bluuebunny/crossref_metadata_2025_split huggingface dataset:
PHOTOLYSIS OF 1-NITROPROPANE IN GAS PHASE
Authors: Khan Khurshid A 
Published: July 2006

Abstract
Primary processes in photolysis of 1-nitropropane in gas phase are analogous to those of nitroethane and 2-nitropropane. Ethylene, propylene and methyl nitrite are the major photolysis products,while minor products are methane, methyl nitrate, ethylene oxide, ethyl nitrite, propyl nitrite, formaldehyde, propionaldehyde, water, nitric oxide and nitrogen dioxide. Quantum yields of formation of photoproducts ethylene and propylene at 22°C are 0.074 and 0.042; and at 56°C these are 0.039 and 0.01. A mechanism of the photolysis is suggested.
A NOVEL DECARBOXYLATIVE CONDENSATION OF β-KETO ACIDS WITH 2-CYCLOHEXEN-1-ONE
Authors: Yasuda Michiko 
Published: July 2006

Abstract
In the presence of aniline catalyst, acetoacetic acid(I) reacted smoothly with 2-cyclohexen-1-one(II) to give 3-acetonylcyclohexan-1-one(III) at room temperature, with evolution of carbon dioxide. Similarly the reaction between 2-oxocyclohexane-1-carboxylic acid(IV) and II gave the analogous decarboxylative condensation product, bicyclohexyl-2,3′-dione(V).
SYNTHETIC STUDIES OF LAURENCIN AND RELATED COMPOUNDS. II THE SYNTHESIS OF CIS-2-ETHYL-8-FORMYL-7,8-DIHYDRO-2H-OXOCIN-3(4H)-ONE 3-ETHYLENE ACETAL
Authors: Masamune Tadashi , Matsue Hajime 
Published: July 2006

Abstract
The synthesis of the titled hydrooxocinone (2) is described. Hydride reduction of a mixture of methyl 5-ethyl-2,5-dihydro-2-furoates (3) followed by ozonization afforded a dialdehyde mixture, which was submitted to the Robinson-Schöpf condensation to give, after acetylation, three 9-aza-3-oxabicyclo[3. 3 .1]nonanones (5 ∼ 7). cis-Bicyclononanone (5) was further transformed by a modification of the Paquette procedure (5 → 8 → 9 → 10a → 11) to give cis-2-ethyl-8-hydroxymethyl-7, 8-dihydro-2H oxocin-3 (4H)-one (11), which was converted smoothly into the aldehyde (2), one of the most important intermediates for synthesis of laurencin (1).
OXIDATION OF IRON IN NITRIC OXIDE
Authors: Takasu Yoshio , Maru Shun-ichi , Matsuda Yoshiharu 
Published: July 2006

Abstract
Oxidation of iron plates in nitric oxide was examined. The oxidation rate was higher than that in oxygen in a certain temperature range, 450–580°C, however, it had a minimum at 550°C in regard to its temperature dependencies. The scales formed in nitric oxide was found to be consisted of only Fe3O4.
FIVE NEW ALKALOIDS FROM DAPHNIPHYLLUM GRACILE GAGE
Authors: Yamamura Shosuke , Lamberton J A , Irikawa Hajime , Okumura Yasuaki , Hirata Yoshimasa 
Published: July 2006

Abstract
Five new alkaloids have been isolated from the plant Daphniphyllum gracile Gage, and their structures also been elucidated on the basis of their spectral and chemical evidences. Particularly, daphnigraciline methiodide (VI) was directly converted into yuzurine methiodide (VII). Furthermore, application of 13C NMR spectra plays an important role in the structural elucidation.
HYDROGENATION OF α,β-UNSATURATED ALDEHYDE TO UNSATURATED ALCOHOL CATALYZED BY RHODIUM COMPLEX
Authors: Meguro Shun-ichi , Mizoroki Tsutomu , Ozaki Atsumu 
Published: July 2006

