bluuebunny/crossref_metadata_2025_split huggingface dataset:
THE AZULENE RADICAL ANION PRODUCED BY ONE-ELECTRON TRANSFER FROM TRIMETHYLSILYLSODIUM
Authors: Sakurai Hideki , Umino Hiroshi , Okada Akane 
Published: July 2006

Abstract
The esr spectrum of the radical anion of azulene prepared by the reaction with trimethylsilylsodium in hexamethylphosphoramide with all of the expected 108 lines is reported. The minimum interaction between the azulene radical anion and countercation as compared with any previous results was observed.
CIRCULAR DICHROISM SPECTRA OF COBALT(III) COMPLEXES CONTAINING AMINO ALCOHOL
Authors: Ogino Kazuko , Uchida Takateru , Nishide Toshikazu , Fujita Junnosuke , Saito Kazuo 
Published: July 2006

Abstract
The complex [Co(en)2(l-praH)]Br3, where praH denotes 2-amino-1-propanol, was prepared and separated into two diastereoisomers, ΔL and ΔL. Their circular dichroism(CD) spectra changed remarkably by the change of pH of the solution. These changes were attributed to the dissociation of the alcoholic proton: [Co(en)2(l-praH)]3+\ightleftharpoons [Co(en)2(l-pra)]2+ + H+. The deprotonated l-pra− chelate gave an exceptionally large vicinal contribution to the optical activity. The CD spectra of optically active [Co(en)2(etaH)]Br3(etaH = aminoethanol) and [Co(NH3)4(l-praH)]Br3 are also given.
ANODIC OXIDATION OF TRIALKYLBORANES. A NEW PROCEDURE OF ALKYL COUPLING REACTION OF ORGANOBORANES
Authors: Taguchi Toru , Itoh Mitsuomi , Suzuki Akira 
Published: July 2006

Abstract
Trialkylboranes are readily electrolyzed by using two platinum plates as electrodes in methanol containing potassium hydroxide to give alkyl group coupling products.
A NEW TYPE OF URUSHIBARA NICKEL CATALYST (U–Ni–N). ACTIVATION OF THE PRECIPITATED NICKEL (PRECURSOR OF URUSHIBARA NICKEL CATALYSTS) BY REFLUXING WITH ALCOHOLS
Authors: Kajitani Masatsugu , Okada Junko , Ueda Tetsuya , Sugimori Akira , Urushibara Yoshiyuki 
Published: July 2006

Abstract
A new method of activation of ppt-Ni by refluxing with alcohols is described. The ppt-Ni activated in this way (U–Ni–N) exhibits high catalytic activity corresponding to U–Ni–A. The catalyst performs selective reactions in the hycrogenation of 1-octene (low isomerization) and of cyclcolefins.
A NEW DERIVATIVE OF ANTIBIOTIC B-58941
Authors: Suzuki Takashi 
Published: July 2006

Abstract
Structure of new compound derived by reaction of diacetate of antibiotic B-58941 with sodium methoxide in methanol is assumed as 2′-O-acetyl-2,3-anhydro-13-hydroxy-12-methoxy-depoxy B-58941. It is also assumed that in antibiotic B-58941, d-mycaminose and 4-ulose sugar are bound to C-5-O of the aglycone (by β-linkage) and to C-4′-O of d-mycaminose (by α-linkage), respectively.
THE NICKEL-CATALYZED ISOMERIZATION OF METHYLENECYCLOPROPANE TO BUTADIENE
Authors: Takaya Hidemasa , Hayashi Nobuaki , Ishigami Tatsuzo , Noyori Ryoji 
Published: July 2006

Abstract
Methylenecyclopropane under the influence of nickel catalysts dimerizes to give 2-vinylmethylenecyclopentane. The intervention of butadiene intermediate has been determined on the basis of the isotope incorporation into the product and the asymmetric transformation.
THERMAL POLYMERIZATIONS OF METAL MALEATES IN SOLID STATE
Authors: Konishi Yoshiaki , Saijo Hiroshi 
Published: July 2006

