bluuebunny/crossref_metadata_2025_split huggingface dataset:
CATALYTIC ACTIVITY OF IRON OXIDE TREATED WITH SULFATE ION FOR DEHYDRATION OF 2-PROPANOL AND ETHANOL AND POLYMERIZATION OF ISOBUTYL VINYL ETHER
Authors: Hino Makoto , Arata Kazushi 
Published: July 2006

Abstract
The catalytic activity of Fe2O3 for the title reactions was remarkably enhanced by exposing Fe(OH)3 or Fe2O3 prior to the crystallization to 0.1–1 N H2SO4 or (NH4)2so4 and then calcining in air at 500°C, its activity for the dehydration of ethanol being much higher than that of SiO2–Al2O3.
ONE STEP FORMATION OF ALKYNES FROM ARYL KETONES
Authors: Tsuji Takashi , Watanabe Yutaka , Mukaiyama Teruaki 
Published: July 2006

Abstract
Aryl ketones are converted to the corresponding alkynes by the treatment with 2-chloro-3-ethylbenzoxazolium tetrafluoroborate in the presence of a large excess of triethylamine at room temperature.
OPTIMUM COMPOSITIONS OF Rh–Sn–γ–Al2O3 CATALYSTS FOR SIMULTANEOUS REDUCTION OF NITRIC OXIDE AND CARBON MONOXIDE
Authors: Masai Mitsuo , Nakahara Keisuke , Yabashi Masakazu 
Published: July 2006

Abstract
The simultaneous reduction of NO and CO on Rh–Sn–γ–Al2O3 was studied in reductive and oxidative atmosphere. The effect of alloying with Sn on catalytic activity was obviously observed in oxidative atmosphere. The reaction temperature lowered in the presence of O2. The optimum Rh/Sn atomic ratio decreased with increasing concentration of O2 in the reactant.
THE CATALYTIC ACTIVITIES OF METHANOL REFORMING CATALYSTS AND THEIR PREPARATIONS
Authors: Minochi Chiaki , Kobayashi Haruo , Takezawa Nobutsune 
Published: July 2006

Abstract
Methanol reforming reaction CH3OH + H2O = CO2 + 3H2 was carried out over copper-containing catalysts which were prepared from hydroxides of copper and from the hydroxide kneaded with silica. From differential thermal analysis, infrared and X-ray photoelectron spectra of the catalysts and other chemical analysis, it was concluded that the anionic group of their starting material readily exchanged with hydroxide ion in the hydroxide precipitate in the course of their preparation and greately influenced the reaction.
PHOTOOXYGENATION OF FLAVANONOL-RED AND UNUSUAL AUTOXIDATION OF PHOTOFLAVANONOL-RED
Authors: Shibata Kozo , Matsuo Kotaro , Ichikawa Nobutaka , Kubota Takashi 
Published: July 2006

Abstract
Photooxygenation of flavanonol-red gave photoflavanonol-red by oxidative cleavage of C–C double bond in good yield. In alkaline solution, the autoxidation of photoflavanonol-red afforded 3,4,7,8-dibenzonaphthyrone by unusual oxidative cleavage of C–C double bond.
α-HYDROXYBENZYL ANION EQUIVALENT: A CONVENIENT METHOD FOR THE SYNTHESIS OF α-HYDROXY KETONES UTILIZING α-TRIMETHYLSILYLOXYBENZYLPHOSPHONATE
Authors: Hata Tsujiaki , Hashizume Akio , Nakajima Masashi , Sekine Mitsuo 
Published: July 2006

Abstract
Diethyl α-trimethylsilyloxybenzylphosphonate was treated with lithium diisopropylamide in THF followed by acyl chloride or acyl anhydrides to give the acylated products in good yields. The acylated products were converted easily by mild alkaline treatment to acyloins predominantly along with α-diketones.
A CONVENIENT METHOD FOR THE PREPARATION OF PHOSPHORIC DIESTERS AND ITS APPLICATION TO THE SYNTHESIS OF PHOSPHOLIPIDS
Authors: Mukaiyama Teruaki , Morito Naoya , Watanabe Yutaka 
Published: July 2006

