bluuebunny/crossref_metadata_2025_split huggingface dataset:
A MACROCYCLIC ENZYME-MODEL SYSTEM, AN EVIDENCE FOR INCORPORATION OF A SUBSTRATE INTO A SIMPLE CYCLIC CAVITY
Authors: Murakami Yukito , Sunamoto Junzo , Kano Koji 
Published: July 2006

Abstract
The release of p-nitrophenol from p-nitrophenyl hexanoate (PNPH), decanoate (PNPD), and laurate (PNPL) in the presence of 10-hydroxy-11-hydroxyimino[20]paracyclophane (Oxime-I) or 2-hydroxycyclodecanone oxime (Oxime-II) has been investigated in alkaline aqueous acetone at 19.6°C and pH 12.1. For the decomposition of PNPL, the specificity constant (kr), defined as the ratio of the apparent first-order rate constant for the reaction of Oxime-I to that for the reaction of Oxime-II, sharply increased below 26.7 % of acetone-content, while the rate constant for the simple alkaline hydrolysis without added catalyst species decreased with the decrease of acetone concentration. The copper(II) ion largely inhibited the reaction of PNPL with Oxime-I to reduce the rate below the catalyst-absence level. These results manifest the incorporation of the substrate into the cyclic cavity of the catalyst. The presence of substrate specificity was also indicated for the reaction of Oxime-I with p-nitrophenyl carboxylates.
PYROLYSIS OF AROMATIC THIOLSULFONATES IN THE PRESENCE OF METALLIC COPPER
Authors: Fujisawa Tamotsu , Ohta Hiromichi , Sugimoto Kikuo 
Published: July 2006

Abstract
Aryl arenethiolsulfonates were pyrolyzed in the presence of metallic copper to give the corresponding diaryl sulfides. A complex between thiolsulfonates and the copper was suggested as an intermediate, on the basis of ir spectra.
STUDIES ON THE SWELLING OF Li-TAENIOLITE WITH WATER
Authors: Kitajima Kunio , Daimon Nobutoshi 
Published: July 2006

Abstract
Synthetic Li-taeniolite LiMg2Li(Si4O10)F2 reacts with water, and nearly free swelling occurs. Its X-ray diffraction spectra show that the interlayer spacing d (001) discontinuously expands with the increase of water content, and eight crystalline swelling steps are observed.
CYCLOADDITION REACTION OF HEXAFLUOROTHIOACETONE DIMER IN THE PRESENCE OF FLUORIDE ION
Authors: Kitazume Tomoya , Ishikawa Nobuo 
Published: July 2006

Abstract
2,2,4,4-Tetrakis(trifluoromethyl)-1,3-dithietane [1] in KF/DMF system reacted with dienes such as anthracene and styrene , and with monoenes such as cyclohexene and dimethyl maleate, to give corresponding cycloadducts of these alkenes with hexafluorothioacetone [2].
THE DETECTION AND IDENTIFICATION OF RADICALS PRODUCED IN THE REACTION OF N-CHLOROSUCCINIMIDE AND p-TOLUENESULFONIC ACID BY SPIN TRAPPING TECHNIQUE
Authors: Ko Munan , Sato Tsuneyuki , Otsu Takayuki 
Published: July 2006

Abstract
To detect and identify radical intermediates in the reaction of N-chlorosuccinimide (NCS) with p-toluenesulfonic acid (PTS), the spin trapping technique has been applied. From the reactions in the presence of some nitrones as spin trapping agent, the ESR spectrum of a nitroxide radical formed by addition of a N-succinimidyl radical to nitrone was observed.
EXTRINSIC COTTON EFFECTS ASSOCIATED WITH THE J- AND γ-BAND OF TRIPHENYLMETHANE DYES BOUND TO POLY-α,l-GLUTAMIC ACID
Authors: Yamaoka Kiwamu 
Published: July 2006

