bluuebunny/crossref_metadata_2025_split huggingface dataset:
THE EFFECT OF EXTERNAL MAGNETIC FIELD ON PHOTOCHEMICAL FREE RADICAL REACTIONS. THE SINGLET AND TRIPLET SENSITIZED PHOTOLYSIS OF DIBENZOYL PEROXIDE
Authors: Sakuragi Hirochika , Sakuragi Masako , Mishima Tamako , Watanabe Shoji , Hasegawa Masaki , Tokumaru Katsumi 
Published: July 2006

Abstract
Application of external magnetic field (0–14 kG) on the singlet and triplet sensitized photolysis of dibenzoyl peroxide scarcely affects the yield of phenyl benzoate resulting from cage recombination between benzoxyl and phenyl radicals, suggesting that only a slight fraction of the geminate product arises from radical pairs which can suffer the effect of magnetic field.
MICELLAR EFFECT ON THE PREPARATION OF POLY-β-ALANINE FROM β-ALANINE-S-ALKYL ESTERS
Authors: Kawabata Yasuziro , Kinoshita Masayoshi 
Published: July 2006

Abstract
S-Dodecyl, S-decyl, and S-octyl esters of β-alanine were reacted in water in the presence of a base at 100°C for 40 hours to give poly-β-alanine. The yields and the degrees of polycondensation for dodecyl, decyl, and octyl esters were 44, 24, and 2 % and 13, 12, and 20, respectively. Poly-β-alanine was not obtained from S-hexyl and S-ethyl esters. The specific acceleration of polycondensation reaction for the higher alkyl esters was explained by micellar effect.
A NEW ROUTE TO AMINONITRILES VIA CYANOSILYLATION OF SCHIFF BASES AND OXIMES
Authors: Ojima Iwao , Inaba Shin-ichi , Nakatsugawa Kimiyo , Nagai Yoichiro 
Published: July 2006

Abstract
Trimethylsilyl cyanide was found to react with Schiff bases and oximes in the presence of a catalytic amount of Lewis acids to afford N-trimethylsilyl-α-aminonitriles and N-trimethylsilyloxy-α-aminonitriles in excellent yields, which were easily hydrolyzed to the corresponding α-aminonitriles and α-hydroxyaminonitriles.
SYNTHESIS AND PROPERTIES OF TRIS(3-HYDROXY-2-METHYL-4-PYRONATO) COMPLEXES OF CHROMIUM(III), MANGANESE(III) AND IRON(III)
Authors: Morita Hideyoshi , Hayashi Yasuhisa , Shimomura Shigeru , Kawaguchi Shinichi 
Published: July 2006

Abstract
Tris(3-hydroxy-2-methyl-4-pyronato)complexes of chromium(III), manganese(III) and iron (III) have been prepared. Comparison of their IR spectra suggests that a Jahn–Teller distortion is operative in the Mn(III) complex. The electronic spectrum of this complex is also consistent with a tetragonal structure caused by the Jahn–Teller effect.
THE REACTION OF LITHIUM TRIBUTYL-1-PROPYNYLBORATE WITH OXIRANE. STEREOSELECTIVE SYNTHESIS OF (Z)- AND (E)-3-METHYL-3-OCTEN-1-OL
Authors: Utimoto Kiitiro , Furubayashi Toshiki , Nozaki Hitosi 
Published: July 2006

Abstract
The title reaction in dichloromethane affords (Z)-3-methyl-3-octen-1-ol in good yield after the usual protonolysis, while the predominant product in THF has been found to be the (E)-isomer.
SOLVENT EFFECT ON THE REACTION OF 2,6-DIBROMOCYCLOHEXANONE WITH MORPHOLINE
Authors: Sato Kikumasa , Inoue Seiichi , Ohashi Masao , Kuranami Shin-ichi 
Published: July 2006

Abstract
The reaction of 2,6-dibromocyclohexanone (1)with morpholine gives 1-cyclopentenecarboxymorpholide (2) and 2-morpholino-2-cyclohexenone (3) . The ratio of 2 :3 is remarkably affected by the reaction solvent, and the amide 2 or the enaminoketone 3 is obtained selectively when chloroform or HMPA was used, respectively.
CYCLOADDITION REACTIONS OF 1,3-OXAZEPINE AND 1,2-DIAZEPINES TO 2,5-DIMETHYL-3,4-DIPHENYLCYCLOPENTADIENONE
Authors: Mukai Toshio , Yamashita Yoshiro , Sukawa Hiroshi , Tezuka Takahiro 
Published: July 2006

