bluuebunny/crossref_metadata_2025_split huggingface dataset:
RESPONSE OF A SOLID-STATE POTENTIOMETRIC SENSOR USING LaF3 TO A SMALL AMOUNT OF H2 OR CO IN AIR AT LOWER TEMPERATURES
Authors: Kuwata Shigeki , Miura Norio , Yamazoe Noboru , Seiyama Tetsuro 
Published: July 2006

Abstract
A solid electrolyte cell using LaF3 was found to be able to detect a small amount of H2 or CO in air at lower temperatures. The 90% response of the electromotive force (EMF) of the sensor to 1.3% H2 in air was as fast as 3 min at 20 °C. The sensing mechanism is attributed to a mixed electrode potential on the sensing electrode.
MÖSSBAUER SPECTROSCOPIC STUDIES OF MERCURY(II) CHLORIDE ADDUCTS OF BIFERROCENE AND BIFERROCENYLENE
Authors: Watanabe Masanobu , Suto Kyoko , Motoyama Izumi , Sano Hirotoshi 
Published: July 2006

Abstract
Biferrocene and biferrocenylene react with HgCl2 in diethyl ether to give their HgCl2 adducts. In the 57Fe-Mössbauer spectrum, the former shows a large quadrupole splitting value, suggesting the presence of a direct interaction between the Fe and Hg atoms and the latter shows a smaller quadrupole splitting value, indicating the presence of the averaged-valence state of Fe(II) and Fe(III).
SOLVENT EFFECTS ON THE COPOLYMERIZATION OF 5-HEXENE-2,4-DIONE AND STYRENE
Authors: Masuda Seizo , Tanaka Masami , Ota Tadatoshi 
Published: July 2006

Abstract
Solvent effects on the copolymerization of 5-hexene-2,4-dione and styrene have been studied. The contributions of polarity and polarizability effects and of monomer-solvent interactions were estimated according to the “Solvatochromic Comparison Method” developed by Taft et al.
STEREOSELECTIVE SYNTHESIS OF DIMETHYL TETRACYCLO[5.2.1.02.6.03.8]DECANE-7,8-DICARBOXYLATE
Authors: Camps Pelayo , Castañe Joan , Santos María Teresa 
Published: July 2006

Abstract
A short synthesis of the titled compound, a possible intermediate to prepare dodecahedrane, whose key-steps are the stereoselective trimethylene-annelation in the C2 and C3 positions of dimethyl 7,7-diethoxynorbornane-2,3-dicarboxylate and the high-yield intramolecular C–H insertion of a carbene generated from a 10-oxotricyclo[5.2.1.02.6]decane derivative, is described.
SYNTHESIS OF 2,6-DIACETYL-4-C(β-d-GLUCOPYRANOSYL)-4-HYDROXYCYCLOHEXANE-1,3,5-TRIONE AND ITS ACID HYDROLYSIS
Authors: Obara Heitaro , Matsui Yuzo , Namai Sozo , Machida Yoshihisa 
Published: July 2006

Abstract
2,6-Diacetyl-4-C-(β-d-glucopyranosyl)-4-hydroxycyclohexane-1,3,5-trione was obtained by the deacetylation of 2,6-diacetyl-4-C-(2,3,4,6-tetra-O-acetyl-β-d-glucopyranosyl)-4-hydroxycyclohexane-1,3,5-trione which prepared by the C-glucosylation of 2,6-diacetyl-1,3,4,5-benzenetetrol with 2,3,4,6-tetra-O-acetyl-α-d-glucopyranosyl bromide. The acid hydrolysis of this new C-glucoside was investigated.
MAJOR AQUEOUS CHLORINATION PRODUCTS OF OXIDIZED FULVIC ACID
Authors: Arai Hidehiko , Arai Michimasa , Sakumoto Akihisa 
Published: July 2006

Abstract
Dichloro- and trichloroacetic acids as well as chloroform were identified as the major chloroorganics formed by chlorination of an aqueous solution of fulvic acid extracted from leaf mold (a model raw drinking water) oxidized with ozone or by a simultaneous use of ozone and ionizing radiation.
Zr-CATALYZED OXIDATION OF ALCOHOLS TO ALDEHYDES IN THE PRESENCE OF tBuOOH. HIGH REACTIVITY FOR PRIMARY AND ALLYLIC HYDROXYL FUNCTIONS
Authors: Kaneda Kiyotomi , Kawanishi Yasuyuki , Teranishi Shiichiro 
Published: July 2006