Abstract
When the thermal stabilities of a number of metal maleates in solid state were studied by means of TGA and DTA, they exhibited a remarkable exothermic process at a temperature characteristic of each metal salt. It was found that this process corresponds to the polymerization reaction of the metal maleate. In the cases of Na and Pb(II) salts, the polymer in the form of methyl esters was a brown amorphous solid ( DP \doteqdot 3 ).
CONDUCTIVITY EFFECTS ON CUT-OFF FREQUENCY OF ELECTROHYDRODYNAMIC INSTABILITY IN NEMATIC LIQUIDS
Authors: Matsumoto Shoichi , Kawamoto Masahiro , Tsukada Tomomichi 
Published: July 2006

Abstract
Conductivity effects on the cut-off frequency fc of the electrohydrodynamic instability were studied, using nematic liquids doped with an organic electrolyte in different concentrations. The values of fc were obtained from the optical observation. It was found that fc is proportional to the conductivity (ρ−1) of the nematic liquids, just as fc = Kρ−1; K = 1.25×1012Ωcm/sec. This relation supports that the space charge is responsible for the electrohydrodynamic instability.
STEREOSELECTIVITY PATTERNS OF THE PLATINUM METALS IN THE CATALYTIC HYDROGENATION OF SOME CYCLOOLEFINIC COMPOUNDS
Authors: Nishimura Shigeo , Sakamoto Hiroshi , Ozawa Tsuyoshi 
Published: July 2006

Abstract
The stereoselectivity of the platinum metals in the catalytic hydrogenation of 1,2- and 1,6-dimethylcyclohexene, 1-methyl-2-methylenecyclohexane and 6-ethoxy-1-methylcyclohexene has been studied. The formation of trans isomer increased in the order Ir &lt; Os &lt; Pt,Ru,Rh &lt;&lt; Pd. This order in stereoselectivity has been related to the olefin isomerization activities of the metals.
THE N4-BENZOYLATION OF DEOXYCYTIDYLIC AND CYTIDYLIC ACIDS BY MEANS OF 2-CHLOROMETHYL-4-NITROPHENYL BENZOATE
Authors: Hata Tsujiaki , Kurihara Takashi 
Published: July 2006

Abstract
Useful intermediates in the syntheses of polynucleotides, such as 3′-O-acetyl N4 -benzoyldeoxycytidine 5′-phosphate, 2′,3′-O-diacetyl N4-benzoylcytidine 5′-phosphate, N4-benzoyldeoxycytidine and N4-benzoylcytidine, were prepared conveniently in high yields by the use of a new mild benzoylating reagent, 2-chloromethyl-4-nitrophenyl benzoate.
SYNTHESIS OF 2-DIALKYLAMINO-1,3-DITHIETAN-2-YLIUM SALT. ACTION OF STRONG ACIDS ON BENZYLIDENEBIS(N,N-DIALKYLDITHIOCARBAMATES)
Authors: Ueno Yoshio , Okawara Makoto 
Published: July 2006

Abstract
The protonation of benzylidenebis(N,N-dialkyldithiocarbamates) with 70% perchloric acid or conc. sulfuric acid produced new four-membered heteronium salts; 2-dialkylamino-4-aryl-1,3-dithietan-2-ylium salts in high yields. A possible mechanism for the formation and the structural elucidation of 1,3-dithietan-2-ylium salts were described.
CO-PYROLYSIS OF 1,1,2-TRICHLOROETHANE AND METHANOL ON ACTIVATED ALUMINA
Authors: Shinoda Kiyonori 
Published: July 2006

Abstract
The copyrolysis of 1,1,2-trichloroethane (TCE) and methanol on activated alumina was carried out at 250∼400°C. 1,1-dichloroethylene (VDC) to 1,2-dichloroethylene (DE) ratio amounted to several times of the ordinary pyrolysis. This reaction proceeded as follows.
CH2ClCHCl2 + CH3OH → CH2:CCl2 + CH3Cl + H2O
PHOTOINDUCED REACTIONS. LXXII. REACTIVITY OF SINGLET OXYGEN TOWARD CYCLIC OLEFINS
Authors: Matsuura Teruo , Horinaka Akio , Nakashima Ruka 
Published: July 2006