Abstract
This report describes the first example of a cycloaddition reaction of 1,3-oxazepine derivatives. 2-Phenyl-l,3-oxazepine (I) added thermally to 2,5-dimethyl-3,4-diphenylcyclopentadienone (II) to give [4+2] adducts IV and V. Irradiation of V afforded VI, a novel type of the cage compound containing oxygen and nitrogen atoms. For comparison, the cycloaddition reactions of N-substituted 1H-1,2-diazepines (IIIa and IIIb) and lH-azepine (XII) were examined.
DEPOLARIZATION RATIOS OF I2 RAMAN LINES IN THE RESONANCE REGION
Authors: Matsuzaki Susumu , Maeda Shiro 
Published: July 2006

Abstract
Depolarization ratio(ρl) of I2 Raman lines in the resonance region was observed in several solutions, and appreciable dependence of ρl. on exciting wavelengths was found out. The origin of the observed ρl changes was discussed on the basis of the composite nature of the visible band.
γ-RADIOLYSIS OF AN OLEFIN-LIQUID CARBON DIOXIDE MIXTURE
Authors: Sakurai Hiroshi , Akimoto Koichi , Toki Susumu , Takamuku Setsuo 
Published: July 2006

Abstract
Radiolysis of an aliphatic olefin(0.01 mol)-liq. CO2(1 mol) mixture has been investigated at room temperature. The main products were the corresponding epoxide and carbonyl compounds. A biradical intermediate which is formed by addition of oxygen atom to olefinic double bond is proposed. The nature of the oxidizing species is discussed.
NUCLEAR MAGNETIC RESONANCE STUDY OF EXCHANGING SYSTEMS. VII. 13C NMR SPECTRA OF BARBARALONE AND ITS DEGENERATE COPE REARRANGEMENT
Authors: Nakanishi Hiroshi , Yamamoto Osamu 
Published: July 2006

Abstract
13C NMR spectra of barbaralone were measured at several temperatures. Spin-lattice relaxation times and nuclear Overhauser enhancement factors were also determined. Complete line shape analyses of 13C spectra were made by the simulation method to obtain the accurate activation parameters of the Cope rearrangement of barbaralone.
PHOTOCHEMICAL REACTION OF 3-HEXENE-2,5-DIONE WITH TETRAMETHYLETHYLENE: STEREOSPECIFIC SYNTHESIS OF TRANS-1,2-DIACETYL-3,3,4,4-TETRAMETHYLCYCLOBUTANE
Authors: Yoshida Zen-ichi , Kimura Makoto , Yoneda Shigeo 
Published: July 2006

Abstract
Photochemical reaction of 3-hexene-2,5-dione (1) with tetramethylethylene has been found to lead to stereospecific formation of trans-1,2-diacetyl-3,3,4,4-tetramethylcyclobutane. No evidence for oxetane formation has been obtained.
A NEW SYNTHESIS OF ETHYL CYCLOPENTADIENE FROM CYCLOPENTADIENE AND ETHYLENE
Authors: Akimoto Masamichi , Minomiya Ei-ichi , Echigoya Etsuro 
Published: July 2006

Abstract
An equimolar mixture of 1-, and 2-ethyl cyclopentadiene was formed in vapor-phase thermal reaction of cyclopentadiene with ethylene.
VAPOR GROWTH OF ZnO NEEDLE CRYSTALS
Authors: Kodaira Kohei , Matsushita Toru , Saito Junji , Yoshida Ryoichi 
Published: July 2006

Abstract
Needle crystals of zinc oxide were obtained by the oxidation of zinc vapor produced from the reduction of ZnO powder with carbon. The reduction of ZnO powder was the rate-determining step in the crystal growth. The growth direction of the crystals was along a-axis.
STUDIES ON HYDROXY AMINO ACIDS V. SYNTHESIS AND N-ACYLATION OF 3-METHYL-l-AZYLYLGLYCINE BENZYL ESTER
Authors: Okawa Kenji , Nakajima Kiichiro , Tanaka Takumi , Kawana Yuriko 
Published: July 2006

