bluuebunny/crossref_metadata_2025_split huggingface dataset:
FREE RADICAL ADDITION OF 3-CHLORO-4,4-DIMETHYL-2-OXAZOLIDINONE TO ALLYLSTANNANE AND ALLYLSILANE
Authors: Kosugi Masanori , Yano Kazuyoshi , Chiba Mitsuo , Migita Toshihiko 
Published: July 2006

Abstract
Free radical reaction of 3-chloro-4,4-dimethyl-2-oxazolidinone (NCDMO) to allylstannane and allylsilane were found to give 3-allyl-4,4-dimethyl-2-oxazolidinone. The formation of the product was interpreted in terms of addition of the acylamino radical. NCDMO does not react with ordinary olefin, perhaps owing to inhibiting behavior of enamine which may be derived from the adduct of NCDMO to olefin.
STABLE CYCLOPENTADIENONE DERIVATIVES. PERCHLORO-2H,5H-CYCLOPENTA[b]PYRAN-5-ONE AND -2,5-DIONE
Authors: Kusuda Kousuke , Roedig Alfred , Bonse Gerhard 
Published: July 2006

Abstract
Perchloro-2H,5H-cyclopenta[b]pyran-5-one (12a) was obtained by thermal electrocyclic ring closure of diketone (11). Compound 12a was hydrolized to another stable cyclopentadienone derivative, perchloro-2H,5H-cyclopenta[b]pyrane-2,5-dione (8), which was prepared directly from (4) by treatment with sulfuric acid.
INCORPORATION OF CARBON DIOXIDE IN ALKYNE OLIGOMERIZATION CATALYZED BY NICKEL(0) COMPLEXES. FORMATION OF SUBSTITUTED 2-PYRONES
Authors: Inoue Yoshio , Itoh Yoshio , Hashimoto Harukichi 
Published: July 2006

Abstract
1-Hexyne and carbon dioxide were allowed to react with the catalyst system, Ni(COD)2[COD=1,5-cyclooctadiene]-Ph2P(CH2)nPPh2 (n=1,2,3,4), to give 4,6-dibutyl-2-pyrone together with 1-hexyne oligomers.
CMR CHEMICAL SHIFTS AND TOTAL CHARGE DENSITIES OF [2.2]CYCLOPHANES. THE EFFECT OF TRANSANNULAR Π- Π INTERACTION
Authors: Takemura Tetsuo , Tokita Kazushi , Kondo Shoichi , Mori Nobuo 
Published: July 2006

Abstract
The chemical shifts for the transannularly π-π interacted and the non-interacted aryl carbons in three [2.2]cyclophanes bear linear relationships to the total charge densities. The interacted carbons are shifted downfield by ca. 7 ppm compared with the noninteracted ones, when the total charge densities are the same.
SYNTHESIS OF ISO-π-ELECTRONIC HETEROANALOGUES OF HEPTAFULVALENE
Authors: Kato Kazuo , Kitahara Yoshio , Morita Noboru , Asao Toyonobu 
Published: July 2006

Abstract
Several iso-π-electronic oxa- and thia-heteroanalogues of heptafulvalene were synthesized by the reaction of the corresponding heterocyclic ketones with 8-oxoheptafulvene. These fulvalenes were found to be polyolefinic by comparison of their physical and chemical properties with those of heptafulvalene.
THE [1,2] VS. [2,3] SIGMATROPIC REARRANGEMENTS IN α-ALLYLOXYCARBENE
Authors: Iwamura Hiizu , Iwai Masahiro , Kihara Hiroshi 
Published: July 2006

Abstract
The [2,3] sigmatropic rearrangement has been predicted by MO theoretical calculations (MINDO/3) to be preferred to the [1,2] shift in α-allyloxycarbene giving 3-buten-1-al. The activation energy for the former process is governed by the non-neighboring two center terms, indicating that the reaction can be replaced by the [1,2] shift under increased steric demand as observed in an γ,γ-dimethylallyloxycarbene.
DIRECT SYNTHESIS OF VITAMIN K1 AND K2
Authors: Tachibana Yoji 
Published: July 2006

