bluuebunny/crossref_metadata_2025_split huggingface dataset:
STEREOCHEMISTRY OF THE RING CLOSURE REACTION OF OPTICALLY ACTIVE 1-AMINO-2-PROPANOL
Authors: Yahiro Nobuhide 
Published: July 2006

Abstract
Optically active 2-methylethylenimine has been prepared via ring closure reaction of (R)- or (S)-1-amino-2-propanol. The reaction is explained by an intramolecular SN2 mechanism.
AROMATIC IODINATION WITH ALUMINUM AND COPPER(II) CHLORIDES AND IODINE
Authors: Sugita Toshio , Idei Mitsushige , Ishibashi Yoshiyuki , Takegami Yoshinobu 
Published: July 2006

Abstract
Aryl iodides have been synthesized by a simple reaction of aromatic compounds with iodine and an equimolecular mixture of aluminum and copper(II) chlorides. The reaction is widely capable of application, especially to liquid aromatic substrates, with fair to excellent yields.
A NEW METHOD FOR SYNTHESIS OF α,β-UNSATURATED δ-LACTONES VIA MICHAEL ADDITION USING METHYL (PHENYLSULFINYL)ACETATE
Authors: Yoshida Takashi , Saito Shojiro 
Published: July 2006

Abstract
Variuos α,β-unsaturated δ-lactones were synthesized via Michael addition of methyl (phenylsulfinyl)acetate to alkyl vinyl ketones in the presence of tributylphosphine. For example, racemic massoia lactone was obtained in 49% overall yield.
A NEW METHOD FOR THE SYNTHESIS OF β-HYDROXYESTERS BY USING METALLIC TIN
Authors: Harada Taira , Mukaiyama Teruaki 
Published: July 2006

Abstract
Metallic tin or activated metallic tin, prepared by reduction of stannous chloride with lithium aluminum hydride, smoothly reacts with α-haloesters to yield tin enolates, which in turn react with carbonyl compounds under mild conditions to give, after hydrolysis, β-hydroxyesters in high yields.
SIGMATROPIC REARRANGEMENTS OF 2-(TRIMETHYLSILYL)ALLYL ALCOHOL DERIVATIVES: FACILE AND GENERAL ENTRIES TO FUNCTIONALIZED VINYLSILANES
Authors: Mikami Koichi , Kishi Naoyuki , Nakai Takeshi 
Published: July 2006

Abstract
Facile preparations of a variety of vinylsilanes with different functional groups are described which rely upon the utility of the three sigmatropic processes of 2-(trimethylsilyl)allyl alcohol derivatives, i.e., the Claisen and [2,3]-Wittig rearrangement and the tandem [2,3]-Wittig-oxy-Cope rearrangement.
A NEW PROCEDURE FOR DESULFONYLATION: PREPARATION OF β-SUBSTITUTED α,β-UNSATURATED KETONES AND ALDEHYDES
Authors: Yoshida Takashi , Saito Shojiro 
Published: July 2006

Abstract
The treatment of the tert-alkyl sulfones bearing carbonyl group at the β-position with 5 % hydrochloric acid in THF at 30–65 °C afforded β-substituted α,β-unsaturated ketones and aldehydes in excellent yields.
15N CHEMICAL SHIFTS OF 2,4,6-TRIMETHYLPYRIDINE AND ITS ANIONS1
Authors: Konishi Kazuyori , Yoshino Akihiro , Katoh Morimatsu , Matsumoto Hiroshi , Takahashi Kensuke , Iwamura Hiizu 
Published: July 2006

Abstract
The 15N chemical shifts have been observed for three enriched title compounds in diethyl-d10 ether by means of an INDOR technique. The shifts are discussed in terms of the electron densities on the ring nitrogens.
WEITZ-TYPE ORGANOSULFUR π-DONORS WITH A CUMULENIC BOND. VARIATION OF TERMINAL GROUPS AND CUMULENIC BOND IN BIS(THIOPYRANYLIDENE)ETHENE SYSTEM
Authors: Nakasuji Kazuhiro , Takatoh Kohki , Murata Ichiro 
Published: July 2006

