bluuebunny/crossref_metadata_2025_split huggingface dataset:
NEW METAL HALIDE CATALYSTS FOR REDUCTION OP NITRIC OXIDE WITH AMMONIA
Authors: Todo Naoyuki , Nishijima Akio , Ueno Akifumi , Kurita Minoru , Hagiwara Hiroyuki , Sato Toshio , Kiyozumi Yoshimichi 
Published: July 2006

Abstract
The effect of counter anions on the catalytic activities of cupric and ferric ions, when salts of them are used as catalysts for the reduction of nitric oxide with ammonia, was investigated. The order of the co-catalyst activity of the counter anions investigated is Br−, Cl−, SO42−, and O2−.
THERMAL DECOMPOSITION OF VINYL AZIDES IN ACRYLIC ACID DERIVATIVES: SYNTHESIS OF 1-VINYLAZIRIDINES
Authors: Nomura Yujiro , Hatanaka Naoto , Takeuchi Yoshito 
Published: July 2006

Abstract
By the thermal decomposition of α- or β-azidostyrene and 2-azido-trans-2-butene in acrylonitrile or methyl acrylate were obtained 2-substituted 1-(1-phenylvinyl)aziridine, 1-trans-styrylaziridine, and 1-(1-methyl-cis-propenyl)aziridine, respectively, in good yields.
PHOTOCHEMICAL REACTION OF BIS-HALOGENODINITROSYLCOBALT(-I) WITH HEXACARBOMLCHROMIUM(O)
Authors: Schmidt Jörn , Rehder Dieter 
Published: July 2006

Abstract
Photo-induced ligand exchange between [Co(NO)2X]2 (X = Cl, Br, I) and [Cr(CO)6] dissolved in THF yields solutions which contain –according to e.s.r. spectra– [Cr(NO)X2(THF)n] species. Spin densities, coupling constants, and g values are discussed in the light of varying Cr/X interaction. E.s.r. measurements of the frozen solutions lead to the assumption that g values are anisotropic.
CARRIER PHOTOGENERATION INVOLVING TRIPLET–TRIPLET ANNIHILATION IN N-VINYLCARBAZOLE–1-VINYLNAPHTHALENE COPOLYMER
Authors: Yokoyama Masaaki , Hanabata Makoto , Tamamura Toshiaki , Nakano Takeshi , Mikawa Hiroshi 
Published: July 2006

Abstract
The carrier photogeneration mechanism has been investigated in N-vinylcarbazole(VCz)-1-vinylnaphthalene(VNa) copolymer. The photocurrent as well as the delayed fluorescence of carbazole chromophore due to the triplet–triplet (T–T) annihilation are found to be enhanced by introducing a few mole per cent of VNa units. The photocurrent shows a quadratic dependence upon the illumination light intensity in a high field. In the light of the emission study, the following carrier photogeneration involving T–T annihilation is found to occur in the VCz–VNa copolymer: (Remark: Graphics omitted.)Here, Cz and Na represent the carbazole and naphthalene chromophores, and the asterisk and double asterisk indicate the lowest and higher excited states, respectively.
THE REGIOSPECIFIC SYNTHESIS OF VICINALLY DIALKYLATED CYCLOPENTADIENES AND ITS APPLICATION TO A SYNTHESIS OF ALLETHROLONE
Authors: Fujisawa Tamotsu , Ohta Hiromichi , Kobori Takeo , Hata Kazumi , Sakai Kunikazu 
Published: July 2006

Abstract
A method for the selective introduction of two alkyl groups into the vicinal positions of cyclopentadiene was investigated by treating esters of cyclopentadienylethanols, prepared from sodium cyclopentadienide and epoxide, with a base, followed by reduction with lithium aluminum hydride. 2-(2-Methylcyclopentadienyl)ethanol thus obtained was transformed to allethrolone via several steps.
HIGH PERFORMANCE LIQUID CHROMATOGRAPHY OF COBALT(III) MIXED LIGAND COMPLEXES WITH ACETYLACETONATE AND OXINATE AND MONOMETHYLOXINATE IONS
Authors: Kidani Yoshinori , Naga Shinobu , Koike Hisashi 
Published: July 2006