Abstract
ZrO(OAc)2 catalyzes selective oxidation of primary alcohols to aldehydes without formation of carboxylic acids and also chemoselective oxidation of allylic alcohols to α,β-unsaturated aldehydes in the presence of tBuOOH.
SYNTHESIS OF FUSICOCCA-2,8,10-TRIENE, A BIOGENETIC MISSING LINK, STARTING FROM STEREOSPECIFIC CONDENSATION OF TWO IRIDOID SYNTHONS
Authors: Takeshita Hitoshi , Kato Nobuo , Nakanishi Kohji , Tagoshi Hirotaka , Hatsui Toshihide 
Published: July 2006

Abstract
From two units of iridoid C10-synthons which could be prepared from one of the photoadducts of isoprene and methyl 2,4-dioxopentanoate, the hydrocarbon which can be designated as fusicocca-2,8,10-triene, a missing link in the biogenesis, was stereospecifally synthesized.
PREPARATION OF 1-ALKENYL PHENYL SULFIDES BY THE NICKEL(II)-COMPLEXES CATALYZED COUPLING REACTION OF 3-METHOXY-1-PHENYLTHIO-1-PROPENE WITH GRIGNARD REAGENTS
Authors: Sugimura Hideyuki , Takei Hisashi 
Published: July 2006

Abstract
The reaction of 3-methoxy-1-phenylthio-1-propene with aryl and primary alkyl Grignard reagents in the presence of nickel(II)–phosphine complexes in benzene or toluene proceeded chemo- and regioselectively to give 1-alkenyl phenyl sulfides in high yields.
ELECTROCHEMICAL BEHAVIORS OF ELECTRODEPOSITED POLY(N,N-DIMETHYLANILINE). A NEW ORGANIC SEMICONDUCTING ION-EXCHANGE POLYMER
Authors: Kitani Akira , Yano Jun , Sasaki Kazuo 
Published: July 2006

Abstract
Poly(N,N-dimethylaniline) film, deposited electrochemically on a Pt surface, is a semiconductor having an anion exchange ability. Electrochemical behaviors of poly(N,N-dimethylaniline) electrodes are remarkably different from those of polyaniline electrodes.
Li|LiI|IODINE GALVANIC CELLS USING IODINE-POLY(2,5-THIENYLENE) ADDUCTS AS ACTIVE MATERIALS OF POSITIVE ELECTRODES
Authors: Yamamoto Takakazu , Zama Masanobu , Yamamoto Akio 
Published: July 2006

Abstract
Iodine adducts of poly(2,5-thienylene) serve as good active materials of positive electrodes of Li|LiI| iodine galvanic cells. Discharge curves of the galvanic cells at 500 kΩ load show stable voltage (2.8–2.3 V) until about 85% of iodine added is consumed in the cell reaction.
NOVEL SYNTHESIS OF 3-(N-SUBSTITUTED AMINO)-1-ISOINDOLENONES FROM 2-CYANOBENZALDEHYDE WITH AMINES
Authors: Sato Ryu , Senzaki Toshihide , Goto Takehiko , Saito Minoru 
Published: July 2006

Abstract
Various 3-(N-substituted amino)-1-isoindolenones were readily synthesized quantitatively by reactions of 2-cyanobenzaldehyde with amines at low temperature such as 20 °C.
A MODEL STUDY OF REGENERATION PROCESS IN RHODOPSIN VISUAL CYCLE
Authors: Sakurai Minoru , Shirota Osamu , Inoue Yoshio , Chûjô Riichirô 
Published: July 2006

Abstract
The regeneration process in rhodopsin was studied by an estimation of isomer population at photoequilibrium for the model compounds of N-retinylidene phosphatidylethanolimine. We suggested that the preferential formation of 11-cis isomer may be induced by the through-bond effect of oxygen atom of imine moiety of a Schiff base.
TWO NEW SESQUITERPENOIDS (ALPINOLIDE AND HANAMYOL) FROM ALPINIA JAPONICA (THUNB.) MIQ.
Authors: Itokawa Hideji , Morita Hiroshi , Watanabe Kinzo , Takase Akiko , Iitaka Yoichi 
Published: July 2006