Abstract
Treatment of 2-alkyloxybenzoxazoles with bis(p-nitrophenyl) hydrogen phosphate resulted in the formation of alkyl bis(p-nitrophenyl) phosphates. The phosphates were then converted by the application of various alcohols in the presence of cesium fluoride to dialkyl p-nitrophenyl phosphates, which, on treatment with alkali, gave dialkyl hydrogen phosphates in good overall yields. These sequential reactions were successfully applied to a synthesis of several phospholipids.
CHARGE TRANSFER INTERACTION IN [3.3]METACYCLOPHANE QUINHYDRONE
Authors: Shinmyozu Teruo , Inazu Takahiko , Yoshino Tamotsu 
Published: July 2006

Abstract
syn-[3.3]Metacyclophane quinhydrone 1 was synthesized by oxidation of bisphenol 6 with thallium trifluoroacetate, followed by catalytic hydrogenation. The quinhydrone 1 showed a characteristic broad CT absorption in the region of 350–600 nm with a maximum at 446 nm (ε2510) in dioxane.
THE EFFECTS OF SUPPORTS ON THE REACTION OF NO WITH NH3 CATALYZED BY V2O5
Authors: Ueno Akifumi , Todo Naoyuki , Kurita Minoru , Hagiwara Hiroyuki , Nishijima Akio , Sato Toshio , Kiyozumi Yoshimichi 
Published: July 2006

Abstract
The reaction mechanism of the catalytic reduction of NO by NH3 was studied using V2O5–Al2O3 and V2O5–SiO2 catalysts. On V2O5–Al2O3the reaction rate was enhanced by the presence of oxygen and the reaction was found to proceed through the formation of NO2 adsorbed on the catalyst surface. While on V2O5–SiO2 no effects of oxygen were observed and the reaction seems to proceed through the formation of HNO adsorbed on the catalyst, since N2O, which may be produced by the decomposition of HNO adsorbed, was detected during the reaction.
A KINETIC STUDY OF THE REACTION OF THE 5,5,7R(S),12,12,14R(S)-HEXAMETHYL-1S(R),4S(R),8S(R),11S(R)-TETRAAZACYCLOTETRADECANENICKEL(II) ION AND DIMETHYLSULFOXIDE INVOLVING A SINGLET-TRIPLET SPIN-STATE EQUILIBRIUM
Authors: Masuda Yukiyasu , Endo né , Ito Tasuku , Yoshida Noboru , Fujimoto Masatoshi 
Published: July 2006

Abstract
A kinetic study on the spin-state equilibrium in dimethylsulfoxide-water media, [NiL]2+ (singlet, square planar) + 2 DMSO \ightleftharpoons [NiL(dmso)2]2+ (triplet, pseudo Oh), is carried out with a temperature-jump method, where L denotes the title ligand (here-after abbreviated as α-rac-Me6[14]aneN4). The results are consistent with a two-step mechanism involving a rate-determining step [NiL(dmso)]2+ \ightleftharpoons [NiL]2+ + DMSO via formation of a 5-coordinated intermediate [NiL(dmso)]2+.
THE PREPARATION OF NEW[2.2]METACYCLOPHANEQUINONES
Authors: Tashiro Masashi , Yamato Takehiko 
Published: July 2006

Abstract
The convenient preparative method of anti-[2.2]metacyclophanequinone (4) and 5-t-butyl-8-methoxy[2](2,6)-p-benzoquinono[2]metacyclophane (5) is described.
THE EFFECT OF EXTERNAL MAGNETIC FIELD ON THE PHOTOCHEMICAL REACTION OF ISOQUINOLINE N-OXIDE IN VARIOUS ALCOHOLS
Authors: Hata Norisuke , Ono Yumiko , Nakagawa Fumiaki 
Published: July 2006

Abstract
The external magnetic field effect on the photochemical reaction of isoquinoline N-oxide was studied in methanol, 2-propanol or tert-butyl alcohol. Consequently, the yield of lactam was found to show a minimum at higher fields with a decrease in the pKa value of alcohol used as a solvent, supporting the previously proposed mechanism of the photochemical magnetic field effect.
HEXADIENE FORMATION FROM 2-PROPANOL OVER CALCIUM PHOSPHATE CATALYST
Authors: Sodesawa Toshiaki , Nakajima Hirotaka , Nozaki Fumio 
Published: July 2006