Abstract
In the presence of Co(III) mixed ligand complexes with acetylacetonate, and oxinate and monomethyloxinate ions, the authors attempted to employ high performance liquid chromatography, HPLC, for the separation and purification of the mixed ligand complexes and the reverse phase mode was found to be appropriate. Optimal reaction conditions of the synthesis have been studied.
KINETIC STUDY ON THE FORMATION OF A BINUCLEAR COMPLEX BETWEEN COPPER(II) AND CYCLODEXTRIN
Authors: Mochida Kazuo , Matsui Yoshihisa 
Published: July 2006

Abstract
The formation of a 2:1 complex between copper(II) and α- or β-cyclodextrin was examined in an alkaline solution by means of a stopped-flow spectrophotometer. The reaction involves a first-order rate process corresponding to the cross-linking of a cyclodextrin ring by a Cu(OH−)2Cu or Cu(OH−)(O2−)Cu ion bridge.
A PMR STUDY ON THE FIXED CONFORMATION OF FUNCTIONALIZED (2,5)PYRIDINOPHANES
Authors: Iwata Masaaki , Kuzuhara Hiroyoshi , Emoto Sakae 
Published: July 2006

Abstract
The relationship of the hindered rotation with the ring size in phane derivatives of pyridoxine and pyridoxal was investigated with the aid of the appearance of an AB quartet signal in PMR spectra at ambient or elevated temperature, and it was found that phane derivatives with the ring size equal to or less than fourteen members could be optically resolved into enantiomers.
DONOR–ACCEPTOR TYPE CYCLOADDITION OF DISPIRO[2.2.2.2]DECA-4,9-DIENE WITH TETRACYANOQUINODIMETHANE
Authors: Tsuji Takashi , Hienuki Yutaka , Nishida Shinya 
Published: July 2006

Abstract
Dispiro[2.2.2.2]deca-4,9-diene undergoes the cycloaddition with tetracyanoquinodimethane to give [3.3] paracyclophane derivative via a zwitterionic intermediate which can be trapped by polar multiple bonds.
HIGH TEMPERATURE OXIDATION OF COPPER IN NITROGEN OXIDE OBEYING A LINEAR LAW
Authors: Takasu Yoshio , Takagi Morio , Matsuda Yoshiharu 
Published: July 2006

Abstract
The oxidation of copper in nitrogen oxide(700–820°C, 3.5–14 Torr) has been found not only to obey a linear oxidation law, but also to be a first order reaction. The apparent activation energy was 113 KJ/mol. According to the x-ray diffractometry, x-ray photoelectron spectroscopy and ion microanalysis, only Cu2O was found in the oxide layers. The rate determining step was a reaction between nitrogen oxide and the surface of Cu2O and it was shown by an equation: 2NO→N2+2·O2− + 4·⊕.
SYNTHESES OF POTENT MUTAGENS IN TRYPTOPHAN PYROLYSATES
Authors: Akimoto Hiroshi , Kawai Akiyoshi , Nomura Hiroaki , Nagao Minako , Kawachi Takashi , Sugimura Takashi 
Published: July 2006

Abstract
The mutagenic γ-carbolines, 3-amino-1-methyl-5H-pyrido[4,3-b]indole (IV) and 3-amino-1,4-dimethyl-5H-pyrido[4,3-b]indole (XIII) have been synthesized by condensation of 3-acetylindole-2-acetonitrile (III) with ammonia and by thermal decomposition of 2-amino-3,6-dimethyl-4-(1-benzotriazolyl)pyridine (XII), respectively. Synthesis of IV has been achieved by an alternative route involving acid catalyzed cyclization of α-acetamido-β-(2-indole)propionic acid (V), followed by dehydrogenation and Curtius rearrangement.
INFRARED STUDY OF CHEMISORBED AMMONIA ON AN EVAPORATED IRON FILM
Authors: Okawa Tadashi , Onishi Takaharu , Tamaru Kenzi 
Published: July 2006

Abstract
The infrared absorption at 500 cm−1 was observed during the course of ammonia decomposition on an evaporated iron film. It was assigned to an iron-nitrogen stretching vibration of surface nitrogen species which may be described as Fe–NHX. The assignment was confirmed by the exchange reaction with 15N labeled ammonia.
ELECTROCHEMICAL GENERATION OF CARBALKOXYNITRENES FROM N,N-DICHLORO CARBAMATES
Authors: Fuchigami Toshio , Nonaka Tsutomu 
Published: July 2006