Abstract
Two new sesquiterpenoids (alpinolide and hanamyol) were isolated from Alpinia japonica (THUNB.) MIQ. and the structures were determined by the spectral, the chemical evidence and X-ray analysis. The chemical transformation of hanalpinol into alpinolide may suggest the biogenesis of furopelargone A and B.
THE MICHAEL REACTION OF 2-(PHENYLTHIO)-2-PENTEN-5-OLIDE WITH SOME BENZYLIC GRIGNARD REAGENTS. SYNTHESIS OF SECOCRISPIOLIDE
Authors: Kato Michiharu , Ouchi Akihiko , Yoshikoshi Akira 
Published: July 2006

Abstract
The electrophilic reactivity of 2-(phenylthio)-2-penten-5-olide toward some benzylic Grignard reagents was investigated, and 2-methylene-3-(2,6-dimethylbenzyl)-5-pentanolide (secocrispiolide) was synthesized from one of the Michael adducts.
ERYTHRO-SELECTIVE ALDOL REACTION USING PHENYLDICHLOROBORANE
Authors: Hamana Hiroshi , Sasakura Kazuyuki , Sugasawa Tsutomu 
Published: July 2006

Abstract
High erythro-selectivity could be attained in the aldol reaction of ethyl ketones with aldehydes using phenyldichloroborane in the presence of ethyldiisopropylamine.
HETEROGENEOUS ASYMMETRIC HYDROGENATION OF CHIRAL DEHYDROTRIPEPTIDES
Authors: Takasaki Michiaki , Harada Kaoru 
Published: July 2006

Abstract
Asymmetric catalytic hydrogenation of chiral tripeptides containing a dehydroalanine residue were carried out using palladium on charcoal as a catalyst. The asymmetric yield of the resulting alanine was in the range of 43 to 93%.
PRACTICAL SYNTHESIS AND POLYMERIZATION OF TRIFLUOROVINYLSILANES. A POSSIBLE PRECURSOR OF POLY(DIFLUOROACETYLENE)
Authors: Hiyama Tamejiro , Nishide Kiyoharu , Obayashi Michio 
Published: July 2006

Abstract
An improved procedure for the preparation of trifluorovinylsilanes was established which involved addition of butyllithium to a mixture of chlorosilanes and commercially readily available chlorotrifluoroethylene at −78 to −130 °C, and the resulting monomer was polymerized with a catalyst such as CsF or (R2N)3S+ F2SiMe3− to give black metallic polymer which showed conductivity of 10−9 to 10−10 Ω−1cm−1.
ENANTIOSELECTIVE SYNTHESIS OF MONOFLUORINATED MALONIC ACID MONOESTERS WITH ENZYMES OF MICROBIAL ORIGIN
Authors: Kitazume Tomoya , Sato Takehiko , Ishikawa Nobuo 
Published: July 2006

Abstract
The optically active (+)- and (−)-2-fluoro-2-substituted malonic acid monoesters useful as the practical chiral synthon were obtained by the microbial hydrolysis of the corresponding malonic acid diesters with esterases or cellulases.
INTRODUCTION OF CENTER OF CHIRALITY INTO FLUOROCOMPOUNDS BY MICROBIAL TRANSFORMATION OF 2,2,2-TRIFLUOROETHANOL
Authors: Kitazume Tomoya , Ishikawa Nobuo 
Published: July 2006

Abstract
2,2,2-Trifluoroethanol is found to be a valuable synthetic tool proceeding to the chiral trifluoromethylated compounds via enantiotopic differentiating reaction and carbon-carbon bond formation with active fermenting baker’s yeast.
MgBr2-PROMOTED ELECTROSYNTHESIS OF SULFENIMINES (THIOOXIMES) FROM α-AMINOALKANOATES AND DIARYL/DIALKYL DISULFIDES IN A CH2Cl2–H2O TWO-PHASE SYSTEM. A STRAIGHTFORWARD PREPARATION OF C(6)/C(7)-SULFENIMINE DERIVATIVES OF PENICILLIN AND CEPHALOSPORIN
Authors: Torii Sigeru , Tanaka Hideo , Hamano Sin-ichi , Tada Nobuhito , Nokami Junzo , Sasaoka Michio 
Published: July 2006

