bluuebunny/crossref_metadata_2025_split huggingface dataset:
NEW 14-OXOFURANOEREMOPHILANES AND RELATED SESQUITERPENES FROM SYNEILESIS PALMATA (THUNB.) MAXIM.
Authors: Kuroda Chiaki , Murae Tatsushi , Tada Masahiro , Nagano Hajime , Takahashi Takeyoshi 
Published: July 2006

Abstract
The presence of four new sesquiterpenes, 3β-angeloyloxy-6β-(3-methylbutanoyloxy)-14-oxofuranoeremophilane (1a), 3β,6β-bis(angeloyloxy)-14-oxofuranoeremophilane (1a), 3β-angeloyloxy-6β-(3-methylpentanoyloxy)furanoeremophilan-14-oic acid (2a), and 3β-angeloyloxy-6β-(3-methylbutanoyloxy)furanoeremophilan-14-oic acid (2b) in Syneilesis palmata (THUNB.) MAXIM, is described.
A NOVEL SYNTHESIS OF 1-AMINO-4-BUTYLAMINOANTHRAQUINONE FROM 1-AMINOANTHRAQUINONE PROMOTED BY METAL IONS
Authors: Yoshida Katsuhira , Matsuoka Masaru , Yamashita Yoshio , Kitao Teijiro 
Published: July 2006

Abstract
In the presence of cobalt salts, 1-amino-4-butylaminoanthraquinone was conveniently synthesized from 1-aminoanthraquinone and butylamine in a good yield under mild condition. Some of other metal ions were found to be effective on this amination. The yield was affected by both of the anion component of metal salt and the kind of solvent.
DETERMINATION OF PROTONATION SITE IN 1,N6-ETHENOADENOSINE RESIDUE IN AQUEOUS SOLUTION
Authors: Kuramochi Takao , Inoue Yasuo 
Published: July 2006

Abstract
We have prepared hitherto unknown quaternized derivatives of εAdo1, i.e., m1εAdo+ and m9εAdo+. These are the nontautomerizable model compounds for two possible forms of protonated εAdo, H1εAdo+ and H9εAdo+, respectively. A rough estimate of the [H1εAdo+]/[H9εAdo+] ratio is obtained by comparing the ultraviolet absorption spectra of protonated eAdo and the two nontautomerizable reference compounds. The results of this study will be valuable to resolve literature differences with regard to the fluorescence nature of protonated εAdo.
FORMATION OF PHOSPHORUS YLIDE VIA 1,3-SILYL MIGRATION OF DIMETHYL TRIMETHYLSILYLMETHYLPHOSPHONATE. APPLICATION OF THE PHOSPHONATE TO A WITTIG REACTION
Authors: Sekiguchi Akira , Ando Wataru 
Published: July 2006

Abstract
The reactions of carbonyl compounds with dimethyl trimethylsilylmethylphosphonate gave terminal olefins, dimethyl methylphosphonate, methyl trimethylsilyl methylphosphonate, and dimethyl trimethylsilyl phosphate. Terminal olefins may be formed by a Wittig type reaction of carbonyl compounds with a phosphorus ylide produced via 1,3-silyl migration of dimethyl trimethylsilylmethylphosphonate.
RAMAN SPECTRA OF POLYACETYLENE AND HIGHLY CONDUCTING IODINE-DOPED POLYACETYLENE
Authors: Harada Issei , Tasumi Mitsuo , Shirakawa Hideki , Ikeda Sakuji 
Published: July 2006

Abstract
The Raman spectra of conductive polyacetylene-iodine complexes and their parent polymers have been studied. The trans-rich polyacetylene film contains trans segments of various lengths while the cis-rich polyacetylene film is composed of relatively long cis sequences. The doped iodine takes either the form of (I3−)x or I5−.
(+)-11-DEOXY-13,14-DIHYDRO-13β,11α-EPOXYMETHANO-12-ISOPROSTAGLANDIN F2α FROM AUCUBIN
Authors: Naruto Masanobu , Ohno Kiyotaka , Naruse Norio , Takeuchi Hisashi 
Published: July 2006