Abstract
α-Methyl-cinnamaldehyde, cinnamaldehyde, and croton aldehyde are hydrogenated to the corresponding unsaturated alcohols with a fairly high selectivity by use of RhCl3·3H2O or Rh2(CO)4Cl2 catalyst in tertiary amine-benzene solution under an oxo-reaction condition. A catalytic amount of triphenylphosphine to this catalyst system substantially retards the hydrogenation of –CHO giving saturated aldehyde.
THE ANOMALOUS ELECTRO-OPTIC EFFECT IN THE NEMATIC STATE OF 4-PENTYLOXYBENZYLIDENE-4-HEPTYLANILINE
Authors: Sakagami Sakumitsu , Takase Akira , Nakamizo Minoru 
Published: July 2006

Abstract
The electro-optic behavior in the nematic state of 4-pentyloxy-benzylidene-4-heptylaniline(PBHA) is observed under the application of external DC electric field. The domain patterns can be observed only at several degrees below the isotropic-nematic transition temperature.
PALLADIUM(0) CATALYSED SYNTHESES OF KETONES FROM ACYL HALIDES AND ORGANOMERCURY(II) COMPOUNDS
Authors: Takagi Kentaro , Okamoto Tadashi , Sakakibara Yasumasa , Ohno Atsuyoshi , Oka Shinzaburo , Hayama Naomi 
Published: July 2006

Abstract
Convenient syntheses of various ketones from acyl halides and organomercury(II) compounds have been achieved by the aid of catalytic amounts of tetrakis(triphenylphosphine)palladium in hexamethylphosphoric triamide. Plausible reaction path is proposed.
CONFORMATIONAL ANALYSIS OF QUATERNARY PROTOBERBERINE ALKALOIDS BY CARBON-13 NMR SPECTROSCOPY
Authors: Yoshikawa Ken-ichi , Morishima Isao , Kunitomo Jun-ichi , Ju-Ichi Motoharu , Yoshida Yukari 
Published: July 2006

Abstract
Carbon-13 NMR spectra of quaternary protoberberine alkaloids were measured and their preferential conformation was concluded by comparison of the chemical shift.
SELECTIVE ASYMMETRIC REDUCTION OF α,β-UNSATURATED KETONES VIA HYDROSILYLATION CATALYZED BY RHODIUM(I) COMPLEXES WITH CHIRAL PHOSPHINE LIGANDS
Authors: Ojima Iwao , Kogure Tetsuo , Nagai Yoichiro 
Published: July 2006

Abstract
Selective asymmetric reductions of carbonyl functionalities in α,β-unsaturated carbonyl compounds, such as β-ionone, 2-methylcyclohexenone and mesityl oxide, were successfully carried out using dihydrosilane-chiral rhodium(I) complex catalyst combinations.
LIQUID PHASE CATALYTIC OXIDATION OF NITRIC OXIDE WITH NITRIC ACID
Authors: Osa Tetsuo , Fujieda Shigeaki , Abe Yasuhiko 
Published: July 2006

Abstract
Catalytic oxidation of nitric oxide with nitric acid was carried out in the presence of various metal salts. Copper, iron, cobalt and nickel ions had catalytic activity. The influences of temperature and contact time were examined. The possibility of the application to the pretreatment for the removal of nitrogen oxides was discussed.
CATALYTIC PROPERTIES OF A Cu(II) COMPLEX WITH A MODIFIED CYCLODEXTRIN
Authors: Matsui Yoshihisa , Yokoi Toshio , Mochida Kazuo 
Published: July 2006

Abstract
A 1:2 complex between Cu(II) and mono-(6-β-aminoethylamino-6-deoxy)-β-cyclodextrin significantly accelerates the oxidation of furoin at pH 10.5. The existence of two cyclodextrin cavities in the complex molecule may contribute to the remarkable rate acceleration.
SYNTHETIC CONTROL BASED ON 2-HALOPYRIDINIUM SALTS I. THE PREPARATION OF (R)- AND (S)-2-CHLORO-1-(1-CYCLOHEXYLETHYL)-3-ETHYL-6-METHYLPYRIDINIUM FLUOROBORATE
Authors: Shiono Manzo , Shibanuma Tadao , Mukaiyama Teruaki 
Published: July 2006

Abstract
Optically active (R)- and (S)-2-chloro-1-(1-cyclohexylethyl)-3-ethyl-6-methylpyridinium fluoroborate were prepared by a new and versatile method.
PHOTOCHEMICAL REARRANGEMENT OF 1-METHOXYTRIPTYCENE. AN EFFICIENT RADICAL FRAGMENTATION OF A METHOXYCARBENE
Authors: Iwamura Hiizu , Tukada Hideyuki 
Published: July 2006