Abstract
Direct transformation of α-aminoalkanoates and diaryl or dialkyl disulfides to the corresponding sulfenimines by electrolysis in a CH2Cl2–H2O–MgBr2-(Pt electrodes) system and its application to the sulfenylation of C(6)/C(7)-amino groups of penicillin and cephalosporin are described.
A CONVENIENT METHOD FOR THE SYNTHESIS OF α-PHENYLTHIO-α,β-UNSATURATED KETONE BY STANNOUS TRIFLATE PROMOTED REARRANGEMENT OF α-SULFINYL KETONE
Authors: Akiyama Takahiko , Iwakiri Hiroshi , Shimizu Makoto , Mukaiyama Teruaki 
Published: July 2006

Abstract
α-Phenylthio-α,β-unsaturated ketones are prepared in fairly good yields on treatment of α-sulfinyl ketone with stannous triflate. α-Phenylthio-α,β-unsaturated cyanides are also prepared from α-sulfinyl cyanides according to the similar procedure.
SINGLET-PHOTOSENSITIZED RING-SPLITTING AND ISOMERIZATION REACTIONS OF 1,2-DIPHENYLCYCLOBUTANE BY AROMATIC NITRILES. A POSSIBLE PROBE FOR RELATIONSHIPS BETWEEN REACTIVITIES AND ELECTRONIC NATURE OF EXCIPLEX INTERMEDIATES
Authors: Pac Chyongjin , Fukunaga Takao , Ohtsuki Tomohito , Sakurai Hiroshi 
Published: July 2006

Abstract
The photosensitized reactions of cis-1,2-diphenylcyclobutane by 1,4-dicyanonaphthalene and 9,10-dicyanoanthracene gave styrene, the trans isomer, and 1-phenyltetralin whereas the photosensitization by 1-cyanonaphthalene effected the ring-splitting and cis,trans-isomerization reactions without the formation of 1-phenyltetralin. Similar reactions of the trans isomer were photosensitized by the aromatic nitriles though the trans,cis isomerization did not occur. Features of the reactions were discussed in terms of exciplex intermediates of different charge-transfer and excitation-resonance contributions.
IN VITRO CONVERSION OF HUMULENE TO (±)-PENTALENOLACTONE G, H, AND PENTALENOLACTONE
Authors: Ohtsuka Toshikazu , Shirahama Haruhisa , Matsumoto Takeshi 
Published: July 2006

Abstract
Pentalenolactone (PL), PLH, and PLG were derived from 3,6-epoxy -3,6-seco-7(13)-protoilluden-10-ol which in turn was obtained from humulene. Conformation of PL’s was studied by NMR.
THE BROMINATION OF METHYLARENES WITH NBS BY IRRADIATION USING A TUNGSTEN LAMP. PREPARATION OF BENZOTRIBROMIDES
Authors: Mataka Shuntaro , Kurisu Masayoshi , Takahashi Kazufumi , Tashiro Masashi 
Published: July 2006

Abstract
Bromination of toluene and its meta- and para-substituted derivatives with NBS by irradiation using a tungsten lamp gave benzotribromides and cis- and trans-1,2-dibromo-1,2-diarylethylenes, while ortho-substituted toluenes gave benzal bromides. o-Xylene gave tetra- and pentabromides and m-xylene afforded a mixture of dibromodiarylethylenes.
PREPARATION OF OPTICALLY ACTIVE 1,6,12c,12d-TETRAMETHYL-12c,12d-DIHYDROCORONENE WITH KNOWN ABSOLUTE CONFIGURATION
Authors: Yamamoto Koji , Ueda Tatsuo , Yumioka Hiriya , Okamoto Yoshio , Yoshida Toshikatsu 
Published: July 2006

Abstract
Starting from (M)-(−)-dibromopentahelicene derivative, the novel optically active dihydrocoronene with known absolute configuration was synthesized.
A NEW AND CONVENIENT SYNTHESIS OF ARYL-SUBSTITUTED BUTATRIENES USING NICKEL-CATALYZED COUPLING OF ARYL-SUBSTITUTED 1,1-DIBROMOETHENES
Authors: Iyoda Masahiko , Sakaitani Masahiro , Miyazaki Tatsuya , Oda Masaji 
Published: July 2006

Abstract
The reactions of aryl-substituted 1,1-dibromoethenes with in situ generated tetrakis(triphenylphosphine)nickel(0) in the presence of tetraethylammonium iodide give aryl-substituted butatrienes.
Rh(I) CATALYZED CYCLOREVERSION OF TRISHOMOCUBANONES
Authors: Ogino Toshio , Awano Kazuyuki , Ogihara Tsutomu , Isogai Koji 
Published: July 2006