Abstract
Carbalkoxynitrenes (II) can be generated from N,N-dichloro carbamates (methyl, ethyl) (I) by electrolysis, as shown by the formation of 2-(carbalkoxyamino)-1,4-dioxane (III) in the electroreduction of (I) in the presence of dioxane.
APPLICATION OF 2-TRIFLUOROMETHANESULFONYLOXYPYRIDINE IN TRIFLUOROACETIC ACID TO ACYLATION OF AROMATICS
Authors: Keumi Takashi , Saga Hiroshi , Taniguchi Rikio , Kitajima Hidehiko 
Published: July 2006

Abstract
New method for synthesis of aromatic ketones was investigated. 2-Trifluoromethanesulfonyloxypyridine (TSP) in trifluoroacetic acid was very useful in the condensation of carboxylic acids with some aromatic compounds to give aromatic ketones. The reaction of arenes with benzoic acid in the presence of TSP in trifluoroacetic acid gave benzoylarenes. By the same method, 2-acylfluorenes were obtained from carboxylic acids and fluorene.
CLEAVAGE OF ARALKYL– AND ARYL–OXYGEN AND –NITROGEN BONDS BY THE HYDROGEN TRANSFER FROM ORGANIC COMPOUNDS CATALYZED BY NOBLE METAL SALTS
Authors: Nishiguchi Takeshi , Imai Hideaki , Fukuzumi Kazuo 
Published: July 2006

Abstract
Aralkyl– and aryl–oxygen bonds of ethers, esters, and alcohols, and aralkyl– and aryl–nitrogen bonds of amines, an imide and an amide were hydrogenolyzed by the hydrogen transfer from organic compounds such as indoline in the presence of some noble metal salts. In these reactions, not only benzyl group but phenethyl and phenyl group were removed.
CARBON-13 NMR STUDY OF AN INTERMEDIATE COMPLEX IN HYDROESTERIFICATION OF OLEFINS
Authors: Shin Shigemitsu , Matsuda Akio , Nakayama Jun-ichi , Bando Ken-ichiro 
Published: July 2006

Abstract
Reaction of a new hydroesterification catalyst H2Co3Py5(CO)9 with 2-vinylpyridine yielded an alkylcobalt complex (Remark: Graphics omitted.), which is considered to be an intermediate complex in the hydroesterification of 2-vinylpyridine. The 13C-NMR parameters of the α- and β-methylene groups were δ=60.0 ppm (JC-H=147 Hz) and 37.4 ppm (132 Hz), respectively.
PHOTOREACTIONS OF HETEROAROMATIC COMPOUNDS VII. PROMOTION AND INHIBITION OF PHOTO-METHOXYLATION OF METHYL 2-PYRIDINECARBOXYLATE IN ACIDIC METHANCLIC SOLUTIONS BY ADDITIVES. SPECIFIC PROMOTION BY 4-SUBSTITUTED PYRIDINES
Authors: Miyazawa Yoshiyuki , Hasegawa Ryo , Tobita Etsuo , Furihata Toshikazu , Sugiyama Toru , Sugimori Akira 
Published: July 2006

Abstract
Photo-methoxylation of methyl 2-pyridinecarboxylate at 6-position is promoted specifically by 4-substituted pyridines. Substituted pyridines at 2- or 3-position have no effect or inhibit the process. Many other substances including sensitizers (singlet or triplet), electron donors and acceptors do not promote the photo-methoxylation.
PARTICIPATION OF ALLYLIC HYDROXYL GROUP IN THE BROMINE ADDITION TO CYCLOHEXENE DERIVATIVES, 1α- AND 1β-HYDROXY-2,3-DEHYDRO-5α-SANTANOLIDE
Authors: Yamakawa Koji , Azusawa Kazutoyo , Nishitani Kiyoshi 
Published: July 2006