Abstract
Unsymmetrical bis(thiopyranylidene)ethene (BTPE) derivatives (4) and (5) and an extended analogue of BTPE (6) have been prepared and their electrochemical properties are compared with those reported for the related compounds.
SYNTHESIS OF THE SEX-ATTRACTANT OF PINE SAWFLIES (DIPRION SPECIES); (2S,3R,7R)- AND (2S,3R,7S)-3,7-DIMETHYLPENTADECAN-2-OL
Authors: Kikukawa Tadashi , Imaida Motomasa , Tai Akira 
Published: July 2006

Abstract
In order to establish the stereochemistry of the sex attractant of diprion species of pine sawflies, two candidate epimers, (2S,3R,7R)-and (2S,3R,7S)-3,7-dimethylpentadecan-2-ol were synthesized by the coupling reaction of optically active C5 and C12 units. The C12 units, (R)-(−)-and (S)-(+)-1-bromo-2-methyludecane were prepared from (R)-(+)-pulegone. The C5 unit, (2R,3S)-2-methyl-3-tetrahydropyranoxy-1-tosyloxybutane was derived from (2S,3S)-2-methyl-3-hydroxybutyric acid prepared by the reported prodedure.
Cu-FLUOR TETRA SILISIC MICA. A NOVEL EFFECTIVE CATALYST FOR THE DEHYDROGENATION OF METHANOL TO FORM METHYL FORMATE
Authors: Morikawa Yutaka , Takagi Katsuhiko , Moro-Oka Yoshihiko , Ikawa Tsuneo 
Published: July 2006

Abstract
Cu ion exchanged form of fluor tetra silisic mica (Cu-TSM) is remarkably active and selective for the dehydrogenation of methanol to methyl formate. The exclusive activity of Cu-TSM is caused by both no acidity of TSM itself and the high resistivity of exchanged Cu ions against the reduction to Cu metals. Cu-TSM eclipsed the patent catalysts especially by the selective activity.
PALLADIUM ASSISTED N-METHYL ACTIVATION OF p-SUBSTITUTED N,N-DIMETHYLANILINES
Authors: Sakakibara Tsutomu , Hamakawa Tomoko 
Published: July 2006

Abstract
Intermediates in the reaction of N,N-dimethylanilines with palladium (II) acetate were trapped by acetate ion or oxygen to give N-methyloxygenated and demethylated products, while the trapping by other anilines gave homo- and cross-coupling cyclodimers. The reactions proceed via radical cation formation induced by the palladium salt.
INCREASE AND APERIODIC OSCILLATION IN FLUORESCENCE INTENSITY FROM IRRADIATED SOLUTION OF N-METHYLANTHRANILOHYDROXAMIC ACID IN METHANOL
Authors: Lipczynska-Kochany Ewa , Iwamura Hiizu 
Published: July 2006

Abstract
A methanol solution of N-methylanthranilohydroxamic acid showed a reversible increase and an eventual oscillation of fluorescence intensity during continued excitation at 370 nm in a spectrofluorometer.
REDUCTION OF NITRIC OXIDE BY CARBON MONOXIDE AND WATER IN AN AQUEOUS ALKALINE SOLUTIONS OF HEXARHODIUM HEXADECACARBONYL AND TETRARHODIUM DODECACARBONYL COMPLEXES
Authors: Naito Shuichi , Tamaru Kenzi 
Published: July 2006

Abstract
The reduction of nitric oxide to ammonia was examined in an aqueous KOH solution of Rh6(CO)16 or Rh4(CO)12 complex. It is confirmed that the water gas shift reaction is incorporated with this reaction, providing hydrogen for ammonia formation.
SYNTHESES OF TETRA-t-BUTYLHEXAKISDEHYDRO[18]ANNULENO[26]ANNULENEDIONE AND DI-t-BUTYLDIFUROTRISDEHYDRO[18]ANNULENE
Authors: Iyoda Masahiko , Ogura Fumio , Azuma Tatsuo , Akiyama Shuzo , Nakagawa Masazumi 
Published: July 2006

Abstract
Tetra-t-butylhexakisdehydro[18]annuleno[26]annulenedione, a key substance for the synthesis of tetra-t-butyloctakisdehydro[18]annuleno[18]annuleno[18]annulene has been synthesized. Formation of di-t-butyldifurotrisdehydro[18]annulene was observed on heating a solution of diformylmethylene derivative of the tetrakisdehydro[18]annulene.
PICOSECOND PULSE RADIOLYSIS OF LIQUID n-ALKANES
Authors: Sumiyoshi Takashi , Tsugaru Kazunori , Katayama Meiseki 
Published: July 2006

