bluuebunny/crossref_metadata_2025 huggingface dataset:
FLUORESCENCE DECAY OF 3,3′-DIETHYLTHIACARBOCYANINE IODIDE-SODIUM LAURYL SULFATE SYSTEM: DEAGGREGATION OF THE DYE AND DYE-DETERGENT AGGREGATE FORMATION ABOVE AND BELOW THE CRITICAL MICELLE CONCENTRATION
Authors: Sato Hiroyasu , Kawasaki Masahiro , Kasatani Kazuo , Kusumoto Yoshihumi , Nakashima Nobuaki , Yoshihara Keitaro
Published: July 2006

Fluorescence decay of 3,3′-diethylthiacarbocyanine iodide was studied in aqueous solutions of sodium lauryl sulfate. The large change in decay behavior is attributed to the deaggregation of the dye and the formation of the dye-detergent aggregate above and below the critical micelle concentration, respectively.
ISOLATION OF AMMINE(8-QUINOLINOLATO)COBALT(III) CHLORIDE
Authors: Yamamoto Yoshihisa
Published: July 2006

Tetraammine(8-quinolinolato)cobalt(III) chloride hydrate and diamminebis(8-quinolinolato)cobalt(III) chloride hydrate have been isolated and characterized by analytical and spectroscopic methods.
SYNTHESIS OF HEXA-N,O-ACETYL-Dl-HYDROXYVALIDAMINE
Authors: Ogawa Seiichiro , Chida Noritaka , Suami Tetsuo
Published: July 2006

Dl-(1,3,4/2,5,6)-4-Amino- 6-hydroxymethyl-1,2,3,5-cyclohexanetetrol (Dl-hydroxyvalidamine) was first synthesized as the peracetate, which confirmed the proposed structure of the branched-chain aminocyclitol derived by hydrogenolysis of antibiotic validamycin B, followed by acid hydrolysis.
THE RUTHENIUM COMPLEX-CATALYZED REDUCTION OF KETONES BY FORMIC ACID
Authors: Watanabe Yoshihisa , Ota Tetsuo , Tsuji Yasushi
Published: July 2006

An equimolar mixture of a ketone and formic acid was heated without solvent at 125°C for 3 h in the presence of a catalytic amount of dichlorotris(triphenylphosphine)ruthenium(II) to give the corresponding secondary alcohols in excellent yields.
A FACILE SYNTHESIS OF 4-HYDROXYINDOLE VIA ELECTROCHEMICAL OXIDATIVE C–C COUPLING
Authors: Torii Sigeru , Uneyama Kenji , Onishi Takashi , Fujita Yoshiji , Ishiguro Michihiro , Nishida Takashi
Published: July 2006

4-Hydroxyindole (1a), a useful intermediate for Pindolol (1b), has been prepared via electrooxidative coupling of 1,3-cyclohexadione with ethyl vinyl ether followed by ammonolysis and dehydrogenation.
A ONE-STEP PREPARATION OF 2,3-ANHYDRO-4,6-O-BENZYLIDENE-α-d-ALLOPYRANOSIDE AND -GULOPYRANOSIDE
Authors: Mitsunobu Oyo , Kudo Takashi , Nishida Mitsuru , Tsuda Nobuo
Published: July 2006

Methyl 4,6-O-benzylidene-α-d-glucopyranoside reacted with diethyl azodicarboxylate and triphenylphosphine to give methyl 2,3-anhydro-4,6-O-benzylidene-α-d-allopyranoside and -mannopyranoside with the former predominant, while allyl 4,6-O-benzylidene-α-d-galactopyranoside selectively afforded the corresponding 2,3-anhydroguloside.
THE SYNTHESIS OF NAPHTH[2,1-a]- AND NAPHTH[2,3-a]AZULENES
Authors: Yasunami Masafumi , Yang P W , Kondo Yukio , Noro Yukio , Takase Kahei
Published: July 2006

Naphth[2,1-a]- and naphth[2,3-a]azulenes were synthesized by dehydrogenation of 5,6-dihydronaphth[2,1-a]- and 5,12-dihydronaphth[2,3-a]azulenes which were obtained by the reaction of 2H-cyclohepta[b]furan-2-one with 1- and 2-pyrrolidinyl-3,4-dihydronaphthalenes, respectively.
SYNTHESIS AND PROPERTIES OF 5-CYCLOHEPTATRIENYLIDENE-2(5H)-THIOPHENONE
Authors: Takahashi Kazuko , Sakae Toshisada , Takase Kahei
Published: July 2006

The title compound 3 was prepared in 4 steps starting from 2,5-dibromothiophene in good yield. This synthetic method is advantageous for the easy preparation of the annulenones having an inserted quinonoid ring. The compound 3 is quite stable and proved to have a highly bond-alternated olefinic character on the basis of NMR data and dipole moment.
THE SYNTHESIS AND SOME PROPERTIES OF 1,2-AZULENEQUINONE (1,2-AZULENEDIONE) AND ITS DERIVATIVES
Authors: Morita Tadayoshi , Karasawa Michito , Takase Kahei
Published: July 2006

1,2-Azulenequinones (1,2-azulenediones) (la–c) were synthesized by dehydrogenation of the corresponding 1,2-dihydroxyazulenes (5a–c) which were prepared from 2-acetoxyazulenes (2b,c) by benzoyloxylation followed by hydrolysis. Some chemical and physical properties of la–c are also described.
DISODIUM 2,3,6-TRIBROMO-5-HYDROXYBENZYL 1′, 4-DISTJLFATE, A NEW BROMOPHENOL FROM THE RED ALGA, SYMPHYOCLADIA LATIUSCULA
Authors: Kurata Kazuya , Amiya Takashi
Published: July 2006

A new sulfated bromophenol, disodium 2,3,6-tribromo-5-hydroxybenzyl 1′,4-disulfate has been isolated from the red alga, Symphyocladia latiuscula. Its structure was established from the spectral properties and the chemical transformations.
SELECTIVE EXTRACTION OF ALKALI METAL CATIONS BY A PHOTORESPONSIVE BIS(CROWN ETHER)
Authors: Shinkai Seiji , Ogawa Toshiyuki , Kusano Yumiko , Manabe Osamu
Published: July 2006

A photo-responsive bis(crown ether) with azo-linkage(I) was synthesized. The solvent extraction study with (I) indicated that K+ is efficiently extracted by photo-isomerized cis-(I) but not by trans-(I), resulting in a remarkably large selectivity of trans-(I)/cis-(I) for Na+/K+ (238 fold). This suggests a possibility of photo-control of selective ion-extraction with (I).
PHOTORESPONSIVE MEMBRANES. REGULATION OF MEMBRANE PROPERTIES BY PHOTOREVERSIBLE cis–trans ISOMERIZATION OF AZOBENZENES
Authors: Kano Koji , Tanaka Yasuhiko , Ogawa Teiichiro , Shimomura Masatsugu , Okahata Yoshio , Kunitake Toyoki
Published: July 2006

Photoresponsive membranes have been constructed by incorporating the amphiphatic alkylammonium salts containing azobenzene chromophores into dipalmitoylphosphatidylcholine liposomes.
A MILD DEOXYGENATION OF HETEROAROMATIC N-OXIDES WITH DIPHOSPHORUS TETRAIODIDE
Authors: Suzuki Hitomi , Sato Naofumi , Osuka Atsuhiro
Published: July 2006