Abstract
Vitamin K1(20) and K2(10) were obtained in good yields by the reactions of 2-methyl-1,4-naphthocuinone with phytyl and geranyl halide in the presence of metal dust. In this method, no reduction oxidation process is involved and the substitution at position 2 to form the isomeric by-product can be blocked effectively.
THE CRYSTAL STRUCTURE OF 2:1 TETRAPROPYLAMMONIUM GUANIDINIUM BROMIDE COMPLEX, [N (C3H7)4]+2[C (NH2)3]+Br− 3
Authors: Taga Tooru , Ohashi Makoto , Miyajima Koichiro , Yoshida Hiromitsu , Osaki Kenji 
Published: July 2006

Abstract
The crystal structure of the title compound is a distorted CaF2 type of ionic crystal. The guanidinium ion is bound to the three bromide ions by the NH···Br hydrogen bonds and forms a rigid divalent anionic group. The two tetrapropylammonium groups have the different conformations represented by the symmetry, \bar42m and \bar4.
SELECTIVITY IN THE PRODUCT-DISTRIBUTION UPON THE ADDITION OF DICHLOROCARBENE TO OLEFINS BY USE OF TERTIARY AMINES AS CATALYSTS
Authors: Kimura Yoshikazu , Isagawa Kakuzo , Otsuji Yoshio 
Published: July 2006

Abstract
The dichlorocarbene species generated from chloroform and aqueous sodium hydroxide in the presence of tertiary amines exhibits a high selectivity in the product-distribution upon its addition to olefins containing multiple double bonds; the monoadducts was produced in preference to the bisadducts. The selectivity increases with decrease in the reactivity of the dichlorocarbene species.
RING CLEAVAGE OF EPOXIDES WITH THIOANISOLE–CHLORINE COMPLEX: A SIMPLE SYNTHESIS OF α-CHLOROCARBONYL COMPOUNDS
Authors: Nakai Hisao , Kurono Masayasu 
Published: July 2006

Abstract
The reaction of epoxides (1) with thioanisole-chlorine complex (2) produced α-chlorosulfoxonium intermediates (3a and/or 3b), which were quenched with aqNaHCO3 to afford α-chloroalcohols (4a and/or 4b). The intermediate (3a and/or 3b) gave α-chlorocarbonyl compounds (5a and/or 5b) by treatment with triethylamine.
PHOTOCHEMICAL REACTION OF 2-ACETYL-1,4-BENZOQUINONE IN THE PRESENCE OF ROSE BENGAL
Authors: Maruyama Kazuhiro , Narita Noritsugu , Miyagi Yo 
Published: July 2006

Abstract
Irradiation of 2-acetyl-1,4-benzoquinone 1 in acetonitrile in the presence of rose bengal afforded the dimer, 2-acetyl-3-phenoxy-1,4-benzoquinone derivative 3. This is quite different from another dimer 2, which is obtained in the photochemical reaction of 1 in the absence of rose bengal.
ONE-STEP FORMATION OF [9]PARACYCLOPHA-3,5-DIENES BY A CYCLOADDITION REACTION
Authors: Kataoka Fumio , Nishida Shinya 
Published: July 2006

Abstract
The reaction of certain 1-substituted 1-cyclopropyl-1,3-butadiene (1: (Remark: Graphics omitted.)-CR=CHCH=CH2, a: R=(CH3)3C–, b: R=(CH3)2CH-, c: R = cyclo-C3H5–, d: R=C6H5) with TCNQ yielded a [9]paracyclopha-3,5-diene (2). Formation of the same adduct 2d from both E-1d and Z-1d suggests a stepwise mechanism probably involving a dipolar intermediate.
A NOVEL METHOD FOR THE PREPARATION OF PRIMARY AMINES BY THE USE OF N-BENZYLHYDROXYLAMINE AND 2-FLUOROPYRIDINIUM SALT
Authors: Mukaiyama Teruaki , Tsuji Takashi , Watanabe Yutaka 
Published: July 2006

Abstract
Primary amines were prepared from alkyl halides or olefinic compounds by the use of N-benzylhydroxylamine and 2-fluoro-1-methylpyridinium p-toluenesulfonate.
ELECTRON SPIN RESONANCE SPECTRA OF N-ALKYL-N-(ALKYLTHIO)AMINYLS
Authors: Miura Yozo , Asada Hidetsugu , Kinoshita Masayoshi 
Published: July 2006