Abstract
Spectroscopically “metachromatic” crystal violet shows a characteristic γ-band and, by comparison, “normal” malachite green gives rise to a sharp J-band, when each dye is bound to poly-α,l-glutamic acid in helical conformation. These absorption bands are associated with induced Cotton effects of very high magnitude hitherto not observed for acridine dyes.
STUDY OF CHEMILUMINESCENCE BY MEANS OF CROSSED BEAMS: NITRIC OXIDE–HYDROGEN ATOM SYSTEM
Authors: Ibaraki Takamasa , Kusunoki Isao , Kodera Kumasaburo 
Published: July 2006

Abstract
NO-H chemiluminescence was studied by crossed molecular beams. Anomalously bright light emissions have been observed with low temperature NO beams. It is considered that the chemiluminescence is caused by the 1A″–1A′ transition of HNO formed by the two-body collisions between NO dimers and H atoms. The apparent activation energy and the radiation cross section are estimated to be about −2.8 kcal/mole, and about 2×10−18cm2 for 6000–8300 Å, respectively.
PRESSURE-INDUCED REVERSIBLE PHOTO-REACTION OF PYRENE IN ALCOHOL SOLUTIONS
Authors: Torihashi Yoshikazu , Itaya Akira , mataga Noboru 
Published: July 2006

Abstract
Irradiation of alcohol solutions of pyrene under high pressure led to the formation of photoproduct which shows absorption and fluorescence bands similar to those of 3-hydroxypyrene. The photoproduct disappeared and absorption bands of pyrene recovered completely when the pressure was removed.
DEPENDENCY OF “COMPRESSIBILITY OF MIXING UNIT” ON SHORT-RANGE INTERACTION IN VINYL ACETATE–METHYL ACRYLATE COPOLYMER SOLUTIONS
Authors: Ikeda Hiroaki , Fujita Masao , Shimura Tetsu , Masuda Yuzo 
Published: July 2006

Abstract
The dilute solution properties of vinyl acetate–methyl acrylate random copolymers are investigated by the viscometric two-parameter theories in the statistical thermodynamics of homopolymer solution at zero frequency and by the measurement of adiabatic compressibility at 1 MHz. The short-range interaction parameter and “compressibility of mixing unit” for the copolymer are examined in relation with those of the parent homopolymers.
It is found that the “compressibility of mixing unit” of polymer depends on the short-range interaction independently of the long-range interaction.
ACID AUTO-CATALYSIS OBSERVED ON THE PHOTO-INDUCED ALCOHOLYSIS OF PHENYLOXIRANE
Authors: Hisaoka Motoyuki , Tokumaru Katsumi 
Published: July 2006

Abstract
Possibility of participation of acid catalysis on the photo-induced alcoholysis of phenyloxirane under nitrogen was explored to show that the reaction is surely initiated by the irradiation but suffers auto-catalysis by a trace amount of acidic matter formed during the irradiation even with the use of freshly purified alcohol.
THE TRANSFORMATION OF NITRILES INTO AMIDES BY THE USE OF TiCl4
Authors: Mukaiyama Teruaki , Kamio Kunimasa , Kobayashi Susumu , Takei Hisashi 
Published: July 2006

Abstract
It was found that various carboxamides were prepared in good yields without accompanying the formation of acids by the hydrolysis of nitriles by using TiCl4 in acetic acid.
Studies on Preparations and Physical Properties of Multivalent Metal Condensed Phosphates VI. The Effect of Water Content on the Formation of Various Aluminum Phosphates
Authors: Tsuhako Mitsutomo , Hasegawa Kazuko , Matsuo Tsuneo , Motooka Itaru , Kobayashi Masamitsu 
Published: July 2006

Abstract
The effect of water content on the formation of various aluminum phosphates from Al, Al2O3 or Al(OH)3 and H3PO4 was studied. Al4(P4O12)3 is easily formed by the secondary heat treatment when the water content of the primary product is below 10 % or over 25 %, and two unknown substances H and K are formed when the water content is 10∼15 % and 15∼25 %, respectively.
X-RAY STRUCTURE DETERMINATION OF EREMOPHILENOLIDE
Authors: Kabuto Chizuko , Takada Naoko , Maeda Shuichi , Kitahara Yoshio 
Published: July 2006

