALO-SUBSTITUTED 1-AMINOETHANE-1,1-DIPHOSPHONIC ACIDS
Authors: Fukuda Masahiro , Okamoto Yoshiki , Sakurai Hiroshi 
Published: July 2006

Abstract
A base-induced rearrangement involving a 1,2-shift of a phosphono group from carbon to carbon was found in 2-halo-substituted 1-aminoethane-1-1-diphosphonic acids. In 2,2-dichloro-substituted 1-aminoethane-1,1-diphosphonic acid, each of the geminal phosphono groups underwent a 1,2-shift and an elimination, respectively, to give phosphonoacetic acid.
REACTIONS OF THIOL ESTERS WITH HALOGENS AND SOME N-HALO AND O-HALO COMPOUNDS
Authors: Minato Hiroshi , Takeda Kazuyuki , Miura Takashi , Kobayashi Michio 
Published: July 2006

Abstract
S-Phenyl thioacetate (1) quantitatively reacted with 1/2 mole of bromine (or chlorine), yielding acetyl bromide (or chloride) and phenyl disulfide. With iodine, 1 formed a complex, which reacted with an alcohol (MeOH, Me3CCH2OH, PhCH2OH), forming the corresponding ester; a catalytic amount of iodine was sufficient for this transesterification. 1 reacted quantitatively with 1-chlorobenzotriazole. The reaction of 1 with t-butyl hypochlorite yielded t-butyl acetate (70%) and acetyl chloride(30%).
CHLORINATION OF PHENYLTHIOCYCLOPROPANES AND PHENYLSULFINYLCYCLOPROPANES WITH CHLORINATING AGENTS: PREPARATION OF 1-CHLORO-1-(PHENYLTHIO)CYCLOPROPANES AND 1-CHLORO-1-(PHENYLSULFINYL)CYCLOPROPANES
Authors: Masuda Toshiaki , Furukawa Naomichi , Oae Shigeru 
Published: July 2006

Abstract
1-Chloro-1-(phenylthio)cyclopropanes and 1-chloro-1-(phenylsulfinyl)cyclopropanes are readily prepared by the direct chlorination of phenylthiocyclopropanes or phenylsulfinylcyclopropanes with various chlorinating agents.
A TRANSIENT FORMATION OF N-SUBSTITUTED ISOINDOLE BY MEANS OF PHOTOCHEMICAL INTRAMOLECULAR HYDROGEN ABSTRACTION
Authors: Maruyama Kazuhiro , Kozuka Tadashi , Otsuki Tetsuo , Naruta Yoshinori 
Published: July 2006

Abstract
Isoindole derivative 2 was formed transiently by means of intramolecular hydrogen abstraction of 1. The intermediacy of 2 was confirmed by the good yields of Diels-Alder type adducts of it with dienophiles.
ASYMMETRIC SYNTHESIS BASED ON (Z)-(2R,3S)-6-BENZYLIDENE-3,4-DIMETHYL-5,7-DIOXO-2-PHENYLPERHYDRO-1,4-OXAZEPINE. SYNTHESIS OF OPTICALLY ACTIVE 3-SUBSTITUTED 3-PHENYLPROPIONIC ACIDS
Authors: Mukaiyama Teruaki , Takeda Takeshi , Osaki Masaaki 
Published: July 2006

Abstract
(Z)-(2R,3S)-6-Benzylidene-3,4-dimethyl-5,7-dioxo-2-phenylperhydro-1,4-oxazepine (I) was prepared in good yield from α-ethoxycarbonylcinnamic acid and l-ephedrine hydrochloride by the use of 2-chloro-1-methylpyridinium tosylate as a coupling reagent. The conjugate addition of n-butylmagnesium bromide to (I) in the presence of nickel chloride, followed by hydrolysis and decarboxylation gave highly enantiomerically pure (99%) 3-phenylheptanoic acid in high yield (92%).