Abstract
Synthesis of (+)-11-deoxy-13,14-dihydro-13β,11α-epoxymethano-12-isoprostaglandin F2α from aucubin 1 is described. An aldol-type condensation of cyclic acetal 3a with 2-acetoxy-1-heptene in the presence of TiCl4 is a key step of this synthesis.
REACTION OF ALKYL PHENYL KETONES IN SUPER ACID MEDIA. A CONVENIENT SYNTHESIS OF 4,4-DIALKYL-1-TETRALONE DERIVATIVES
Authors: Yoneda Norihikp , Takahashi Yukio , Suzuki Akira 
Published: July 2006

Abstract
Alkyl phenyl ketones having alkyl group of five or more C atoms are converted into 4,4-dialkyl-1-tetralones in sufficiently good yields via the initial protolysis of C–H bond in alkyl groups giving carbonium ion intermediates which in turn undergo ring closure in the presence of HF–SbF5 super acid media under mild conditions.
TAXILLUSIN, A NEW FLAVONOID GLYCOSIDE ISOLATED FROM TAXILLUS KAEMPFERI
Authors: Sakurai Atsushi , Okumura Yasuaki 
Published: July 2006

Abstract
A new flavonoid glycoside, taxillusin was isolated from Taxillus kaempferi and (2R,3R)-taxifolin-3-β-glucopyranoside-6″-gallate was assigned to this substance from studies on the hydrolysis products and from analyses of the pmr and carbon-13 nmr spectra.
SYNTHESIS OF 1,1′-BIPIPERIDINES BY THE DIRECT N,N-COUPLING OF PIPERIDINES
Authors: Nomura Yujiro , Ogawa Keiichiro , Takeuchi Yoshito , Tomoda Shuji 
Published: July 2006

Abstract
Oxidation of piperidines with aqueous alkaline solution of sodium peroxodisulfate in the presence of silver nitrate gave 1,1′-bipiperidines.
DIVERSITY IN THE BASE-INDUCED PHOTOREACTIONS OF 3-ACETYL-2,4-DIOXOTHIOLANE (3-ACETYLTHIOTETRONIC ACID)
Authors: Saito Kimitoshi , Sato Tadashi 
Published: July 2006

Abstract
Base-induced photolysis of 3-acetyl-2,4-dioxothiolane (3-acetylthiotetronic acid) undergoes (a) reductive ring cleavage or (b) two types of fragmentation with carbon-skeleton rearrangement, depending upon the irradiation conditions. Conceivable reaction schemes were presented.
FORMATION OF CARBAMATE DERIVATIVES BY REACTION OF CHLOROMETHYLOXIRANE OR PHENYLOXIRANE WITH CARBON DIOXIDE AND ALIPHATIC AMINES
Authors: Asano Takashi , Saito Norio , Ito Shota , Hatakeda Kiyotaka , Toda Takashi 
Published: July 2006

Abstract
Reactions of chloromethyloxirane or phenyloxirane with carbon dioxide and aliphatic amines in methanol afforded corresponding hydroxyoxazinone or hydroxycarbamate derivatives under mild conditions.
PHOTOELECTROCHEMICAL BEHAVIOR OF CHROMATOPHORES AT SOME NOBLE METAL ELECTRODES
Authors: Erabi Tatsuo , Hiura Hisahide , Hayashi Masayoshi , Yamada Masanobu , Endo Tomofumi , Yamashita Jinpei , Tanaka Masaya , Horio Takekazu 
Published: July 2006

Abstract
When the photosynthetic organs, chromatophores, were electrolyzed under light by using some noble metal electrodes, the observed photocurrent depended both on electrode potential and on the concentration of chromatophores. The photocurrent was enhanced by addition of PMS, Methoxy PMS or DCPI to the chromatophore suspension. The mechanism of the photocurrent is also discussed briefly.
ADDITION OF METHYLENE CHLORIDE TO 1-OLEFINS ASSISTED BY DICHLOROBIS(TRIPHENYLPHOSPHINE)NICKEL(II)
Authors: Inoue Yoshio , Ohno Sigeru , Hashimoto Harukichi 
Published: July 2006

Abstract
The reaction of methylene chloride with 1-olefins assisted by dichlorobis(triphenylphosphine)nickel(II) complex has been found to give 1:1 adducts in considerable yields.
THE PHOTOOXIDATION OF CYCLOHEPTATRIENES SENSITIZED BY α-DICARBONYL COMPOUNDS: AN OCCURRENCE OF DIOXYGENATION REACTION
Authors: Mori Akira , Takeshita Hitoshi 
Published: July 2006