Abstract
Irradiation of 1-methoxytriptycene 1(X = OCH3) in alcohols gives 2-(9-fluorenyl)benzaldehyde acetals 3 in good yield, showing the formation of 2-(9-fluorenyl)phenylmethoxycarbene 2(X = OCH3). In cyclohexane the expected internal adduct 4 is not obtained, but the photoproduct is 2-(9-fluorenyl)benzaldehyde 5. A novel homolysis of the O–CH3 bond in less electrophilic methoxycarbene 2 has been demonstrated.
ISOLATION OF ENAMMONIUM SALT AND ITS REARRANGEMENT TO THE CORRESPONDING IMINIUM SALT
Authors: Matsushita Hajime , Tsujino Yasuko , Noguchi Masao , Yoshikawa Sadao 
Published: July 2006

Abstract
1-(β-Methylstyryl)-2-methylpiperidinium chloride was isolated and characterized. This is the first case of the isolation of the enammonium salt. The enammonium salt was found to change easily to the corresponding iminium salt at room temperature.
A GENERAL SYNTHESIS OF α,β-UNSATURATED α-AMINO ACID ETHYL ESTERS
Authors: Shin Chung-gi , Yonezawa Yasuchika , Yoshimura Juji 
Published: July 2006

Abstract
The general synthesis of ethyl 2-amino-2-alkenoate by reduction of ethyl 2-azido-2-alkenoate, derived from ethyl 2-alkenoate by four steps, with aluminum-amalgam is described.
13C-NMR SPECTRA OF N-BENZYLIDENEANILINES. EVIDENCE FOR DELOCALIZATION OF N-LONE-PAIR ELECTRONS TO ANILINE BENZENE RING
Authors: Yoshida Masato , Minato Hiroshi , Kobayashi Michio 
Published: July 2006

Abstract
Several N-benzylideneanilines were synthesized which possess anilino benzene rings rotated out of the Ar–C=N plane by various degrees due to steric hindrance. Their 13C-NMR spectra indicated that the N lone pair electrons are delocalized to ring A especially in the compounds in which ring A is forced to rotate out of the molecular plane.
REACTIONS OF DIPHENYLCYCLOPROPENONE WITH N-SULFINYLAMINES IN THE PRESENCE OF NICKEL TETRACARBONYL
Authors: Baba Akio , Ohshiro Yoshiki , Agawa Toshio 
Published: July 2006

Abstract
The reactions of diphenylcyclopropenone with N-sulfinylanilines in the presence of nickel tetracarbonyl gave pyrrolines, 1,3,4-triphenylpyrroline-2,5-dione (IIIa) and 1-p-tolyl-3,4-diphenylpyrroline-2,5-dione (IIIb). In these reactions, exchanges of C=O for S=O were observed. On the other hand, the reaction with N-sulfinylcyclohexylamine gave a 1:1 cycloadduct, 2-cyclohexyl-4,5-diphenyl-3-isothiazolone-1-oxide (IVc) in 36% yield without an exchange.
REACTIONS OF N-BROMO DERIVATIVES OF 2-IMINOBENZOTHIAZOLINES WITH THEIR N-GRIGNARD-TYPE REAGENTS
Authors: Akiba Kin-ya , Ishikawa Kiyofumi , Inamoto Naoki 
Published: July 2006

Abstract
3-(3′-Methylbenzothiazolinylideneamino)-4-methyl-1,2,4-benzothiadiazine, the ring-enlarged product, was obtained in 67% yield in the reaction of 2-bromoimino-3-methylbenzothiazoline with N-Grignard-type reagent of 2-imino-3-methylbenzothiazoline. On the other hand, bis[o-(N-phenylcyanamino)phenyl] disulfide was obtained in 65–87% yield in the reaction of 3-susbtituted 2-bromoiminobenzothiazoline with N-Grignard-type reagent of 2-imino-3-phenylbenzothiazoline which proceeds via the oxidation of the thiolate with the bromide, the former being produced by ring-opening equilibrium of the N-Grignard-type reagent.
A CONVENIENT METHOD FOR THE PREPARATION OF SYMMETRICAL POLYOLEFINS. —SYNTHESIS OF β-CAROTENE—
Authors: Ishida Akihiko , Mukaiyama Teruaki 
Published: July 2006

