bluuebunny/crossref_metadata_2025_split huggingface dataset:
RADICAL POLYMERIZATION OF METHYL METHACRYLATE INITIATED WITH THE SYSTEM OF SODIUM CHONDOROITIN SULPHATE, Cu(II)-ION AND WATER
Authors: Ouchi Tatsuro , Yamada Takeshi , Imoto Minoru 
Published: July 2006

Abstract
It was found that an aqueous solution of sodium chondroitin sulphate (ChS-Na) can initiate a radical polymerization of methyl methacrylate (MMA) in the presence of Cu(II)-ion. The kinetic behavior with respect to ChS-Na and MMA was studied. The initiation mechanism was considered to be as follow: ChS-Na forms a hydrophobic area in water. MMA is incorporated into the area, where the complex of ChS/Cu(II)-ion/MMA/H2O generates free radicals of MMA, which initiate the polymerization.
INSERTION OF DIMETHYL ACETYLENEDICARBOXYLATE AND 2,5-NORBORNADIENE INTO THE Pd–C BOND OF THIOMETHOXYMETHYL-PALLADIUM DERIVATIVES
Authors: Yoshida Gohei , Kurosawa Hideo , Okawara Rokuro 
Published: July 2006

Abstract
Insertion of RC≡CR (R= COOCH3) or 2,5-norbornadiene into the Pd–C bond of Pd(Ph3P) (CH2SCH3) (OCOCF3) gave the corresponding cis-addition product in good yield. Pd(Ph3P) (CH2SCH3)Cl was unreactive toward RC≡CR (R= COOCH3), however, the reaction between these two compounds occurred readily by addition of catalytic amount of AgClO4 to give [Pd(CR=CRCH2SCH3)Cl]2 (R= COOCH3).
CONFORMATIONS ANALYSIS OF SOME CYCLIC PEPTIDES USING DIFFERENTIAL N-METHYLATION
Authors: Kawai Masao , Nagai Ukon 
Published: July 2006

Abstract
Partial N-methylation of peptides with CH3I–Ag2O in DMF constitutes a new potential method of conformational analysis. Reactivity of peptide NH′s with the methylating reagent reflects their degree of exposure to the solvent. The method was applied to the samples of micromolar quantities of a Gramicidin S derivative and two destruxins.
REARRANGEMENT OF CEPHALOSPORINS TO A PENICILLIN NUCLEUS BY THE REACTION WITH BENZYLSULFONYL CHLORIDE THROUGH A NEW EXTRUSION REACTION OF SULFUR DIOXIDE
Authors: Kobayashi Takeo , Hiraoka Tetsuo 
Published: July 2006

Abstract
Cephalosporins rearranged to penicillin derivatives on treatment with α-toluenesulfonyl chloride in the presence of a silylating reagent via 2,3-sigmatropic type reaction after extrusion of sulfur dioxide. This reaction also proceeded in the case of alkyl allylsulfide.
THE PARTIAL REDUCTION OF CARBOXYLIC ACIDS TO ALDEHYDES via 3-ACYLTHIAZOLIDINE-2-THIONES WITH DIISOBUTYLALUMINUM HYDRIDE
Authors: Izawa Toshio , Mukaiyama Teruaki 
Published: July 2006

Abstract
3-Acylthiazolidine-2-thiones (1), prepared from free carboxylic acids and thiazolidine-2-thione by using 2-chloro-1-methylpyridinium iodide in the presence of triethylamine, were reduced to the aldehydes with diisobutylaluminum hydride (DIBAH) in good yields even when excess amount of DIBAH was used.
FACILE OXIDATION OF THIOPHENOL BY ISOALLOXAZINE(FLAVIN) BOUND TO A CATIONIC MICELLE
Authors: Shinkai Seiji , Ando Reiko , Yoneda Fumio 
Published: July 2006

Abstract
Oxidation of thiophenol by isoalloxazines(flavin analogs) was found to proceed readily in a cationic micelle solution. The observed rate enhancement was related to the activation of the thiophenol anion in the hydrophobic environment of the micelle.
A NEW ROUTE TO OLEFINS FROM DITHIOCARBAMATES VIA S-ALKYLATION-ELIMINATION PROCESS. APPLICATION TO A STEREOSELECTIVE SYNTHESIS OF NATURALLY-OCCURRING TRIENES
Authors: Hayashi Toshio , Sakurai Akio , Oishi Takeshi 
Published: July 2006