Abstract
The structure of eremophilenolide is confirmed to be (1) by X-ray analysis. The cis-fused decalin system takes all chair “steroid-like conformation.”
REACTIONS OF ORGANOMETALLIC REAGENTS WITH SELENOXANTHYLIUM AND THIOXANTHYLIUM SALTS
Authors: Hori Mikio , Kataoka Tadashi , Shimizu Hiroshi , Hsü Chen-Fu 
Published: July 2006

Abstract
By the reaction of appropriate selenopyrylium salts with phenyllithium, novel aromatic heterocycles, so-called selenabenzenes, such as 10-phenyl-10-selenaänthracene (III-1) and 9,10-diphenyl-10-selenaänthracene (III-2), have been prepared. The mechanism of the reactions of phenyllithium and Grignard reagents with selenoxanthylium salts and with thioxanthylium salts was also proposed.
THE CHEMISTRY OF PHENALENIUM SYSTEM. XIII. SYNTHESIS AND PROPERTIES OF 4H-CYCLOPENTA[cd]PHENALEN-4-ONE
Authors: Murata Ichiro , Yamamoto Kagetoshi 
Published: July 2006

Abstract
The synthesis of the title compound 3 from benzo-4,5-indan-3-one 4 is described. Upfield chemical shifts of the protons attached to the phenalenone moiety of 3 relative to those of the dihydro derivative 9 are interpreted in terms of an induced paramagnetic ring current in the periphery of this molecule.
CYCLOADDITION REACTION OF METHYL COUMALATE WITH CYCLOHEPTATRIENE
Authors: Imagawa Takeshi , Sueda Noriyosi , Kawanisi Mituyosi 
Published: July 2006

Abstract
Thermal cycloaddition reaction of methyl coumalate (1a) with cycloheptatriene (2) afforded 6-methoxycarbonyl- and 2-methoxycarbonyltetracyclo [5.4.0.02,4.03,8]undeca-5,10-diene, (6a) and (7a). Similar reaction of methyl isodehydroacetate (1a) with 2 gave only 1,3-dimethyl-2-methoxycarbonyl derivative (7c).
ANOMALOUS BEHAVIORS IN SODIUM-CHLORANIL ION RADICAL SALT AROUND 110°C
Authors: Tsuda Motoyuki , Sakai Nobuko , Shirotani Ichimin , Murano Kentaro 
Published: July 2006

Abstract
The electronic spectrum and the electrical conductivity of Na+(CA)− abruptly change around 110°C. The X-ray studies show that the crystalline nature of the salt changes around this temperature. The results of the DSC measurement and the vibrational spectrum suggest that the above anomaly may be induced by release of water in the salt.
COPPER TETRACARBONYL CATION BY DIRECT CARBONYLATION OF CUPROUS ION
Authors: Matsushima Yoshihisa , Koyano Takashi , Kitamura Tetsuo , Wada Shozo 
Published: July 2006

Abstract
Carbon monoxide was absorbed by cuprous ion up to CO(absorbed)/Cu(I) ratio of 4 in BF3-water systems under atmospheric pressure. Infrared spectra of the solutions revealed an interaction between Cu+ and CO, indicating formation of Cu(CO)4+.
VINYL POLYMERIZATION. 302. POLYMERIZATION OF METHYL METHACRYLATE WITHOUT SHAKING WITH THE SYSTEM OF STARCH, WATER AND CARBON TETRACHLORIDE
Authors: Imoto Minoru , Ree Keiu , Ouchi Tatsuro 
Published: July 2006

Abstract
Polymerization of methyl methacrylate(MMA) initiated with aquous starch solution in the presence of carbon tetrachloride was carried out on standing. The rate of polymerization and the molecular weight of the polymer obtained were faster and higher than those under shaking. It was found that the polymerization initiated and proceeded in the water layer. The rate of polymerization (Rp) was concluded to be expressed by the equation: Rp = const. [starch]1.0.
ON THE INERTNESS OF SYN-TRICYCLO[4.2.0.02,5]OCTA-3,7-DIENE UNDER PHOTOLYTIC CONDITIONS. AN APPARENT VIOLATION OF THE ORBITAL SYMMETRY RULE
Authors: Iwamura Hiizu , Morio Kazuhiko , Kihara Hiroshi 
Published: July 2006