Abstract
The relative reactivities of various cyclic olefins toward singlet oxygen generated by photosensitized oxygenation were determined. The differences in reactivity are mainly rationalized in term of the conformational requirements of olefins for the concerted “ene” mechanism.
CHLORINATION OF TRANS-1,4-DICHLORO-2-BUTENE
Authors: Shinoda Kiyonori 
Published: July 2006

Abstract
The chlorination of trans-1,4-dichloro-2-butene (tr-DCB-2) in chlorinated hydrocarbon solvents yielded solid and liquid isomers. When methylene chloride (I) was used as a solvent, the solid isomer was obtained in high yield. The ionic pathway dominated in I and was an exclusive trans-addition process.
MAGNETIC PROPERTIES OF MOLTEN CHLORIDE SYSTEMS MnCl2–KCl, CoCl2–KCl AND NiCl2–KCl
Authors: Tanemoto Kei , Nakamura Tetsuro , Sata Toshiyuki 
Published: July 2006

Abstract
Magnetic susceptibilities of chloride systems containing paramagnetic ions Mn2+(3d5), Co2+(3d7) and Ni2+(3d8) were measured with increasing temperatures from their solid states to molten states. The susceptibility of each system obeyed the Curie–Weiss law in the both states and jumped at the melting temperature. The magnetic moments increased on melting in the systems of Co2+ and Ni2+ (L≠0).
ELECTRON TRANSFER FROM AMINES TO LIQUID SULFUR DIOXIDE
Authors: Nagai Toshikazu , Katayama Kaoru , Tokura Niichiro 
Published: July 2006

Abstract
Epr spectra were obtained from solutions of amines in liq·SO2 due to the radical cations of the amines which might be the first observation of the electron transfer from organic molecules to liq·SO2.
CHEMICAL CLEAVAGE OF PEPTIDE BOND AT TRYPTOPHAN RESIDUE : AN IMPROVED METHOD
Authors: Sakiyama Fumio , Masuda Nobuhito 
Published: July 2006

Abstract
An improved method for selective chemical cleavage of the tryptophyl bond according to a principle proposed previously is described. By the present method, tryptophyl bonds in several synthetic oligopeptides were cleaved nearly quantitatively.
EFFECT OF SALT ON THE CONFORMATION OF GEL-FORMING β-1,3-d-GLUCAN IN ALKALINE SOLUTION
Authors: Ogawa Kozo , Tsurugi Jitsuo , Watanabe Takehiko 
Published: July 2006

Abstract
Effect of sodium chloride on the conformation of a gel-forming β-1,3-d-glucan in sodium hydroxide solution was studied. The increase of the salt concentration causes the conformational transition of the glucan from a random coil to an ordered structure when the alkaline concentration is below 0.3 N.
THE REACTION OF TRIALKYLBORANES WITH THE (α-LITHIO DERIVATIVES OF BIS(PHENYLTHIO)METHANE AND OF 1,1-BIS(PHENYLTHIO)PENTANE. A CONVENIENT METHOD FOR THE PREPARATION OF ALDEHYDES AND KETONES
Authors: Yamamoto Shoji , Shiono Manzo , Mukaiyama Teruaki 
Published: July 2006

Abstract
It was found that various aldehydes and ketones were readily prepared in good yields by the reactions of α-lithio derivatives of thioacetals with trialkylboranes.
PYRROLIZIDINE ALKALOIDS. THE TOTAL SYNTHESIS OF RETUSAMINIC ACID
Authors: Kiyooka Syun’ichi , Hase Tsunao , Edwards J D 
Published: July 2006

Abstract
(±)-Retusaminic acid has been synthesized from diethyl 1-methylacetonylmalonate and resolved by means of cinchonidine. The synthesized enantiomer was shown to be identical with natural retusaminic acid.
TIME-RESOLVED PHOSPHORESCENCE SPECTRA OF EDA COMPLEXES OF AROMATIC CARBONYLS WITH ANILINES
Authors: Hayashi Hisaharu , Hirota Noboru , Nagakura Saburo 
Published: July 2006