When treated with diphosphorus tetraiodide in dichloromethane under gentle reflux, the title N-oxides are easily deoxygenated to the parent bases in good yields.
PHOTOINDUCED ELECTRON TRANSFER BETWEEN AMPHIPATHIC RUTHENIUM(II) COMPLEX AND N,N-DIMETHYLANILINE IN SYNTHETIC BILAYER MEMBRANES AND PHOSPHOLIPID LIPOSOMES
Authors: Nagamura Toshihiko , Takuma Keisuke , Tsutsui Yasuhiro , Matsuo Taku
Published: July 2006

Photoreduction of amphipathic ruthenium(II) complex by N,N-dimethylaniline was studied by the flash photolysis in synthetic bilayer membranes and phospholipid liposomes. Back electron transfer was effectively retarded in these systems. The effect of phase transition on the rate of back electron transfer reaction was different in synthetic bilayers and in liposomes.
THE FACILE SYNTHESIS OF 1- AND 2-ALKYLAZULENES BY THE REACTIONS OF 2H-CYCLOHEPTA[b]FURAN-2-ONES WITH ENAMINES OF ALDEHYDES AND ACYCLIC KETONES
Authors: Yasunami Masafumi , Chen Alice , Yang P W , Takase Kahei
Published: July 2006

The reactions of 2H-cyclohepta[b]furan-2-one and its 3-cyano derivatives with enamines derived from aldehydes and acyclic ketones were investigated. On the reactions, 1- and 2-alkylazulenes were easily synthesized.
PHOTOCHEMICAL SYNTHESIS OF TRICYCLIC 1H-1,2-DIAZEPINES
Authors: Yamashita Yoshiro , Masumura Mituo
Published: July 2006

The photochemical reaction of tricyclic N-iminopyridinium ylides afforded 1H-1,2-diazepines containing novel structures by the selective electrocyclic ring closure followed by ring opening.
SYNTHESIS OF ANTIBIOTIC FORTIMICIN B
Authors: Suami Tetsuo , Honda Yutaka
Published: July 2006

Aminocyclitol antibiotic fortimicin B has been synthesized by condensation of 2,6-bis-N-(2,4-dinitrophenyl)-α-6-epi-purpurosaminyl chloride and 1,2:4,5-di-N,O-carbonylfortamine B, followed by removal of all protective groups.
DEFLUORINATION REACTIONS OF gem-DIFLUORO- AND MONOFLUOROOLEFINS. NOVEL METHODS FOR ONE-CARBON HOMOLOGATIONS OF CARBONYL COMPOUNDS LEADING TO ALDEHYDES, CARBOXYLIC ACIDS, AND ESTERS
Authors: Hayashi Sei-ichi , Nakai Takeshi , Ishikawa Nobuo
Published: July 2006

Defluorinative hydrolysis (or alcoholysis) of gem-difluoroolefins (1) easily prepared via the facile difluoromethylenation of carbonyl compounds afforded the carboxylic acids (or esters). The homologation method was applied to the synthesis of anti-inflammatory ibuprofen. Furthermore, defluorinative hydrolysis of monofluoroolefins obtained via the reduction of 1 gave the aldehydes.
REDUCTION OF COORDINATED DINITROGEN IN cis-W(N2)2(PMe2Ph)4 BY MEANS OF ACIDIC HYDRIDOMETAL CARBONYLS, H2Fe(CO)4 AND HFeCo3(CO)12
Authors: Nishihara Hiroshi , Mori Takehiko , Saito Taro , Sasaki Yukiyoshi
Published: July 2006

Formation of ammonia and hydrazine was quantitatively analyzed in the reaction of cis-W(N2)2(PMe2Ph)4 with acidic hydridometal carbonyls, H2Fe(CO)4 or HFeCo3(CO)12 after treatment of the products with aqueous KOH.
PHOTOOXIDATION OF SOME MESOIONIC AND RELATED SYSTEMS
Authors: Kato Hiroshi , Tani Kazue , Eurumisawa Haruki , Tamura Yoshiko
Published: July 2006

Photooxidation of several mesoionic compounds gave ring cleavage products, some of which were apparently formed via the endoperoxides of the mesoionic rings. Photooxidation of a Δ2-oxazolin-4-one and a Δ2-thiazolin-4-one gave the corresponding 4,4′-bisoxa- and bisthiazolinone in dichloromethane, whereas the former gave benzamide in dimethylformamide.
SYNTHESIS OF NOVEL QUINONES WITH SILVER (II) DIPICOLINATE AS A NEW SELECTIVE OXIDANT
Authors: Kloc Krystian , Mlochowski Jacek , Syper Ludwik
Published: July 2006

Benzo- and naphthoquinones bearing oxiranyl or 1,3-dioxolan-2-yl substituents were prepared by oxidative demethylation of appropriate hydroquinone dimethyl ethers with silver (II) dipicolinate. A remarkable selectivity of this silver (II) complex as an oxidizing reagent was demonstrated.
THE SPIROBICHROMAN-DIHYDROXYSPIROBIINDANE REARRANGEMENT
Authors: Tanaka Tsuguo
Published: July 2006

Rearrangement of 2,2′-spirobichroman derivatives having electron donating substituents into 4,4′-dihydroxy-1,1′-spirobiindane analogues was effected by boiling solution of the former in HBr- or HI-HBr-acetic acid.
RHODIUM CATALYZED CARBONYLATION REACTIONS OF CYCLOPROPANES
Authors: Hidai Masanobu , Orisaku Masami , Uchida Yasuzo
Published: July 2006

Cyclopropane was carbonylated by [Rh(CO)2Cl]2 under carbon monoxide pressure to give cyclobutanone, dipropyl ketone, propyl isopropyl ketone, and 2- or 3-methylcyclohexanone. Some other cyclopropane derivatives were also examined. Norcarane gave a small amount of bicyclo[4.2.0]octa-7-one, though phenylcyclopropane did not give any carbonylation products. The formation of polyketone was efficient in the case of methylenecyclopropane.
REMARKABLE CATALYTIC ACTIVITY OF 2-HYDROXYMETHYLIMIDAZOLE-Zn(II) COMPLEXES IN THE HYDROLYSIS OF p-NITROPHENYL PICOLINATE
Authors: Eiki Toshio , Kawada Shuji , Matsushima Kazumi , Mori Mikio , Tagaki Waichiro
Published: July 2006

The zinc complexes of 2-hydroxymethylimidazole derivatives were found to be remarkably active catalysts for the hydrolysis of p-nitrophenyl picolinate. For example, 2-hydroxymethylimidazole is much more active than the 4-hydroxymethyl isomer, and N-benzyl-2-hydroxymethylimidazole is more active than pyridine-2-carboxaldoxime. These results are discussed in relation to the catalyses of zinc containing metalloenzymes.
SULFATE AND NITRATE CONCENTRATION IN AEROSOL ABOVE KANTO AREA
Authors: Murano Kentaro , Izumi Katsuyuki , Mizuochi Motoyuki , Uno Itsushi , Wakamatsu Shinji , Okuda Michio
Published: July 2006

The concentration of sulfate and nitrate in aerosol above Kanto area was measured by aircraft on 6 th and 7 th August 1980 as a survey of photochemical smog. The concentration variation of both ions coincided with that of ozone throughout the field observation. This phenomenon is explained that the formation mechanism of sulfate and nitrate is closely concerned with that of ozone formation. The transport of ozone, sulfate and nitrate is governed mainly by Sagami Bay sea breeze and Kashima Nada sea breeze.
MASS SPECTROMETRIC DETERMINATION OF SPIN ADDUCTS IN SPIN TRAPPING TECHNIQUE
Authors: Suezawa Hironori , Abe Kazuhisa , Hirota Minoru , Ishii Tetsuo
Published: July 2006