Abstract
Various carbonyl compounds undergo the reductive dimerization to produce symmetrical olefins in high yields on treatment with low valent titanium compounds, formed in situ from TiCl4 and LiAlH4, in the presence of a tertiary amine such as 1,8-bis(dimethylamino)-naphthalene or tri-n-butylamine. This method is successfully applied to the direct synthesis of β-carotene (6) from retinal (5).
THERMAL 1,6-ADDITION OF THE CHARGE–TRANSFER COMPLEXES OF 7,7,8,8-TETRACYANOQUINODIMETHAN-METHOXYTOLUENE SYSTEMS
Authors: Ohashi Mamoru , Nakayama Noboru , Yamasaki Kazuyuki 
Published: July 2006

Abstract
Treatment of TCNQ with o-, m-, and p-methoxytoluene gave the corresponding 1,6-addition products similar to those obtained from the photochemical addition of toluene to TCNQ but different from those obtained from the thermal addition of o-cresol to TCNQ. The reaction was accelerated in the presence of a proton donor, suggesting the participation of a proton-transfer step.
FORMIC ACID REDUCTION XXV. A SELECTIVE REDUCTION OF CARBON–CARBON DOUBLE BONDS CONJUGATED WITH NITRO, CYANO, OR SULFONYL GROUP
Authors: Nanjo Katsumi , Suzuki Kunio , Sekiya Minoru 
Published: July 2006

Abstract
It has been found that the carbon–carbon double bonds conjugated with nitro, cyano, or sulfonyl group were selectively reduced by heating with the azeotrope, composed of formic acid and triethylamine, in N,N-dimethylformamide.
PREPARATION OF ORGANOMETALLIC COBALT(III)-SCHIFF-BASE COMPLEXES CONTAINING KETONE OR NITROMETHANE
Authors: Fujii Yuki , Yoshizawa Tadashi 
Published: July 2006

Abstract
A series of new mixed cobalt(III)-Schiff-base complexes with the general formula of [Co(acac2en)(L)(H2O)], where L = monoanion of acetone, methylethylketone, acetophenone, or nitromethane, have been prepared from [Co(acac2en)] and L by air oxidation. The organic ligand, L, has been found to coordinate to cobalt(III) ion with its active methylene group.
CYCLIZATION OF POLYENES XX, BROMO ETHERIFICATION OF UNSATURATED ALCOHOLS AND KETONES
Authors: Kato Tadahiro , Ichinose Isao , Hosogai Takeo , Kitahara Yoshio 
Published: July 2006

Abstract
By the reaction of 2,4,4,6-tetrabromocyclohexadienone (I, TBCO) with unsaturated alcohols (III and VI) and ketones (IX), it was found that the corresponding bromo ethers (IV and VIII) and (X) were obtainable in moderate yields.
DEALKYLATION OF ALKYL ARYL ETHERS BY NITRITE ION
Authors: Sakai Tamio , Yasuoka Nobuhisa , Minato Hiroshi , Kobayashi Michio 
Published: July 2006

Abstract
When an alkyl aryl ether possessing an electron-withdrawing substituent at its para position was heated with sodium nitrite in HMPA, it was dealkylated and the corresponding phenol was formed. This novel reaction was studied with various alkyl aryl ethers using oxygen-18 and an optically-active compound, and this ether cleavage was found to proceed by an SN2 attack of nitrite on the alkyl carbon atom.
MICROWAVE SPECTRA OF cis- AND skew-IMETHYLVINYLSILANE
Authors: Hayashi Michiro , Imachi Misako 
Published: July 2006

Abstract
Microwave spectra of cis and skew isomers of methylvinylsilane were studied in relation to their molecular structures, dipole moments and barriers to internal rotation of the methyl group. The results were compared with those of cis and skew isomers of butene-1.
THE VIBRATIONAL SPECTRA AND ROTATIONAL ISOMERISM OF ETHYL METHYL SELENIDE AND METHYL i-PROPYL SELENIDE
Authors: Ohno Keiichi , Hirokawa Takeshi , Aono Seiro , Murata Hiromu 
Published: July 2006