Abstract
Hexadiene formation from 2-propanol over calcium phosphate catalyst was observed and studied from the standpoint of acid-base catalysis. Maximum conversion to hexadiene was obtained at 425°C. The hexadiene formation was suppressed remarkably by the addition of phenol, while its formation was not so much controlled by the pyridine addition.
PHOTOUREIDOMETHYLATION OF 9-CYANOPHENANTHRENE WITH TETRAMETHYLUREA INVOLVING THE CHARGE-TRANSFER PROCESS IN THE EXCITED TRIPLET STATE
Authors: Tsujimoto Yuji , Hayashi Mitsunori , Miyamoto Takuji , Odaira Yoshinobu , Shirota Yasuhiko 
Published: July 2006

Abstract
Irradiation of an acetonitrile solution of a mixture of 9-cyanophenanthrene and tetramethylurea gave an ureidomethylated product in a high yield, the reaction being regioselective and solvent-dependent. It is indicated that the reaction involves the charge-transfer process in the excited triplet state of 9-cyanophenanthrene.
PHOTOREDUCTION AND REDOX CATALYSIS OF AN AMPHIPATHIC DERIVATIVE OF TRIS (2,2′-BIPYRIDINE)RUTHENIUM(II) AT THE MICELLAR SURFACE
Authors: Tsutsui Yasuhiro , Takuma Keisuke , Nishijima Toyoki , Matsuo Taku 
Published: July 2006

Abstract
On the flash photolysis of an amphipathic derivative of tris(2,2′-bipyridine)ruthenium(II), the highest yield for photoreduction of the complex by N,N′-dimethylaniline was obtained with the micellar solutions of a cationic surfactant (CTAC). The kinetic studies proved that catalytic reduction of various substrates smoothly proceeded via the reduced ruthenium complex at the micellar surface.
SYNTHESIS OF 16,16-(2-FLUOROTRIMETHYLENE)-PROSTAGLANDINS AND 16,16-(2,2-DIFLUOROTRIMETHYLENE)-PROSTAGLANDINS
Authors: Nakai Hisao , Hamanaka Nobuyuki , Kurono Masayasu 
Published: July 2006

Abstract
Synthesis of the new prostaglandin(PG) analogs, 16,16-(2-fluorotrimethylene)-PGE2 and -PGE1, 16,16-(2,2-difluorotrimethylene)-PGE2 and -PGE1 is reported. These new PG analogs have higher biological activities but lower side-effects than the natural PGs.
SYNTHESES OF (±)-WARBURGANAL AND (±)-ISOTADEONAL
Authors: Ohsuka Akio , Matsukawa Akira 
Published: July 2006

Abstract
Methyl (±)-9-epidrimenate was oxidized with selenium dioxide at C-12 to give an aldehyde ester. The aldehyde group was protected by formation of an acetal, and then the methoxycarbonyl group was transformed into a formyl group. Hydrolysis of the acetal group gave (±)-isotadeonal. Stereoselective oxidation of the enolate generated from (±)-isotadeonal monoacetal gave (±)-warburganal monoacetal, which was hydrolyzed to (±)-warburganal.
31P NMR STUDIES ON THE MECHANISM OF ASYMMETRIC HYDROGENATION CATALYZED BY RHODIUM(I) COMPLEXES WITH CHIRAL PYRROLIDINODIPHOSPHINE LIGAND. EVIDENCE FOR EXTREMELY REGIOSELECTIVE COMPLEXATION OF PROCHIRAL SUBSTRATES
Authors: Ojima Iwao , Kogure Tetsuo 
Published: July 2006

Abstract
31P {1H} NMR studies on the key intermediate complex of asymmetric hydrogenation, [(L*–L)Rh(S–S′)]+ClO4− (L*–L = pyrrolidinodiphosphine, BPPM and PPPM; S–S′ = itaconic acid and α-acetamidoacrylic acid), revealed that the mode of the bidentated complexation of the prochiral substrate is extremely regioselective and stereoselective. A possible mechanism for chiral recognition of enantiofaces is proposed.
GRAYATHOL A, A NEW DITERPENE FROM LEUCOTHOE GRAYANA MAX.
Authors: Furusaki Akio , Gasa Shinsei , Hamanaka Nobuyuki , Ikeda Ryuzo , Matsumoto Takeshi 
Published: July 2006

Abstract
The structure of a new diterpene, grayathol A, has been shown to have a stereoisomeric grayanane skeleton by X-ray analysis.
SYNTHESIS AND LUMINESCENCE SPECTRA OF THE COBALT(II) COMPLEX WITH KOJATE
Authors: Muto Masayuki , Yokota Satoru , Yamamoto Yusuke , Nakahara Masayoshi , Mori Wasuke 
Published: July 2006