Abstract
Transient cationic species produced in irradiated liquid n-alkanes (heptane-decane) were observed by the stroboscopic picosecond pulse radiolysis technique at room temperature. The half life, buildup spectra and G ε were obtained and discussed.
THE YIELD OF HYDRATED ELECTRONS AT 30 PICOSECONDS
Authors: Sumiyoshi Takashi , Katayama Meiseki 
Published: July 2006

Abstract
Direct measurements of the yield of hydrated electrons in aqueous solutions were carried out using a stroboscopic picosecond pulse radiolysis system. The yield 30 ps after irradiation, G(eaq−)30ps, was determined to be 4.8±0.3 products per 100 eV as compared to the G(eaq−)100ns of 2.7.
SYNTHESIS OF OLIGORIBONUCLEOTIDES USING 4-METHOXYBENZYL GROUP AS A NEW PROTECTING GROUP OF THE 2′-HYDROXYL GROUP OF ADENOSINE
Authors: Takaku Hiroshi , Kamaike Kazuo 
Published: July 2006

Abstract
4-Methoxybenzyl group was introduced directly to the 2′-hydroxyl group from the reaction of adenosine with 4-methoxybenzyl bromide in the presence of sodium hydride. The 2′-O-(4-methoxybenzyl)adenosine can be successfully used in the synthesis of oligoribonucleotides via phosphotriester approach. The 4-methoxybenzyl group was removed rapidly from the oligoribonucleotides by triphenylmethyl fluoroborate and the completely deblocked oligoribonucleotides were characterized by emzymatic hydrolysis.
A NEW AND FACILE STEREOSELECTIVE SYNTHESIS OF CIS-4a-ARYL-1,2,3,4,4a,5,6,8a-OCTAHYDROISOQUINOLINE DERIVATIVES
Authors: Kano Shinzo , Yokomatsu Tsutomu , Yuasa Yoko , Shibuya Shiroshi 
Published: July 2006

Abstract
Cis-1,2,3,4,4a,5,6,8a-octahydro-2-methyl-4a-phenylisoquinolin-3-one was obtained by cyclization of the acyliminium ion intermediate, derived from the corresponding amide. Reduction of this cyclization product with LiAlH4 in THF afforded cis-1,2,3,4,4a,5,6,8a-octahydro-2-methyl-4a-phenylisoquinoline. In a similar way, the octahydro-4a-(2-methoxyphenyl) isoquinolin-3-one was also prepared from the corresponding amide.
ION-PAIR CHROMATOGRAPHIC DETERMINATION OF ORGANIC BASES USING COLOR REACTION OF TETRABROMOPHENOLPHTHALEIN ETHYL ESTER
Authors: Yoshitoku Youko , Moriyasu Masataka , Hashimoto Yohei 
Published: July 2006

Abstract
By using TBPE as ion-pairing counter-ion whose absorption spectrum differs markedly from that of the resulting ion-pairs, ion pair high pressure liquid chromatographic determination of many organic bases was carried out sensitively without the absorptive background of TBPE added in the mobile phase.
TRICYCLO[3.3.0.02,8]OCTANONES AS BUILDING BLOCKS IN NATURAL PRODUCTS SYNTHESIS. –SYNTHESIS OF (±)-FORSYTHIDE AGLYCON DIMETHYL ESTER–
Authors: Takemoto Tadahiro , Isoe Sachihiko 
Published: July 2006

Abstract
The stereocontrolled synthesis of (±)-forsythide aglycon dimethyl ester from 4-methoxycarbonyl-tricyclo[3.3.0.02,8]octan-3-one (6) is described.
TWO-DIMENSIONAL BAND STRUCTURE OF AN ORGANIC METAL, PERCHLORATE SALT OF BIS(ETHYLENEDITHIOLO)-TETRATHIAFULVALENE (BEDT-TTF)2ClO4(C2H3Cl3)0.5
Authors: Mori Takehiko , Kobayashi Akiko , Sasaki Yukiyoshi , Kobayashi Hayao , Saito Gunzi , Inokuchi Hiroo 
Published: July 2006