The GC/MS(MC) technique was shown to be applicable to identify various kinds of free radicals trapped by α-aryl N-t-butyl nitrones. When spin adducts are unstable under the conditions for measurement, they were trimethylsilylated on the nitroxyl oxygen atom, which makes GC/MS measurement possible.
COMPLEX FORMATION OF EUROPIUM WITH THENOYLTRIFLUOROACETONE AND TRI-n-OCTYLPHOSPHINE OXIDE IN MICELLAR SOLUTION OF NONIONIC SURFACTANT
Authors: Taketatsu Tomitsugu
Published: July 2006

The distribution behavior of europium between micellar and bulk phases was investigated in aqueous solutions of europium-TTA and europium-TTA-TOPO complexes with nona-oxyethylene dodecyl ether by spectrophotofluorimetric method. Apparent equilibrium constants of these complexes were estimated.
THE C-4 CONFIGURATION AND 13C NMR SIGNALS OF HERQUEINONE FROM PENICILLIUM HERQUEI
Authors: Suga Takayuki , Yoshioka Takamitsu , Hirata Toshifumi , Aoki Tadashi
Published: July 2006

The C-4 configuration of herqueinone was determined to be s on the basis of the anisotropic effect of the carbonyl group at the 5-position on the geminal dimethyl groups in the 1H NMR spectra. Also, the full assignment of the 13C NMR signals of herqueinone was established by the selective 1H decoupling and the 13C-labeling techniques.
A NEW SYNTHESIS OF SULFIDES FROM THIOLS AND ALDEHYDES OR KETONES WITH PYRIDINE-BORANE IN TRIFLUOROACETIC ACID
Authors: Kikugawa Yasuo
Published: July 2006

A mixture of thiols and aldehydes or ketones was converted into sulfides with pyridine-borane in trifluoroacetic acid.
STEREOSPECIFIC SYNTHESIS OF (±)-β-SANTALOL
Authors: Sato Kikumasa , Miyamoto Osamu , Inoue Seiichi , Honda Kiyoshi
Published: July 2006

A stereospecific synthesis of 1-acetoxy-5-bromo-2-methyl-2-cis-pentene in 4 steps starting from 3-formyl-5,6-dihydro-2H-pyran, dimer of acrolein, followed by alkylation of 2-ethoxycarbonyl-3-methylbicyclo[2.2.1]hept-2-ene with the bromide furnished a facile synthesis of (±)-β-santalol.
REDUCTION OF N-METHYLACRIDINIUM ION BY 3-AMINOCARBONYL-N-BENZYL-1,4-DIHYDROQUINOLINE: SUPPORTING EVIDENCE FOR THE MULTI-STEP MECHANISM OF THE NADH MODEL REDUCTION
Authors: Shinkai Seiji , Tsuno Takaharu , Manabe Osamu
Published: July 2006

The reduction of N-methylacridinium ion by 3-aminocarbonyl-N-benzyl-1,4-dihydroquinoline showed the isotope effect discrepancy. The result supports the multi-step hydrogen transfer mechanism.
REARRANGEMENT OF 1,3-BROMOCHLOROPROPANE ON ACTIVATED ALUMINA
Authors: Shinoda Kiyonori , Yasuda Kensei
Published: July 2006

The rearrangement of 1,3-bromochloropropane (BCP) on activated alumina was carried out at 160 – 280°C. This reaction proceeded as follows. Br(CH2)3Cl \leftrightarrows Br(CH2)3Br + Cl(CH2)3Cl It was suggested that the acidic sites of alumina played an important role in the rearrangement of halogen atom.
ELECTRON TRANSFER PROCESSES IN THE REACTION OF PHENOTHIAZINE AND 10-METHYLPHENOTHIAZINE WITH 2,2′-AZOBISISOBUTYRONITRILE
Authors: Fujihara Hisashi , Fuke Shunichi , Yoshihara Masakuni , Maeshima Toshihisa
Published: July 2006

Electron transfer processes in the reaction of phenothiazine and 10-methylphenothiazine with 2,2′-azobisisobutyronitrile have been examined by UV and ESR spectroscopies. The reaction was found to proceed via one electron transfer from phenothiazine derivatives to a cyanoisopropyl radical.
NEW SYNTHESIS OF 1,3-DIMETHYL-7-HYDROXYPYRROLO[3,2-d]PYRIMIDINE-2,4(1H,3H)-DIONES (9-HYDROXY-9-DEAZATHEOPHYLLINES)
Authors: Yoneda Fumio , Motokura Miyuki , Otagiri Masaki
Published: July 2006

Treatment of 5-nitro-1,3,6-trinitrouracil with aryl aldehydes in the presence of piperidine causes the condensation to the 5-nitro-6-styryluracil derivatives, followed by the intramolecular cyclization including piperidine-catalyzed oxidation-reduction to give rise to the corresponding 1,3-dimethyl-7-hydroxypyrrolo[3,2-d]pyrimidine-2,4(1H,3H)-dione (9-hydroxy-9-deazatheophylline) derivatives in a single step. Some properties of these compounds are discussed.
A SYNTHESIS OF OPTICALLY ACTIVE NATURAL EVODONE
Authors: Masaki Yukio , Sakuma Kazuhiko , Hashimoto Kinji , Kaji Kenji
Published: July 2006

(−)-Evodone, an optically active natural furano-monoterpene was synthesized from R-(+)-citronellic acid.
ONE-STEP SYNTHESIS OF HOMOTERPENOIC CARBOXYLIC ACIDS FROM β-ISOPROPENYL-β-PROPIOLACTONE AND ORGANOCOPPER REAGENTS
Authors: Fujisawa Tamotsu , Sato Toshio , Kawashima Masatoshi , Nakagawa Masakuni
Published: July 2006

Regioselective reaction of Grignard reagents in the presence of a copper(I) catalyst or of organocuprates with the terminal vinyl carbon of β-isopropenyl-β-propiolactone through the SN2′ pathway affords 4-methyl-3-alkenoic acids in which the (E)-isomers predominate in good yields. Synthetic utility of this reaction is demonstrated in one-step synthesis of homoterpenoic carboxylic acids.
THE PHOTOCATALYTIC DEHYDROGENATION OF 2-PROPANOL BY USING RhCl(PPh3)3
Authors: Arakawa Hironori , Sugi Yoshihiro
Published: July 2006

RhCl(PPh3)3 (Wilkinson complex) catalyzes the dehydrogenation of 2-propanol under the photo-irradiation at room temperature. The catalytic activity of the reaction mixture including 2-propanol and this complex is very high, especially in the case of the preparation of this mixture under the oxygen atmosphere, and has the maximum value at the special concentration range of this complex.
PERFLUOROALKYLTIN(IV) HALIDES: A NOVEL PERFLUOROALKYLATING AGENT FOR CARBONYL COMPOUNDS
Authors: Kitazume Tomoya , Ishikawa Nobuo
Published: July 2006

Perfluoroalkyltin(IV) halides (RfSnX2I) were prepared in situ by the oxidative addition of perfluoroalkyl iodides to tin(II) halide in N,N-dimethylformamide. Aldehydes and ketones readily reacted with RfSnCl2I giving perfluoroalkylcarbinols in the N,N-dimethylformamide-pyridine system. RfSnF2I, however, did not undergo the reactions with these carbonyl compounds.
THE CONTRIBUTION OF LATTICE OXYGEN ATOMS OF PRASEODYMIUM OXIDE TO ITS CATHODIC PERFORMANCE
Authors: Takasu Yoshio , Matsuda Yoshiharu , Yamashita Katsumi
Published: July 2006