Abstract
Alkyl 1-pyrrolidinecarbodithioates, when treated with an excess of methyl iodide in hexamethylphosphoric triamide, afforded trans-olefins stereoselectively in high yields. Naturally-occurring 2,4,6- and 1,3,5-undecatrienes and allo-ocimene were prepared.
REACTIONS OF PHENYLPYRYLIUM FLUOROBORATES WITH PYRIDINIUM-N-IMINE
Authors: Toda Takashi , Morino Hisayo , Suzuki Yoshizo , Mukai Toshio 
Published: July 2006

Abstract
Reactions of phenylpyrylium fluoroborates with pyridinium-N-imine afforded 3-substituted 2-phenyl-pyrazolo[1,5-a]pyridine derivatives.
RADIATION-INDUCED CHAIN ISOMERIZATION OF cis-2-BUTENE IN BENZENE SOLUTION
Authors: Harata Yasuo , Matsui Masao , Imamura Masashi 
Published: July 2006

Abstract
Radiation-induced isomerization of cis-2-butene was found to proceed in benzene solution by an ionic chain mechanism when total radiation dose is low. The yield of trans-2-butene reaches 103 in G unit under optimum conditions. Scavenging studies indicate that charge transfer from benzene cations to cis-2-butene and direct isomerization of cis-2-butene cations take place. Outlines of the results are presented.
A HIGHLY STABLE WATER-INSOLUBLE DERIVATIVE OF RIBONUCLEASE T1
Authors: Ito Hisashi , Hagiwara Masaaki , Ichikizaki Iwao , Takahashi Kenji 
Published: July 2006

Abstract
A water-insoluble derivative of ribonuclease T1 (RNase T1) was prepared by chemically combining RNase T1 with a copolymer of acrylamide and divinylbenzene (Enzacryl AH), and its enzymatic properties were examined. The enzyme derivative retained much of its original activity and was considerably more stable to heat and extremes of pH than the native enzyme.
A NEW METHOD FOR THE PREPARATION OF α -HYDROXY KETONES
Authors: Takeda Takeshi , Ueda Masahiro , Mukaiyama Teruaki 
Published: July 2006

Abstract
Various α-hydroxy ketones were prepared in good yields by reduction of α-ethoxycarbonylhydrazono ketones with NaBH4, followed by acid hydrolysis. α-Ethoxycarbonylhydrazono ketones were obtained in good yields by the treatment of Δ2-1,3,4-oxadiazolines, prepared from 1-(2-oxoalkyl)pyridinium salts and diethyl azodicarboxylate, with aqueous sodium hydroxide.
STRUCTURE OF ALNUSERIC ACID, THE FIRST REPORTED NATURALLY OCCURRING C31-SECODAMMARANE-TYPE TRITERPENE FROM ALNUS SERRULATOIDES CALL.
Authors: Hirata Toshifumi , Ideo Reiko , Suga Takayuki 
Published: July 2006

Abstract
A novel C31-3,4-secodammarane-type triterpene, alnuseric acid, was isolated from the male flowers of Alnus serrulatoides Call. (Betulaceae). Its structure was elucidated to be (20S,24R)-20 ,24-epoxy-24-methyl-3,4-secodammar-4(28)-en-3-oic acid (I) by a combination of chemical and spectroscopic methods.
ENANTIOFACE DIFFERENTIATING ASYMMETRIC REACTION BY p-TOLYLSULFINYLCARBANION
Authors: Kunieda Norio , Kinoshita Masayoshi , Nokami Junzo 
Published: July 2006

Abstract
The enantioface differentiating reaction by p-tolylsulfinylcarbanion(2), derived from (+)-(R)-methyl p-tolyl sulfoxide (1), toward unsymmetrical ketones (3) is described. The carbanion(2) readily reacts with 3 to produce a mixture of (RSRC)- and (RSSC)-β-hydroxy sulfoxides (4). The ratio of the diastereoisomers in 4 and the absolute configuration of the predominant diastereoisomer were determined with the aid of NMR and the specific rotation of alcohol(6) which was prepared by desulfurization of 4.
ON THE BAND STRUCTURE CALCULATION FOR MOLECULAR CRYSTALS OF THE SPACE GROUP P21/a
Authors: Aikawa Yosihiro , Shimoda Haruhisa , Sukigara Mitsunori , Honda Kenichi 
Published: July 2006