Abstract
An MO explanation is given to the failure of the intramolecular photocycloaddition reaction of syn-tricyclo[4.2.0.02,5]octa-3,7-diene. Due to the presence of the high-lying σ-orbitals of the cyclobutane ring and to the unique topology of the molecule, the electronic excitation could not be related to the ethylenic chromophore and/or a possible degenerate isomerization might be induced by photoexcitation.
FURTHER INVESTIGATION OF THE DISTRIBUTION OF ATOMIC COBALT IN THE FLAME
Authors: Fujiwara Kitao , Haraguchi Hiroki , Fuwa Keiichiro 
Published: July 2006

Abstract
For measuring the exact distribution of metal atoms in the flame, HITACHI 207 atomic absorption spectrophotometer was modified to a single light path with a smaller diameter of the light beam. Using this improved spectrophotometer, the more detailed distribution of cobalt atoms in the air-acetylene flame was measured in terms of some cobalt(III) complexes.
THE PROTON MAGNETIC RESONANCE SPECTRUM OF ETHYLENIMINE
Authors: Nakanishi Hiroshi , Yamamoto Osamu 
Published: July 2006

Abstract
An NMR spectrum of completely dehydrated ethylenimine in liquid phase is found to show well resolved multiplets for the aziridine ring protons and the computer analysis is made to determine the NMR parameters. Temperature dependent NMR spectra show that the nitrogen inversion of ethylenimine does not occur at room temperature.
A CONVENIENT METHOD FOR THE PREPARATION OF VINYL SULFIDES FROM CARBONYL COMPOUNDS BY USING TiCl4
Authors: Mukaiyama Teruaki , Saigo Kazuhiko 
Published: July 2006

Abstract
Various ketones, such as deoxybenzoin, propiophenone, phenylacetone, benzylacetone, cyclohexanone and 2-methylcyclohexanone, and aldehyde such as 3-phenylpropionaldehyde were smoothly converted to the corresponding vinyl sulfides in good yields by the treatments with thiols in the presence of TiCl4.
ION-SELECTIVE ELECTRODES RESPONSIVE TO MALEIC AND PHTHALIC ACIDS
Authors: Ishibashi Nobuhiko , Jyo Akinori , Yonemitsu Morihisa 
Published: July 2006

Abstract
The electrode membranes responsive to maleic and phthalic acids were prepared by using the organic solvent solutions of the crystal violet salts of the corresponding organic anions. The responses of both the electrodes are linear down to 10−4 – 10−4.5 M, with an ideal Nernstian slope of 58 mV per activity decade at 20 °C.
GAS CHROMATOGRAPHIC BEHAVIOR OF PERHALOALKANES
Authors: Tominaga Takeshi , Iwata Ren , Makide Yoshihiro 
Published: July 2006

Abstract
The gaschromatographic behavior of perhaloalkanes containing one or two carbon atoms and different kinds of halogen atoms in a molecule was investigated. The logarithm of the specific retention volume was correlated well with the halogen composition, the boiling point, the estimated volume of molecule and the molar refractivity of these compounds.
CYCLIC VOLTAMMETRY AND ELECTRON PARAMAGNETIC RESONANCE SPECTRA OF P-IODONITROEENZENE ANION RADICAL IN METHYLISOBUTYLKETONE
Authors: Kitagawa Toyokichi 
Published: July 2006

Abstract
Electron paramagnetic resonance (EPR) spectra of p-iodonitrobenzene anion radical was obtained in methylisobutylketone (MIBK) using tetrabutylammonium perchlorate (TBAP) as a supporting electrolyte. The line broadening of EPR spectra of p-iodonitrobenzene anion radical is considered to be caused by the ion pair formation between supporting electrolyte cation and radical anion.
ABSOLUTE CONFIGURATIONS OF (+)-METHYL TODOMATUATE AND ITS NEW ANALOGUES, PSEUDOTSUGONAL AND AR-PSEUDOTSUGONAL, ISOLATED FROM DOUGLAS-FIR WOOD
Authors: Sakai Tsutomu , Hirose Yoshio 
Published: July 2006