The cathodic performance of praseodymium oxide systems (PrO2.0, PrO1.83, and PrO1.71) was examined galvanostatically in a mixed solvent of propylene carbonate and 1,2-dimethoxyethane containing LiClO4 at 25 °C. The cathode potential becomes more positive and decays more slowly for the praseodymium oxide with higher oxygen contents.
THE BIRCH REDUCTION OF 2-ACYLTHIOPHENES. SYNTHESIS OF 1,3-DIENYL KETONES FROM 2-ACYLTHIOPHENES
Authors: Kosugi Kimihiko , Anisimov Alexander V , Yamamoto Hiroshi , Yamashiro Ryuichi , Shirai Kozo , Kumamoto Takanobu
Published: July 2006

The Birch reduction of 2-acyl or 2-acyl-5-alkylthiophenes and subsequent alkylation by alkyl halides gave 2-acyl-2-alkyl or 2-acyl-2,5-dialkyl-2,5-dihydrothiophenes in good yields. Further, 1,3-dienyl ketones were obtained in good yields by the thermolysis of 2,5-dihydrothiophene 1,1-dioxides which were obtained by the oxidation of resulted dihydrothiophene derivatives with m-chloroperbenzoic acid.
SYNTHESIS AND LUMINESCENCE PROPERTIES OF TRIS(BIPYRIDINE)RUTHENIUM(II)-CONTAINING VINYL POLYMERS
Authors: Furue Masaoki , Sumi Katsuhiro , Nozakura Shun-ichi
Published: July 2006

The luminescence properties of poly[Ru(bpy)2(6-vinyl-bpy)-co-6-vinyl-bpy],(I) were compared with those of Ru(bpy)32+ at 77–298 K. A larger depletion of luminescence intensity and lifetime was observed in I in fluid solution. The dynamic quenching processes were suggested to be the dominant factor for the energy dissipation in I.
FT-IR SPECTROSCOPY OF CHEMICALLY BONDED SILICA GEL FOR HIGH PERFORMANCE LIQUID CHROMATOGRAPHY
Authors: Watanabe Noriyuki
Published: July 2006

The surfaces of the silica gels modified with Boc-amino acid were characterized by using FT-IR spectroscopy. It was proved that the formation of covalent bonding between Boc-amino acid and aminated silica gel occured.
SELECTIVE ZINC DEPOSITION ONTO METAL-LAMINATED ORGANOPOLYMERIC FILM
Authors: Maruyama Kazunori , Ohno Shin
Published: July 2006

The photo- and electron-exposures affected zinc vapour deposition onto a surface of metal-laminated polymeric film. In the copper-laminated polymethyl methacrylate film containing tetrabromomethane, ultra-violet rays and electron exposures caused the liberation of hydrogen bromides which reacted with surface copper to give copper(I) compounds. The thickness of the deposited zinc is related to the amount of copper(I) compounds produced on the surface.
THE HIGH SPIN SPECIES IN SOLUTION OF DEUTEROHEMIN WITH TWO IMIDAZOLES COVALENTLY LINKED TO PORPHYRIN RING AND ITS EQUILIBRIUM WITH THE LOW SPIN SPECIES
Authors: Okuyama Kazuo , Nozawa Tsunenori , Murakami Tasuku , Hatano Masahiro
Published: July 2006

MCD and NMR studies revealed that deuterohemin is, in part, in a five-coordinated high spin form in solution where two imidazoles bound covalently. For the chemical equilibrium between the high spin and the main low spin six-coordinated species, standard enthalpy and entropy changes were −11×103Jmol−1 and −52 K−1mol−1, respectively.
INSERTION OF BENZOYLNITRENE TOWARD HYDROCARBON C–H BONDS
Authors: Inagaki Masao , Shingaki Tadao , Nagai Toshikazu
Published: July 2006

Benzoylnitrene, generated photochemically from benzoyl azide, was inserted stereospecifically into the tertiary C–H bonds of cis- and trans-1,4-dimethylcyclohexanes. The insertion regioselectivities toward the C–H bonds were determined by use of 2-methylbutane and 2,3-dimethylbutane. The insertion proceeds involving the singlet nitrene, but not the triplet, and the photo-Curtius rearrangement takes place independently of the nitrene reaction.
METAL ION DEPENDENT SELECTIVE P–O VS. S–O BOND FISSION IN THE REACTION OF PHENYL PHOSPHATOSULFATE
Authors: Eiki Toshio , Tagaki Waichiro
Published: July 2006

Metal ion promoted highly selective P–O or S–O bond fission has been found in the aminolysis and the methanolysis of phenyl phosphatosulfate, i.e. magnesium ion promoted the P–O bond fission, while ferric ion promoted the S–O bond fission. The selectivity was almost 100% in each case.
CONFORMATION OF CHITIN AND N-ACYL CHITOSANS IN SOLID STATE AS REVEALED BY 13C CROSS POLARIZATION/MAGIC ANGLE SPINNING (CP/MAS) NMR SPECTROSCOPY
Authors: Saitô Hazime , Tabeta Ryoko , Hirano Shigehiro
Published: July 2006

13C chemical shifts of solid chitin and N-acyl chitosans were measured by cross polarization/magic angle spinning (CP/MAS) NMR spectroscopy. It was found that a regenerated chitin, N-acetyl chitosan, adopts conformation almost identical to that of naturally occurring chitin in solid state. Conformation of N-decanoyl and N-stearoyl chitosans is also similar to that of chitin except for the moiety of amide groups.
RAMAN STUDIES ON DONOR-DOPED trans-POLYACETYLENES
Authors: Furukawa Yukio , Harada Issei , Tasumi Mitsuo , Shirakawa Hideki , Ikeda Sakuji
Published: July 2006

The Raman spectra of donor-doped trans-polyacetylenes have been studied. They are different from the Raman spectra of either intact or acceptor-doped trans-polyacetylene. A model structure of donor-doped trans-polyacetylene is proposed.
THE STEREOSELECTIVE SYNTHESIS OF d-RIBULOSE
Authors: Suzuki Keisuke , Yuki Yoichi , Mukaiyama Teruaki
Published: July 2006

In the presence of zinc halide, 2-furyllithium reacts with 2,3-O-isopropylidene-d-glyceraldehyde in a highly stereoselective manner to give the chiral and stereo-defined alcohol, 2,2-dimethyl-4-(2-furyl)hydroxymethyl-1,3-dioxolane, which is further elaborated to afford d-ribulose in three steps.
A NOVEL CARBOXYL PROTECTING GROUP —THE CARBOXAMIDE DERIVED FROM 5,6-DIHYDROPHENANTHRIDINE—
Authors: Uchimaru Tadafumi , Narasaka Koichi , Mukaiyama Teruaki
Published: July 2006

Carboxyl groups protected as the amides derived from 5,6-dihydrophenanthridine are stable under a wide range of conditions and can be selectively deprotected by oxidation on treatment with cerium(IV).
ELECTRO-HYDROGENATION OF THE C=N DOUBLE BOND OF THIAZOLINE–AZETIDINONES IN AN AQUEOUS PERCHLORIC ACID-DICHLOROMETHANE- (LEAD ELECTRODES)
Authors: Torii Sigeru , Tanaka Hideo , Satsuki Makoto , Siroi Takashi , Saitoh Norio , Sasaoka Michio , Nokami Junzo
Published: July 2006

Electro-hydrogenation of the C=N double bond of thiazoline–azetidinone derivatives derived from penicillins G and V in an aqueous HClO4–CH2Cl2–(Pb electrodes) system by changing the current direction every 30 s gave thiazolidine-azetidinones in 77-100% yields.
A NEW APPROACH TO REGIOCONTROLLED ENONE TRANSPOSITIONS BASED ON THE FACILE CONVERSION OF α,β-ENONE TOSYLHYDRAZONES TO THE TRANSPOSED ALLYLIC SULFIDES
Authors: Mimura Tetsuya , Nakai Takeshi
Published: July 2006

A new, facile method for the conversion of α,β-enone tosylhydrazones to the transposed allylic sulfides is described which combines sulfenylation of the hydrazone dianions with hydride reduction of the α′-sulfenylated hydrazones. This novel route to allylic sulfides can constitute the sequences for the two directionally different types of enone transposition with 1,2-carbonyl shift.
ELECTRON SPIN RESONANCE STUDY ON SULFENAMIDE AND DIAMINO SULFIDE RADICAL CATIONS
Authors: Izuoka Akira , Kobayashi Michio
Published: July 2006

Esr spectra of radical cations of sulfenamides and diamino sulfides were observed in nitroalkane containing aluminum chloride.