Abstract
A variety of N-alkyl-N-(alkylthio)aminyls are generated from the appropriate N-alkylalkanesulfenamides by hydrogen-abstraction with t-butoxyl and are investigated by ESR spectroscopy.
SYNTHESES AND PROPERTIES OF TRIMETHYLBISDEHYDRO[17]ANNULENONE AND ITS BENZANNELATED DERIVATIVES
Authors: Qjima Juro , Kanazawa Keiko , Kusaki Kiyomi , Wada Kazuyo 
Published: July 2006

Abstract
Syntheses of 2,7,12-trimethyl- 5, 12,17-dimethylbenzo[f]-6, 2,12-dimethylbenzo[f]- 7, and 2-methyldibenzo[f,1]-8,10-bisdehydro[17]annulenone 8 are described. The 1H-NMR spectra of these annulenones suggest that the skeleton of the bisdehydro[17]annulenone of this type is more planar and less strained than that of the corresponding [13]annulenone.
PARTICIPATION OF CYCLODEXTRIN INCLUSION CATALYSIS IN PHOTOLYSIS OF CHLORPROMAZINE TO GIVE PROMAZINE IN AQUEOUS SOLUTION
Authors: Uekama Kaneto , Irie Tetsumi , Hirayama Fumitoshi 
Published: July 2006

Abstract
Photo-irradiation of chlorpromazine in the presence of cyclodextrins (CyDs) gave promazine in high yield in an aqueous solution. This dechlorination reaction and the proceeding photooxidation to give promazine sulfoxide were found to be largely dependent upon the cavity size of CyDs (β-CyD &gt; γ-CyD &gt; α-CyD), indicating a selective catalysis through formation of an inclusion complex.
FORMATION OF THE STABLE INTERMEDIATE COMPLEXES IN THE HALOGENATION OF POLYACETYLENE
Authors: Shirakawa Hideki , Sasaki Toshimasa , Ikeda Sakuji 
Published: July 2006

Abstract
Stable charge–transfer π complexes [–(CH=CH)n– (CH=CH– … X+)X3−–]m X = Cl, Br, and I, are formed between both trans- and cis-polyacetylene [–(CH=CH)n–] with chlorine, bromine, and iodine, which have strong absorptions in near i.r. to i.r. region, and show a large increase in electrical conductivity.
SYNTHETIC STUDIES ON DERIVATIVE OF 6-epi-PURPUROSAMINE B, A COMPONENT OF FORTIMICINS
Authors: Suami Tetsuo , Honda Yutaka , Kato Tsuguhiro 
Published: July 2006

Abstract
6-epi-Purpurosamine B is a component of pseudo-disaccharide antibiotic fortimicins. The derivative: methyl 2,6-di-N-acetyl-6-epi-α-purpurosaminide B was synthesized from methyl 2-acetamido-2-deoxy-6-O-trityl-α-d-glucopyranoside.
THE BF3 CATALYZED DECOMPOSITION OF DIAZOCARBONYL COMPOUNDS IN NITRILES: SYNTHESIS OF OXAZOLES
Authors: Ibata Toshikazu , Sato Ryohei 
Published: July 2006

Abstract
The BF3 catalyzed decomposition of diazocarbonyl compounds in nitriles afforded the corresponding oxazoles in high yield. This method is applicable to diazocarbonyl compounds such as m- and p-substituted diazoacetophenones, ethyl diazoacetate, azibenzil, dibenzoyldiazomethane, dimethyl diazomalonate, and 7-diazo-8-acenaphthenone.
ADDITION OF CARBON TETRACHLORIDE TO CONJUGATED 1,3-DIENES CATALYZED BY DICHLOROTRIS(TRIPHENYLPHOSPHINE)RUTHENIUM(II)
Authors: Matsumoto Hideyuki , Nakano Taichi , Nikaido Toshimi , Nagai Yoichiro 
Published: July 2006

Abstract
Addition of carbon tetrachloride to conjugated 1,3-dienes such as 1,3-butadiene, 1,3-pentadiene, isoprene, 1,3-cyclohexadiene and 1,3-cyclooctadiene proceeded smoothly under mild conditions in the presence of dichlorotris(triphenylphosphine)ruthenium(II) to give the corresponding 1,4-addition products as 1:1 adducts in excellent yields.
CROWN COMPLEXANE. 1,10-DIAZA-4,7,13,16-TETRAOXACYCLOOCTADECANE-N,N′-DIPROPIONIC ACID
Authors: Takagi Makoto , Tazaki Masato , Ueno Keihei 
Published: July 2006