Abstract
Addition of bromine to 1α-hydroxy-2,3-dehydro-5α-santanolide (6a) and its derivatives (6b and c) gave diequatorial 2α,3β-dibromides (9a, b, and c) as major products and diaxial 2β,3α-dibromides (10a, b, and c) as minor products, respectively. This bromine addition is all abnormal in the Früst-Plattner rule and its reaction mechanisms are proposed.
SYNTHESIS OF GRANULIBERIN R. AN APPLICATION OF THE ‘HOLD-IN-SOLUTION’ METHOD
Authors: Muramatsu Ichiro , Kimura Atsuko , Nozaki Sukekatsu , Nakajima Terumi , Yasuhara Tadashi , Hirai Yuko 
Published: July 2006

Abstract
Granuliberin R, a new dodecapeptide isolated from Rana rugosa, was synthesized. The ‘hold-in-solution’ method was applied to the preparation of the fragment peptides.
BIOGENETIC-LIKE CYCLIZATION OF FARNESOL AND NEROLIDOL TO BISABOLENE BY THE USE OF 2-FLUOROBENZOTHIAZOLIUM SALT
Authors: Kobayashi Susumu , Tsutsui Mikio , Mukaiyama Teruaki 
Published: July 2006

Abstract
Treatment of trans, cis-farnesol or nerolidol with 2-fluorobenzothiazolium salt in the presence of tri-n-butylamine afforded monocyclic sesquiterpenes, mainly α-bisabolene, in good yields.
THE SESQUITERPENES OF CACALIA SPECIES. II. THE STRUCTURE OF CACALAL AND THE INTERCONVERSIONS OF THE CONSTITUENTS
Authors: Naya Keizo , Takai Kunihiro , Nakanishi Mikihiko , Omura Kanji 
Published: July 2006

Abstract
Two known sesquiterpenes, cacalone (I) and decompostin (II), and one new, named cacalal (III), have been isolated from Cacalia delfiniifolia Sieb. et Zucc. The structure of III and cacalolide (XIVa) have been established by selective oxidation of cacalol (IV). The interconversions of the constituents were also investigated.
n-PROPENYL AND σ-ALLYL INTERMEDIATES IN THE HYDROGENATION OF METHYLACETYLENE AND ALLENE ON MoS2
Authors: Okuhara Toshio , Kondo Toshihiko , Tanaka Ken-ichi 
Published: July 2006

Abstract
The hydrogenation of methylacetylene on MoS2 proceeds through n-propenyl intermediate, (Remark: Graphics omitted.), however, the hydrogenation of allene occurs through σ-allyl intermediate, (Remark: Graphics omitted.). These two intermediates are in marked contrast with the intermediates for the hydrogenation of butadiene and olefins taking place via iso-butenyl and iso-alkyl intermediates on the MoS2 catalyst.
STUDIES ON PHOTOACTIVATED ELECTRON-TRANSPORT SYSTEMS. I. REDUCTION OF HEMIN AND ANTHRAQUINONESULFONATE AS MEDIATED BY PYRIDINIUM IONS AND PHOTOEXCITED RUTHENIUM(II) COMPLEXES
Authors: Takuma Keisuke , Kajiwara Makoto , Matsuo Taku 
Published: July 2006

Abstract
Photoexcited state of tris(2,2′-bipyridine)ruthenium(II) ion serves as a good reducing agent, if EDTA is present in the solution. Pyridyl radical and 4,4′-bipyridinium cation radical were obtained by this means of photoirradiation, and proved to be useful as mediators for catalytic reduction of Hemin and 9,10-anthraquinone-l-sulfonate.
RADIATION-INDUCED REACTIONS OF PYRIDINECARBOXYLIC ACID ESTERS IN ACIDIC ALCOHOLIC SOLUTIONS. SUBSTITUTION BY ALKYL AND HYDROXYALKYL GROUPS AND REDUCTION OF CARBOXYLIC ESTER TO ALCOHOL
Authors: Nakamura Kazuhito , Sugiyama Toru , Suzuki Toru , Sugimori Akira 
Published: July 2006

Abstract
The main reactions of pyridinecarboxylic acid esters induced by Co-60 γ-rays are 1) substitution on the pyridine ring by alkyl or hydroxyalkyl groups derived from solvent alcohols and 2) the reduction of carboxylic esters to alcohols (hydroxymethyl group). Substitution is dominant in methanol solutions and reduction is dominant in 2-propanol solutions.
PHOTOLYSIS OF 1,3,4-OXADIAZOLES IN ALCOHOLS
Authors: Tsuge Otohiko , Oe Koji , Tashiro Masashi 
Published: July 2006