Abstract
The energy band structure of molecular crystals belonging to the space group P21/a, originally derived by Katz et al., is not valid. The correct band structure is derived by taking explicitly the nonspherical property of molecule in molecular crystals into consideration and using symmetry operator.
MICROWAVE SPECTRA OF DISILYLMETHANE
Authors: Hayashi Michiro , Kuginuki Yusho 
Published: July 2006

Abstract
Microwave spectra of disilylmethane[(SiH3)2CH2] and its deuterated species[(SiD3)2CH2] were measured. A plausible structure of the molecule was estimated from the rotational constants determined. Dipole moments were determined by Stark effect measurements. They were 0.813±0.013 D for the normal species and 0.802±0.010 D for the deuterated species. From the observed splittings of the spectra for the normal species, the barrier to SiH3 internal rotation was determined to be 1210±20 cal/mol by neglecting the two top coupling terms.
CATALYTIC ACTIVITIES OF CATIONIC RHODIUM COMPLEXES FOR THE HYDROGENATION OF STYRENE OXIDE
Authors: Mochida Isao , Shirahama Shin-ichi , Fujitsu Hiroshi , Takeshita Kenjiro 
Published: July 2006

Abstract
Cationic rhodium complexes were found to show catalytic activity for the hydrogenation of styrene oxide under atmospheric hydrogen at 30°. The identified products were β-phenylethyl alcohol and phenylacetaldehyde, both of which were formed by the cleavage of the same carbon–oxygen bond. The yield of the alcohol reached up to 59% after 20 hrs’reaction. However, neither secondary alcohol nor ketone was detected.
PALLADIUM CATALYZED THIENYLATION OF ALLYLIC ALCOHOLS
Authors: Yoshida Zen-ichi , Yamada Yoshimi , Tamaru Yoshinao 
Published: July 2006

Abstract
3-(2-Thienyl)-aldehydes and ketones were prepared by catalytic reaction with palladium acetate from 2-bromothiophene and five kinds of allylic alcohols.
ASYMMETRIC CROSS ALDOL SYNTHESIS. ASYMMETRIC ADDITION OF SILYL ENOL ETHER AND KETENE SILYL ACETAL TO α-KETO ESTERS
Authors: Ojima Iwao , Yoshida Katsuhiko , Inaba Shin-ichi 
Published: July 2006

Abstract
Asymmetric cross aldol synthesis was carried out by the reaction of several silyl enol ethers and ketene silyl acetals with (−)-menthyl pyruvate and phenylglyoxylate. The extent of asymmetric induction realized in the reaction was determined to be in the range 18-68% by nmr using a shift reagent, Eu(fod)3, and was considerably larger than that observed in the reaction of the chiral α-keto esters with Grignard reagents.
DIANIONS OF ETHYL α-MERCAPTOACETATE AND ETHYL α-MERCAPTO-PROPIONATE: A NEW METHOD FOR AN EFFICIENT SYNTHESIS OF α,β-UNSATURATED ESTERS FROM CARBONYL COMPOUNDS
Authors: Tanaka Kazuhiko , Yamagishi Nobuyuki , Tanikaga Rikuhei , Kaji Aritsune 
Published: July 2006

Abstract
Ethyl α-mercaptoacetate and ethyl α-mercaptopropionate dianions were found to be useful reagents for the synthesis of α,β-unsaturated esters from carbonyl compounds by a single operation under mild conditions. Highly substituted α,β-unsaturated esters could be prepared by this method. The application to the synthesis of a component of ant mandibular gland secretions was described.
DETERMINATION OF THE APPARENT BINDING CONSTANT OF COBALT CARBONIC ANHYDRASE B BY THE KINETIC METHOD
Authors: Kidani Yoshinori , Hirose Junzo 
Published: July 2006