Abstract
The title compound (1, H2L), a new type of complexane chelating agent, was synthesized and the complexation properties were examined by potentiometric method. The successive acid dissociation constants (in pKa unit) were 2.61 (H4L2+), 3.63 (H3L+), 8.20 (H2L) and 8.92 (HL−) at 25.0 °C and μ = 0.10M (KNO3). The conditional stability constants (in log KML unit) for MIIL were &lt;2 (Mg2+), 4.0 (Ca2+), 4.4 (Sr2+) and 3.8 (Ba2+). Interaction with Co2+, Ni2+ and Zn2+ was comparable to the alkaline earth metals. Cu 2+ interacted strongly but in a complicated manner.
BEHAVIORS OF LATTICE OXYGEN OF TRISILVER DODECAMOLYBDOPHOSPHATE CATALYST IN THE REACTION OF H2 + 18O2
Authors: Tsuneki Hideaki , Niiyama Hiroo , Echigoya Etsuro 
Published: July 2006

Abstract
Behaviors of lattice oxygen of Ag3PMo12O40 in catalytic reaction of H2 + 18O2 were studied. 18O was predominantly introduced in place of bridge-bonded oxygen of polyanion, (PMo12O403−). Presumably, the reaction proceeds through redox cycles of bridge-bonded oxygen.
NOVEL REARRANGEMENT OF DIHYDROMAYURONE WITH BORON TRIFLUORIDE IN ACETIC ACID-ACETIC ANHYDRIDE
Authors: Sekizaki Haruo , Ito Masaaki , Inoue Shoji 
Published: July 2006

Abstract
Acid-catalyzed isomerization of dihydromayurone (4) with boron trifluoride etherate in acetic acid-acetic anhydride afforded 4-acetoxy-1β,11,11-trimethylbicyclo[5.4.0]undeca-3,7-diene (5), 4-acetoxy-1β,7β,11-trimethylbicyclo[5.4.0]undeca-3,10-diene (6), 7-acetoxy-2,2,3-trimethyltricyclo[5.2.2.01,6]undec-3-ene (16), and 4-acetyl-7-acetoxy-2,2,3-trimethyltricyclo[5.2.2.01,6]undec-3-ene (17) as the case may be, according to reaction temperature.
PHOTOCYCLOADDITION OF 5,7-DIMETHOXYCOUMARIN TO TETRAMETHYLETHYLENE
Authors: Shim Sang Chul , Chi Dae Yoon 
Published: July 2006

Abstract
The photocycloaddition reaction of DMC to TME is studied as a model for skin-sensitizing DMC-thymine C4-cycloaddition reaction. The DMC-TME 1:1 C4-cycloadduct is obtained with a quantum yield of 0.16. The fluorescence of DMC is quenched by TME giving a linear Stern–Volmer plot and kq of 4 × 109 l mole−1 sec−1 and singlet exciplex formation mechanism is proposed for the cycloaddition of DMC to TME.
THE CHARACTERIZATION OF A PLATINUM-TIN OXIDE CATALYST BY X-RAY PHOTOELECTRON SPECTROSCOPY
Authors: Katayama Akiko 
Published: July 2006

Abstract
A Pt–SnO2 catalyst in various compositions of Pt and SnO2 was prepared and its properties were studied by XPS. Some of platinum of Pt–SnO2 were observed to be stabilized by SnO2 in Pt+2 and Pt+4 forms, and Pt0 form still remained in Pt–SnO2. However, platinum, prepared in the same manner with the method of preparation of Pt–SnO2, stayed at the state identical to platinum metal. Tin existed in an SnO2 form, indifferent to the presence of platinum.
PREPARATION AND THERMAL DECOMPOSITION OF UNSYMMETRICAL DIALKYL PLATINUM(II) COMPLEXES. ELUCIDATION OF A FACTOR CONTROLLING THE EASE OF β-ELIMINATION
Authors: Komiya Sanshiro , Yamamoto Akio , Yamamoto Takakazu 
Published: July 2006

Abstract
Unsymmetrical dialkylbis(triphenylphosphine)platinum(II), Pt(Ra)(Rb)(PPh3)2, has been prepared by the reaction of Pt(Ra)X(PPh3)2with alkylating reagents such as (Rb)MgX and (Rb)Li. The distribution of the gaseous products on thermolysis of these compounds reveals that the relative ease of β-eliminaiton concerning Ra and Rb is controlled by the numbers of β-hydrogens in these alkyl groups.
A CONFORMATIONAL STUDY OF THREE ISOMERIC [3.3]CYCLOPHANEQUINONES
Authors: Shinmyozu Teruo , Inazu Takahiko , Yoshino Tamotsu 
Published: July 2006