Abstract
Time-resolved phosphorescence spectra were measured at 77 K for several systems containing benzophenone or p-chlorobenzaldehyde as an electron acceptor and aniline, N-methylaniline, or N,N-dimethylaniline as an electron donor in 2-methyltetrahydrofuran. The phosphorescences of the electron donor–acceptor complexes under consideration showed a strong tendency for bimolecular quenching.
BASE-CATALYZED AUTOXIDATION OF 9,10-DIHYDROANTHRACENE WITH ELECTRO-GENERATED SUPEROXIDE ION
Authors: Osa Tetsuo , Ohkatsu Yasukazu , Tezuka Meguru 
Published: July 2006

Abstract
The superoxide ion formed by the electrolysis of oxygen molecule dissolved in pyridine was shown to act as a base-catalyst in autoxidation of 9,10-dihydroanthracene. Iron and cobalt phthalocyanine accelerated the reaction. The rate equation of oxygen consumption was given. The effect of metal phthalocyanine was discussed by cyclic voltammetry.
FLASH PHOTOLYSIS OF A GOLD(III) COMPLEX
Authors: Asai Michihiko , Tazuke Shigeo , Okamura Seizo , Ohno Takeshi , Kato Shunji 
Published: July 2006

Abstract
Flash photolysis of tetra-n-butylammonium tetrabromoaurate (III) was investigated in tetrahydrofuran. Two sorts of transient spectra appeared at 365 nm and 475 nm were analyzed kinetically, the former being assigned to Br2− radical-anion. Additive effect of N-vinylcarbazole was examined.
THE SYNTHESIS OF DIPEPTIDES WHICH CONTAIN α-AMINONITRILES AS THEIR C-TERMINAL RESIDUES
Authors: Kawashiro Katsuhiro , Yoshida Hideyuki , Morimoto Shiro 
Published: July 2006

Abstract
The synthesis of some dipeptides which contain α-aminonitriles as their C-terminal residues is described. The coupling reactions of active esters of N-tritylamino acids, p-nitrophenyl esters or cyanomethyl esters, with α-aminonitriles were carried out in N,N-dimethylformamide. The N-trityl protecting groups of the reaction products were removed by acid hydrolysis without affecting their nitrile groups. In this way, glycylaminoacetonitrile acetate(8), glycyl-Dl-α-aminopropionitrile acetate(10) and Dl-alanylaminoacetonitrile acetate(11) were synthesized.
PHOTOLYTIC AND THERMAL DECOMPOSITIONS OF 2-DIAZOPHENOL. FORMATION OF FULVENE DERIVATIVES
Authors: Yagihara Morio , Kitahara Yoshio , Asao Toyonobu 
Published: July 2006

Abstract
Photolytic decomposition of 2-diazophenol in methanol afforded 6-hydroxy-6-methoxy-2-(2-hydroxyphenylazo)fulvene, guaiol, phenol, and dimer of methyl cyclopentadienecarboxylate. The decomposition in water gave 6,6-dihydroxyfulvene derivative. Thermal decomposition of 2-diazophenol gave fulvenylidenebenzo-1,3-dioxole. Structure and mechanism of the formation of these products are discussed.
CARBOXYLATION OF ACTIVE METHYLENE COMPOUNDS WITH CARBON DIOXIDE IN THE PRESENCE OF FERRIC ALKOXIDE
Authors: Ito Takehiko , Takami Yasuo 
Published: July 2006

Abstract
Active methylene compounds such as cyclohexanone and acetophenone are carboxylated by the reaction with carbon dioxide in the presence of ferric ethoxide under mild conditions to give β-ketoacids.
A STABILITY-SELECTIVITY RELATIONSHIP FOR PHENOLYSES OF ALKYL CHLORIDES AND p-NITROBENZOATES
Authors: Okamoto Kunio , Kinoshita Tomomi 
Published: July 2006

Abstract
The existence of a linear free-energy relationship between the phenolic reactivity and the selectivity for attack of the phenol molecule on carbonium ion intermediates has been established for the titled substrates. The examples are the first ones for the reaction between the carbonium ions and an ambident molecule.
REGIOSPECIFIC NEIGHBORING-GROUP PARTICIPATION BY DITHIOCARBAMATE FUNCTION DURING BROMINATION OF γ-SUBSTITUTED S-ALLYL N,N-DIMETHYLDITHIOCARBAMATES
Authors: Hiratani Kazuhisa , Nakai Takeshi , Okawara Makoto 
Published: July 2006