Abstract
The vibrational spectra of dimethyl selenide, ethyl methyl selenide, and methyl i-propyl selenide were measured in the gaseous, liquid, and solid states. The rotational isomers about the C–Se bond were confirmed to exist for ethyl methyl selenide and methyl i-propyl selenide.
REDUCTIVE CYCLIZATION OF NONCONJUGATED ACETYLENIC KETONES TO 2- METHYLENECYCLOPENANOLS
Authors: shono Tatsuya , Nishiguchi Ikuzo , Omizu Hiroshi 
Published: July 2006

Abstract
Electroreduction of series of γ-ethynl ketones in dimethylformamide gave the cyclization products, 2-methylenecyclopentanols, as the sole product in excellent yeilds. furthermore, this electrochemical techniqe was applied to a new synthesis of bicyclic alcohols with an exocyclic double bond adjacent to a bridgehed hydroxy group.
α-ALKYLATION AND α-ARYLATION OF CARBONYL GROUPS: NICKEL-PHOSPHINE COMPLEX-CATALYZED GRIGNARD COUPLING OF vic-BROMOTRIMETHYLSILOXYALKENES
Authors: Tamao Kohei , Zembayashi Michio , Kumada Makoto 
Published: July 2006

Abstract
In the presence of [Ni(dppp)Cl2] as a catalyst, vic-bromotrimethylsiloxyalkenes (1)couple with Grignard reagents to produce alkylated and arylated silyl enol ethers, or, after acid hydrolysis, the corresponding α-alkylated and α-arylated carbonyl compounds. In these reactions, 1 can be regarded as an enolonium equivalent.
AN ANOMALISM OF THE ELECTRIC FIELD GRADIENT AROUND IRON NUCLEUS OBSERVED IN POLYCHLORINATED FERROCENES
Authors: Motoyama Izumi , Shimojima Noriko , Iijima Sei-ichiro , Sano Hirotoshi 
Published: July 2006

Abstract
An anomalously large value of the quadrupole splitting has been observed in the 57Fe Mössbauer resonance spectra of octa- and decachloroferrocenes and discussed in terms of electronic and steric influence of the substituent on the Mössbauer parameters.
REACTIONS OF 2,2,2-TRIFLUOROETHOXY- AND 2 , 2,2-TRIFLUOROETHYLTHIOBENZENE WITH LITHIUM DIALKYLAMIDES. THE FORMATION OF PHENYLTHIOYNAMINES
Authors: Nakai Takeshi , Tanaka Kiyoshi , Ishikawa Nobuo 
Published: July 2006

Abstract
Reactions of 2,2,2-trifluoroethoxy-(2) and 2,2,2-trifluoroethylthiobenzene (3) with excess lithium dialkylamides afforded the difluorovinyl ether (4) and the phenylthioynamines (5) , respectively. Thus the latter reaction provides a convenient method for preparing these particular ynamines. Such striking difference in reaction course between 2 and 3 is discussed in terms of the relative stability of carbanions involved.
REACTION OF DIAZOKETONES IN THE PRESENCE OF METAL CHELATES. REACTION WITH β-DIKETONES
Authors: Ibata Toshikazu , Hamaguchi Masashi , Nishigaki Hideo 
Published: July 2006

Abstract
Copper chelate catalyzed decomposition of substituted α-diazoacetophenones and ethyl diazoacetate in the presence of dibenzoylmethane and benzoylacetone gave two types of products; one was that of formal insertion product of ketocarbene into C–H bond, and the other was into C–CO bond of β-diketone. These products were explained by the cyclopropanation of ketocarbene with C=C double bond of enol form of β-diketone followed by ring opening and proton shift.
EQUILIBRIUM AND KINETIC STUDIES OF THE REACTION OF N-2-HYDROXYETHYLETHYLENEDIAMINE-N,N′,N′-TRIACETATOAQUACHROMIUM(III) WITH AZIDE ION
Authors: Ogino Hiroshi , Shimura Makoto , Tanaka Nobuyuki 
Published: July 2006