Abstract
Three isomeric [3.3]cyclophanequinones 2-4 were synthesized. The conformations of these compounds were discussed on the basis of the NMR spectra. The electronic spectra suggested that the paracyclophane system adopted the most suitable conformation for charge transfer interaction.
SYNTHESIS OF AMINO DERIVATIVES OF CYCLOHEPTAAMYLOSE HAVING STRONG ANTIMICROBIAL ACTIVITIES
Authors: Tsujihara Kenji , Kurita Hironori 
Published: July 2006

Abstract
In a study of the relationship between a number of amino groups in cycloheptaamylose and their antimicrobial activity, the polyamino derivatives of cycloheptaamylose, VIa and VIb possessing ten and eleven amino groups respectively were synthesized. VIa and VIb showed strong antimicrobial activities against such gram negative bacteria as Escherichia, Shigella and Pseudomonas species.
POSSIBLE IMPORTANCE OF AN ABNORMAL ORBITAL INTERACTION IN EXCITED-STATE REACTIONS BETWEEN ELECTRON DONORS AND ACCEPTORS
Authors: Inagaki Satoshi , Hirabayashi Yoshio 
Published: July 2006

Abstract
Photochemical reactions between powerful electron donors and acceptors are likely controlled by the (HOMO)D–(LUMO)A interaction involved in the D*A–D+*A− or DA*–D+A−* interaction, the frontier orbital interaction being the same as one in usual thermal reactions.
CARBOXYLATION OF ACTIVE METHYLENE COMPOUNDS USING 1,3-DIPHENYLUREA, POTASSIUM CARBONATE AND CARBON DIOXIDE
Authors: Chiba Koji , Akama Toshio , Sakakibara Kiyoo , Horie Kiyoshi 
Published: July 2006

Abstract
Indene, and fluorene were effectively carboxylated by employing the reagent system, 1,3-diphenylurea, potassium carbonate and carbon dioxide, in organic solvent at room temperature and atmospheric pressure, to produce indenemonocarboxylic acid and fluorene-9-carboxylic acid, respectively. Diphenylurea was almost quantitatively recovered unchanged. Cyclohexanone was slightly carboxylated by the similar procedure. But acetonitrile, acetophenone, dibenzylketone, diphenylmethane, and xanthene were scarcely carboxylated.
REVISED STRUCTURE OF THE PRODUCT FROM ACETOPHENONE AND BENZONITRILE IN THE PRESENCE OF ALUMINUM CHLORIDE
Authors: Kashima Choji , Imada Satoshi , Nishio Takehiko 
Published: July 2006

Abstract
On the basis of 13C-nmr and chemical studies, the title product was concluded not to be N-(1-phenylethylidene)-β-aminochalcone (1-a), as first described by Barluenga and co-workers, but 4-methyl-2,4,6-triphenyl-4H-1,3-oxazine (1-b).
THE CRYSTAL STRUCTURE OF 7R(S),14S(R)-5,5,7,12,12,14-HEXAMETHYL-1,4,8,11-TETRAAZACYCLOTETRADECANENICKEL(II) CHLORIDE DIHYDRATE
Authors: Ito Tasuku , Toriumi Koshiro 
Published: July 2006

Abstract
The crystal structure of the title coumpound has been determined by the X-ray diffraction method. The nickel(II) ion is surrounded square-planarly by four nitrogen atoms of the macrocyclic ligand. The strong hydrogen-bond networks prevent the coordination of chloride ions and water molecules, yielding a diamagnetic nickel(II) complex.
ASYMMETRIC SYNTHESIS OF 3-SUBSTITUTED 3,4-DIHYDRO-β-CARBOLINONES
Authors: Wakabayashi Toshio , Watanabe Kenzo 
Published: July 2006