Abstract
Two new sesquiterpene keto aldehydes, named pseudotsugonal and ar-pseudotsugonal, together with (+)-methyl todomatuate were isolated from the wood of Douglas fir (Pseudotsuga menziesii (Mirb.)Franco) grown in British Columbia. The absolute configurations of all these compounds have been established to possess the R,R configuration at the two asymmetric centers.
HYDROSILANE-RHODIUM(I) COMPLEX COMBINATIONS AS SILYLATING AGENTS OF ALCOHOLS
Authors: Ojima Iwao , Kogure Tetsuo , Nihonyanagi Mitsuru , Kono Hiromichi , Inaba Shinichi , Nagai Yoichiro 
Published: July 2006

Abstract
The dehydrogenative condensation of organosilicon hydrides with alcoholic substances catalyzed by rhodium (I) complex was found to furnish a convenient route for the preparation of silylated alcohols.
FORMATION OF INTERSTELLAR MOLECULES ON THE SURFACE OF GRAINS
Authors: Iguchi Tetsuo , Sakata Akira , Murakami Hitoshi , Nakagawa Naoya 
Published: July 2006

Abstract
Relative amounts of molecules formed by relaxation type reactions between radicals (atoms) and radicals (atoms) on the grain surfaces are calculated. The result can explain the formation mechanism of observed molecules. A prediction has been made on molecules such as methylamine which are expected to be detectable.
THE SYNTHESES OF BIS(ETHYLENEDIAMINE)-TETRAMETHYLENEDIAMINE AND -DODECAMETHYLENEDIAMINE COBALT(III) COMPLEXES
Authors: Ogino Hiroshi , Fujita Junnosuke 
Published: July 2006

Abstract
Dimethylsulfoxide(DMSO) was found to be useful solvent for synthesizing various novel complexes. The reactions between cis- or trans-[CoCl2(en)2]+ and tetramethylenediamine or dodecamethylenediamine in DMSO produce new complexes, [Co(en)2(tmd)]n3n+ (n = 1 and 2), [Co(en)2(tmdH)2]5+, [Co(en)2(don)]n3n+ (n = 1 or 2) and [Co(en)2(donH)(H2O)]4+, where en, tmd, don, tmdH+ and donH+ denote ethylenediamine, tetramethylenediamine, dodecamethylenediamine, mono-protonated tetramethylenediamine and mono-protonated dodecamethylenediamine, respectively.
EFFECT OF IRRADIATION TEMPERATURE ON THE DISTRIBUTION OF 32P-ACTIVITY IN NEUTRON IRRADIATED ADENOSINE TRIPHOSPHATE
Authors: Kitaoka Yoshinori , Kobayashi Mitsue , Okada Moritami 
Published: July 2006

Abstract
The radioactivity distribution in reactor-irradiated adenosine triphosphate changed with irradiation time (5∼60min). This was mainly due to differences in the irradiation temperature, which was estimated by melting points of carboxylic acids and amides.
THE SWELLING OF Ge-TAENIOLITE SERIES MICAS WITH WATER
Authors: Kitajima Kunio , Daimon Nobutoshi 
Published: July 2006

Abstract
Germanium substituted analogues of Na-taeniolite and Li-taeniolite, i.e., Na–Ge-taeniolite NaMg2Li(Ge4O10)F2 and Li–Ge-taeniolite Limg2Li (Ge4O10)F2 were found to be expanded by water. However, the hydration tendencies of these Ge-taeniolites were found to be somewhat weaker than those of the corresponding silicon substituted analogues.
ASYMMETRIC REDUCTION OF KETONES VIA HYDROSILYLATION CATALYZED BY A RHODIUM(I) COMPLEX WITH CHIRAL PHOSPHINE LIGANDS
Authors: Ojima Iwao , Kogure Tetsuo , Nagai Yoichiro 
Published: July 2006