Abstract
The intermolecular overlap integrals and the band structure of the perchlorate salt of bis(ethylenedithiolo)-tetrathiafulvalene (BEDT-TTF)2ClO4(C2H3Cl3)0.5 were calculated using semiempirical molecular orbital calculation. The ratio of the transverse and the longitudinal overlap integrals is 3–10 and the complex is regarded as a new-type two-dimensional organic semimetal.
PHOTOCHEMICAL REACTIONS OF CHLOROANTHRAQUINONES
Authors: Hamanoue Kumao , Yokoyama Kazuo , Miyake Takao , Kasuya Toshihiro , Nakayama Toshihiro , Teranishi Hiroshi 
Published: July 2006

Abstract
Irradiation of 1,5-dichloroanthraquinone (1,5-DCAQ) with 366-nm light in ethanol gives anthrahydroquinone (AQH2) as a final product. This is interpreted in terms of the following consecutive reactions; 1,5-DCAQ\xrightarrowhν1,5-dichloroanthrahydroquinone\xrightarrowhν1–chloroanthraquinone\xrightarrowhν1-chloroanthrahydroquinone\xrightarrowhνanthraquinone\xrightarrowhνAQH2. Similar reactions were also observed for other α-chloroanthraquinones.
ADDITION OF AMINES TO CONJUGATED DIENES CATALYZED BY SOLID BASE CATALYSTS
Authors: Kakuno Yumiko , Hattori Hideshi , Tanabe Kozo 
Published: July 2006

Abstract
Addition of dimethylamine, ethylamine, and piperidine to 1,3-butadiene or 2-methyl-1,3-butadiene effectively occurred over solid base catalysts such as MgO, CaO, SrO, La2O3, and ThO2. Among these catalysts, CaO exhibited the highest activity.
THE EFFECT OF OXYGEN SORPTION ON THE CRYSTAL STRUCTURE OF La1−xSrxCoO3−δ
Authors: Yamazoe Noboru , Furukawa Shoichi , Teraoka Yasutake , Seiyama Tetsuro 
Published: July 2006

Abstract
High temperature X-ray diffractometry was applied to investigate the effects of oxygen sorption on the structure of La1−xSrxCoO3−δ. The lattice parameters of SrCoO2.5+δ (x =1), which was found to have a tetragonal unit cell in this study, were markedly affected by oxygen sorption, while no such effects were observed for the samples x=0, 0.2, and 0.4 with perovskite structure. It is suggested that the structural effects of oxygen sorption arise from the reordering of oxygen vacancies.
THREE NEW ANTI-TUMOR DITERPENOIDS, TRICHORABDALS A, C, AND D
Authors: Node Manabu , Sai Midori , Fuji Kaoru , Fujita Eiichi , Shingu Tetsuro , Watson William H , Grossie David 
Published: July 2006

Abstract
Structures of trichorabdals A, C, and D, isolated from Rabdosia trichocarpa have been determined by means of chemical, spectroscopic, and X-ray crystallographic methods. The compounds possess potent anti-tumor activity.
THE ab initio OPTIMIZED GEOMETRY OF THE 6-SILYLCYCLOHEXADIENYL RADICAL
Authors: Kira Mitsuo , Sakurai Hideki 
Published: July 2006

Abstract
The optimized geometry of the 6-silylcyclohexadienyl radical calculated by the energy gradient method with the STO-3G basis set shows that the radical has a distorted ring structure with the energy minimum at 4.3° of out-of-plane angle.
HIGHLY REGIOSELECTIVE SYNTHESIS OF (1-METHYL-2-PROPENYL)TRIMETHYLSILANE USING THE “CROTYL” GRIGNARD REAGENT AND TRIMETHYLCHLOROSILANE
Authors: Hosomi Akira , Iguchi Hirokazu , Sakurai Hideki 
Published: July 2006

Abstract
Factors influencing the regioselectivity of the reaction of the “crotyl” Grignard reagent (1) with trimethylchlorosilane are investigated. The regioselectivity of the reaction is strikingly controlled by changing solvent and reaction temperature and by the addition of cuprous iodide. (1-Methyl-2-propenyl)trimethylsilane is obtained selectively in THF at low temperature in the presence of cuprous iodide.
INTRODUCTION OF CARBON UNIT AT THE α-POSITION OF ALICYCLIC AMINES UTILIZING A DECARBOXYLATION REACTION WITH MALONIC ACID DERIVATIVES
Authors: Fukawa Hidemichi , Terao Yoshiyasu , Achiwa Kazuo , Sekiya Minoru 
Published: July 2006