Abstract
Optically active 3-methyl-l-aziridinecarbonyl glycine ester was successfully obtained from the corresponding N-trityl derivative by the careful treatment with formic acid and Z-Gly-3-Me-l-Azy-Gly-OBzl was also prepared without cleavage of aziridine ring by the usual DCC method.
SYNTHESIS OF 2-HYDROXYDENDROBINE AND NOBILINE
Authors: Suzuki Masaaki , Yamada Kiyoyuki , Hirata Yoshimasa 
Published: July 2006

Abstract
An efficient method of introducing a hydroxy group at the C-2 position of the dendrobine skeleton using a keto lactam (1) is described. By means of this method 2-hydroxydendrobine (9) was synthesized from a keto lactam (4). Further, 2-hydroxydendrobine was transformed into nobiline (10).
HETERA-p-CARBOPHANES. VI. LONG-RANGE ASYMMETRY EFFECT ON THE PROTON MAGNETIC RESONANCE SPECTRUM IN DIOXATHIA[17]PARACYCLOPHANES
Authors: Sakamoto Kazuhiko , Oki Michinori 
Published: July 2006

Abstract
PMR spectrum of a dioxathia[17]paracyclophane derivative showed the nonequivalence of protons of methylene groups which are separated by 8 bonds from an aromatic ring constituting the center of plane asymmetry. The barrier to rotation of the aromatic ring was obtained as 11–12 kcal/mol.
REDUCTION OF AZOBENZENE AND BENZYLIDENEANILINE BY THE COMBINED USE OF COPPER AND N,N-DIETHYLDITHIOCARBAMIC ACID
Authors: Sato Toshio , Inoue Tan , Mukaiyama Teruaki 
Published: July 2006

Abstract
Azobenzene or benzylideneaniline was reduced by the combined use of copper and N,N-diethyldithiocarbamic acid to afford hydrazobenzene or 1,2-dianilino-1,2-diphenylethane in good yield, respectively.
THE REACTIONS OF N,N-DICHLOROAMINE AND -AMIDES WITH IRON CARBONYL COMPLEXES. METAL-ASSISTED NITRENE GENERATION
Authors: Suzuki Hiroharu , Itoh Kenji , Matsuda Isamu , Ishii Yoshio 
Published: July 2006

Abstract
Reactions of N,N-dichloroamine or -amides with diiron enneacarbonyl yield isocyanates via carbonylation of iron nitrenoid. N,N-Dichloro-p-chlorobenzamide gives complex whose composition is (p-Cl–C6H4–CO–N)2Fe(CO)2(maleic anhydride)Cl2 in the reaction with maleic anhydride iron tetracarbonyl in an excellent yield.
SYNTHESIS OF THE FLUORIDE GARNETS {Na3}[M23+](Li3)F12 (M=Al, Cr, Fe)
Authors: Naka Shigeharu , Takeda Yasuo , Sone Masahiro , Suwa Yoshiko 
Published: July 2006

Abstract
The synthesis of the fluoride garnets, {Na3}[M23+](Li3)F12, in aqueous solution is studied. The garnet for M=Al obtained is identical with that prepared in the solid reaction. Garnets for M=Cr and Fe contain a given amount of water removable at 250° and 235°C, respectively, at temperatures of which the garnet structure remains unaltered but the color and cell constants change.
INFRARED SPECTROSCOPIC STUDIES ON THE SHIFT REAGENT-SUBSTRATE COMPLEXES
Authors: Hirota Minoru , Otsuka Soichi 
Published: July 2006

Abstract
The shift reagent-substrate complexes were studied by infrared spectroscopic methods. The composition of the Eu(dpm)3-2-methyl-2-propanol complex was determined to be 1:1, and the enthalpy and the entropy of its formation were calculated from the temperature dependence of the intensities of the free and the complexed O–H bands of the alcohol. The ΔH and ΔS are −9.6 kcal·mol−1 and −21 cal·mol−1·deg−1, respectively.
A CARBON-13 NMR STUDY OF THE DIRECTION OF ENOLIZATION OF TRIFLUOROACETYLACETONE
Authors: Niwa Jun , Yamazaki Mitsuru , Takeuchi Tsugio 
Published: July 2006