Abstract
A new complex, Co(koj)2·H2O (Hkoj: kojic acid), was synthesized, and its IR spectrum indicated that kojates in it are coordinated to cobalt as bidentate ligands. When the complex was excited with ultraviolet light, it exhibited luminescence spectra having maxima at about 20000 cm−1 in aqueous and acidic solutions, and even in the solid state.
STRUCTURES OF THREE NEW ENT-LONGIPINANE TYPE SESQUITERPENOIDS FROM THE LIVERWORT MARSUPELLA EMARGINATA SUBSP. TUBULOSA
Authors: Matsuo Akihiko , Uto Seiryû , Sakuda Keisuke , Uchio Yasuto , Nakayama Mitsuru , Hayashi Shûichi 
Published: July 2006

Abstract
Three new sesquiterpenoids were isolated from the liverwort Marsupella emarginata subsp. tubulosa. The structures and absolute configurations of the compounds have been shown to be (−)-marsupellone(1), (+)-marsupellol(2) and (+)-acetoxymarsupellone(3), containing an ent-longipinane skeleton, on the basis of chemical and spectral evidence.
PHOTO-INDUCED CYCLODIMERIZATION OF ELECTRON-RICH AROMATIC OLEFINS IN THE PRESENCE OF TRANSITION METAL COMPLEXES
Authors: Mizuno Kazuhiko , Ogawa Jun , Kamura Masafumi , Otsuji Yoshio 
Published: July 2006

Abstract
Irradiation of an acetonitrile solution of phenyl vinyl ether in the presence of various metal complexes[Fe(III) and Mn(II) complexes] gave two cyclodimers. Similar irradiation of 1,1-dimethylindene and 1,1-diphenylethylene afforded the corresponding cyclodimers. In these photodimerization, the metal complexes with ligands such as 2,2′-bipyridine and 1,10-phenanthroline served as catalysts for electron-transfer reaction.
DECOMPOSITION OF POLYCHLORINATED BIPHENYLS (PCB’s) IN A RADIO-FREQUENCY GLOW DISCHARGE PLASMA
Authors: Hiraoka Kenzo , Mitsumori Ken-ichi , Mochizuki Shuji 
Published: July 2006

Abstract
A study was made on the decomposition of PCB’s in a radio-frequency glow discharge plasma. When PCB’s were decomposed in a plasma of oxygen at a few Torr, they were completely decomposed to gaseous products: carbon monoxide, carbon dioxide, water, hydrogen chloride, chlorine, and chlorine dioxide. Hazardous compounds such as phosgene and vinyl chloride were not detected by a GC-MS analysis.
CIRCULAR DICHROISM AND 13C-NMR SPECTRA OF SIX MEMBERED PLATINUM(II) CHELATES CONTAINING OPTICALLY ACTIVE DIAMINES
Authors: Noji Masahide , Okamoto Koji , Kidani Yoshinori 
Published: July 2006

Abstract
The conformations of [Pt(NH3)2(R,R-dppn)]Cl2 and [Pt(NH3)2(R,S-dppn)]Cl2 (dppn=1,3-diphenyl-1,3-propanediamine) were decided to be chair forms on their 13C-NMR spectra. The additive law did not hold among the absolute CD strength of six membered Pt(II) chelates containing (S)-1,3-butanediamine, (S,S)-2,4-pentanediamine and R,R-dppn. In evaluating their absolute CD strength, the vicinal effect of methyl and phenyl groups should be taken into consideration, especially the latter group showed abnormally large increment.
SYNTHESIS AND PROPERTIES OF 1,2-BIS(TRIMETHYLSILYL)TRICYCLO[4.1.0.02,7]HEPT-4-EN-3-ONE. A NOVEL SUBSTITUTED TROPOVALENE
Authors: Sugihara Yoshikazu , Morokoshi Noritsugu , Murata Ichiro 
Published: July 2006

Abstract
1,2-Bis(trimethylsilyl)tricyclo[4.1.0.02,7]hept-4-en-3-one (3) has been synthesized from 4-acetoxy-2-cyclopenten-1-one and bis(trimethylsilyl)acetylene. Photochemical and transition metal promoted isomerizations of 3 are described.
ELECTROCHEMICAL PROPERTIES OF POLYTETRACYANOETHYLENE METAL CHELATE FILMS PREPARED ON METALS BY GAS PHASE REACTION
Authors: Hiratsuka Kazuya , Sasaki Hideo , Toshima Shinobu 
Published: July 2006