Abstract
The equilibrium constant (k) and the rate constants (kf and kb) of the reaction,
Cr(hedtra)(H2O)+N3−(Remark: Graphics omitted.)Cr(N3)(hedtra)−+H2O
were determined to be 113±9 M−1 for K, 19.9±1.1 M−1 s−1 for kf and 0.176±0.010 s−1 for kb at an ionic strength of 1.0 (NaClO4) and 25°C. The reaction is considered to proceed through an associative interchange mechanism.
RESONANCE RAMAN SPECTROSCOPIC DETECTION OF ELECTROCHEMICALLY GENERATED DIANION OF NAPHTHACENE
Authors: Ikeshoji Tamio , Mizuno Toshihiko , Sekine Taro 
Published: July 2006

Abstract
Resonance Raman and visible absorption spectra of the naphthacene dianion generated by electrolytic reduction from the naphthacene anion radical were measured in tetrahydrofuran in the absence of any supporting electrolyte. The resonance Raman scattering from the dianion located near a cathode was successfully observed when the intensity of laser light as an exciting source was reduced to prevent the convection of the dianion by thermal effect.
CdS-ELECTROCHEMICAL PHOTOCELL WITH S2− ION-CONTAINING ELECTROLYTE
Authors: Minoura Hideki , Oki Takeo , Tsuiki Masayasu 
Published: July 2006

Abstract
S2− ion in the electrolyte of CdS-electrochemical photocell makes the flatband potential of CdS electrode shift remarkably toward the cathodic direction and also makes this electrode photoelectrochemically stable. The possibility of an efficient electrochemical photocell with CdS electrode has been demonstrated by the polarization characteristics .
HIGH PRESSURE CELLS FOR THE STUDY OF MODERATELY FAST REACTION IN SOLUTION
Authors: Sasaki Muneo , Okamoto Masami , Tsuzuki Hideaki , Osugi Jiro 
Published: July 2006

Abstract
A technique for the study of moderately fast reaction in solution up to 2000 kg/cm2 was developed. Two types of cells were devised and applied to the thermal measurement of the cationic polymerization of tetrahydrofuran and spectrophotometric one on the reaction of tetracyanoethylene with vinyl ethyl ether.
CHEMISTRY OF SUPEROXIDE ION. REACTION OF SUPEROXIDE ION WITH SUBSTRATES HAVING LABILE HYDROGENS
Authors: Moro-Oka Yoshihiko , Chung Pyoung Jin , Arakawa Hironori , Ikawa Tsuneo 
Published: July 2006

Abstract
The reactions between superoxide ion with substrates having labile hydrogens were examined by using KO2-18-crown-6-DMSO system. Superoxide ion abstracts hydrogen from the substrate, only when formed radical can be highly stabilized by conjugating π-electrons
1,2-CARBONYL TRANSPOSITION IN SOME KETONES
Authors: Shono Tatsuya , Nishiguchi Ikuzo , Nitta Masahiro 
Published: July 2006

Abstract
The electrochemical method of the introduction of α-acetoxy or α-methoxy group on a ketone was applied to accomplish the 1,2-carbonyl transposition in ketones. The acid-catalyzed reaction of β-acetoxy or β-methoxy alcohols prepared by the reduction or Grignard reaction of the α-acetoxy or α-methoxy ketones gave the 1,2-carbonyl transposed ketones.
TRICHLORO- AND TRIBROMOTRIS{TRICHLOROSTANNATO(II)}RHODATES(III)
Authors: Kimura Takashi , Miki Eiichi , Mizumachi Kunihiko , Ishimori Tatsujiro 
Published: July 2006

Abstract
Tetramethylammonium salt of trichlorotris{trichlorostannato(II)}rhodate (III), [(CH3)4N]3[RhCl3(SnCl3)3] was prepared by treating rhodium trichloride with tin (II) chloride in hydrochloric acid solution. The complex rapidly changed to [RhBr3(SnCl3)3]3− in the presence of Br− in hydrochloric acid solution. Both these complexes are new six-coordinate rhodium(III) complexes which can be considered to be facial.
RADICAL TRANSFORMATION IN SOME GAMMA-IRRADIATED POLY-α-OLEFINS
Authors: Kusumoto Naoshi 
Published: July 2006