Abstract
The photooxygenation of cycloheptatrienes, sensitized by α-dicarbonyl compounds, produced (6+2)π-, (4+2)π- and (2+2)π-cycloadducts with oxygen. Although the product distributions resembled closely to those of the genuine singlet-oxygen oxidation, it has suffered a quenching by 2,6-di-tert-butyl-p-cresol, indicating it to be a radical reaction.
SYNERGY IN THE OXIDATION OF AMMONIA WITH METAL OXIDE–Pt/Al2O3MECHANICAL MIXTURES
Authors: Miyamoto Akira , Kosaki Yukio , Murakami Yuichi 
Published: July 2006

Abstract
A new type of synergistic effect between a metal oxide and Pt/Al2O3 was observed in the oxidation of NH3; N2 was selectively produced with a metal oxide–Pt/Al2O3 mixture, whereas the metal oxide with its own oxidized NH3 to NO, NO2 and N2O as well as N2.
NEW SYNTHESIS OF (±)-PESTALOTIN AND (±)-EPIPESTALOTIN
Authors: Izawa Toshio , Mukaiyama Teruaki 
Published: July 2006

Abstract
A new synthesis for the preparation of (±)-pestalotin (1) and (±)-epipestalotin (1′) was successfully accomplished by utilizing the following two reactions : The partial reduction of 2-benzyloxyhexanoic acid (3) to 2-benzyloxyhexanal (6) via corresponding 3-acylthiazolidine-2-thione 5, and the TiCl4-promoted reaction of the aldehyde 6 with diketene.
A CONVENIENT METHOD FOR THE PREPARATION OF S,S-DIARYL PHOSPHORODITHIOATES
Authors: Hata Tsujiaki , Yamaguchi Kazuo , Honda Shinkichi , Nakagawa Iwao 
Published: July 2006

Abstract
N-Methylpyridinium dichlorophosphate formed from the reaction of methyl phosphorodichloridate with pyridine was treated with aromatic thiols in the presence of triethylamine to give the corresponding S,S-diaryl phosphorodithioates in good yields.
ANALYSIS OF MICROFIBRILLAR STRUCTURE OF COLLAGEN BASED ON α1(I) CHAIN SEQUENCE AND 7/1 HELIX MODEL OF TROPOCOLLAGEN
Authors: Okuyama Kenji , Go Nobuhiro , Takayanagi Motowo 
Published: July 2006

Abstract
Hydrophobic interactions between tropocollagens are analyzed by using the amino acid sequence in α1(I) chain and the 7/1 helix model of tropocollagen. It is concluded that tropocollagens aggregate to form a five-stranded microfibril. The D/11 periodicity of hydrophobic interactions is understood naturally by a pitch of a tropocollagen.
UNUSUAL MODE OF DIMERIZATION OF o-THIOQUINONE METHIDE. ISOLATION OF HEAD-TO-HEAD AND HEAD-TO-TAIL DIMERS
Authors: Okazaki Renji , Ishii Fumio , Sunagawa Kazuhiko , Inamoto Naoki 
Published: July 2006

Abstract
Reaction of o-thioquinone methide (1, R1=R2=CH3) with 2-dimethylamino-3-methyl-1-butene afforded a head-to-tail [4+4] dimer of 1 (2b, R1=R2=CH3). Photoreaction of naphtho [2,3-c] [1,2]dithiole-3-thione with cyclohexene is also described.
TANTALUM–CARBON BOND FORMATION IN THE THERMAL DECOMPOSITION OF TANTALUM DIETHYLAMIDE
Authors: Takahashi Yasutaka , Onoyama Nobuo , Ishikawa Yuichi , Motojima Seiji , Sugiyama Kohzo 
Published: July 2006

Abstract
In the thermal decomposition of pentakis(diethylamido)tantalum, a novel organometallic compound, ethylimino(C,N)tris(diethylamido)tantalum (1), is isolated, which reacts with methyl isocyanate affording the insertion product (4). On heating (1) above 100°C, it decomposes to ethylimido-complex (2) and ethylene. The rate of the reaction is first-order with respect to the complex (1). The activation parameters at 144°C are calculated as ΔH\eweq=26.2 kcal/mole and ΔS\eweq=−8.3 e.u.
PALLADIUM CATALYZED REACTION OF ALKYL 5-BROMO-2-FUROATE WITH ALLYLIC ALCOHOLS: A CONVENIENT SYNTHESIS OF 2-(3′-OXOALKYL)FURANS
Authors: Tamaru Yoshinao , Yamada Yoshimi , Yoshida Zen-ichi 
Published: July 2006