Abstract
Solvent shifts of the chelated carbonyl carbons of trifluoroacetylacetone reveal the predominance of the enol form which is enolized toward the trifluoroacetyl group.
SOME ADDUCTS OF OXOBIS(ACETYLACETONATO)VANADIUM(IV) WITH PHENOL OR ITS PARA-SUBSTITUTED DERIVATIVES
Authors: Taguchi Hiroshi , Isobe Kiyoshi , Nakamura Yukio , Kawaguchi Shinichi 
Published: July 2006

Abstract
Oxobis(acetylacetonato)vanadium(IV) reacts with phenol or its para-substituted derivatives in methanol, affording a stable adduct of the composition VO(acac)2(p-XC6H4OH), where X=H, NO2, CHO, COOH, Cl or CH3. The magnetic and spectral data reveal that these are vanadium(IV) complexes containing the phenol as a neutral ligand. They show an unusually low ν(V=0) frequency of ∼900 cm−1 compared to a value of 1000 cm−1 for the parent complex, and are presumed to have a polymeric structure with a phenol molecule connecting with an adjacent vanadyl oxygen via the hydrogen bond. The behavior of the adduct in solution is also reported.
WOLFF REARRANGEMENT OF 2-DIAZO-3,4-BIS(DIPHENYLMETHYLENE)CYCLOBUTMONE INTO 1,2-BIS (DIPHENYLMETHYLENE) CYCLOPROPMES
Authors: Ueda Kozaburo , Toda Fumio 
Published: July 2006

Abstract
Irradiation of 2-diazo-3,4-bis(diphenylinethylene)cyclobutanone (2) in the presence of alcohol and amine afforded 1-alkoxycarbonyl- and 1-carbamoyl-2,3-bis(diphenylmethylene)cyclopropane respectively.
ISOMERIZATION OF 1-BUTENE OVER POTASSIUM
Authors: Ikefuji Yoshio , Yoshioka Norihiko , Noumi Hisayuki , Tsuchiya Susumu 
Published: July 2006

Abstract
The isomerization of 1-butene takes place over potassium; trans-2-butene and cis-2-butene are formed. The ratio, trans/cis, was 0.1–0.2 in the temperature range 20–40°C, and was about unity in the range 90–140°C.
MECHANISM FOR NOVEL HOMOLYTIC AROMATIC SUBSTITUTION BY DIPHENYLMETHANIMINYL RADICAL IN PHOTOLYSIS OF BENZOPHENONE O-ACYLOXIMES IN AROMATIC SOLVENTS
Authors: Ishikawa Syun-ichi , Sakuragi Hirochika , Yoshida Masayuki , Inamoto Naoki , Tokumaru Katsumi 
Published: July 2006

Abstract
Irradiation of benzophenone O-acyloximes (I) in benzene or toluene effects aromatic substitution on the solvents by diphenylmethaniminyl radicals (IV) to give N-diphenylmethyleneaniline (II) or N-diphenylmethylenetoluidines (VIII) unless concurrently formed acyloxyl radicals facilely decarboxylate. A mechanism involving a participation of sufficiently lived acyloxyl radicals is proposed for the above substitution reactions.
PHOTOREACTION OF 1,2,4,5-TETRACYANOBENZENE WITH TETRAHYDROFURAN
Authors: Ohashi Mamoru , Tsujimoto Kazuo 
Published: July 2006

Abstract
Irradiation of 1,2,4,5-tetracyanobenzene in tetrahydrofuran underwent photosubstitution to give tetrahydro-2-(2,4,5-tricyanophenyl)furan. The reaction is scarecely affected by trifluoroacetic acid and hence it appears to belong to a novel class of photoelectrophilic substitution.
FREQUENCY RESPONSE METHOD FOR DETERMINATION OF DIFFUSION COEFFICIENT OF HYDROGEN IN METAL
Authors: Sekine Kyoichi 
Published: July 2006

Abstract
A new electrochemical method for the study of the diffusion process of hydrogen in metal foils is proposed. In the bielectrode system when hydrogen charging direct current is overlapped with sinusoidal current, there appears a phase lag in permeation current. This phase lag is related mathematically to the diffusion coefficient D of hydrogen in metal. The values of D obtained by this method are in good agreement with those by other methods in α-phase palladium-hydrogen system.
A PHOTOCHEMICAL REACTION OF 2-ALKOXY-3-BROMO-1,4-NAPHTHOQUINONE WITH 1,1-DIARYLETHYLENE—A NOVEL SYNTHETIC METHOD OF 5-ARYL-7,12-BENZ (a) ANTHRAQUINONES
Authors: Maruyama Kazuhiro , Otsuki Tetsuo 
Published: July 2006