Abstract
The second order rate constant (kf) for the formation of Co(II) complex of bovine carbonic anhydrase and the first order rate constant (kd) for dissociation of the cobalt-carbonic anhydrase into apoenzyme and Co(II) ion were measured at 0° (pH 5.0) by a catalytic assay method involving p-nitrophenyl acetate as a substrate. The first order rate constant (kd) has been determined by use of a chelating agent as a scavenging agent for apoenzyme. Combination of kf with kd gives apparent binding constant (Kbind) for cobalt-carbonic anhydrase. This value (Kbind=kf/kd) was consistent with that obtained by the equilibrium dialysis.
A SYNTHESIS OF β-VETIVONE BY BASE-CATALYZED SPIROANNELATION OF PHENOLIC TOSYLATE
Authors: Uneyama Kenji , Okamoto Kaoru , Torii Sigeru 
Published: July 2006

Abstract
β-Vetivone 8 and C10-epimer were synthesized by base-catalyzed spiroannelation of phenolic tosylate 5.
PHOTOENOLIZATION OF 2-METHYLBENZOPHENONE
Authors: Uji-Ie Koji , Kikuchi Koichi , Kokubun Hiroshi 
Published: July 2006

Abstract
Two kinds of transient absorption spectra were obtained for the ethanol solution of 2-methylbenzophenone by conventional and laser flash photolysis. The short-lived transient was assigned to the cis-enol and the long-lived to the trans-enol. These transients arise separately from the different excited states.
THE WITTIG-TYPE AND THE CLAISEN REARRANGEMENT OF ALLYLIC 3-PHENYLTHLO-2-PROPEN-1-YL ETHERS
Authors: Wada Makoto , Fukui Akira , Nakamura Hideo , Takei Hisashi 
Published: July 2006

Abstract
Allylic 3-phenylthio-2-propen-1-yl ethers(3) underwent [2,3]-sigmatropic (Wittig-type) rearrangement by treatment of n-butyllithium in tetrahydrofuran (THF) at −40 ∼ −50°C to give the corresponding allylic alcohols (7). On the other hand, the allylic ethers 3 were treated with potassium tert-but oxide in tert-butyl alcohol-N,N-dimethylformamide (DMF) at room temperature to give the corresponding allylic enol ethers (12), which isomerized to the corresponding aldehydes (13) on heating in xylene by the Claisen rearrangement.
NEW HIGHLY STRAINED UNSATURATED PROPELLANES, [4.2.2]PROPELLA-2,4,7-TRIENES
Authors: Toda Fumio , Yoshioka Takayuki 
Published: July 2006

Abstract
Cycloaddition of tetracyanoethylene to the benzene nucleus of 2,7-di-tert-butyl-4,5,9,10-tetra(p-halophenyl)tricyclo[6.2.0.3,6]deca-1,3(6),4,7,9-pentaene (1) afforded the title propellane, 2,7-di-tert-batyl-11,11,12,12-tetracyano-4,5,9,10-tetra(p-halophenyl)tetracyclo[6.2.2.0.03,6]dodeca-2,4,6,9-tetraene (2).
A CONVENIENT METHOD FOR THE PREPARATION OF CARBODIIMIDES USING 2-CHLOROPYRIDINIUM SALT
Authors: Shibanuma Tadao , Shiono Manzo , Mukaiyama Teruaki 
Published: July 2006

Abstract
Aromatic and aliphatic carbodiimides are prepared in good yields by treating N,N′-disubstituted thioureas with 2-chloro-1-methylpyridinium salt in the presence of triethylamine.
MASS SPECTROMETRIC STUDY ON CHEMICAL TRANSPORT REACTION
Authors: Kyoto Michihisa , Bando Yoshichika , Takada Toshio 
Published: July 2006

Abstract
In order to study closed-tube chemical transport reaction process, a mass spectrometer was coupled to a reaction tube. The gases in the ZnO–NH4Cl transport reaction were analysed with this apparatus. The gas species were Zn, ZnCl2, N2, H2O, HCl, and NH3.
THIELE ACETYLATION OF p-TROPOQUINONE, AN ABNORMAL RING CONTRACTION
Authors: Hirama Masahiro , Itô Shô 
Published: July 2006