Abstract
Irradiation of 2,5-diphenyl-1,3,4-oxadiazole in alcohols induces a heterolytic addition of alcohols to the C=N bond of the oxadiazole, followed by cycloelimination to yield benzoic acid ester and benzonitrile imine. The latter reacts with the oxadiazole to form 4-benzamido-3,5-diphenyl-1,2,4-triazole which is photochemically transformed into benzamide and 3,5-diphenyl-1,2,4-triazole. Upon irradiation of 2-phenyl-1,3,4-oxadiazole in methyl alcohol, the 1:1 adduct is obtained.
MEERWEIN-PONNDORF-VERLEY REACTION OVER MAGNESIUM OXIDE
Authors: Takezawa Nobutsune , Kobayashi Haruo 
Published: July 2006

Abstract
The hydrogen transfer reaction between ethanol and acetone CH3CH2OH + (CH3)2CO→CH3CHO + (CH3)2CHOH was studied over magnesium oxide by use of deuterium tracer. Ethanol transfered its hydrogen of CH bond to carbonyl carbon atom, suggesting that the hydride ion transfer from surface ethoxide anion is involved in the reaction. On the other hand, methyl hydrogens in acetone were rapidly exchanged with hydroxyl in ethanol.
SYNTHETIC APPROACH TO A NEW HETEROCYCLE, ISOINDOLO[2,1-c]THIAZOLE
Authors: Shimoharada Hiroshi , Ikeda Shigehiko , Kajigaeshi Shoji , Kanemasa Shuji 
Published: July 2006

Abstract
Isoindolo[2,1-c]thiazolium salt, a precursor of isoindolo[2,1-c]thiazole, was synthesized via four steps starting from o-(bromoacetyl)benzoic acid. This salt reacted with acetic anhydride to afford the 5-acetyl derivative which underwent intramolecular 10π cyclization upon treatment with triethylamine.
SILYL ANIONS VII. ELECTRON TRANSFER FROM TRIMETHYLSILYLPOTASSIUM TO BENZOPHENONE AND NAPHTHALENE. GENERATION OF ANION RADICALS IN NONPOLAR SOLVENTS SUCH AS n-HEXANE
Authors: Sakurai Hideki , Kira Mitsuo , Umino Hiroshi 
Published: July 2006

Abstract
Trimethylsilylpotassium, prepared in a nonpolar solvent by the reaction of hexamethyldisilane with potassium methoxide in the presence of 18-crown-6, is a useful reagent for efficient homogeneous electron transfer. The first esr spectra of anion radicals of benzophenone and naphthalene in n-hexane as well as those in THF and benzene were recorded.
A METHOD FOR A MEASUREMENT OF THE ELECTRON TRANSFER RATE CONSTANT IN ECL
Authors: Itoh Kiminori , Sukigara Mitsunori , Honda Kenichi 
Published: July 2006

Abstract
A simple method for measuring reaction rate constants of anion–cation annihilation reactions is proposed. The method is principally capable of obtaining an accurate value of the total reaction rate constant K in Eq. (4) . A preliminary result is given for the diphenylanthracene–benzonitrile system.
SELECTIVE REDUCTION OF OXIMES WITH PYRIDINE-BORANE
Authors: Kikugawa Yasuo , Kawase Masami 
Published: July 2006

Abstract
Pyridine-borane, which was readily prepared from pyridine hydrochloride and sodium borohydride, reduced oximes to the corresponding hydroxylamines in good yields with simple procedure. Other functional groups (ester, nitrile, nitro, amide, and halide) present in the same molecule of oximes were not reduced by this reagent.
NEW SYNTHETIC REACTIONS BASED ON 1-METHYL-2-FLUOROPYRIDINIUM SALTS. FACILE CONVERSION OF ALCOHOLS TO THIOALCOHOLS
Authors: Hojo Ko , Yoshino Hiroshi , Mukaiyama Teruaki 
Published: July 2006

Abstract
Facile conversion of alcohols to thioalcohols via thiolesters is described. The synthetic scheme involves (i) preparation of thiolesters (5) by the reaction of ethanethioate anion with 2-alkyloxypyridinium salts (3), formed from 1-methyl-2-fluoropyridinium salt (1) and alcohols, and (ii) subsequent reduction of 5 to thioalcohols. A clean inversion of configuration is noted.
BILAYER MEMBRANES PREPARED FROM MODIFIED DIALKYLAMMONIUM SALTS AND METHYLDIALKYLSULFONIUM SALTS
Authors: Kunitake Toyoki , Okahata Yoshio 
Published: July 2006