Abstract
A new method for introducing carbon unit at the α-position of alicyclic amines has been exploited. The method involves a reaction of trimers of alicyclic imines with malonic acid derivatives, of which decarboxylation leads to a formation of carbon-carbon bond at the α-position of alicyclic amines.
ENANTIOFACE-DIFFERENTIATING HYDROGENATION OF 2-OCTANONE OVER MODIFIED RANEY NICKEL IN THE REACTION MEDIA CONTAINING ORGANIC ACID
Authors: Osawa Tsutomu , Harada Tadao 
Published: July 2006

Abstract
The use of a mixture of THF and carboxylic acid as the reaction medium resulted in drastic increase in the optical yield of the hydrogenation of 2-octanone to optically active 2-octanol over tartaric acid-NaBr-modified Raney nickel (TA-NaBr-MRNi). Among the carboxylic acids examined, pivalic acid gave the highest optical yield (65.6%).
PENTACARBONYLIRON INDUCED REARRANGEMENT OF PHENYL-SUBSTITUTED EPOXIDE UNDER ULTRAVIOLET IRRADIATION
Authors: Kobayashi Tomoshige , Nitta Makoto 
Published: July 2006

Abstract
Phenyl-substituted epoxides rearrange to aldehydes or ketones in the presence of pentacarbonyliron under ultraviolet irradiation. Epoxides which have a phenyl group and an electron-withdrawing substituent at the vicinal positions undergo deoxygenation affording olefins.
SELECTIVE CLEAVAGE OF ESTER AND ETHER FUNCTIONS WITH BBr3 OR Me3SiX IN SUBSTITUTED N-ARYLAZETIDINONES
Authors: Wakselman Michel , Zrihen Maryse 
Published: July 2006

Abstract
At −30°C BBr3 is a milder reagent than Me3SiI and Me3SiCl + NaI for the cleavage of methyl or tert-butyl esters and benzyl ether group of the title β-lactams without destroying the azetidinone ring.
A NEW METHOD FOR THE DIRECT INTRODUCTION OF ALKOXYL GROUP TO SILYL ENOL ETHER WITH ALKYL HYPOCHLORITE CATALYZED BY PALLADIUM(O)
Authors: Nakatsuka Takashi , Mukaiyama Teruaki 
Published: July 2006

Abstract
α-Alkoxyketones and α-ketoacetals are prepared in good yields from silyl enol ethers and alkyl hypochlorites catalyzed by tetrakis (triphenylphosphine)palladium(O).
THE FORMATION OF 2-ACYLAMINO-4-t-BUTYL-6-NITROPHENOLS BY THE PHOTO-IRRADIATION OF 1-ALKOXY-4-t-BUTYL-2,6-DINITROBENZENES
Authors: Obara Heitaro , Onodera Jun-ichi , Hattori Masahiko 
Published: July 2006

Abstract
The photo-irradiation of 1-methoxy-, 1-ethoxy-, and 1-n-propoxy-4-t-butyl-2,6-dinitrobenzenes gave 2-formylamino-, 2-acetylamino-, and 2-propanoylamino-4-t-butyl-6-nitrophenols, respectively. The structures of these photo-irradiation products were confirmed by the comparison with the synthetic samples.
TOTAL SYNTHESIS OF (±)-ISOALANTOLACTONE AND (±)-DIHYDROCALLITRISIN
Authors: Tada Masahiro 
Published: July 2006

Abstract
Two eudesmanolides having opposite stereochemistry of lactone ring each other, (±)-isoalantolactone and (±)-dihydrocallitrisin were synthesized stereoselectively by a route involving alkylation of 2-methyl-3-furoic acid and oxidation of furan ring.
SYNTHESIS OF OPTICALLY PURE ENKEPHALIN ANALOG, [D-Ala2, Leu5-ol]ENKEPHALIN, USING CHIRAL β-LACTAMS AS SYNTHETIC INTERMEDIATES
Authors: Hatanaka Naoto , Abe Rumiko , Ojima Iwao 
Published: July 2006