These radicals are stable at room temperature. Non-equivalence of two N-methylene groups indicates the restricted rotation around S–N bond in the radical cations.
HIGHLY STEREOSELECTIVE CONSTRUCTION OF CHIRAL QUATERNARY CARBON: ASYMMETRIC SYNTHESIS OF β,β-DISUBSTITUTED γ-BUTYROLACTONES
Authors: Tomioka Kiyoshi , Cho Youn-Sang , Sato Fuminori , Koga Kenji
Published: July 2006

Asymmetric synthesis of β, β-disubstituted γ-butyrolactones was carried out in highly stereoselective and predictable way, by means of sequential dialkylation of (S) -γ-trityloxymethyl-γ-butyrolactone followed by lactone carbonyl transposition. Application to the synthesis of spirocyclic compound was also described.
OXYGEN ATOM TRANSFER REACTION THE REACTION OF CARBONYL COMPOUNDS WITH DIOXYGEN COMPLEXES
Authors: Aida Shun’ichi , Ohta Hiroyuki , Kamiya Yoshio
Published: July 2006

The reaction of peroxobis(triphenylphosphine)platinum with benzil or benzoic anhydride gave benzoic anhydride or benzoyl peroxide respectively. The scope of the above reactions is described.
APPLICATION OF THE COMBINATION OF SODIUM BISULFITE AS A PROTECTIVE REAGENT AND SOLID SUPPORTS IN THE SELECTIVE REDUCTION OF 4-ACETYLBENZALDEHYDE WITH DIBORANE
Authors: Chihara Teiji , Wakabayashi Tamie , Taya Kazuo
Published: July 2006

4-Acetylbenzaldehyde (2) has been selectively reduced by using a combination of protective group and solid supports. The formyl group of 2 was protected by addition of sodium bisulfite. The adduct, supported on silica gel, was then selectively reduced to 4-(1-hydroxyethyl)benzaldehyde with diborane.
A NEW TYPE OF COPPER(II) COMPLEXES SHOWING CURIOUS CD BEHAVIOR; COPPER(II) COMPLEXES WITH QUADRIDENTATE LIGANDS CONTAINING TWO (S)-PYRROLIDINYL GROUPS AND TWO AMIDE GROUPS
Authors: Murakami Tasuku , Hatano Masahiro
Published: July 2006

The copper(II) complexes described in the title exhibited absorption spectra quite different from ordinary planar copper(II) complexes. Addition of base transformed the donor atom of the amide group and hence the absorption and CD spectra intensively changed. On the basis of these findings, the stereochemistry was discussed.
ASYMMETRIC INDUCTION UNDER HIGH-PRESSURE. MICHAEL ADDITION OF NITROMETHANE TO CHALCONE CATALYZED BY CHIRAL ALKALOIDS
Authors: Matsumoto Kiyoshi , Uchida Takane
Published: July 2006

The Michael addition of nitromethane to chalcone was performed at 10 kbar in the presence of a catalytic amount of chiral alkaloids such as quinine, cinchonidine, quinidine, chinchonine, brucine, and strychinine. The extent of asymmetric induction reached up to 50 % e.e. with quinidine in toluene.
ELECTROCHEMICAL CHLORINATION OF BUTADIENE
Authors: Takasu Yoshio , Matsuda Yoshiharu , Shimizu Akinori , Morita Masayuki , Saito Mitsutaka
Published: July 2006

An Electrochemical chlorination of butadiene was investigated at 25 °C by using an H-type cell with a CoCl2–MeCN anolyte and an NH4Cl–H2O catholyte separated by an anion-exchange membrane. The electrolysis gave 3,4-dichloro-1-butene and trans-1,4-dichloro-2-butene in high current efficiencies.
EMISSION MÖSSBAUER SPECTROSCOPY OF 57Co-LABELLED MERCURY(II), TETRAALKYLAMMONIUM AND COBALT(II) CRYPTATE SALTS OF TETRATHIOCYANATOCOBALTATE(II)
Authors: Wei Ho-Hsiang , Endo Kazutoyo , Sano Hirotoshi
Published: July 2006

Based on the comparison of emission Mössbauer spectra of tetraalkylammonium and cobalt (II) cryptate salts of tetrathiocyanatocobaltate(II) at 78 K, it has been concluded that the cryptate is stable against the local radiolysis initiated by EC-decay and that it accomodates the transient57Fe(III) species before the restoration of 57Fe(II) state.
ELECTROCHEMICAL OXIDATION OF AROMATIC OLEFINS. DEPENDENCE OF THE REACTION COURSE ON THE STRUCTURE OF THE OLEFINS AND ON THE NATURE OF THE ANODES
Authors: Kojima Masanobu , Sakuragi Hirochika , Tokumaru Katsumi
Published: July 2006

Anodic oxidation of a series of substituted styrenes was investigated in methanol with a platinum and a graphite electrode. Use of the platinum anode gave mainly dimethoxylated monomers accompanied with one or more of three types of dimethoxylated dimers (αα-, αβ-, and ββ-dimers) depending on the substituents. Use of the graphite anode, however, afforded the ββ-dimers as the main product together with dimethoxylated monomers.
AMINE-CATALYZED 1,2-HALOSELENENYLATION OF ALKYNES WITH PHENYL SELENOCYANATE IN THE PRESENCE OF CUPRIC HALIDE
Authors: Tomoda Shuji , Takeuchi Yoshito , Nomura Yujiro
Published: July 2006

The reaction of phenyl selenocyanate with six common alkynes in the presence of cupric halide(halogen=Cl or Br) and triethylamine provided halogen-substituted vinyl selenides, 1,2-haloselenenylation products, in 66–96% yields.
ATTEMPT FOR THE CONSTRUCTION OF PIGMENTED ELECTRODE
Authors: Iriyama Keiji
Published: July 2006

A flexible pigmented electrode has been developed by depositing a merocyanine film on a transparent electro-conducting film and its electrochemical behavior has been studied.
CONJUGATIVE FACTORS AFFECTING THE SYN–ANTI ISOMERIZATION RATE PROCESS OF 1,3,10,12-TETRATHIA[3.3](2,6)PYRIDINOPHANE
Authors: Bottino Francesco , Pappalardo Sebastiano
Published: July 2006