Abstract
5-Aryl-7,12-benz[a]anthraquinone derivatives (6) was obtained in good yields in the photochemical reaction of 2-alkoxy-3-bromo-1,4-naphthoquinone with 1,1-diarylethylene.
AMINOALUMINUM HYDRIDE AS NEW REDUCING AGENTS. III SELECTIVE REDUCTION OF CARBOXAMIDES TO ALDEHYDES
Authors: Muraki Masayoshi , Mukaiyama Teruaki 
Published: July 2006

Abstract
Bis(4-methyl-1-piperazinyl)aluminum hydride was found to be a useful reagent for reduction of various N,N-disubstituted carboxamides, such as N-acylmorpholines and N,N-dimethylcarboxamides, to provide the corresponding aldehydes in fairly good yields.
PHOTO-CONTROL OF ENZYME ACTIVITY WITH A PHOTOCHROMIC SPIROPYRAN COMPOUND —MODIFICATION OF α-AMYLASE WITH SPIROPYRAN COMPOUND—
Authors: Namba Kenryo , Suzuki Shuichi 
Published: July 2006

Abstract
A photochromic α-amylase was prepared by chemical modification with a spiropyran compound and isolated with DEAE-Sephadex chromatography. The modified α-amylase showed the reverse photochromism in water. UV- or VS-light irradiation caused a decrease in enzyme activity of the modified enzyme. The initial activity could be recovered when the modified enzyme irradiated was kept in the dark.
A NOVEL, CYCLOBUTANONE-FORMING CARBENE INSERTION REACTION. TETRACYCLO[7.3.1.02,5.05,10]TRIDECAN-4-ONE FROM 1-(TRICYCLO[5.3.1.03,8]UNDEC-3-YL)-2-DIAZOETHAN-1-ONE
Authors: Takaishi Naotake , Fujikura Yoshiaki , Inamoto Yoshiaki , Ikeda Hiroshi 
Published: July 2006

Abstract
Decomposition of 1-(tricyclo[5.3.1.03,8]undec-3-yl)-2-diazoethan-1-one (IV) in toluene gave predominantly tetracyclo[7.3.1.02,5.05,10]tridecan-4-one (V) under silver oxide catalysis, while tetracyclo-[5.4.1.11,9.05,13]tridecan-11-one (VI) was the major reaction product in the presence of cupric sulfate.
PHOTOINJECTION OF ELECTRONS AND HOLES INTO p-TERPHENYL FROM METALLIC CONTACTS
Authors: Kotani Masahiro , Ohno Shigeru 
Published: July 2006

Abstract
The photoconduction excitation spectrum was measured in the energy range of 1.0–6 eV for p-terphenyl single crystals. The photoconduction by photons hν &lt; 2.4 eV was attributed to the injection of excited holes from the gold electrode. The ionization energy of p-terphenyl was estimated to be 6.0 eV.
CARBOXYLATION REACTION OF ALCOHOLS HAVING SHORT CARBON CHAINS WITH CARBON MONOXIDE IN THE PRESENCE OF HF–SbF5
Authors: Takahashi Yukio , Tomita Nobu , Yoneda Norihiko , Suzuki Akira 
Published: July 2006

Abstract
Alcohols with short carbon chains, one to four, which are not carboxylated under the usual Koch conditions, were carboxylated with carbon monoxide in the presence of HF–SbF5 as a catalyst. This was carried out at temperatures from −20 to 30°C under atmospheric pressure. Except for methanol, such alcohols were found to react readily with carbon monoxide to give corresponding carboxylic acids in high yields.
PHOTOLYSIS AND ASSOCIATION OF 1-BENZYL-4-METHOXYCARBONYLPYRIDINYL
Authors: Ikegami Yusaku , Watanabe Hidetoshi 
Published: July 2006

Abstract
A neutral free radical, 1-benzyl-4-methoxycarbonylpyridinyl is stable in the dark, but decomposes by light irradiation to generate benzyl radical. Association of the radical at low temperature has been investigated.
CIRCULAR DICHROISM OF COBALT(III) COMPLEXES CONTAINING OPTICALLY ACTIVE 1,3-DIPHENYL-1,3-PROPANEDIAMINE
Authors: Arakawa Sumio , Kashiwabara Kazuo , Fujita Junnosuke , Saito Kazuo 
Published: July 2006