Abstract
Optically pure pentapeptide, l-Tyr-d-Ala-Gly-l-Phe-l-Leu-ol (1) which is an analog of opioid hormone, enkephalin, was successfully synthesized by using β-lactam building blocks as chiral synthons of peptide units.
SYNTHESIS OF PEPTIDES CONTAINING HYDROXYAMINO ACIDS BY THE MIXED ANHYDRIDE METHOD WITHOUT PROTECTING THE HYDROXYL FUNCTIONS
Authors: Ueki Masaaki , Inazu Toshiyuki 
Published: July 2006

Abstract
Dimethylphosphinothioyl(Mpt) mixed anhydrides of N-protected amino acids were found to be isolatably stable and useful for the synthesis of hydroxyamino acid containing peptides without protecting the side-chain hydroxyl functions. They were applied for the solid phase synthesis of an enkephalin analog extended at C-terminal.
THREE NEW SESQUITERPENE PHENOLS OF THE ENT-HERBERTANE CLASS FROM THE LIVERWORT HERBERTA ADUNCA
Authors: Matsuo Akihiko , Yuki Shunji , Nakayama Mitsuru , Hayashi Shûichi 
Published: July 2006

Abstract
Three sesquiterpene phenols with an ent-herbertane skeleton have been isolated from the liverwort Herberta adunca, and the elucidation of their structures and absolute configurations has been achieved on the basis of the chemical and spectral evidence.
TOTAL SYNTHESES OF ZALUZANIN C, ZALUZANIN D, AND 3-EPIZALUZANIN C
Authors: Ando Masayoshi , Yamaoka Hiroaki , Takase Kahei 
Published: July 2006

Abstract
The biologically active guaianolides, zaluzanin C and zaluzanin D, and the stereoisomeric guaianolide, 3-epizaluzanin C, have been synthesized by two different procedures. The stereochemistry at C3 of zaluzanin C has been established to be S configuration by this synthesis.
A NEW LIBRARY SEARCH SYSTEM FOR THE IDENTIFICATION OF MASS SPECTRA
Authors: Shindo Junko , Yasuhara Akio , Ito Hiroyasu , Mizoguchi Tsuguo 
Published: July 2006

Abstract
A new library search system for mass spectra consisting of the pre-search involving seven step filters and the main search modified on the basis of the Probability Based Matching method has been developed.
REACTION OF ETHYL 2-AZIDOPROPENOATE WITH NUCLEOPHILES
Authors: Kakimoto Masa-aki , Kai Mariko , Kondo Kiyosi , Hiyama Tamejiro 
Published: July 2006

Abstract
The title compound is transformed into ethyl 2-aminopropenoate having 3-phenylthio or 3-ethoxy substituent upon treatment with thiophenol or sodium (or lithium) ethoxide in ethanol, respectively. The reaction with ethyl mercaptoacetate is also discussed.
A NEW REDUCTIVE SILYLATION OF p-QUINONES WITH HEXAMETHYLDISILANE CATALYZED BY IODINE
Authors: Matsumoto Hideyuki , Koike Shunji , Matsubara Ikuya , Nakano Taichi , Nagai Yoichiro 
Published: July 2006

Abstract
In the presence of a catalytic amount of iodine, hexamethyldisilane can reductively silylate p-quinones under mild conditions to afford 1,4-bis(trimethylsiloxy)arenes in high yields.
SYNTHETIC STUDIES ON TROPONIN I ACTIVE SITE. PREPARATION OF A HEXADECAPEPTIDE WITH BINDING ACTIVITY TOWARD TROPONIN C
Authors: Nozaki Sukekatsu , Katayama Eisaku , Muramatsu Ichiro 
Published: July 2006

Abstract
A hexadecapeptide corresponding to a partial sequence (positions 10–25) of troponin I from rabbit fast skeletal muscle was synthesized in a combination of the ‘hold-in-solution’ method and the usual liquid phase method. The synthesized peptide (1) formed a Ca2+-dependent complex with rabbit skeletal troponin C. The CD spectra of 1 showed that 1 in hydrophobic media contained α-helical peptide bonds.
PREPARATION OF TRIFLUOROACETONITRILE PHENYLIMINE AND ITS REACTIONS WITH SOME DIPOLAROPHILES
Authors: Tanaka Kiyoshi , Maeno Seiji , Mitsuhashi Keiryo 
Published: July 2006