The synthesis and VT-NMR study of the title compound are described. A comparison of its conformational behaviour with that of related [3.3]metacyclophanes has led to the conclusion that, in addition to steric hindrance effects, conjugative factors may prove important in affecting the syn–anti isomerization of heteroheterophanes .
STUDIES ON NUCLEOSIDES AND NUCLEOTIDES. SYNTHESIS OF 1-[5-(E)-ENOFURANOSYL] URACIL DERIVATIVES VIA ACI-NITROESTERS
Authors: Kimura Junji , Shimizu Tatsuhiko , Mitsunobu Oyo
Published: July 2006

When the aci-nitroester obtained from N3-methyl- or O2-methyluridine was allowed to react with acetylmethylenetriphenylphosphorane, 1-[(E)-5,6,8-trideoxy-β-d-ribo-oct-5-eno-1,4-furanosid-7-ulosyl]-3-methyl- or O2-methyl-uracil (12 or 14) was selectively obtained.
81Br NQR STUDY ON THE MIXED-VALENCE COMPOUNDS (NH4)4SbIIISbVBr12 AND Rb4SbIIISbVBr12
Authors: Terao Hiromitsu , Okuda Tsutomu , Negita Hisao
Published: July 2006

81Br NQR spectra were observed on the mixed-valence compounds (NH4)4SbIIISbVBr12 and Rb4SbIIISbVBr12 between 77 K and room temperature. Their temperature dependences exhibit some interesting features. The SbIIIBr63− in the NH4 salt is slightly distorted to the D2d symmetry. The Townes–Dailey analysis reveals that the net charges on both SbIII and SbV are almost the same.
NMR STUDY OF HIGH PRESSURE EFFECTS ON MOLECULAR CONFORMATIONS OF 2,11-DITHIA[3.3.1]PARACYCLOPHANE AND 2,11-DITHIA[3.3.2]PARACYCLOPHANE
Authors: Imashiro Fumio , Saika A , Yamada Hiroaki , Sera Akira
Published: July 2006

A high-pressure high-resolution NMR study for 2,11-dithiaI3.3.n]paracyclophanes (n=1,2) revealed that the Hx protons of ring A shift notably to high field, whereas the Ha,b protons of ring B move to low field. Reduction of the partial volumes under high pressure, being effected by changes in the dihedral angles, is responsible for the chemical shift changes.
119Sn, 13C, AND 1H NMR STUDIES ON SIX-COORDINATE DIMETHYLTIN BIS(CHELATE) COMPOUNDS
Authors: Otera Junzo , Hinoishi Tomoya , Kawabe Yotaro , Okawara Rokuro
Published: July 2006

119Sn, 13C, and 1H NMR studies on dimethyltin bis(chelate) compounds disclosed that the nature of coordination about tin can be best clarified in terms of δ(119Sn), while 2J(H–119Sn) values are useful for an approximate estimation of configuration of these compounds.
A NEW METHOD FOR ENANTIOSELECTIVE SYNTHESIS OF β-HYDROXY-α-AMINO ACIDS
Authors: Nakatsuka Takashi , Miwa Tetsuo , Mukaiyama Teruaki
Published: July 2006

Highly optically active threo-β-hydroxy-α-amino acids were obtained by the successive treatment of the chiral hydroxy imine 1, prepared by the condensation of t-butyl glycinate with a chiral ketol 3, with methylmagnesium iodide, potassium diisopropylamide and aldehyde.
SELECTIVE FORMATION OF ETHYLENE AND PROPENE FROM METHANOL OVER PYRAZINIUM SALTS OF H3PW12O40
Authors: Kasai Atsushi , Okuhara Toshio , Misono Makoto , Yoneda Yukio
Published: July 2006

The catalytic conversion of methanol into hydrocarbons has been studied over a variety of metal and organic salts of H3PW12O40. Pyrazinium salts exhibited remarkably high selectivity to ethylene and propene.
SYNTHESIS AND CONFIGURATIONAL STABILITY OF 3,8-DIBENZYL-1-AZACYCLOOCTA-1,2-DIENE : THE FIRST EIGHT-MENBERED CYCLIC KETENIHINE
Authors: Firl Joachim , Schink Karl , Kosbahn Wolfgang
Published: July 2006

The preparation of the eight-membered cyclic ketenimine 4 is reported. 4 isa mixture of two diastereomers which interconvert through configuration inversion of the C=C=N-moiety with ΔG≠>19 kcal/mol. The fact that 4 shows a far higher barrier than structurally similar open chain derivatives or larger ring analogues of 4 proves that ketenimines stereoisomerize through nitrogen inversion.
STUDIES ON NOVEL HETEROCYCLIC SYSTEM: REACTION OF 2-CHLOROQUINOLINE WITH 2-MERCAPTOANILINE
Authors: Srikrishna Adusumilli , Reddy Rapolu Raji , Rao Somaraju Nagabhushan , Iyengar Deevi Sarangapani , Bhalerao Uday Triambakraj
Published: July 2006

Reaction of 2-chloroquinoline (I) with 2-mercaptoaniline (II) has been investigated. The product has been characterised as the yet unreported 12-thia-7,13-diazabenz[a]anthracene (V) system on the basis of spectral and analytical data. Probable mechanism for the formation of V has been discussed.
TETRAKIS[3,5-DI(F-METHYL)PHENYL]BORATE AS THE FIRST EFFICIENT NEGATIVELY CHARGED PHASE TRANSFER CATALYST. KINETIC EVIDENCES
Authors: Kobayashi Hiroshi , Sonoda Takaaki , Iwamoto Hidetoshi , Yoshimura Masaji
Published: July 2006

Remarkable accerelation was observed by use of sodium tetrakis[3,5-di(F-methyl)phenyl]borate as a negatively charged phase transfer catalyst for diazonium ion in the azo coupling reactions of aryldiazonium tetrafluoroborate with a range of diazophile components in liquid–liquid- and liquid–solid two-phase systems. Kinetics of the reactions was examined to confirm the phase transfer catalysis.
TOTAL SYNTHESIS OF ERGOT ALKALOID, (±)-6,7-SECOAGROCLAVINE
Authors: Somei Masanori , Yamada Fumio , Karasawa Yoshio , Kaneko Chikara
Published: July 2006

Ergot alkaloid, (±)-6,7-secoagroclavine was synthesized from 2-methyl-5-nitroisoquinolinium iodide by three routes. In the course of the study, a novel intra-molecular γ-alkylation of allyl alcohol was found. Reaction of Grignard reagents with nitroalkanes to afford N-alkyl hydroxylamines was effectively used in the present synthesis.
13C-NMR CHEMICAL SHIFTS OF DIFLUOROMETHYLENE GROUPS
Authors: Noshiro Makoto , Akatsuka Yonezoh , Jitsugiri Yukio , Yonemori Shigeaki
Published: July 2006

The carbon-13 chemical shifts are reported for difluoromethylene groups. These carbons resonate in a small range between 109–117 ppm. Triple resonance technique, 13C–{1H}{19F} was used in the case of compounds including hydrogen and fluorine.
SELECTIVE α-OXIDATION OF CYCLIC β-KETOESTERS WITH POTASSIUM FLUORIDE AND OXYGEN IN DIMETHYL SULFOXIDE: A SYNTHESIS OF KJELLMANIANONE
Authors: Irie Hiroshi , Katakawa Jun’ichi , Tomita Masako , Mizuno Yukio
Published: July 2006

Selective oxidation of cyclic β-ketoester groups with potassium fluoride-oxygen in dimethyl sulfoxide provided α-hydroxy-β-ketoesters in fair yields. Application of the oxidation to 5-methoxycarbonyl-3-methoxy-cyclopent-2-enone furnished (±)-kjellmanianone.
NOVEL SYNTHESIS OF ENOL ESTERS THROUGH SILVER-CATALYZED REACTION OF ACETYLENIC COMPOUNDS WITH CARBOXYLIC ACIDS
Authors: Ishino Yoshio , Nishiguchi Ikuzo , Nakao Satoshi , Hirashima Tsuneaki
Published: July 2006