Abstract
Alkyl 5-bromo-2-furoate reacts with allylic alcohols in the presence of 1 mol% of palladium acetate to give 1-(5′-alkoxycarbonyl-2′-furyl)-3-oxoalkanes (3) selectively, together with small amounts of 1- (5′-alkoxycarbonyl-2′-furyl)-2-oxoalkanes (4). The reaction (regio-selectivity and reactivity) largely depends on the structure of allylic alcohols.
SUBSTITUENT EFFECTS ON THE RATIO OF [2,3]-SIGMATROPIC REARRANGEMENT vs syn-ELIMINATION OF ALLYLIC ARYL SULFOXIDES
Authors: Isobe Minoru , Iio Hideo , Kitamura Masato , Goto Toshio 
Published: July 2006

Abstract
Substituent effects on the ratio of [2,3]-sigmatropic rearrangement vs syn-elimination of allylic aryl sulfoxides were studied to reveal that an electron-donating substituent of the aryl group was efficient for the rearrangement in view of suppression of the elimination, a potentially significant side reaction. Electron-donating substituent on the vinyl group, however, seemed to have the reverse effect.
ISOASATONE A AND ISOASATONE B, TWO NOVEL NEOLIGNANS, FROM HETEROTROPA TAKAOI M.
Authors: Terada Yukimasa , Yamamura Shosuke 
Published: July 2006

Abstract
Two new neolignans, isoasatone A (3) and isoasatone B (4) have been isolated from the plant Heterotropa takaoi M., and their structures also been elucidated by comparing their spectral data with those of asatone (1).
MICELLAR CATALYSIS OF CN−-ASSISTED ISOALLOXAZINE(FLAVIN ANALOGUE) OXIDATION OF ALDEHYDES TO CARBOXYLIC ACIDS
Authors: Shinkai Seiji , Ide Toyoko , Manabe Osamu 
Published: July 2006

Abstract
Facile isoalloxazine oxidation of aldehydes to carboxylic acids was achieved in the presence of a cationic micelle and CN− ion. The formation of a carbanion intermediate was proposed on the basis of the kinetic examinations. The role of the cationic micelle and CN− ion was discussed.
THIONE S-IMIDE. REACTION WITH CARBON–CARBON DOUBLE BOND
Authors: Saito Takao , Motoki Shinichi 
Published: July 2006

Abstract
9-Fluorenethione S-p-toluenesulfonimide (I) reacted with 1,3-dienes on C=S bond of the imide to afford (2+4) cycloadducts, while with vinyl ethers the imide underwent a (3+2) type cycloaddition reaction to give isothiazolidines.
SYNTHESIS OF NUCLEOSIDES FROM 1-HYDROXYSUGARS USING 2-CHLOROBENZOXAZOLIUM SALT
Authors: Mukaiyama Teruaki , Shoda Shin-ichiro , Nakatsuka Takashi , Narasaka Koichi 
Published: July 2006

Abstract
A novel method for the preparation of trans nucleosides was developed by the use of 2-chloro-3-ethylbenzoxazolium tetrafluoroborate as a condensing reagent. Several trans nucleosides were prepared from 1-hydroxysugars and heterocycles in good yields under mild conditions.
AN ELECTRON SPIN RESONANCE STUDY OF NORBORN-5-EN-2-YL AND RELATED RADICALS
Authors: Sugiyama Yoshio , Kawamura Takashi , Yonezawa Teijiro 
Published: July 2006

Abstract
The homoallylic rearrangement of the norborn-5-en-2-yl radical to the 3-nortricyclyl radical is observed by esr. An analysis of esr spectra of norborn-5-en-2-yl, benzonorbornen-2-yl, and naphthonorbornen-2-yl radicals suggests that the homoconjugation involved in these radicals is not large.
DIELS-ALDER REACTIONS OF TRIMETHYLSILOXY-SUBSTITUTED BUTADIENES WITH DIMETHYL ACETYLENEDICARBOXYLATE
Authors: Yamamoto Keiji , Suzuki Shigeaki , Tsuji Jiro 
Published: July 2006