Abstract
Four optical isomers of [Co(en)2(rac-dppn)]3+(en = ethylenediamine, rac-dppn = (R,R)- or (S,S)-1,3-diphenyl-1,3-propanediamine) and a pair of enantiomers of [Co(NH3)4(rac-dppn)]3+ were prepared and circular dichroism (CD) spectra obtained. The calculated vicinal effect curve for the dppn in [Co(en)2(dppn)]3+ differs greatly from that in [Co(NH3)4(dppn)]3+. Such a difference was not observed between those of the corresponding new stilbenediamine (stien) complexes, [Co(en)2(l-stien)]3+ and [Co(NH3)4(l-stien)]3+.
NOVEL SYNTHESIS OF THE TAUTOMERIC ISOMER OF THE AZIRINOMYCIN ETHYL ESTER AND ITS ANALOGUES
Authors: Shin Chung-gi , Yonezawa Yasuchika , Yoshimura Juji 
Published: July 2006

Abstract
The new and facile syntheses of ethyl 2-azido-2-alkenoate (4) and ethyl 3-azido-2-alkenoate (5) and the subsequent photolysis or pyrolysis of 4 and 5 to 2-alkyl-3-ethoxycarbonyl-2H-azirines and 3-alkyl-2-ethoxycarbonyl-2H-azirines, respectively, were accomplished.
QUENCHING OF EXCIPLEX WHICH EMITS VERY WEAKLY OR IS NOT EMISSIVE: EVIDENCE FOR EXCIPLEX INTERMEDIACY IN FLUORESCENCE QUENCHING AND PHOTOCYCLOADDITION
Authors: Pac Chyongjin , Sakurai Hiroshi 
Published: July 2006

Abstract
Pyridine quenched the exciplexes of 2-naphthonitrile–2-methylfuran and –2,3-dimethylbut-2-ene which emit very weakly and that of 9-cyanophenanthrene–2,3-dimethylbut-2-ene which is not emissive. There was provided evidence demonstrating that these exciplexes are the intermediates in the photoreactions and reversibly formed.
NUCLEOPHILIC ION PAIRS. FACILE CLEAVAGE OF AN AMIDE SUBSTRATE BY HYDROXAMATE ANIONS
Authors: Shinkai Seiji , Kunitake Toyoki 
Published: July 2006

Abstract
An amide substrate(N-methyl-2,4-dinitroacetanilide) is readily cleaved by tetraethylammcnium hydroxamate ion pairs in dry, aprotic solvents at room temperature, and the reaction is efficiently suppressed by minute amounts of water. This is the first example of efficient nucleophilic catalysis of amide cleavage at ambient conditions.
CONVENIENT SYNTHESES OF ALKYL THIOCYANATES AND ALKYL SELENOCYANATES FROM STERICALLY HINDERED OLEFIN VIA HYDROBORATION. SELECTIVE REACTIONS OF SECONDARY OR TERTIARY ALKYL GROUP IN MIXED TRIALKYLBORANES WITH FERRIC THIOCYANATE OR FERRIC SELENOCYANATE
Authors: Arase Akira , Masuda Yuzuru 
Published: July 2006

Abstract
Mixed trialkylboranes, prepared by the successive reactions of BH3 in THF with a sterically hindered internal olefin and a terminal olefin, reacted with either aqueous ferric thiocyanate or aqueous ferric selenocyanate to give corresponding secondary or tertiary alkyl thiocyanates or selenocyanates selectively.
STEREOCHEMISTRY OF PETASITENINE, THE CARCINOGENIC ALKALOID FROM PETASITES JAPONICUS MAXIM. AND TRANSFORMATION OF PETASITENINE TO SENKIRKINE
Authors: Yamada Kiyoyuki , Tatematsu Hiroshi , Hirata Yoshimasa , Haga Masanobu , Hirono Iwao 
Published: July 2006