Abstract
Thiele type acylation reaction of p-tropoquinone 1, a novel nonbenzenoid quinone, in the presence of sulfuric acid, resulted in the unexpected ring contraction to a benzaldehyde derivative 2, in addition to a tropone 3. It was proved in this reaction that acetoxyl group attacked C3 exclusively and that the carbon became aldehydic. In the reaction catalyzed by BF3, regioselectivity of the nucleophilic attack was reduced to 4:1 (C3:C4) yielding 9, 10, and 11, all seven-membered ring compounds. Plausible mechanisms for the all reaction pathways are proposed.
NEW SYNTHETIC REACTIONS BASED ON 1-METHYL-2-FLUOROPYRIDINIUM SALTS. STEREOSPECIFIC PREPARATION OF PRIMARY AMINES FROM ALCOHOLS
Authors: Hojo Ko , Kobayashi Susumu , Soai Kenso , Ikeda Shigeru , Mukaiyama Teruaki 
Published: July 2006

Abstract
Treatment of various alcohols with 1-methyl-2-fluoropyridinium salt and lithium azide afforded corresponding alkyl azides, which were converted to primary amines by reduction. The overall reactions proceeded with inversion of configuration.
METALLOPORPHYRINS. II. SYNTHESIS AND VISIBLE SPECTRA OF BIS- AND TRIS-PORPHYRINS AND THEIR METAL COMPLEXES
Authors: Ichimura Kunihiro 
Published: July 2006

Abstract
The acyl chloride of monomethyl ester of mesoporphyrin-IX (6) was treated with porphyrins having monohydroxy and dihydroxy groups (3 and 4) to afford single-bridged bis- and trisporphyrins (7 and 10), respectively. The diacyl chloride of mesoporphyrin-IX (8) was treated with the dihydroxy porphyrins (4) to give double-bridged bisporphyrin (9). The visible spectra of the free base and the metal complexes of the multiporphyrins are found to be distinguishable from those of mesoporphyrin-IX dimethylester (5) and its metal complexes. The chromophores in the multiporphyrin systems interact strongly intramolecularly.
PHOTOUREIDOMETHYLATION OF CYANOBENZENES WITH TETRAMETHYLUREA
Authors: Tsujimoto Yuji , Hayashi Mitsunori , Nishimura Yoshiyuki , Miyamoto Takuji , Odaira Yoshinobu 
Published: July 2006

Abstract
Novel ureidomethylation to an aromatic ring occurred easily, when a mixture of tetramethylurea and cyanobenzenes in acetonitrile was irradiated.
DEMONSTRATION OF BASE-PAIRING BETWEEN 2-SUBSTITUTED ADENINE AND URACIL DERIVATIVES IN AQUEOUS AND NON-AQUEOUS SOLUTION
Authors: Higuchi Shigesada , Dezaki Youko 
Published: July 2006

Abstract
Interaction of 2-substituted adenine derivatives were studied spectrophotometrically. They are able to base-pair with uracil either of a polymerized form in aqueous solution or of a monomeric form in non-aqueous solution. The Hoogsteen type base-pairing is possibly formed between the 2-substituted adenine and uracil. A model is raised in which a conformational change of tRNA anticodon region occurs through the formation of base-pairing between the modified adenosine and uridine.
GERMANICOL, A NEW BACKBONE REARRANGEMENT PRODUCT OF 3β,4β-EPOXYERIEDELANE
Authors: Tori Motoo , Tsuyuki Takahiko , Takahashi Takeyoshi 
Published: July 2006

Abstract
Treatment of 3β,4β-epoxyfriedelane (2) with BF3–Et2O in benzene at room temperature gave germanicol (7; main product), besides the known rearranged products (4, 5, and 6). Germanicol is the first example of product in which a backbone rearrangement of friedelane-oleanane-type effected up to E-ring.
A NEW TRIAL FOR THE SYNTHESIS OF DIRECT DYES TO REPLACE BENZIDINE TYPE DYE (1)—TRISAZO DYES FROM 3,5-BIS(p-AMINOPHENYL)-1,2,4-TRIAZOLE, 2,5-BIS(p-AMINOPHENYL)-1,3,4-OXADIAZOLE AND 2,5-BIS(p-AMINOPHENYL)IMIDAZOLE
Authors: Yamase Iroh , Saito Gen-ichi , Kotone Akira , Konishi Kenzo , Kitao Teijiro 
Published: July 2006