It was found that the reactions of l,4-diacetoxy-2-butyne and related acetylenic compounds with carboxylic acids are efficiently catalyzed by silver salts to give the corresponding enol acetates in good yield.
SOLVENT EFFECTS ON FLUORESCENCE OF INTRAMOLECULAR HETEROEXCIMER SYSTEM AND ITS USE FOR INVESTIGATING POLARITY OF MICROSCOPIC ENVIRONMENT
Authors: Kano Koji , Goto Hideyuki , Ogawa Teiichiro
Published: July 2006

Intramolecular heteroexcimer emission from pyrene-(CH2)3-N,N-dimethylaniline was very sensitive toward solvent polarity and was used for estimating the microscopic polarity of micelles, liposomes, and microemulsions. Liposomes show polarity change as the phase transitions.
SYNTHESIS OF THE TWO ISOMERS OF THE POTENTIAL SEX PHEROMONE OF THAUMETOPOEA PTTVOCMPA (LEPIDOPTERA, NOTODONTIDAE) AND RELATED MODEL COMPOUNDS
Authors: Camps Francisco , Coll José , Canela Ramón , Guerrero Angel , Riba Magf
Published: July 2006

The synthesis of the major component of the sex pheromone secretion of the processionary moth, Tkawnztopoeja pltyocampa (Denis and Schiff.) (Lepidoptera, Notodontidae), (Z)-13-hexadecen-ll-ynyl acetate (1), the corresponding (E)-isomer (2) and the four structurally related model compounds (Z⁄E,Z,Z)-5,9,13-hexadecatrienyl acetate (3), (Z⁄E,Z,Z)-3,7,ll-hexadecatrienyl acetate (4), (Z⁄E,E,Z)-7,9,13-hexadecatrienyl acetate (5) and (Z)-7-hexadecen-5-ynyl acetate (6) is described.
PHOTOINDUCED OXIDATIVE CLEAVAGE OF ARYLCYCLOPROPANES IN THE PRESENCE OF ORGANIC ELECTRON-ACCEPTOR
Authors: Mizuno Kazuhiko , Ogawa Jun , Otsuji Yoshio
Published: July 2006

The cyclopropane ring of arylcyclopropanes is oxidatively cleaved by irradiation in polar solvents containing nucleophiles such as alcohols, water, and sodium cyanide in the presence of electron-acceptor such as 1,4-dicyanobenzene and 1-cyanonaphthalene, giving nucleophile-incorporated products. This photoreaction proceeds via an electron-transfer from the cyclopropanes to the excited electron-acceptors, and the cation radicals of arylcyclopropanes are involved as key intermediates.
A FACILE PREPARATION OF DIALKYL CARBONATES FROM POTASSIUM CARBONATE AND ALKYL BROMIDES BY USING ORGANOSTANNYL COMPOUND AS A CATALYST
Authors: Fujinami Tatsuo , Sato Shinichi , Sakai Shizuyoshi
Published: July 2006

Dialkyl carbonates were easily prepared by the heterogeneous reaction of solid potassium carbonate with alkyl bromides in dimethylformamide or dimethylsulfoxide in the presence of organostannyl compound such as hexabutyldistannoxane or chlorotributylstannane. Mixed catalytic system consisting of a tributylstannyl compound and 18-Crown-6 was much effective even in less polar solvents.
EXCISANIN A AND B, NEW DITERPENOIDS FROM RABDOSIA EXCISA
Authors: Han-dong Sun , Xi-chang Sun , Zhon-wen Lin , Yan-long Xu , Minami Yoshinori , Marunaka Teruyoshi , Fujita Tetsuro
Published: July 2006

Chemical investigation of the bitter principles from Rabdosia Excisa has led to the isolation and characterization of two new diterpenoids having an ent-kaurene skeleton, excisanin A and B, and their structures were established by spectroscopic and chemical data.
STEREOSELECTIVE DEACYLATION OF LONG-CHAIN p-NITROPHENYL N-ACYLPHENYLALANATES BY PALMITOYL-l-HISTIDINE IN A BILAYER SYSTEM
Authors: Ueoka Ryuichi , Matsumoto Yoko , Ninomiya Yashushi , Nakagawa Yoshiharu , Inoue Kazuhiro , Ohkubo Katsutoshi
Published: July 2006

In the stereoselective deacylation of H–[CH2]n-1–CONHCH(CH2Ph)CO2–C6H4NO2-p (n=10 and 16), the bilayer catalytic systems of palmitoyl-l-histidine and double-chain surfactants ([CmH2m+1]2N[CH3]2Br; m=12 and 14) offered the relatively higher enantiomer rate ratios (kcatL⁄kcatD=3.7–5.6) as compared with those (kcatL⁄kcatD=3.5–3.6) obtanined with the comicellar system of palmitoyl-l-histidine and octadecyltrimethylammonium chloride.
ESR STUDIES OF THE Cu(II) COMPLEXES OF N,N′-BIS(PICOLINOYL)-1,3-PROPANEDIAMINE, A PYRIDINE CONTAINING POLYPEPTIDE MODEL LIGAND
Authors: Kajikawa Yuji , Mukai Kazuo , Ishizu Kazuhiko , Ojima Heijiro
Published: July 2006

A triplet ESR spectrum (S = 1) was observed for the dimerous N,N′-bis-(picolinoyl)-1,3-prcpanediaminato Cu(II) complex formed in acidic aqueous solution (pH = 3.8). Based on the simple dipole model, internuclear copper–copper atomic distance in the stacked dimerous copper chromophore was estimated to be about 4 Å.
A NOVEL PHOTO-INDUCED CHARGE SEPARATION BY THE USE OF ELECTRON MIGRATION ON THE MAN-MADE MOLECULAR ASSEMBLIES
Authors: Takuma Keisuke , Sakamoto Tetsuo , Matsuo Taku
Published: July 2006

Electron exchanges between amphipathic viologens lead to electron migration along the surface of a molecular bilayer system, which affords efficient means for photo-induced charge separation (PICS) as sensitized by an amphipathic derivative of tris(2,2′-bipyridine)ruthenium (II) complex.
CHROMATOGRAPHIC RESOLUTION OF ENANTIOMERS HAVING AROMATIC GROUP BY OPTICALLY ACTIVE POLY(TRIPHENYLMETHYL METHACRYLATE)
Authors: Okamoto Yoshio , Okamoto Ichiro , Yuki Heimei
Published: July 2006

Various racemic compounds containing aromatic groups were completely resolved by high-performance liquid chromatography on optically active (+)-poly(triphenylmethyl methacrylate) using methanol as eluent.
INTERVENTION OF SULFINYL SULFONE IN THE OXIDATION PATHWAY OF THIOSULFONIC S-ESTER TO α-DISULFONE
Authors: Oae Shigeru , Takata Toshikazu
Published: July 2006

Sulfinyl sulfone was confirmed as a stable intermediate in direct NMR study on the oxidation of thiosulfonic S-ester with MCPBA in CDCL3, by comparing the chemical shifts with those of the authentic sample prepared by condensation method.
PHOSPHORYLATION OF INOSINE WITH CYCLO-TRIPHOSPHATE
Authors: Tsuhako Mitsutomo , Fujimoto Mayumi , Ohashi Shigeru
Published: July 2006