Abstract
Trifluoroaceto-N-phenylhydrazonoyl halides, the precursors of trifluoroacetonitrile phenylimine, prepared by halogenation of trifluoroacetaldehyde phenylhydrazone, react with various olefins and acetylenes in the presence of triethylamine to give 3-trifluoromethylpyrazolines and pyrazoles, respectively. The regioselective results are discussed in terms of HOMO-LUMO interaction of trifluoroacetonitrile phenylimine and dipolarophiles.
PHOTOCATALYTIC HYDROGEN PRODUCTION FROM A MIXTURE OF WATER AND 2-PROPANOL ON SOME SEMICONDUCTORS
Authors: Domen Kazunari , Naito Shuichi , Onishi Takaharu , Tamaru Kenzi 
Published: July 2006

Abstract
The photocatalytic production of H2 and acetone from a mixture of water and 2-propanol in gas and liquid phases was studied on some semiconductor powders such as NiO supported SrTiO3, CdS and TiO2 etc. This reaction did not proceed without H2O, indicating the coupling of the photodecomposition of H2O and the photo-oxidation of 2-propanol.
THE J BAND OF THE MALACHITE GREEN-POLY(α-l-GLUTAMIC ACID) COMPLEX: THE CONDITIONS FOR ITS APPEARANCE IN AQUEOUS SOLUTIONS
Authors: Yamaoka Kiwamu , Shimadzu Mitsuaki 
Published: July 2006

Abstract
The optimum conditions for the appearance of the J band of Malachite Green bound to poly(α-l-glutamic acid) are established by the method of absorption spectroscopy. The J band in the visible spectra depends very critically on such factors as pH, aging, mixing ratio, salt concentration, and, above all, the polymer conformation.
A CONVENIENT METHOD FOR THE PREPARATION OF 1-(METHYLTHIO) AND 1-(PHENYLTHIO)VINYLLITHIUM REAGENTS
Authors: Takeda Takeshi , Furukawa Hiroyuki , Fujiwara Tooru 
Published: July 2006

Abstract
1-(Methylthio) and 1-(phenylthio)vinyllithiums were prepared by the treatment of the corresponding 2-methoxyethyl sulfides with twice molar amounts of butyllithium in the presence of N,N,N′,N′-tetramethylethylenediamine (TMEDA). β-Alkylthio-β,γ-unsaturated alcohols were obtained in good yields by the reaction of the lithium salts with aldehydes.
A VERSATILE SYNTHESIS OF ARYLACETONES FROM ARYL HALIDES AND ACETYLACETONATE
Authors: Sugai Saburo , Ikawa Hiroshi , Okazaki Tokuji , Akaboshi Sanya , Ikegami Shiro 
Published: July 2006

Abstract
Reaction of aryl halides with sodium or potassium acetylacetonate in the presence of a copper catalyst affords directly arylacetones resulted from deacetylation of initially formed 3-arylacetylacetones in good yields.
A NOVEL REACTION OF 8,16-BIS(BROMOMETHYL) [2.2]METACYCLOPHANES WITH PHENYL LITHIUM AND PREPARATION OF 8,16-UNSYMMETRICALLY DISUBSTITUTED [2.2]METACYCLOPHANES
Authors: Tashiro Masashi , Yamato Takehiko 
Published: July 2006

Abstract
The reaction of 8,16-bis(bromomethyl) [2.2]metacyclophanes (2) with phenyl lithium in ethyl ether afforded the unexpected spiro compounds 3. It was also found that 8,16-unsymmetrically disubstituted [2.2]metacyclophanes 9 such as 8-methyl-16-halomethyl- and 8-methyl-16-methoxy derivatives were easily prepared from 3.
A FACILE PREPARATION OF RIFAMYCIN DERIVATIVES BY USE OF MANGANESE DIOXIDE
Authors: Seong Baik Lin , Han Moon Hi 
Published: July 2006

Abstract
Rifamycin O, rifamycin S and rifamycin SV were prepared in good yields (88–94%) by the oxidation and hydrolytic cleavage of rifamycin B in the presence of manganese dioxide.
HYDROGEN TRANSFER OF 2,5-DIHYDROANISOLE TO HYDROGEN ACCEPTORS PROMOTED BY BUTYLLITHIUM
Authors: Hiramatsu Mitsuo , Fujinami Tatsuo , Sakai Shizuyoshi 
Published: July 2006

Abstract
2,5-Dihydroanisole treated with butyllithium reacts with hydrogen acceptors as hydrogen donor more predominantly than carbanion to give the corresponding hydrogenated products in good yields.