Abstract
Current-potential characteristics of iron, copper and nickel chelate films prepared by gas phase reaction of tetracyanoethylene with metals have been measured by cyclic voltammetry. The iron chelate film electrode showed a nearly reversible voltammogram for the reduction of iron(III) ethylenediaminetetraacetate and exhibited electrocatalytic activity for the oxygen reduction.
SEPARATION OF 2-METHYLPENTANE AND 2,2-DIMETHYLBUTANE BY MEANS OF SHAPE-SELECTIVE ADSORPTION INTO MODIFIED H-MORDENITE
Authors: Namba Seitaro , Yoshimura Atsushi , Yashima Tatsuaki 
Published: July 2006

Abstract
A competitive adsorption of 2-methylpentane and 2,2-dimethylbutane into various zeolites were carried out in a 1,3,5-trimethylbenzene solution at 273 K. Partially exchanged H-mordenite by Sr2+ or Ba2+ and a new type zeolite (H-ZSM-5) could adsorb only 2-methylpentane. We succeeded in the complete separation of 2-methylpentane and 2,2-dimethylbutane.
CYCLOPROPANATION OF ELECTRON-DEFICIENT OLEFINS WITH gem-DIBROMIDES CATALYZED BY NICKEL CATALYSTS
Authors: Kanai Hiroyoshi , Hiraki Nobuyuki 
Published: July 2006

Abstract
The cyclopropanation of electron-deficient olefins with gem-dibromides was catalyzed by nickel catalysts. The addition of Lewis acids or sodium iodide and zinc resulted in an increase of the yield.
PHOTO-INDUCED CYCLOADDITIONS OF EPOXYQUINONE TO ALDEHYDES AND KETONES
Authors: Maruyama Kazuhiro , Osuka Atsuhiro 
Published: July 2006

Abstract
Irradiation of a benzene solution of 2,3-dimethyl-2,3-epoxy-2,3-dihydro-1,4-naphthoquinone (1) and an aldehyde gave 1,3-dioxolanes 3 and 4 in high yields. Photolysis of 1 in a ketone gave 1,3-dioxolane 5.
STEREOSPECIFIC ENDO HYDROBORATION OF TRICYCLO[6.2.1.02,6]UNDEC-2(6)-ENE. AN EXAMPLE OF PRODUCT DEVELOPMENT CONTROL IN ADDITION REACTIONS OF BRIDGED POLYCYCLIC COMPOUNDS
Authors: Takaishi Naotake , Inamoto Yoshiaki , Aigami Koji 
Published: July 2006

Abstract
Hydroboration of the title olefin 1 took place under product development control to give exclusively the endo-2-exo-6 isomer 4x of tricyclo[6.2.1.02,6]undecan-exo-3-ol through the diborane attack on the endo side, which was considered to be more hindered on the basis of the formation of the exo-epoxide 8.
THE SYNTHESIS OF 4-ETHOXYINDENO[1,2-d]AZEPINE
Authors: Kimura Masaru , Satake Kyosuke , Morosawa Shiro 
Published: July 2006

Abstract
4-Ethoxyindeno[1,2-d]azepine (8) was prepared by O-ethylation of 4-hydroxyindeno[1,2-d]azepine (6ab) with Et3OBF4 in a 53% yield. 6ab was obtained by bromination of 4-oxo-1,2,3,4-tetrahydroindeno[1,2-d]azepine with NBS, and subsequent dehydrobromination of the corresponding bromo derivative formed in situ on basic alumina in a 10% yield. The NMR and electronic spectra of 8 indicated the presence of a fully conjugated 14-pi ring system in it.
STRUCTURE OF YOMOGIARTEMIN, A NOVEL SESQUITERPENE α-METHYLENE-γ-LACTONE FROM Artemisia feddei
Authors: Koreeda Masato , Matsueda Sumu , Satomi Takehiro , Hirotsu Ken , Clardy Jon 
Published: July 2006