Phosphorylation of inosine with cyclo-triphosphate(P3m) in aqueous solution was studied by means of anion-exchange chromatography and high performance liquid chromatography. P3m reacted with inosine at 70°C and room temperature and at pH 12 to form inosine 2′- and 3′-monophosphates. The yields of 2′- and 3′-monophosphates were about 33 and 26%, respectively.
ACCORDION-TYPE AGGREGATE OF WATER-SOLUBLE MESO-TETRAPHENYLPORPHYRIN DERIVATIVES
Authors: Shimidzu Takeo , Iyoda Tomokazu
Published: July 2006

An anionic water-soluble meso-tetraphenylporphyrin derivatives and cationic one form an accordion-type aggregate, i.e., the face-to-face type multi-structure, even in relatively low concentration.
A SYNTHETIC METHOD FOR NOVEL 1,2,3-TRISUBSTITUTED CYCLOPENTANE DERIVATIVES, 1-HYDROXYMETHYL-3-METHOXY-2-OXABICYCLO[2.2.1]HEPTANE-7-CARBOXYLIC LACTONES
Authors: Imagawa Takeshi , Nakagawa Tsunefumi , Matsuura Kazuyuki , Akiyama Tetsuo , Kawanisi Mituyosi
Published: July 2006

The reaction of furfuryl alcohols with maleic anhydride leads to tricyclic lactone-carboxylic acids through the sequence of esterification and intramolecular Diels–Alder reaction. Anodic oxidative decarboxylation of the hydrogenated products in MeOH affords 1,2,3-trisubstituted cyclopentane derivatives, viz. 1-hydroxymethyl-3-methoxy-2-oxabicyclo[2.2.1]heptane-7-syn-carboxylic lactones, potential intermediates for synthesis of iridoids.
INTRAMOLECULAR DIELS–ALDER REACTIONS OF VINYLFURAN DERIVATIVES A NOVEL APPROACH TO BENZOFURANS
Authors: Kotsuki Hiyoshizo , Kawamura Ayumi , Ochi Masamitsu , Tokoroyama Takashi
Published: July 2006

A successful intramolecular Diels–Alder reaction of vinylfuran derivatives was reported. The adducts were proved to be a useful precursor of substituted benzofurans.
SYNTHESIS OF SOME RACEMIC ISOMERS OF VALIDOXYLAMINE A
Authors: Ogawa Seiichiro , Toyokuni Tatsushi , Suami Tetsuo
Published: July 2006

Two racemic isomers of validoxylamine A were synthesized by the condensation reaction of the blocked Dl-validamine and the allyl bromide, the precursor of the unsaturated branched-chain cyclitol moiety.
CHEMILUMINESCENT REACTIONS OF C2+ IONS WITH H2 MOLECULES
Authors: Ishikawa Toshiaki , Sasaki Hiromi , Inouye Hokotomo
Published: July 2006

Chemiluminescence spectra produced by reactions of C2+ ions with H2 molecules were observed with a spectral resolution of 20 Å at collision energies between 5.4 and 22 eV in the center-of-mass system. Emission from the singlet system CH+(B 1Δ) was observed as well as the bands due to the triplet system CH+(b 3Σ−).
RHODIUM CARBONYL-CATALYZED CARBONYLATION OF ACETYLENES IN THE PRESENCE OF OLEFINS AND PROTON DONORS. SYNTHESIS OF 5-ALKYL-2(5H)-FURANONES
Authors: Hong Pangbu , Mise Takaya , Yamazaki Hiroshi
Published: July 2006

Rhodium carbonyl-catalyzed reactions of internal acetylenes with ethylene and CO in protic solvents, e.g., ethanol, gave 3,4-disubstituted-5-ethyl-2(5H)-furanones in good yields. By using propylene or methyl acrylate instead of ethylene, small amounts of 5-n-/iso-propyl-2(5H)-furanones or 5-[2-(methoxycarbonyl)ethyl]-2(5H)-furanone were obtained.
NEW SYNTHETIC METHOD OF THIOALDEHYDES FROM β-IMINO-NITRILES AND DITHIOFORMATE
Authors: Muraoka Motomu , Yamamoto Tatsuo , Takeshima Tatsuo
Published: July 2006

A series of stable monomeric α-cyano-β-imino-thioaldehydes were synthesized from β-imino-nitriles and potassium dithioformate.
PREPARATION OF NEW HYDROPEROXO COMPLEX OF RHODIUM
Authors: Suzuki Hiroharu , Matsuura Shinji , Moro-oka Yoshihiko , Ikawa Tsuneo
Published: July 2006

Novel hydroperoxo complex of rhodium, (Ph3P)2(acac)ClRhOOH is prepared by the reaction of rhodium peroxo complex, (Ph3P)3 ClRhO2, with acetylacetone. This new complex is characterized by means of IR, NMR, elemental analysis, and 18O2 labeling experiment. (Ph3P)2(acac)ClRhOOH decomposes in chloroform solution to (Ph3P)2(acac)RhCl2 by way of the corresponding hydroxo complex.
INCLUSION OF AROMATIC GUEST MOLECULES WITH BULKY SUBSTITUENTS IN LAYERED METAL COMPLEX HOST trans-BIS(DIMETHYLAMINE)CADMIUM(II) TETRA-catena-μ-CYANONICKELATE(II)
Authors: Nishikiori Shin-ichi , Iwamoto Toschitake
Published: July 2006

A novel type of the metal complex host Cd(NH(CH3)2)2Ni(CN)4 derived by replacing the NH3 in Hofmann-type host Cd(NH3)2Ni(CN)4 by NH(CH3)2includes the benzene derivatives with several bulky substituents between the layered structure, the guest molecules which have never been enclathrated into Hofmann-type and the analogous hosts.
DIRECT PHOTOLYSIS AT 185 NM OF CYCLOPENTENE AND 2-NORBORNENE. A NOVEL REACTION CHANNEL FOR π,π* EXCITED SINGLET ALKENE
Authors: Inoue Yoshihisa , Mukai Toshio , Hakushi Tadao
Published: July 2006

Upon direct irradiation at 185 nm, the title compounds undergo hydrogen abstraction from the solvent via a π,π* excited singlet state as well as skeletal rearrangement via a π,R(3s) Rydberg excited state.
ANTHRACYCLINES. CYCLOADDITIONS OF 9-CHLORO-10-HYDROXY-1,4-ANTHRAQUINONE WITH VARIOUS BUTA-1,3-DIENES
Authors: Agarwal Nand L , Scheeren Hans W
Published: July 2006

The Diels–Alder type cycloaddition of several substituted buta-1,3-dienes with 9-chloro-10-hydroxy-1,4-anthraquinone (10) affords an efficient, regiospecific access in two steps to tetracyclic ketones (12–14) which have been investigated as intermediates for the synthesis of anthracycline derivatives. Butadienes with a less asymmetric II-electron distribution than 9 give lower regiospecificity in cycloadditions with 10. Depending on the substituents in the used butadiene, the obtained cycloadducts are transformed under the reaction circumstances into the aromatized products (15–20).
A NEW METHOD FOR REGIOSELECTIVE α-MONO- OR α,α-DI-DEUTERATION OF CARBONYL COMPOUNDS
Authors: Ono Noboru , Hamamoto Isami , Miyake Hideyoshi , Kaji Aritsune
Published: July 2006

Mono- or di-deuterated carbonyl compounds are prepared regioselectively by the base-catalyzed H–D exchange of α-hydrogen of aliphatic nitro compounds and the subsequent replacement of the nitro group by H or D with Bu3SnX (X = H, D).