Abstract
Bromination of the title compounds 1 resulted in the formation of the corresponding 2-dimethylamino-4-bromomethyl-1,3-dithiolan-2-ylium bromide (2) via regiospecific (S-5) participation by the dithiocarbamate function, irrespective of substitution on the γ-carbon atom. This is in contrast to the C-protonation of 1 in which the ratio of S-5 vs. S-6 depends on the γ-substitution.
α-THIOCARBONYL-STABILIZED PHOSPHORANES: STRUCTURE AND ALKYLATION REACTION OF ALKOXYTHIOCARBONYLMETHYLENETRIPHENYLPHOSPHORANES
Authors: Yoshida Hiroshi , Matsuura Hironori , Ogata Tsuyoshi , Inokawa Saburo 
Published: July 2006

Abstract
NMR spectra of alkoxythiocarbonylmethylenetriphenylphosphoranes (II; R=Me, Et, i-Pr) show existence of cis and trans isomers. Alkylation of II took place exclusively at sulfur in quantitative yields. The effects of solvents and alkylating reagents on the products ratio (IIIcis/IIItrans)were also studied.
PHOTOELECTRON SPECTRUM OF DISPIRO[2.2.2.2]DECA-4,9-DIENE. CONJUGATION OF WALSH ORBITALS OF CYCLOPROPANE RINGS WITH ORBITALS OF DIENE
Authors: Harada Yoshiya , Ohno Koichi , Seki Kazuhiko , Inokuchi Hiroo 
Published: July 2006

Abstract
To study the interaction between the Walsh orbitals of cyclopropane rings and its adjacent π-orbitals the photoelectron spectrum of dispiro[2.2.2.2]deca-4,9-diene has been measured by using the 21.22 eV helium resonance line. The first four bands in the PE spectrum have been assigned on the basis of a modified CNDO/2 approximation.
SYNTHESES TOTALES DE L’ACIDE (dl)-CARPAMIQUE ET DE L’ACIDE (dl)-ISO-3 CARPAMIQUE
Authors: Brown Eric , Bourgouin André 
Published: July 2006

Abstract
Hydrolysis of the bis-lactonic alkaloid carpaine 1 is known to yield all-cis 6-(7-carboxy hept-1-yl) 2-methyl piperidin-3-ol 2 (carpamic acid). The first recorded total synthesis is described of (dl)-carpamic acid in five steps, starting from the known β-keto ester Me2C=CH–CH2–CH2–CO–CH2COOEt.
SYNTHESIS AND REACTIONS OF YLIDIC THIABENZENES
Authors: Hori Mikio , Kataoka Tadashi , Shimizu Hiroshi , Narita Ken’ichi , Ohno Sachio , Aoki Harumi 
Published: July 2006

Abstract
Synthesis and structure of novel ylidic thiabenzenes, 1-cyano-and benzoyl-2-methyl-2-thianaphthalenes (VI and X), are discussed. The reactions of VI with several electrophiles such as dimethyl acetylenedicarboxylate, methyl propiolate, diphenylcyclopropenethione, and diphenylcyclopropene are described together with the mechanisms of the reactions.
NEW CYCLIC α-KETOSULFENES
Authors: Tsuge Otohiko , Noguchi Michihiko 
Published: July 2006

Abstract
New cyclic α-ketosulfenes 2 and 8 were generated in situ from the treatment of 2-chlorosulfonyl-1-tetralone (1) and -1-indanone (7) with NEt3. It was found that these two α-ketosulfenes show different characteristics in their dimerization and cycloaddition reactions.
FURTHER EVIDENCE OF INVERSION MECHANISM FOR THE CIS-TO-TRANS THERMAL ISOMERIZATION OF 4-DIMETHYLAMINOAZOBENZENE DERIVATIVES. ADDITIVITY RULE OF SUBSTITUENT CONSTANTS
Authors: Sueyoshi Toshinobu , Nishimura Norio , Yamamoto Shunzo , Hasegawa Shigeo 
Published: July 2006