Abstract
Asymmetric reduction of ketones has been achieved via catalytic hydrosilylation using rhodium(I) complex with an optically active phosphine ligand as a catalyst.
5-AMINO-1-β-d-RIBOFURANOSYL-4-IMIDAZOLECARBOXAMIDE BY ALKALINE DEGRADATION FROM INOSINE
Authors: Suzuki Yoshihisa 
Published: July 2006

Abstract
5-Amino-1-β-d-ribofuranosyl-4-imidazolecarboxamide has been obtained from inosine by means of degradation in aqueous alkali over 100°C.
STUDIES ON PREPARATIONS AND PHYSICAL PROPERTIES OF MULTIVALENT METAL CONDENSED PHOSPHATES. VII. THE EFFECT OF WATER CONTENT ON THE FORMATION OF THE TYPES A AND B OF Al4(P4O12)3
Authors: Tsuhako Mitsutomo , Hasegawa Kazuko , Matsuo Tsuneo , Motooka Itaru , Kobayashi Masamitsu 
Published: July 2006

Abstract
The effect of water content on the formation of the types A and B of Al4(P4O12)3 from Al, AL2O3 or Al(OH)3 and H3PO4 was studied. Upon heating at 500°C, a mixture of the types A and B of Al4(P4O12)3 is generally obtained. However, type A is the main product of the secondary heat treatment when the water content of the primary product is below 10 % or over 25 %, whereas type B is readily formed when the water content is 12∼18 %
REACTIONS OF METHINYLTRICOBALT ENNEACARBONYL WITH OLEPINS
Authors: Sakamoto Noritoshi , Kitamura Takanori , Joh Takashi 
Published: July 2006

Abstract
Alkyl or alkenyl substituted methinyltricobalt enneacarbonyls were formed in the reactions of methinyltricobalt enneacarbonyl with mono- or diolefins.
CONJUGATIVE EFFECT OF PYRIDAZINONE RING ON THE COPOLYMERIZABILITIES OF 3(2-SUBSTITUTED)6-METHYLPYRIDAZINONES WITH STYRENE
Authors: Matsubara Yoshio , Noguchi Munenori , Yoshihara Masakuni , Maeshima Toshihisa 
Published: July 2006

Abstract
Radical copolymerizations of several pyridazinones (I–VI) with styrene (M1) have been carried out. It has been found that plots of log 1⁄r1, against both νc=o and νc=c in the pyridazinone ring gave straight lines, indicating that the reactivity of the double bond in the ring might be affected by the ring conjugation which involves the carbonyl group.
DISPROPORTIONATION OF PROPYLENE ON A SUPPORTED MOLYBDENA-ALUMINA CATALYST WITH FLOW SYSTEM IN THE LIQUID PHASE
Authors: Ogata Eisuke , Kamiya Yoshio 
Published: July 2006

Abstract
The disproportionation of propylene with flow system in the gas phase and in the liquid phase has been investigated using a molybdena catalyst supported on alumina. Results show that the catalytic activity decreases rapidly in the gas phase as the reaction proceeds but preserves for longer time in the liquid phase. This should be due to the effect that the heavier materials produced by the side reaction dissolve in the liquefied olefins and are carried away from the catalyst surface.
SELECTIVITY IN THE CATALYTIC FORMATION OF ACETALDEHYDE, ETHYLENE AND ETHYL ETHER FROM ETHYL ALCOHOL OVER POLYNAPHTHOQUINONE CONTAINING FeCl3
Authors: Iwasawa Yasuhiro , Ogasawara Sadao , Onishi Takaharu , Tamaru Kenzi 
Published: July 2006

Abstract
The rate as well as the selectivity of ethyl alcohol decomposition to acetaldehyde, ethylene and ethyl ether was markedly dependent on the FeCl3 content in the polynaphthoquinone catalyst and the formation of ethylene and ether was considered to take place on the FeCl3 coordinated to the quinone group of the catalyst.
PHOTOCHROMISM OF DIMETHYLAMMONIUM MOLYEDATE
Authors: Yamase Toshihiro , Ikawa Tsuneo , Kokado Hiroshi , Inoue Eiichi 
Published: July 2006