Abstract
Two types of trishomocubanones, pentacyclo[5.4.0.02,6.03,10.04,8]undecan-11-ones and pentacyclo[5.4.0.2,60.3,10O.5,8]undecan-9-ones are catalytically cycloreverted by [Rh(CO)2Cl]2 in different cleavage modes. The mechanism is discussed on the basis of a kinetic study.
VAPOR PHASE CARBONYLATION OF METHANOL WITH SOLID ACID CATALYSTS
Authors: Fujimoto Kaoru , Shikada Tsutomu , Omata Kohji , Tominaga Hiro-o 
Published: July 2006

Abstract
Vapor phase carbonylation of methanol was catalyzed by strong solid acids in the absence of halogen promoter under pressurized conditions. Methyl acetate, methyl formate and acetic acid were obtained as carbonylated product with dimethyl ether as main by product. Hydrocarbons were also formed at high temperature.
DIASTEREOFACE-DIFFERENTIATING ADDITION OF ORGANOMETALLICS TOWARD CHIRAL α-KETOENAMINES
Authors: Fujisawa Tamotsu , Watanabe Makoto , Sato Toshio 
Published: July 2006

Abstract
The diastereoface-differentiating reaction of Grignard reagents or organolithium reagents toward chiral cyclic α-ketoenamines, prepared from the corresponding cycloalkane-1,2-dione and optically active pyrrolidine derivatives, was found to give, after hydrolysis, (R)- or (S)-α-hydroxycycloalkanones, respectively, in high enantiomeric excess.
PREPARATION OF DURABLE MODIFIED RANEY NICKEL CATALYST (MRNi)
Authors: Tai Akira , Tsukioka Kazumasa , Ozaki Hiroshi , Harada Tadao , Izumi Yoshiharu 
Published: July 2006

Abstract
A new type of asymmetrically modified Raney nickel catalyst with high durability has been prepared by treating the Raney nickel modified with tartaric acid and NaBr with a small amount of amine. The resulting catalyst showed high enantioface-differentiating ability and hydrogenation activity even after repeated uses of ten times upon the hydrogenation of methyl acetoacetate to methyl 3-hydroxybutyrate.
MUTUAL OPTICAL RESOLUTION OF BIS-β-NAPHTHOL AND SULFOXIDES. ABSOLUTE CONFIGURATION AND CRYSTAL STRUCTURE OF A 1:1 MOLECULAR COMPLEX
Authors: Toda Fumio , Tanaka Koichi , Mak Thomas C W 
Published: July 2006

Abstract
X-Ray analysis of a 1:1 complex of (R)-(+)-bis-β-naphthol with (R)-(+)-methyl m-tolyl sulfoxide has established the absolute configuration and showed that the two molecular components are alternately linked by O–H···O hydrogen bonds to form infinite zigzag chains parallel to the a axis. The bis-β-naphthol molecule adopts a cisoid conformation with a torsion angle of −78,2(2)° about the C–C bond joining the aromatic rings.
SINGLE CRYSTALS OF TOTALLY SYNTHETIC AMPHIPHILES, DIALKYLDIMETHYLAMMONIUM BROMIDES
Authors: Okuyama Kenji , Soboi Yoshie , Hirabayashi Kiyoshi , Harada Akira , Kumano Atsushi , Kaziyama Tisato , Takayanagi Motowo , Kunitake Toyoki 
Published: July 2006

Abstract
It has been shown by optical microscopy and X-Ray diffraction method that dimethylammonium bromides having two long alkyl chains (n=16, 18) form single crystals. This finding is the first example of the formation of single crystals of totally synthetic amphiphiles. The unit cell dimensions of the crystals of these compounds were similar to one another.
HIGHLY SELECTIVE OXIDATION OF BENZYLIC ALCOHOLS WITH CETYLTRIMETHYLAMMONIUM PERMANGANATE
Authors: Rathore R , Bhushan Vidya , Chandrasekaran S 
Published: July 2006