Abstract
The thermal cis-to-trans isomerization of some substituted 4-dimethylaminoazobenzenes was studied. Substituent effects on the isomerization rate strongly support the view that the isomerization proceeds via inversion at either one of the azo-nitrogen atoms.
THE REACTION OF TETRATHIOFULVALENES WITH 2,3-DICHLORO-5,6-DICYANO-p-BENZOQUINONE. NEW STABLE CATION- and ANION-RADICAL COMPLEXES
Authors: Ueno Yoshio , Okawara Makoto 
Published: July 2006

Abstract
Tetrathiofulvalene derivatives Ia-e reacted with an equimolar amount of 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) in hot acetonitrile or benzene to give new stable cation-radical and anion-radical complexes IIa-e, which had various mole ratios (1:1, 1:2, 2:1).
ONE-STEP SYNTHESIS OF A NEW HETEROCYCLE, 6-METHYLENE-4,7-DIOXABICYCLO[3.2.1]OCT-2-ENE
Authors: Toda Fumio , Fujikawa Masazumi 
Published: July 2006

Abstract
The reactions of 2,2-dibenzoylpropane (Ia) and 1,1-dibenzoylcyclopentane (Ib) with two molar amounts of sodium acetylide in liquid ammonia afforded 8,8-dimethyl-6-methylene-1,5-diphenyl-4,7-dioxabicyclo[3.2.1]oct-2-ene (IIIa) and 6-methylene-1,5-diphenyl-4,7-dioxabicyclo[3.2.1]oct-2-ene-8-spirocyclopentane (IIIb), respectively. Some reactions of III were described.
CATALYSIS BY IRON-POLYPHTHALOCYANINE. REDUCTIVE DEHALOGENATION OF α-CHLORODEOXYBENZOIN WITH 1-BENZYL-1,4-DIHYDRONICOTINAMIDE
Authors: Inoue Hiroo , Aoki Ryuji , Imoto Eiji 
Published: July 2006

Abstract
Iron-polyphthalocyanine catalyzed the reductive dehalogenation of α-chlorodeoxybenzoin with 1-benzyl-1,4-dihydronicotinamide in benzene or 80 vol% aqueous methanol. The accelerating activity of the iron-polyphthalocyanine became larger as compared with those of various iron complexes under the similar condition.
HYPOCHROMISM OF VINYLPOLYMERS WITH LARGE PENDANT π-ELECTRON SYSTEMS
Authors: Okamoto Ken-ichi , Itaya Akira , Kusabayashi Shigekazu 
Published: July 2006

Abstract
The absorption spectra of vinylpolymers with large pendant π-electron systems show the hypochromism, change in the structure of the 1Bb or 1Ba band, and lower (or higher)-frequency shift in comparison with the spectra of the monomeric models. These arise from some electronic interactions between neighboring chromophores in a polymer chain.
HETERA-p-CARBOPHANES. V. EFFECT OF OXYGENATION OF SULFUR ON THE ROTATIONAL BARRIER IN A THIAPARACYCLOPHANE DERIVATIVE
Authors: Sakamoto Kazuhiko , Oki Michinori 
Published: July 2006

Abstract
Dynamic nuclear magnetic resonance study of 17,20-dimethyl-3,13-dioxa-8-thia-2,14-dioxo[15]paracyclophane and its oxygenated derivatives revealed that the barrier to rotation of the aromatic ring increased in the order of sulfide &lt;sulfoxide&lt;sulfone. Transannular interaction of the charge transfer type is discussed as a possible cause for the change in barriers.
ON THE STRUCTURES OF THE FRFF RADICAL PRODUCTS FORMED BY THE REACTION OF DEHYDROASCORBIC ACID WITH AMINO ACIDS
Authors: Yano Midori , Hayashi Tateki , Namiki Mitsuo 
Published: July 2006

Abstract
In addition to the radical products of a triplet esr signal (R-A) and a quintet-doublet (R-B), a new radical product of multiplet signal was isolated from tic of the reaction mixture of dehydroascorbic acid with an amino acid. Structures were postulated for these radical products based on the esr spectral analysis and their properties in relation with the red pigment.
BRILLOUIN SCATTERING SPECTRA OF SURFACTANT SOLUTIONS
Authors: Okabayashi Hirofumi , Okuyama Masataka , Matsuura Hiroatsu , Miyazawa Tatsuo 
Published: July 2006