Abstract
New trisazo dyes from 3,5-bis(p-aminophenyl)-1,2,4-triazole and 2,5-bis(p-aminophenyl)-1,3,4-oxadiazole which are found to have no toxicity and no carcinogenicity, and 2,5-bis(p-aminophenyl)imidazole have been prepared to replace benzidine type dye, Direct Deep Black EX. Dyeing with these dyes was carried out on cotton, silk, wool and 6-nylon. These dyes have been shown to have very good dye-ability and also to be very similar to benzidine type dye in colour and fastnesses to light and washing.
STRUCTURE OF ALNUSELIDE, THE FIRST REPORTED NATURALLY OCCURRING C31-SECODAMMARANE-TYPE TRITERPENE LACTONE FROM ALNUS SERRULATOIDES
Authors: Hirata Toshifumi , Ideo Reiko , Suga Takayuki 
Published: July 2006

Abstract
A novel C31-3,4-secodammarane-type triterpene lactone, alnuselide, was isolated from the male flowers of Alnus serrulatoides Call. (Betulaceae). The structure of alnuselide was elucidated to be (11R,20S,24R)-20,24-epoxy-24-methyl-3,4-secodammar-4(28)-en-3,11-carbolactone (I) by a combination of the chemical and spectroscopic methods and the synthesis.
A CONVENIENT METHOD FOR THE PREPARATION OF 3-SUBSTITUTED FURANS
Authors: Kotake Hiroshi , Inomata Katsuhiko , Aoyama Shin-ichi , Kinoshita Hideki 
Published: July 2006

Abstract
It was found that ethyl 4,4-dimethoxy-2-phenylthiobutyrate is an useful reagent for the preparation of 3-substituted furans from alkyl halides. 3-Benzylfuran, 3-geranylfuran (nordendrolasin), and 3-octadecylfuran were prepared by the method in good yields.
REACTIONS OF α-KETOSULFENES WITH CYCLIC NITRONES
Authors: Tsuge Otohiko , Noguchi Michihiko 
Published: July 2006

Abstract
Benzoylsulfene 1 and two cyclic α-ketosulfenes 2 and 3, generated in situ from the corresponding sulfonyl chlorides and triethylamine, react with 1-pyrroline 1-oxides to produce the corresponding cis-s-cis β-aminoenones and/or β-imino sulfonic acids, whose relative yields greatly depended on the nature of solvents employed. The reaction pathways are also described.
ASYMMETRIC REDUCTION OF ACETOPHENONE WITH CHIRAL HYDRIDE REAGENT PREPARED FROM LITHIUM ALUMINIUM HYDRIDE AND (S)-2-(ANILINOMETHYL)PYRROLIDINE
Authors: Mukaiyama Teruaki , Asami Masatoshi , Hanna Jun-ichi , Kobayashi Susumu 
Published: July 2006

Abstract
(S)-2-(Anilinomethyl)pyrrolidine (1), new chiral diamine, is easily prepared by four steps starting from (S)-proline. Asymmetric reduction of acetophenone with chiral hydride reagent, prepared from (1) and lithium aluminium hydride, gives (S)-1-phenylethanol in 92% optical yield (93% yield).
THE SYNTHESIS OF HIGHLY STABLE o- AND p-QUINONE METHIDES
Authors: Nakayama Jyuzo , Yamashita Kuniko , Hoshino Masamatsu , Takemasa Toshiro 
Published: July 2006

Abstract
The reactions of 2,4- and 2,6-disubstituted phenols with two molar amounts of 1,3-benzodithiolylium tetrafluoroborate in acetonitrile at room temperature followed by treatment with triethylamine afforded the highly stable quinone methides, 2-(1,3-benzodithiol-2-ylidene)-3,5-cyclohexadien-1-ones and 4-(1,3-benzodithiol-2-ylidene)-2,5-cyclohexadien-1-ones, respectively, in good yields.
EXTRACTION OF METAL IONS FROM TRICHLOROACETIC ACID SOLUTIONS TO POLAR SOLVENTS
Authors: Kiba Toshiyasu , Imura Hisanori , Honjo Takaharu 
Published: July 2006