Abstract
A novel diepoxy-guaianolide sesquiterpene α-methylene-γ-lactone, yomogiartemin 1, has been isolated from Artemisia feddei of the Compositae family. The structure was determined by both spectroscopic mehtods and x-ray analysis.
FREE RADICAL FORMATION IN THE MIXED POWDERS OF SACCHARIDES AND METALOXIDES
Authors: Kashiwagi Hiroshi , Yokoi Hideharu , Enomoto Saburo 
Published: July 2006

Abstract
Stable free radical formation was observed in the mixed powders of saccharides and metaloxides. The number of free radicals formed was found to be reduced with an increase in water contents in the powder. Free radicals disappered on kneading the mixtures with water, but they were stable when suspended in benzene. Very little free radical formation was observed in the binary systems containing glucose.
THE PREPARATION OF N1-ALKOXYCARBONYL-N2-(METHYLTHIO)THIOCARBONYLGUANIDINES VIA Δ4-l,2,4-THIADIAZOLINE DERIVATIVES
Authors: Fuchigami Toshio , Nonaka Tsutomu 
Published: July 2006

Abstract
The reaction of potassium methyl cyanoiminodithiocarbonate (1) with N-chlorocarbamates (2) gave 2-alkoxycarbonyl-3-imino-5-methylthio-Δ4-1,2,4-thiadiazolines (3). The reduction of (3) with hydrogen sulfide gave N1- alkoxycarbonyl-N2-(methylthio)thiocarbonylguanidines (4) quantitatively.
ENHANCING AND IMPROVING EFFECTS OF Sn ON Ru–Al2O3 CATALYST ON THE REDUCTION OF NO AND CO IN THE OXIDATIVE ATMOSPHERE
Authors: Masai Mitsuo , Yabashi Masakazu , Kobayashi Hideyo 
Published: July 2006

Abstract
The catalytic activity of Ru–γ–Al2O3 on simultaneous removal of NO and CO in oxidative atmosphere was enhanced by alloying with Sn. The degree of the enhancement was lesser than that observed on Rh–Sn–γ–Al2O3. The weight loss caused by the evaporation of toxic higher oxides of Ru from the catalyst was lowered by alloying with Sn.
ONE HOST-TWO GUESTS COMPLEXATION OF PHOTOSENSITIVE CAPPED CYCLODEXTRIN WITH AMINO ACIDS
Authors: Ueno Akihiko , Saka Rumiko , Osa Tetsuo 
Published: July 2006

Abstract
Azobenzene-capped β-cyclodextrin (I) forms complexes with amino acids according to 1:2 host/guest stoichiometry in which different molar ellipticities are assumed for 1:1 and 1:2 host/guest complexes. The result of the stoichiometry indicates that the guest molecule included first is bound to I much more strongly than the second one.
FACILE SYNTHESIS OF UNSUMMETRICAL SULFIDES USING BIS(2,2,2-TRIFLUOROETHOXY)TRIPHENYLPHOSPHORANE
Authors: Kubota Toshio , Miyashita Satoshi , Kitazume Tomoya , Ishikawa Nobuo 
Published: July 2006

Abstract
Bis (2,2,2-trifluoroethoxy)triphenylphosphorane (1) was found to behave as a potential reagent for the condensation of alcohols with thiols. Using this reagent, a variety of unsymmetrical sulfides were prepared under mild conditions.
31P NMR STUDIES ON THE CONFORMATIONS IN SOLUTION OF PYRROLIDINEPHOSPHINE–RHODIUM COMPLEXES, EFFECTIVE CATALYSTS FOR THE ASYMMETRIC HYDROGENATIONS
Authors: Achiwa Kazuo , Ohga Yoko , Iitaka Yoichi 
Published: July 2006

Abstract
FPPM–, BPPM– and PPPM–Rh+ (COD) complexes have the planar four cordinated structures, whereas PPM–Rh+(COD) complex has the trigonal bipyramidal five cordinated structure. Furthermore, the ratios between the rotational isomers of the complexes resulted from their N-substituent were clarified.
REGIO- AND STEREOCONTROLLED POLYPRENYLATION OF QUINONES. A NEW SYNTHETIC METHOD OF VITAMIN K SERIES
Authors: Naruta Yoshinori , Maruyama Kazuhiro 
Published: July 2006