Abstract
A novel method of phase-transfer catalysed alkylation at C-3 position of 3,4-dihydro-β-carbolinones and an asymmetric synthesis of (S)-3-carbomethoxymethyl-9-methyl-3,4-dihydro-β-carbolinone (7) are reported.
ONE-STEP SYNTHESIS OF 2-ARYLETHENYL METHYL SULFIDES FROM ARYL ALDEHYDES AND DIMETHYL SULFOXIDE
Authors: Kojima Takakazu , Fujisawa Tamotsu 
Published: July 2006

Abstract
A facile method for preparing trans-α,β-unsaturated sulfides has been established by the reaction of aryl aldehydes with dimethyl sulfoxide in the presence of matallic sodium. The reaction proceeds through the selective reduction of an intermediate, 2-arylethenyl methyl sulfoxide, which also gives enol ethers by the reaction with sodium alkoxides.
THE REACTION OF ORGANOHALIDES WITH NICKEL CARBONYL IN THE PRESENCE OF OLEFIN OXIDES
Authors: Rhee Ilsong , Ryang Membo , Hasegawa Hideo , Murai Shinji , Sonoda Noboru 
Published: July 2006

Abstract
Reaction of aroyl- or alkenoylnickel carbonyl halide complexes, derived from the reaction of organohalides with nickel carbonyl, with olefin oxides afforded halohydrin esters.
MOLECULAR CONFORMATIONS OF TRI- THROUGH PENTAMETHYLENE GLYCOL DIMETHYL ETHERS AS MODEL COMPOUNDS OF POLYETHERS
Authors: Matsuura Hiroatsu , Murata Hiromu 
Published: July 2006

Abstract
Raman and infrared spectra were measured for CH3O(CH2)nOCH3(n=3–5) as model compounds of polyethers [–O(CH2)n–]p . The spectral observations, combined with the normal coordinate treatment, indicated that the conformational stabilities of the model compounds are closely related to the chain conformations of the polymers.
A NEW TISHCHENKO-TYPE ESTER FORMATION CATALYZED BY RUTHENIUM COMPLEXES
Authors: Horino Hiroshi , Ito Takashi , Yamamoto Akio 
Published: July 2006

Abstract
A self-condensation of aldehydes to yield esters is catalyzed by ruthenium complexes under mild conditions without appreciable side reactions. The reaction is applicable to both aliphatic and aromatic aldehydes, and the ruthenium complexes proved to be particularly active catalysts among other transition metal complexes examined.
MOLECULAR FORCE FIELD AND ROTATIONAL ISOMERISM OF ALKYL SELENIDES
Authors: Matsuura Hiroatsu , Ohno Keiichi , Murata Hiromu 
Published: July 2006

Abstract
The molecular force field of alkyl selenides was determined from about 100 observed vibrational frequencies. The force field was applied to larger molecules of butyl methyl, ethyl propyl, and dipropyl selenides to study the rotational isomerism. The conformational stability of the selenides was compared with that of sulfides and ethers.
PREPARATION OF NUCLEOSIDE 3′,5′-CYCLIC PHOSPHATES VIA 8-QUINOLYL NUCLEOSIDE 5′-PHOSPHATES AS A USEFUL INTERMEDIATE
Authors: Takaku Hiroshi , Kato Masaathu , Hata Tsujiaki 
Published: July 2006

Abstract
The intramolecular cyclization of 8-quinolyl nucleoside 5′-phosphates (1)with cupric chloride in pyridine led to the synthesis of nucleoside 3′,5′-phosphates (2) in good yields by fission of the P–O bond of 8-quinolyl esters of nucleoside 5′-phosphate.
BINUCLEAR METAL COMPLEXES. XXII. ANTIFERROMAGNETIC SPIN-EXCHANGE INTERACTION IN COPPER(II)-MANGANESE(II) HETERO-METAL COMPLEXES
Authors: Torihara Naoyuki , Okawa Hisashi , Kida Sigeo 
Published: July 2006

Abstract
Copper(II)-manganese(II) hetero-metal binuclear complexes with 3-formylsalicylic acid-diamine Schiff bases were synthesized and characterized. The cryomagnetic measurements demonstrated that an antiferromagnetic spin-exchange interaction operates between the metal ions, the exchange integral, J, being estimated at −22∼−44 cm−1.
SYNTHESIS OF ARYL IODIDES FROM ARYL HALIDES AND POTASSIUM IODIDE BY MEANS OF NICKEL CATALYST
Authors: Takagi Kentaro , Hayama Naomi , Okamoto Tadashi 
Published: July 2006