Abstract
A new photochromic compound was found. Dimethylammonium molybdate (DMAM) represented by the ideal formula {(CH3)2NH2}2O·3MoO3·H2O colored remarkably to the reddish brown on exposure to UV and returned to the original white by thermal fading. DMAM exhibited photochromic phenomena in the solid state and the correlation between coloration and UV-induced ESR signals was found.
EVIDENCE FOR NITROGEN-INVERSION ISOMERISM OF PROLINE
Authors: Sugiyama Hiroshi , Shiraishi Hiroyuki , Seto Shuichi 
Published: July 2006

Abstract
The proton NMR chemical shifts of l-Phe-l-Pro and d-Phe-l-Pro can be explained by the proline stereoisomerism due to the nitrogen inversion.
THE BIOSYNTHESIS OF PROTOANEMONIN IN RANUNCULUS GLABER MAKINO
Authors: Suga Takayuki , Hirata Toshifumi 
Published: July 2006

Abstract
Sodium [2-14C]malonate and d-[U-14C]glucose were incorporated into protoanemonin (I) in Ranunculus glaber Makino in 0.60 and 0.09% yield respectively at the highest value. Its labeling pattern suggests that the lactone I is biosynthesized by the condensation of glycerate and malonate in a terrestrial part of the plant.
PHOTO-CYCLOADDITION OF 1,4-NAPHTHOQUINONE WITH 2-NORBORNENE—A NOVEL TYPE OF PHOTO-CYCLOADDITION
Authors: Maruyama Kazuhiro , Otsuki Tetsuo , Naruta Yoshinori 
Published: July 2006

Abstract
Photo-cycloaddition compound composed of two molecules of 1,4-naphthoquinone and one molecule of 2-norbornene was obtained in the photochemical reaction of 1,4-naphthoquinone with 2-norbornene. Structure of the photo-cycloaddition compound was determined as (4). This type of photo-cycloaddition compound involving the formation of six membered carbon ring has never been reported.
PHOTOREACTION OF 2,5-DIPHENYL-1,4-DITHIIN
Authors: Kobayashi Keiji , Ohi Tadao 
Published: July 2006

Abstract
Irradiation of an ethereal solution of 2,5-diphenyl-1,4-dithiin afforded two types of dimer without formation of the products resulting from intramolecular photocyclization. The photodimers were shown to be a cis, syn-half-closed dimer and an anti-cage dimer.
THE VISCOELASTIC CRYSTALLINE ABSORPTION OF POLYGLUTAMIC ACID ESTERS
Authors: Kuroishi Masayuki , Kajiyama Tisato , Takayanagi Motowo 
Published: July 2006

Abstract
The viscoelastic crystalline absorption has been observed for the solid poly-γ-methyl-d-glutamate and poly-γ-benzyl-l-glutamate cast from various solvents. The temperature range of crystalline absorption (180 to 210°C) corresponds to the temperature range in which the lattice spacing deviates from linear expansion and also, the average size of crystallite increases extremely with increasing temperature.
EXCHANGE OF π-VINYL ALCOHOL OF PLATINUM(II) COMPLEX WITH ACETALDEHYDE
Authors: Francis James , Tsutsui Minoru 
Published: July 2006

Abstract
Exchange reaction of π-vinyl alcohol group on acetylacetonatochloroplatinum(II) with C14 labeled acetaldehyde was observed. If the exchange proceeds by attack of free vinyl alcohol, the sluggish reaction is attributable to the very small amount of vinyl alcohol in equilibrium with acetaldehyde.
FORMATION OF CYCLODIETHERS FROM 6-METHYL-5-HEPTEN-2-OL AND CITRONELLOL IN THE PRESENCE OF BORON TRIFLUORIDE ETHERATE
Authors: Nagai Kimiko , Nakayama Mitsuru , Hayashi Shûichi 
Published: July 2006

Abstract
On treatment with boron trifluoride etherate at room temperature, 6-methyl-5-hepten-2-ol and citronellol dimerized to give dioxamonocyclic compounds in a good yield.