Abstract
Polyprenyltrimethyltins were prepared in high yields by the coupling reaction of polyprenyl halides (geranyl, nenyl, farnesyl, and phytyl chloride) with trimethyltinlithium with retention of the stereochemistry at Δ2 position. In the presence of BF3·OEt2, coupling of the resulting polyprenyltin reagents with 2-methyl-1,4-naphthoquinone occurred to give vitamin K1 and K2 without any loss of their stereochemistry in the prenyl side chain.
AN EFFICIENT METHOD FOR THE SYNTHESIS OF MIXED DIESTERS OF PHOSPHORIC ACID
Authors: Mukaiyama Teruaki , Morito Naoya , Watanabe Yutaka 
Published: July 2006

Abstract
The reaction of 2-alkyloxybenzoxazoles with bis(p-nitrophenyl) hydrogen phosphate, and subsequent removal of one of two p-nitrophenoxy groups in the resulting alkyl bis(p-nitrophenyl) phosphate gave alkyl p-nitrophenyl phosphates. These were then converted to mixed dialkyl hydrogen phosphates in good overall yields by repetition of the above two-step procedure. The stepwise removal of two p-nitrophenoxy groups was successfully accomplished by the use of tetrabutylammonium acetate under very mild conditions.
PHOTO-INDUCED REARRANGEMENT OF WIDDROL HYPOIODITE
Authors: Takahashi Hajime , Ito Masaaki , Suginome Hiroshi , Masamune Tadashi 
Published: July 2006

Abstract
Hypoiodite of widdrol, a sesquiterpene, underwent a rearrangement to 5, 6,7,8-tetrahydro-2ξ-iodo-2ξ,4aβ,8,8-tetramethyl-8aα-vinylchroman on irradiation. Reflux in acetic acid containing sodium acetate transformed it into several compounds resulting from elimination of hydrogen iodide and reactions with generated iodine.
SYNTHESIS OF β-SILOXYALKYL PHENYL SELENIDES BY THE REACTION OF PHENYL TRIMETHYLSILYL SELENIDE WITH EPOXIDES
Authors: Miyoshi Noritaka , Kondo Kiyoshi , Murai Shinji , Sonoda Noboru 
Published: July 2006

Abstract
The reaction of phenyl trimethylsilyl selenide with epoxides using zinc iodide or n-butyllithium as a catalyst gave β-siloxyalkyl phenyl selenides in good yield.
LABORATORY STUDIES OF HETEROGENEOUS PHOTOCHEMICAL REACTION BETWEEN PROPYLENE AND NITROGEN DIOXIDE OVER ZINC OXIDE
Authors: Ibusuki Takashi 
Published: July 2006

Abstract
The photochemical reaction between C3H6 and NO2 in air over ZnO was investigated in order to elucidate the chemical influences of atmospheric particles on photochemical smog formation. A photocatalytic action of ZnO was demonstrated from the findings: HCN formation, a remarkable increase in C3H6 consumption and CO2 formation rates, and larger values of activation energies for formation of CO2 and CH3CHO than those obtained without ZnO.
A NOVEL OXIDATIVE RING EXPANSION REACTION OF 2-ALKYLIDENE-1,3-DITHIANES INTO 3-ALKYL-1,4-DITHIEPAN-2-ONES WITH Pb(OAc)4
Authors: Hiroi Kunio , Sato Shuko 
Published: July 2006

Abstract
The oxidative ring transformation reaction of 2-alkylidene-1,3-dithianes (1a–e) with Pb(OAc)4 produced 3-alkyl-1,4-dithiepan-2-ones (2a–e) in fairly good yields. The reaction of 2-benzylidene-1,3-dithiane (1f) with Pb(OAc)4 did not provide the corresponding ring expanded compound, instead giving 2-(α-acetoxybenzylidene) -1,3-dithiane (3) in 69% yield.
DIMERIZATION OF 1-CYCLOPROPYL-1,3-BUTADIENE CATALYZED BY NICKEL(0)-TRIPHENYLPHOSPHINE COMPLEX
Authors: Murakami Masashi , Nishida Shinya 
Published: July 2006

Abstract
Abstract: Oligomerization of 1-cyclopropyl-1,3-butadiene (1) was accomplished by the catalytic action of nickel(0)-triphenylphosphine. The incorporation of the cyclopropane ring was evident since the dimer 2 isolated in ca. 50% was 4-cyclopropyl-1,5,7,9-undecatetraene. The head-to-head type structure of 2 was proved by the use of 1-cyclopropyl-4,4-dideuterio-1,3-butadiene (1d).