Abstract
Facile synthesis of aryl iodides from aryl halides was reported. NiBr2–Zn catalyzed the halogen exchange reaction of aryl bromides with potassium iodide under mild conditions. At elevated temperatures, NiBr2–PBu3 was an effective catalyst.
THERMAL AND PHOTOCHEMICAL CURTIUS TYPE REARRANGEMENT OF N-ACYL-S,S-DIPHENYLSULFIMIDES
Authors: Furukawa Naomichi , Nishio Takehiko , Fukumura Mitsuo , Oae Shigeru 
Published: July 2006

Abstract
Thermal decomposition of N-acyl-S,S-diphenylsulfimides(Ia–g) gave easily isocyanates(IIa–g) in high yields, together with diphenyl sulfide, while photolysis of Id afforded the insertion product(III), indicating the formation of singlet nitrene.
CATALYTIC PRE-WAVE OF NICKEL(II) AND FORMATION OF NICKEL SULFIDE IN THIOSULFATE SOLUTIONS AT MERCURY ELECTRODES
Authors: Itabashi Eiki 
Published: July 2006

Abstract
It was found that nickel(II) in thiosulfate solutions at mercury electrodes gave a catalytic pre-wave, and NiS was produced in the electroreduction process of nickel(II). The electrode reaction which is proceeded by the formation of Ni(S2O3) from Ni(H2O)62+ is retarded by the adsorption of NiS at higher concentrations of S2O32−. It has been proposed that the formation of NiS is due to the chemical reduction of S2O32− bound to Ni(O)S2O32− by the electroreduced metallic nickel.
STERIC CROWDING IN A HIGHLY POLARIZED [5.6.7]QUINARENE
Authors: Takahashi Kazuko , Sakae Toshisada , Takase Kahei 
Published: July 2006

Abstract
Sterically hindered 9,12-dicyano-7,13-dimethyl-10,11-diphenyl [5.6.7]quinarene (2) was spectroscopically investigated in order to clarify the effect of steric crowding on the structure of highly polarized [5.6.7]quinarenes. It has proved that the steric crowding caused a twisting of the molecule around the intercyclic bonds resulting in a further increase of charge separation and a decrease of electronic interaction among the three rings.
SYNTHESIS OF PYRIMIDINE PHOTOPRODUCTS: 6-[2′-OXO-1′,2′-DIHYDROPYRIMIDIN-4′-YL]-PYRIMIDIN-2,4-DIONE (URA[6-4]PYO) AND ITS 5-METHYL-DERIVATIVE (THY[6-4]PYO)
Authors: Taguchi Hiroyasu 
Published: July 2006

Abstract
Products formed in traces by the u.v. irradiation of DNA, Thy[6-4]pyo (5-methyl-6-[2′-oxo-1′,2′-dihydropyrimidin-4′-yl]-pyrimidin-2,4-dione) and Ura[6-4]pyo (6-[2′-oxo-1′,2′-dihydropyrimidin-4′-yl]-pyrimidin-2,4-dione) were synthesized in excellent yield from readily available 6-acetyl-pyrimidine derivatives.
ALKYLATION OF 2,4-DIMETHYL-3-FUROIC ACID AND SYNTHESIS OF 4,6-DIOXO-14-NORFURANOEUDESMANS
Authors: Tada Masahiro , Takahashi Takeyoshi 
Published: July 2006

Abstract
Treatment of 2,4-dimethyl-3-furoic acid in THF with LDA gave a dianion (A). Alkylation of A with methyl iodide, cyclohexanone, 2-methyl-2-cyclohexenone or 3-methoxy-2-cyclohexenone yielded the corresponding alkylated derivatives (2, 3, 4 or 5) respectively. The methyl ester (6) was treated with LiMe2Cu to give 4,6-dioxo-14-norfuranoeudesmane (7), a key intermediate for the synthesis of some eudesmanolides and elemanolides.
FLUORINATION OF ACTIVATED HALOGENS WITH KF IN POLYETHYLENE GLYCOL-ACETONITRILE SYSTEM
Authors: Kitazume Tomoya , Ishikawa Nobuo 
Published: July 2006

Abstract
Polyethylene glycol (mol. wei. 300–600) was found to be effective as a phase-transfer catalyst on the fluorination of activated halogen compounds with potassium fluoride in acetonitrile. Carboxylic and sulfonic acid chlorides were readily converted into their fluorides in high yields.