Abstract
A variety of trimethylsiloxy-substituted butadienes, including novel 1-methoxy-1,3-bis(trimethylsiloxy)butadiene, react in a Diels–Alder process with dimethyl acetylenedicarboxylate. The adducts were converted, via elimination or oxidative aromatization, into four corresponding dimethyl hydroxy-substituted phthalates in good to moderate yields.
CATALYTIC ACTIVITY OF THE LIQUID Na–Pb ALLOY SYSTEM
Authors: Honda Kazuaki , Takahashi Katsumi , Saito Yasuo , Ogino Yoshisada 
Published: July 2006

Abstract
The liquid Na–Pb alloy system has been found to catalyze the dehydrogenation of several alkylbenzenes, i.e. ethylbenzene, cumene, and p-cymene. It has also been found that the alloy catalyzes the dehydrogenation of tetralin. In every reactions, the selectivity has been found to be satisfactorily high.
NMR STUDY ON THE PROTONATION OF IMIDAZOLE RING OF N-ACETYL-l-HISTIDINE METHYLAMIDE, A MODEL FOR HISTIDINE RESIDUES EXPOSED TO AQUEOUS SOLVENT
Authors: Tanokura Masaru , Tasumi Mitsuo , Miyazawa Tatsuo 
Published: July 2006

Abstract
The pH titration curves of proton NMR chemical shifts were observed for N-acetyl-l-histidine methylamide and l-histidine in H2O and D2O. Macroscopic pKa and intrinsic chemical shifts for each ionic species were obtained. The enthalpy and entropy changes on protonation of the imidazole ring were determined. These data are useful for the discussions of microenvironments of histidine residues in proteins.
CRYSTALLINE-STATE RACEMIZATION BY X-RAY EXPOSURE IN COBALOXIME COMPLEXES
Authors: Ohashi Yuji , Sasada Yoshio , Ohgo Yoshiaki 
Published: July 2006

Abstract
A new example of the direct observation on the racemization of the α-cyanoethyl group by X-ray exposure is obtained with the crystal of S-α-cyanoethyl(S-α-methylbenzylamine)cobaloxime, the diastereoisomer of the previously reported compound [Ohashi and Sasada, Nature, 267, 142 (1977)]. The structure and the thermal behavior of the present crystal are similar to those of the crystal of its diastereoisomer. This fact confirms the previous proposal on the mechanism of the racemization.
A DIRECT METHOD FOR α-METHYLENEBUTYROLACTONE SYNTHESIS USING HOMOALLYL ALCOHOLS
Authors: Matsuda Isamu 
Published: July 2006

Abstract
3-Trimethylsily-3-buten-1-ols (1) are prepared by a ring opening of epoxides with α-trimethylsilvinylmagnesium bromide in the presence of catalytic amounts of CuI. 3-Bromo-3-buten-1-ols (2) derived from (1) react with Ni(CO)4 to give directly α-methylenebutyrolactones (4) with the assistance of potassium acetate in good yields except the case of a cyclopentanol derivative (2e).
[3.3]- AND [4.4]-TROPYRIOPARACYCLOPHANE TETRAFLUOROBORATES—INTRAMOLECULAR CHARGE–TRANSFER INTERACTION—
Authors: Horita Hisanori , Otsubo Tetsuo , Misumi Soichi 
Published: July 2006

Abstract
The title compounds were synthesized and their structures were confirmed by NMR spectra. The [3.3]cyclophane 2 shows significant charge-transfer bands in its electronic spectrum. The intramolecular CT interaction in three [n.n]tropylioparacyclophane homologues is compared.
ENHANCED REACTIVITIES OF “NAKED” METAL ION AND WATER AFFORDED IN REVERSED MICELLES
Authors: Sunamoto Junzo , Kondo Hiroki , Akimaru Kenji 
Published: July 2006

Abstract
Through the kinetic studies on the hydrolysis of norleucine p-nitrophenyl ester in the AOT/CCl4 reversed micelles cosolubilizing aqueous cupric nitrate, we observed evidence of the “naked” copper(II) ion which easily forms a complex with the substrate ester (log kf=8∼9) and “free” water molecule acting as an effective nucleophile on the labile complex (kH2O=0.2∼0.8 M−1 s−1).
HEATS OF SOLUTION OF CRYSTALLINE OPTICALLY ACTIVE AND RACEMIC AMINOACIDS IN WATER
Authors: Matsumoto Masayuki , Amaya Kazuo 
Published: July 2006