Abstract
Cs(I), Ca(II), Ba(II), Co(II), Mn(II), Hg(II), Al(III), Cr(III), Fe(III), Tm(III), Bi(III) and Th(IV) in trichloroacetic acid-sodium trichloroacetate buffer solutions have been readily extracted with polar solvents which have donor oxygen atom, e.g. alcohols,ketones,esters and ethers, without any additional extracting reagent.
A NEW OXANYLATION OF ALCOHOLS UNDER NEUTRAL CONDITIONS
Authors: Abe Kyo , Sato Takanori , Nakamura Nobuo , Sakan Takeo 
Published: July 2006

Abstract
N-(2-Oxanyloxy)succinimide transfered its oxanyl group to alkoxide anions and carbanions to give oxanylated products (3a–3c and 5a–5d) under almost neutral condition.
EFFECT OF PRESSURE ON IODINE COMPLEX WITH DIETHYL ETHER IN n-HEPTANE
Authors: Sawamura Seiji , Taniguchi Yoshihiro , Suzuki Keizo 
Published: July 2006

Abstract
The equilibrium constant K and the volume change ΔV accompanying the formation of diethyl ether-iodine complex in n-heptane was estimated by measuring the visible absorption spectra up to 3300 bar at 25°C. The ΔV value of −6.7±1.0 cm3/mol accompanying the complex formation is comparable with that of −2.8 or −6.4 cm3/mol estimated by the X-ray data.
MONOALKYLATION OF METHYL CYANOACETATE AND ACETYLACETONE USING 1,8-DIAZA-BICYCLO[5.4.0]UNDECENE-7
Authors: Ono Noboru , Yoshimura Tetsuji , Tanikaga Rikuhei , Kaji Aritsune 
Published: July 2006

Abstract
A simple method for selective monoalkylation of methyl cyanoacetate and acetylacetone using 1,8-diaza-bicyclo[5.4.0]undecene -7(DBU) as a base is described.
ELECTROCHEMICAL PHOTOCELL USING SPRAYED CdS FILM ELECTRODE
Authors: Minoura Hideki , Nakamura Tsuyoshi , Ueno Yasusada , Tsuiki Masayasu 
Published: July 2006

Abstract
Photoelectrochemical studies of CdS film deposited by chemical spray deposition onto the glass substrate covered with a conducting SnO2 layer were performed in aqueous sulfide or polysulfide solution. Similar behavior to that obtained with a single crystal or a sintered CdS electrode was observed. It is concluded that this sprayed CdS film electrode can be effectively used as the anode of the electrochemical photocell, CdS/aqueous polysulfide electrolyte/Pt, in which CdS anode is illuminated through SnO2-coated glass.
STRUCTURE OF ALNUSEROL, THE FIRST REPORTED NATURALLY OCCURRING 11-HYDROXYLATED C31-DAMMARANE-TYPE TRITERPENE
Authors: Hirata Toshifumi , Murai Kyoko , Suga Takayuki , Christensen Arild 
Published: July 2006

Abstract
Molecular structure and absolute configuration of alnuserol, a novel C31-triterpene isolated from Alnus serrulatoides Call., were determined to be (20S,24R)-20,24-epoxy-11α-hydroxy-24-methyldammaran-3-one (I) by a combination of X-ray crystallography and circular dichroism measurements.
STEREOSELECTIVE HYDROGENATION OF UNHINDERED CYCLOHEXANONES TO AXIAL ALCOHOLS WITH RHODIUM CATALYST
Authors: Nishimura Shigeo , Ishige Masayoshi , Shiota Michio 
Published: July 2006

Abstract
Hydrogenation of unhindered cyclohexanones with rhodium catalyst in isopropyl alcohol or tetrahydrofuran in the presence of hydrochloric acid gives excellent yields of axial alcohols. Steroidal 3,17- and 3,20-diones are selectively hydrogenated at C-3 to give the corresponding 3-axial-hydroxy ketones in high yields.
MOLECULAR ORBITALS OF ANTIAROMATIC MOLECULES: CYCLIC POLYMETHINES (CH)3 and (CH)4
Authors: Yamaguchi Kizashi , Nishio Akinobu , Fueno Takayuki 
Published: July 2006

Abstract
The contour maps of the highest occupied (HO) corresponding orbitals (CMO) of cyclic polymethines (CH)n(n=3,4) are presented in order to clarify the electron localizations which are closely related with the electron destabilizations in antiaromatic molecules. The symmetry and stability of the HO CMO’s are also discussed in relation to the correlation effect between diradical electrons.