Abstract
Electron microscopy showed that modified dialkylammonium salts and methyldialkylsulfonium salts formed bilayers in dilute aqueous solutions. The effect of polar head groups on the aggregation properties of the amphiphiles was discussed.
SYNTHESIS AND CHARACTERIZATION OF CATIONIC DIAMINOCYCLOPROPENYLIDENE MERCURY COMPLEX
Authors: Yoshida Zen-ichi , Konishi Hisatoshi , Kamitori Yasuhiro , Ogoshi Hisanobu 
Published: July 2006

Abstract
Cationic diaminocyclopropenylidene mercury complexes (1) were synthesized by the reaction of diaminocyclopropenium perchlorate with mercury acetate. Coordination of two diaminocyclopropenylidenes to divalent mercury was confirmed on the basis of microanalyses and spectral measurements. The value of 13C–199Hg coupling constant in 1 indicates a diagnostic of sp hybridization of the C–Hg bond.
SYNTHESIS OF [3.3]PARACYCLOPHANE-5,8-QUINONE
Authors: Shinmyozu Teruo , Inazu Takahiko , Yoshino Tamotsu 
Published: July 2006

Abstract
[3.3]Paracyclophane-5,8-quinone I was synthesized. Its charge-transfer absorption maximum at 406 nm (ε 407) showed a marked red shift as compared with that of [2.2]- and [4.4]paracyclophanequinones.
SELECTIVE HYDROGENATION OF 1,3-BUTADIENE CATALYZED BY COBALT(I)-BIPYRIDYL COMPLEXES
Authors: Yamamoto Nobuyuki , Kanai Hiroyoshi , Tarama Kimio 
Published: July 2006

Abstract
1,3-Butadiene was selectively hydrogenated to cis-2-butene by cobalt(I)-bipyridyl complexes. The order of the addition of butadiene to cobalt complexes determined the distribution of products. The catalytic activity was affected by the bipyridyl/cobalt ratio and halide anions.
2,2-DIFLUORO-1-PHENOXYVINYLLITHIUM: A NEW REAGENT FOR THE PREPARATION OF 2-PHENOXY-2-ALKENOIC ACIDS FROM CARBONYL COMPOUNDS
Authors: Tanaka Kiyoshi , Nakai Takeshi , Ishikawa Nobuo 
Published: July 2006

Abstract
The title reagent 3, readily generated in situ from the reaction of 2,2,2-trifluoroethoxybenzene (1) with lithium diisopropylamide, was found to be useful for the preparation of 2-phenoxy-2-alkenoic acids (6) from various carbonyl compounds via facile acid hydrolysis of the initially formed difluorovinylcarbinols (5).
SYNTHESIS OF EVERNITROSE AND ITS ENANTIOMER
Authors: Yoshimura Juji , Matsuzawa Masafumi , Sato Ken-ichi , Funabashi Masuo 
Published: July 2006

Abstract
Evernitrose (1: 2, 3, 6-trideoxy-3-c,4-o-dimethyl-3-nitro-l-arabino-hexopyranose) and its enantiomer (17) were synthesized from methyl 2,6-dideoxy-4-o-methyl-α-l-erythro-hexopyranosid-3-ulose and methyl 4,6-o-benzylidene-2-deoxy-α-d-erythroa-hexopyranosid-3-ulose, respectively. In both cases, the unique nitro group attached to the tertiary branching carbon was introduced by oxidation of the corresponding amino derivatives prepared by Bourgeois’s method.
STEREOCHEMICAL STUDIES ON THE ELEMENE-TYPE SESQUITERPENES FROM ACORUS CALAMUS L.
Authors: Niwa Masatake , Terada Yukimasa , Iguchi Masanobu , Yamamura Shosuke 
Published: July 2006