Abstract
Cetyltrimethylammonium permanganate (CTAP) has been found to be a mild and highly selective reagent for the oxidation of benzylic alcohols to the corresponding aldehydes or ketones.
CRYSTAL STRUCTURE AND ELECTRICAL CONDUCTIVITY OF A NEW CONDUCTING BISDITHIOLATE COMPLEX Li0.5[Pt(mnt)2]·2H2O
Authors: Kobayashi Akiko , Sasaki Yukiyoshi , Kobayashi Hayao , Underhill Allan E , Ahmad Munir M 
Published: July 2006

Abstract
The X-ray crystal structure analysis of Li0.5[Pt(mnt)2]·2H2O (mnt= 1,2-dicyanovinylene-1,2-dithiolato, C4N2S22−) has revealed that the [Pt(mnt)2]0.5− anions are stacked face-to-face along the a-axis to form a fourfold platinum chain. In contrast to the regular chain in the metallic compound Li0.8[Pt(mnt)2]·2H2O, the fourfold structure can be regarded as a Peierls insulating structure. The room temperature conductivity is about 1 S cm−1.
ISOLATION AND STRUCTURES OF TWO NEW p-HYDROXYSTYRENE GLYCOSIDES, PTELATOSIDE-A AND PTELATOSIDE-B FROM BRACKEN, PTERIDIUM AQUILINUM VAR. LATIUSCULUM, AND SYNTHESIS OF PTELATOSIDE-A
Authors: Ojika Makoto , Wakamatsu Kazumasa , Niwa Haruki , Yamada Kiyoyuki , Hirono Iwao 
Published: July 2006

Abstract
Two new p-hydroxystyrene glycosides, ptelatoside-A and ptelatoside-B were isolated from the carcinogenic fraction of aqueous extracts of bracken, Pteridium aquilinum var. latiusculum, and their structures were established to be p-β-primeverosyloxystyrene and p-β-neohesperidosyloxystyrene, respectively by chemical and spectral means. A synthesis of ptelatoside-A was achieved.
HIGHLY EFFICIENT ASYMMETRIC SYNTHESIS OF (S)-2,2-DIMETHYL-1,3-DIOXOLANE-4-METHANOL FROM GLYCEROL
Authors: Mukaiyama Teruaki , Tanabe Yoo , Shimizu Makoto 
Published: July 2006

Abstract
(S)-2,2-Dimethyl-1,3-dioxolane-4-methanol was prepared from glycerol in high yield with high optical purity by simple procedure. The procedure involves acylation of cyclic tin(IV) alkoxide with an optical active acid chloride in the crucial step.
A NEW METHOD FOR SYNTHESIS OF RUTHENIUM(III) AND RUTHENIUM(II) COMPLEXES OF β-DIKETONES FROM “RUTHENIUM BLUE” SOLUTION
Authors: Endo Akira , Shimizu Kunio , Satô Gen P , Mukaida Masao 
Published: July 2006

Abstract
The blue solution obtained by reducing hydrated ruthenium(III) trichloride with ethanol is used as a convenient starting material in the synthesis of several tris(β-diketonato)ruthenium(III) and tris(β-diketonato)ruthenate(II) complexes. The Hammett constants of the substituents on the ligand serve as a helpful guide for choosing the operating conditions.
2-CHLORO-1,3-BUTADIENE AS AN EFFICIENT ENOPHILE IN THE DIELS–ALDER REACTION WITH ANTHRACENE-1,4,9,10-TETRAONE. A SIMPLE SYNTHESIS OF THE 4-DEMETHOXYANTHRACYCLINONE INTERMEDIATE
Authors: Kimura Yoshikazu , Suzuki Michiyo , Matsumoto Teruyo , Abe Rumiko , Terashima Shiro 
Published: July 2006

Abstract
Diels-Alder reaction of 2-chloro-1,3-butadiene with anthracene-1,4,9,10-tetraone was found to occur exclusively at the external(C2,3) double bond, giving the adduct in an excellent yield. The adduct was readily converted to the 4-demethoxyanthracyclinone intermediate, (±)-7-deoxy-4-demethoxydaunomycinone, by way of 5,12-dihydroxy-l,2,3,4-tetrahydronaphthacene-2,6,11-trione.
ION-EXCHANGE PROPERTIES OF COPRECIPITATED SILICA-TITANIA GEL FOR ALKALI METAL IONS
Authors: Kaneko Shoji , Tsukamoto Kazuyoshi 
Published: July 2006