Abstract
Brillouin scattering was measured for aqueous solutions of potassium n-hexanoate and potassium n-octanoate. The sound velocity in the surfactant solutions increased successively with an increase in surfactant concentration, but it became almost constant at the critical micelle concentration.
THE NEW MICHAEL REACTION
Authors: Narasaka Koichi , Soai Kenso , Mukaiyama Teruaki 
Published: July 2006

Abstract
It was found that silyl enol ethers react with α,β-unsaturated ketones and esters in the presence of TiCl4 under mild (−78°C) conditions to give 1,5-dicarbonyl compounds in good yields. Further, it was also found that 1-phenyl-1,5-hexanedione and its monoacetal were obtained by the TiCl4-promoted reaction of methyl vinyl ketone ethylene acetal with α-trimethylsiloxystyrene.
A NEW SYNTHETIC METHOD FOR β-SUBSTITUTED Δα,β-BUTENOLIDES
Authors: Iwai Kiyoshi , Kosugi Hiroshi , Uda Hisashi 
Published: July 2006

Abstract
α-Phenylsulfinyllactones 2 underwent the Pummerer rearrangement and subsequent elimination of acetic acid by treating with hot acetic anhydride to give α-phenylthiobutenolides 4. Conjugate addition reaction of 4 with organocopper reagents or malonic ester followed by oxidation to sulfoxides and pyrolysis afforded β-monosubstituted or β,γ-disubstituted butenolides 6 in moderate overall yields.
NOVEL FORMATION OF AROMATIC NITRILES BY FRIEDEL-CRAFTS REACTION IN NITROMETHANE
Authors: Yoshifuji Masaaki , Tanaka Susumu , Inamoto Naoki 
Published: July 2006

Abstract
Mesitylene and benzene gave the corresponding nitriles by reaction with anhydrous aluminum chloride and nitromethane at 80°C, together with the corresponding aldoximes.
FREE RADICAL PRODUCT FORMED BY THE REACTION OF DEHYDROASCORBIC ACID WITH AMINO ACIDS
Authors: Namiki Mitsuo , Yano Midori , Hayashi Tateki 
Published: July 2006

Abstract
A short time heating of the reaction mixture of dehydroascorbic acid and amino acid was found to give a fairly stable free radical product(s) which could be isolated on tic as a blue fraction and showed the hyperfine esr spectra.
APPLICATIONS OF ADIABATIC RAPID PASSAGE TO CORRELATION NMR SPECTROSCOPY. I. SOLVENT LINE SUPPRESSION
Authors: Arata Yoji , Ozawa Hiroshi 
Published: July 2006

Abstract
An adiabatic rapid passage method has been proposed for eliminating unwanted lines in correlation NMR spectroscopy. As illustrative examples, correlation NMR spectra of bovine pancreatic ribonuclease A and HEW lysozyme are given where the HDO line is suppressed by the present technique.
NMR STUDY OF AMINO ACIDS AND THEIR DERIVATIVES: DISSOCIATION CONSTANT OF EACH ROTATIONAL ISOMER OF AMINO ACIDS
Authors: Fujiwara Shizuo , Ishizuka Hidehiro , Fudano Shintaro 
Published: July 2006

Abstract
Dissociation constants of each of the three rotational isomers of amino acids, l-serine, l-aspartic acid, l-histidine and l-phenylalanine have been determined by the use of the fractional weights obtained from the NMR coupling constants at several pH values.
NATURE OF ORDERED STRUCTURE OF UNIONIZED POLY-γ-GLUTAMIC ACID STUDIED BY POTENTIOMETRIC TITRATION METHOD
Authors: Homma Etsuko , Ogawa Kozo , Watanabe Takehiko 
Published: July 2006

Abstract
The potentiometric titration of poly-γ-glutamic acid in aqueous solutions has been studied. The results indicate the conformational transition of this polymer in pH 3 to 5, in agreement with the data obtained by ORD and viscosity measurements. The standard free energy change of the conformational transition ΔG°, standard enthalpy change ΔH° and standard entropy change ΔS° were obtained. The results indicate that the content of the ordered structure in unionized state is small compared with the case of normally presented ordered form of α-polypeptides.