Abstract
The absolute configuration of epi- and isoshyobunone was established as 2 and 3, respectively, on the basis of their chemical and spectral data together with base-catalyzed isomerization of shyobunone (1) affording natural isoshyobunone and the enantiomer of natural epishyobunone. In addition, conformations of the base-catalyzed isomerization products (3, 6, 8, 9, and 11) are also discussed.
ALKYLATION, ARYLATION, AND VINYLATION OF ACYL CHLORIDES BY MEANS OF ORGANOTIN COMPOUNDS IN THE PRESENCE OF CATALYTIC AMOUNTS OF TETRAKIS(TRIPHENYLPHOSPHINE)PALLADIUM(O)
Authors: Kosugi Masanori , Shimizu Yutaka , Migita Toshihiko 
Published: July 2006

Abstract
Alkylation, arylation, and vinylation of acyl chlorides by means of organotin compounds in the presence of catalytic amounts of tetrakis(triphenylphosphine)palladium(O) were demonstrated. The corresponding ketons were obtained in fairly good yields.
A HIGHLY ACTIVE NICKEL OXIDE CATALYST FOR ETHYLENE HYDROGENATION
Authors: Tsukada Kiyoshi , Ozaki Atsumu 
Published: July 2006

Abstract
A nickel oxide catalyst prepared by homogeneous precipitation with urea followed by decomposition in vacuo shows an extraordinarily high activity in ethylene hydrogenation. An evidence is given to indicate that the generation of active sites is associated with a partial reduction of oxide by the precipitant, urea, remained in the oxide.
CALORIMETRIC AND DIELECTRIC STUDIES OF PHASE TRANSITION IN TlNO2 CRYSTAL
Authors: Moriya Keiichi , Matsuo Takasuke , Suga Hiroshi , Seki Syûzô 
Published: July 2006

Abstract
The molar heat capacity of TlNO2 crystal has been measured between 14 and 355 K with an adiabatic calorimeter. A heat capacity anomaly due to a phase transition was found at (282.4±0.5) K. The enthalpy and entropy changes of the transition are 6400 Jmol−1 and 23.6 J K−1mol−1, respectively. The complex dielectric permittivity was measured in the frequency range between 200 Hz and 100 kHz. Dielectric dispersion and relaxation were found between 80 and 180 K. The activation enthalpy derived from the dielectric measurement is 19 kJ mol−1 and is possibly related to the reorientation of the NO2− ion.
A POSSIBLE SULFURANE: N-DIPHENYLSULFILIMINYL SULFONIUM SALT (

Remark: Graphics omitted.

)
Authors: Furukawa Naomichi , Takahashi Fujio , Akasaka Takeshi , Oae Shigeru 
Published: July 2006

Abstract
Sulfiliminyl sulfonium salts(IIIa,b) were prepared. NMR spectra indicate that III has a sulfurane structure.
AZIDOAZONETHINE-TETRAZOLE ISOMERISM IN TETRAZOLO[1,5-a]PERIMIDINE
Authors: Claramunt Rosa Ma , Elguero José 
Published: July 2006

Abstract
The equilibrium between 2-azidoperimidine and tetrazolo[1,5-a]perimidine is strongly shifted towards the latter reflecting the poor aromatic character of the perimidine ring. The title compound is the first example of a new class of condensed tetrazoles.
ENZYMATIC SYNTHESIS OF CLITIDINE
Authors: Tono-Oka Shuichi , Sasaki Akio , Shirahama Haruhisa , Matsumoto Takeshi , Kakimoto Shichiro 
Published: July 2006

Abstract
Clitidine (1) was synthesized by successive enzymatic cleavages of a new NAD-analogue, which was in turn prepared in a good yield from β-NAD and methyl 4-aminonicotinate utilizing the trans-glycosidation action of pig-brain NADase. The present synthesis establishes the β riboside structure of 1.
A SYNTHETIC APPROACH TOWARDS THE CLERODANE DITERPENOIDS, A VERSATILE SYNTHON
Authors: Apsimon John W , Yamasaki Kazuyuki 
Published: July 2006

Abstract
A potential synthetic route to the trans-clerodane diterpenes is described. Two key features involved in the synthesis are a unique acid-catalyzed Michael additioncyclization sequence developed by G. Saucy, and an opening of the cyclic hemiketal intermediate 10 by thioketalization. A known steroidal synthetic intermediate 7 prepared in a series of reactions from 4 confirmed the trans-decalin structure of our intermediates.