Abstract
Stereochemistry at C-18 of petasitenine, the carcinogenic alkaloid isolated from Petasites japonicus Maxim. was established by chemical and spectral means: the structure of petasitenine was thus determined completely, which is represented by (1). Transformation of petasitenine (1) into senkirkine (3) was achieved by low valent tungusten complexes.
MONOMER AND DIMER BANDS IN THE VISIBLE SPECTRUM OF ALKALI METAL DIBENZOSUBERONE KETYL
Authors: Nakamura Kazuo 
Published: July 2006

Abstract
The visible spectra of the alkali metal (M+) dibenzosuberone (D−) ketyl were measured and assigned to the three species, the ion pair D−M+, its ionic dimer (D−M+)2, and the free anion D−. The wave numbers of the absorption maxima are linearly correlated to Z/R, where Z is a cationic charge and R Pauling’s cationic radius. The coordination of dibenzo-18-crown-6 to the cation causes dissociation of (D−M+)2 into a contact ion pair.
HYDROMETALATION AND ISOMERIZATION OF OLEFINS BY THE TITANIUM COMPLEX
Authors: Isagawa Kakuzo , Tatsumi Kimio , Otsuji Yoshio 
Published: July 2006

Abstract
The reagent system generated from Cp2TiCl2(Cp=cyclopentadienyl) and LiAlH4 promoted the catalytic hydrometalation and isomerization of olefins, the catalytic ability of the reagent system for both reactions strongly depending on the composition of two reagents in the reagent system. The hydrometalation occurred in the anti-Markownikoff fashion. By these two catalytic reactions, 1-octene was effectively converted to 1-bromooctane and 2,3-dibromooctane.
A POLYION COMPLEX-SUPPORTED PALLADIUM CATALYST FOR SELECTIVE HYDROGENATION OF CONJUGATED DIOLEFINS TO MONOOLEFINS
Authors: Nakamura Yoshio , Hirai Hidefumi 
Published: July 2006

Abstract
A colloidal palladium supported on the polyion complex composed of polyacrylic acid and polyethylene imine catalyzes highly selective hydrogenation of conjugated diolefins to monoolefins at 30°C under an atmospheric hydrogen pressure.
HOMOLYTIC AROMATIC ipso-SUBSTITUTION IN ARYL ETHERS BY BENZOXYL RADICALS
Authors: Nowada Keiko , Sakuragi Hirochika , Tokumaru Katsumi , Yoshida Masayuki 
Published: July 2006

Abstract
Thermal decomposition of dibenzoyl peroxide and bis(4-substituted benzoyl) peroxides in diphenyl ether or anisole affords phenyl benzoate and 4-substituted benzoates, respectively, arising from ipso-substitution in the aryl ethers by the corresponding benzoxyl radicals.
CHEMICAL TRANSFORMATION OF KAURENE-I. SYNTHESIS OF RING C AND D FUNCTIONALIZED KAURENOIDS
Authors: Fukazawa Nobuyuki , Funamizu Makoto , Kitahara Yoshio , Kato Tadahiro 
Published: July 2006

Abstract
The naturally occurring kaurenoids oxygenated at C11 and C15-positions (II and III) have been selectively synthesized from (−)-kaurene (I).
DECOMPOSITION REACTIONS OF UNSATURATED α-PHENYLSULFONYL-α-DIAZO KETONES
Authors: Kuwajima Isao , Higuchi Yasushi , Iwasawa Hiroyuki , Sato Toshio 
Published: July 2006

Abstract
Thermal decomposition of unsaturated α-phenylsulfonyl-α-diazo ketones afforded various types of cyclization products derived from the phenylsulfonylketene intermediates, along with ones from the usual ketocarbene intermediates, which are dependent closely on the position and alkyl substitution of the olefinic parts.
A GENERAL ASYMMETRIC CYCLIZATION. ASYMMETRIC SYNTHETHIS OF OPTICALLY ACTIVE 2-OXO-5-PYRROLIDINEACETIC ACID DERIVATIVES
Authors: Wakabayashi Toshio , Kato Yoshinori , Watanabe Kenzo 
Published: July 2006

Abstract
Novel asymmetric intramolecular Michael addition by chiral amide anion to α,β-unsaturated ester was performed for the asymmetric synthesis of (S)-2-oxo-5-pyrrolidineacetic acid. The acid was related to (S)-(−)-ecgoninic acid in order to determine its absolute configuration. Much higher diastereoselectivity of the chiral amide than that of the chiral ester was also demonstrated.