Abstract
Silica-titania gel of mole ratio 3:1 prepared by a coprecipitation method was found to exhibit excellent cation-exchange abilities, which were enhanced by the pretreatment with HCl and the heat treatment at 200 °C, as compared with silica or titania gel. Separation of cesium from sodium in aqueous solution with the silica-titania gel was complete.
TOTAL SYNTHESIS OF (−)-SWAINSONINE, AN α-MANNOSIDASE INHIBITOR ISOLATED FROM SWAINSONA CANESCENS
Authors: Suami Tetsuo , Tadano Kin-ichi , Iimura Youichi 
Published: July 2006

Abstract
The alkaloidal toxin, (−)-swainsonine: (1S,2R,8R,8aR)-1,2,8-trihydroxyoctahydroindolizine has been synthesized stereoselectively starting from methyl 3-acetamido-2,4,6-tri-O-acetyl-3-deoxy-α-d-mannopyranoside in a 15 steps reaction.
REVERSIBLE PHOTODIMERIZATION OF WATER-SOLUBLE ANTHRACENES INCLUDED IN γ-CYCLODEXTRIN
Authors: Tamaki Takashi 
Published: July 2006

Abstract
Anthracene-1- or 2-sulfonic and 2-carboxylic acids were found to form one host-two guest inclusion complexes with γ-cyclodextrin in aqueous solutions. The complex formation greatly enhanced the photodimerization of these anthracenes.
CYCLIZATION OF E,E-HOMOFARNESIC ACID AND ITS RELATED COMPOUNDS
Authors: Saito Akira , Matsushita Hajime , Kaneko Hajime 
Published: July 2006

Abstract
Acid-catalyzed cyclization of homofarnesic acid was examined in detail. E,E- and Z,E-homofarnesic acid in dichloromethane cyclyzed by catalysis of boron trifluoride etherate at −20°C to afford trans-anti-trans and trans-syn-cis norambreinolide in 38% and 52% yield respectively. Cyclization mechanism was discussed.
(+)-ACETOXYODONTOSCHISMENOL, A NEW DOLABELLANE DITERPENOID FROM THE LIVERWORT ODONTOSCHISMA DENUDATUM
Authors: Matsuo Akihiko , Uohama Katsumi , Hayashi Shtûchi , Connolly Joseph D 
Published: July 2006

Abstract
A new dolabellane diterpenoid, (+)-acetoxyodontoschismenol, displaying antifungal properties, has been isolated from the liverwort Odontoschisma denudatum, and its structure, including the absolute configuration, has been determined as (1R,6R,11R,12S)-6-acetoxy-12-hydroxydolabella-3E,7E-diene on the basis of the chemical and spectroscopic evidence.
REACTION OF DIPHOSPHENES WITH ELEMENTAL SELENIUM. ISOLATION AND CHARACTERIZATION OF SELENADIPHOSPHIRANES AND DISELENOXOPHOSPHORANE
Authors: Yoshifuji Masaaki , Shibayama Katsuhiro , Inamoto Naoki 
Published: July 2006

Abstract
Sterically protected thermally stable 1,2,3-selenadiphosphirane and diselenoxophosphorane were isolated from the reaction of E-bis-(2,4,6-tri-t-butylphenyl) diphosphene with elemental selenium.
LIGHT-INDUCED FIXATION OF CARBON DIOXIDE WITH ZINC PORPHYRIN
Authors: Inoue Shohei , Nukui Masahiro , Kojima Fumitoshi 
Published: July 2006

Abstract
N-Methyltetraphenylporphinatozinc ethyl reacts with carbon dioxide in the presence of secondary amine or alcohol to form novel metalloporphyrins containing metal carbamate or carbonate group. Some of these reactions are accelerated remarkably upon irradiation with visible light.
OXIDATION OF AZULENE DERIVATIVES. AUTOXIDATION OF 4,6,8-TRIMETHYLAZULENE IN A POLAR APROTIC SOLVENT
Authors: Matsubara Yoshiharu , Takekuxma Shin-ichi , Yokoi Katsumi , Yamamoto Hiroshi , Nozoe Tetsuo 
Published: July 2006

Abstract
Autoxidation of 4,6,8-trimethylazulene at 120 °C in N,N-dimethylformamide yielded twelve separable products (including four known compounds), which were assigned to be azulenoquinone, inden-1-one, and azulenyl-1-indanone derivatives. A comparison of the present results with those of guaiazulene was made to obtain a mechanistic aspect of the oxidation reaction.