Abstract
Some gamma-irradiated poly-α-olefins showed the change of ESR spectra from a complexed pattern to a simple singlet at room temperature. This was well elucidated by a reaction kinetic study on the assumption that short life radicals were transformed into stable ones.
S,S-DI-2-PYRIDYL DITHIOLOPHOSPHATE AS A KEY INTERMEDIATE IN THE PHOSPHORYLATION BY OXIDATION-REDUCTION CONDENSATION
Authors: Hashimoto Mitsunori , Ueki Masaaki , Mukaiyama Teruaki 
Published: July 2006

Abstract
A key intermediate of phosphorylation by oxidation-reduction condensation which is useful for the preparation of various nucleotides was studied by means of 31P NMR using methanephosphonate as a model compound. The intermediate, S,S-di-2-pyridyl methanedithiolophosphonate, was formed quite rapidly by the reaction of methanephosphonic acid and triphenylphosphine-d15-2,2′-dithiodipyridine (PyS)2 in anhydrous pyridine and could be stored in solution.
SELECTIVE HYDROGENATION OF CONJUGATED DIOLEFINS TO MONOOLEFINS CATALYZED BY A POLYMER-PALLADIUM COMPLEX
Authors: Nakamura Yoshio , Hirai Hidefumi 
Published: July 2006

Abstract
A polymer–palladium complex prepared from palladium(II) chloride and styrene-divinylbenzene copolymer with iminodiacetic acid groups is found to catalyze the selective hydrogenation of conjugated diolefins to monoolefins at 30°C under an atmospheric hydrogen pressure.
A NOVEL ACETYL MIGRATION REACTION FROM OXYGEN TO OXYGEN IN A PYRIDOXINE DERIVATIVE PROMOTED BY METAL IONS
Authors: Iwata Masaaki , Kuzuhara Hiroyoshi , Emoto Sakae 
Published: July 2006

Abstract
2′-Acetoxy-3-acetyl-4′,5′-O-isopropylidenepyridoxine (I) was specifically converted to 2′-acetoxy-4′-acetylpyridoxine (III) in acetone in the presence of metal ions such as zinc, copper(II), iron(III), and aluminium in varying degree. Of these catalysts ferric ion was the most effective to complete the migration reaction. In the other pyridoxine analogues, no migration reaction was induced by these catalysts.
TRANSPOSITION OF LACTONE IN SESQUITERPENE LACTONE: CHEMICAL TRANSFORMATION OF α-SANTONIN INTO SESQUITERPENE α-METHYLENE-γ-LACTONE, YOMOGIN
Authors: Yamakawa Koji , Nishitani Kiyoshi , Yamamoto Akihiro 
Published: July 2006

Abstract
The chemical transformation of of α-santonin (I) into yomogin (II) was investigated. Introduction of an oxygen function at C-8 of trienone (V) was effected by tert-butyl chromate to give dione (VII), Partial reductive lactonization converted VII to XIII-XV. Phenylselenenylation of XIII gave XVI which was then syn-eliminated to give yomogin (II).
DEHYDRATIVE CONDENSATION OF BENZOPHENONE WITH AMMONIA CATALYZED BY ION-EXCHANGE RESINS AND ITS APPLICATION TO AZINE SYNTHESIS
Authors: Hayashi Hiromu , Kawasaki Kengo , Mori Masataka 
Published: July 2006

Abstract
Diphenylmethanimine was selectively formed by passing ammonia through benzophenone at 200°C in the presence of ion-exchange resins. Attempts were made to obtain azine directly from benzophenone, ammonia and oxygen using the resins with CuCl and revealed acidic resins to be active while basic ones less active.
SYNTHESIS OF 16-METHYLENE-PROSTAGLANDINS AND 16,16-ETHANO-PROSTAGLANDINS
Authors: Miyake Hajimu , Iguchi Sadahiko , Kori Seiji , Hayashi Masaki 
Published: July 2006

Abstract
Synthesis of the new prostaglandin (PG) analogs sensitive to acid, 16-methylene-PGF2α methyl ester, 16-methylene-PGE2 methyl ester, 16,16-ethano-PGF2α methyl ester, and 16,16-ethano-PGE2 methyl ester, is reported. These PG analogs have higher biological activities but have fewer side-effects.