Abstract
The heats of solution of aminoacids crystals at 298.15 K have been measured. The difference between the heat of solution of optically active compounds and that of corresponding racemic compounds was appreciably large compared with the heat of mixing of concentrated aqueous solutions of d- and l-optical isomers, and the values were several kJ/mol at most.
CHEMISTRY OF ORGANOSILICON COMPOUNDS CXVI. FLUORIDE ION-PROMOTED ISOMERIZATION OF METHYL-SUBSTITUTED ALLYLSILANES. REGIOSELECTIVE SYNTHESES OF ALLYLSILANES
Authors: Hosomi Akira , Shirahata Akihiko , Sakurai Hideki 
Published: July 2006

Abstract
Fluoride ion-catalyzed isomerization of methyl-substituted allylsilanes is reported. In the reaction, a regioisomer of allylsilanes, in which the silicon atom binds to the less substituted carbon atom of the allylic group, is obtained. Accordingly, the reaction is useful as a new route to regioselective synthesis of allylsilanes.
NOVEL CYCLODIMERIZATION AND CYCLOTRIMERIZATION OF 3-HEXYNE BY CATIONIC NICKEL HYDRIDE COMPLEX
Authors: Inoue Yoshio , Itoh Yoshio , Hashimoto Harukichi 
Published: July 2006

Abstract
Cationic nickel hydride complex, [HNi(dpe)2]OCOCF3 (dpe=Ph2PCH2CH2PPh2, catalyzed the novel cyclodimerization and cyclotrimerization of 3-hexyne to afford 1,2,4-triethyl-3-ethylidenecyclobutene 1, pentaethyl-5-propenylcyclopentadiene 2, and pentaethyl-5-allylcyclopentadiene 3.
PHOTOCYCLIZATION IN 3-[ω-(ANILINO) ALKOXY] NITROBENZENES
Authors: Mutai Kiyoshi , Kanno Sei-ichiro , Kobayashi Keiji 
Published: July 2006

Abstract
Irradiation of solutions of 3-[ω-(anilino) alkoxy]nitrobenzenes, 3 (n=2 and 3), with 313 nm light gave cyclized products, 5, and 6. No intramolecular substitution at the meta C–O bond was observed. The methylamino analogs, 4, showed only degradation under the same conditions.
SPECIFIC SELECTIVITY OF A PARTLY REDUCED MoO3/β-TiO2 FOR HYDROGENATION OF n-BUTENE AND BUTADIENE
Authors: Tanaka Katsumi , Tanaka Ken-ichi , Miyahara Koshiro 
Published: July 2006

Abstract
The cis–trans isomerization reaction of but-2-ene was markedly enhanced by addition of hydrogen over a partly reduced MoO3/β-TiO2 catalyst, but the double bond migration reaction of but-1-ene to but-2-ene was not accelerated by hydrogen. As a result, the deuteration of butadiene on this catalyst yielded 3,4-d2-but-1-ene and 1,4-d2-but-2-ene in a ratio of 7 to 3 with little isomerization. Hydrogenation of a mixture of but-1-ene and but-2-ene brought about the selective hydrogenation of but-1-ene, while the intermediate for the hydrogenation of but-1-ene was deduced to be sec-butyl being common to but-2-ene.
PALLADIUM CATALYZED REACTION OF 4-BROMO-2,6-LUTIDINE WITH ALLYLIC ALCOHOLS
Authors: Tamaru Yoshinao , Yamada Yoshimi , Arimoto Tomoaki , Yoshida Zen-ichi 
Published: July 2006

Abstract
Palladium acetate catalyzed the reaction of 4-bromo-2,6-lutidine with allylic alcohols to give 4-(3′ -oxo-alkyl)-2,6-lutidines selectively together with small amounts of 4-(2′ -oxo-alkyl)-2,6-lutidines. Under the same conditions, 4-chloro- and 2-bromopyridines react to give 4,4′- and 2,2′-bipyridyls, respectively.
SYNTHESIS OF ORGANOBORANES VIA ORGANOALUMINUMS. A CONVENIENT ROUTE TO TRIALKENYLBORANES FROM NONCONJUGATED DIOLEFINS
Authors: Sato Fumie , Haga Shinobu , Sato Masao 
Published: July 2006

Abstract
Hydroalumiination of olefins followed by treatment with boron trifluoride etherate provides a convenient and selective method for the preparation of organoboranes.
Trialkenylboranes are obtained in excellent yields from nonconjugated diolefins.
TOTAL SYNTHESIS OF METHYNOLIDE
Authors: Inanaga Junji , Katsuki Tsutomu , Takimoto Seiji , Ouchida Shuichi , Inoue Kazutaka , Nakano Akio , Okukado Nobuhisa , Yamaguchi Masaru 
Published: July 2006

Abstract
(+)-Methynolide, the aglycon of a macrolide antibiotic, methymycin, was synthesized via its acetylenic analogue, 8,9-didehydromethynolide. The lactonization of the seco-acids was carried out by the newly developed mixed anhydride method using 2,4,6-trichlorobenzoyl chloride.
LOW-SPIN FIVE-COORDINATE Co(II) COMPLEXES OF A 14-MEMBERED MACROCYCLIC TETRAAMINE CONTAINING TWO DEPROTONATED AMIDES—A NEW REVERSIBLE OXYGEN CARRIER
Authors: Ishizu Kazuhiko , Hirai Junko , Kodama Mutsuo , Kimura Eiichi 
Published: July 2006

Abstract
A new 1:1 complex formed between Co(II) and doubly deprotonated 1,4,8,11-tetraazacyclotetradecane-5,7-dione exhibits an ESR spectrum typical of a low-spin square-planar Co(II) complex with the unpaired electron occupying dz2 orbital. Addition of excess imidazole or pyridine yields five-coordinate square-pyramid complexes, which reversibly bind to O2 at −70°C. The rigid planarity of the tetraamine macrocycle is compared with porphyrin chelates using ESR parameters.
STUDIES OF ELECTRODE SURFACE CHANGES IN SITU BY PHOTOACOUSTIC SPECTROSCOPY
Authors: Fujishima Akira , Masuda Hideki , Honda Kenichi 
Published: July 2006

Abstract
Photoacoustic spectroscopy (PAS) was used for the study of electrode-electrolyte interfaces in situ. The design of the PAS cell and the experimental procedure are given. The change in absorption at the interface during electrochemical reaction at Au electrodes, as measured by PAS technique, is described.
ACYLATION OF EPOXIDES BY THE USE OF ACYLTETRACARBONYLFERRATES: SYNTHESIS OF α,β-UNSATURATED KETONES
Authors: Yamashita Masakazu , Yamamura Shuichi , Kurimoto Masatada , Suemitsu Rikisaku 
Published: July 2006

Abstract
α,β-Unsaturated ketones were synthesized in high yields by the reaction of epoxides with acyltetracarbonylferrates.
IRON OXIDE AS AN EFFECTIVE CATALYST FOR THE POLYCONDENSATION OF BENZYL CHLORIDE, THE FORMATION OF PARA-SUBSTITUTED POLYBENZYL
Authors: Hino Makoto , Arata Kazushi 
Published: July 2006

Abstract
Iron oxides prepared by calcining iron hydroxides which were precipitated by hydrolyzing FeCl3 and Fe(NO3)3 with ammonia and iron nitrate at 300–500°C were highly effective for the title reaction at room temperature. The product was stable up to 400°C and predominantly para-substituted polybenzyl with 8175 of molecular weight.
RADICAL POLYMERIZATION OF METHYL METHACRYLATE INITIATED WITH POTASSIUM PERSULFATE IN THE PRESENCE OF NUCLEIC ACID BASE OR BENZO[a]PYRENE
Authors: Imoto Minoru , Kuriyama Akira , Ouchi Tatsuro 
Published: July 2006

Abstract
It was found that nucleic acid bases and nucleosides could retard the radical polymerization of methyl methacrylate(MMA) initiated with K2S2O8 in water. This chain transfer reaction may be the hydrogen abstraction from NH group or the addition of propagating chain radical onto C=C double bond. Also 5-fluorouracil, an antitumor drug, reacted effectively with propagating radicals to retard the polymerization. On the contrary, benzo[a]pyrene, which is known as a carcinogen, was found to promote strongly the radical polymerization of MMA in water.