bluuebunny/crossref_metadata_2025_split huggingface dataset:
THE SELECTION OF O2(1Δg)-OLEFIN REACTION COURSES. INTERMOLECULAR NONBONDED ATTRACTION AND π BOND POLARITY OF OLEFINS
Authors: Inagaki Satoshi , Fujimoto Hiroshi , Fukui Kenichi 
Published: July 2006

Abstract
Two important factors are proposed to select the course of singlet oxygen reactions with olefins. The polarity of olefin π bond and the intermolecular nonbonded attraction controls the orientation of the initially-attacking oxygen atom and the tailing one in a perepoxide structure, respectively.
FACILE SKELETAL REARRANGEMENT BY SOLVOLYSIS OF TRICYCLODECAENYL TOSYLATE
Authors: Sasaki Tadashi , Kanematsu Ken , Kondo Akihiro 
Published: July 2006

Abstract
Acetolysis of the tricyclic tosylate (exo-2) leads to a mixture of the transannular product (4) and the rearranged product (5), whereas the epimer (endo-2) undergoes only rearrangement to syn-8.
A NEW ROUTE TO ALKYL SELENOCYANATE FROM OLEFIN VIA HYDROBORATION. REACTION OF ORGANOBORANES WITH FERRIC SELENOCYANATE
Authors: Arase Akira , Masuda Yuzuru 
Published: July 2006

Abstract
Trialkylboranes, prepared by hydroboration of terminal or internal olefins, react with ferric selenocyanate in an aqueous tetrahydrofuran to give corresponding primary or secondary alkyl selenocyanates.
THE REACTIONS OF DIBENZYLSELENONIUM YLIDE, IMIDE, AND SELENOXIDE WITH TRIPHENYLPHOSPHINE
Authors: Tamagaki Seizo , Hatanaka Isao , Tamura Katsuyuki 
Published: July 2006

Abstract
The reactions of dibenzylselenonium dicyanomethylide or cyanomethoxycarbonylmethylide with triphenylphosphine at room temperature gave 2-benzyl-2-cyano-3-phenylpropanenitrile or methyl 2-benzyl-2-cyano-3-phenylpropanoate by deselenization and the addition of acetic acid into the reaction system changed the reaction mode, yielding mainly dibenzyl diselenide. Meanwhile, the corresponding selenonium imide and selenoxide afforded dibenzyl selenide.
A NEW COMPOUND, Lu2V2O7
Authors: Kitayama Kenzo , Katsura Takashi 
Published: July 2006

Abstract
A new compound, Lu2V2O7, which belongs to pyrochlore-type, has been successfully synthesized under a low oxygen partial pressure at 1200°C and its formation conditions in oxygen partial pressure, crystal parameters including lattice constant, unit cell volume, density, spacing, and relative intensities were determined.
DETERMINATION OF THE OPTICAL PURITY OF A SMALL AMOUNT OF AMINO ACIDS (1–5 mg) EMPLOYING STEREOSELECTIVE COMPLEX FORMATION
Authors: Fujii Yuki , Hirasawa Shigeru , Takahashi Sozo 
Published: July 2006

Abstract
A new method has been established to determine the optical purity of about 1–5 mg of sample amino acids within a short time. The method utilizes the fact that [CH3COCH2–Co(acac2en)(H2O)] reacts with l-(or d-) amino acids rapidly to form ΛL-(or ΔD-)cis-β1(fac)-[Co(acac2en)(aa)] stereoselectively and thus, the reaction solution shows much larger optical rotation than the free amino acids.
PROTON MAGNETIC RESONANCE STUDY ON CONFORMATION OF 7,8,10,11-TETRAHYDRO-9H-CYCLOOCTA[de]NAPHTHALENE-9-ONE
Authors: Kamada Toshihiro , Yamamoto Osamu 
Published: July 2006

Abstract
The proton magnetic resonance spectra of the title compound (1) have been studied at various temperatures. The changes in variable-temperature PMR spectra of 1 are interpreted in terms of interconverting boat conformations. The free energy barrier ΔG\eweq for the ring inversion was found to be 12.4 kcal/mol. The stereochemical properties inherent in the peri-8 ring in 1 were discussed.
SELECTIVE HYDROGENATION OF DIOLEFINS CATALYZED BY HALOGENOTRIS(TRIPHENYLPHOSPHINE)COBALT(I)-LEWIS ACID
Authors: Kawakami Kiyoshi , Mizoroki Tsutomu , Ozaki Atsumu 
Published: July 2006

Abstract
Hydrogenation of diolefins to monoenes is highly selectively catalyzed by halogenotris(triphenylphosphine)cobalt(I) in the presence of Lewis acid in bromobenzene. Internal double bonds are reduced more rapidly than terminal ones.
SYNTHESIS AND PROPERTIES OF DIALKYL(ACETYLACETONATO)BIS(TERTIARY PHOSPHINE)COBALT(III)
Authors: Ikariya Takao , Yamamoto Akio 
Published: July 2006

Abstract
The complexes I-IV, CoR2(acac)(PR′3)2 (R=Me, Et, n-Pr, iso-Bu; PR′3=PEt3,P(n-Bu)3,PPhMe2,PPh2Me) have been prepared by the reactions of Co(acac)3, AlR2(OEt) and tertiary phosphines in ether. These complexes were characterized by NMR, IR spectroscopy and the chemical reactions. H-D scrambling in ethyl groups of Co(CH2CD3)2(acac)(PPhMe2)2 (V) has been observed.
THE REACTIONS OF CARBON DIOXIDE WITH DIALKYL COMPLEXES OF PALLADIUM(II)
Authors: Ito Takashi , Tsuchiya Hirotaka , Yamamoto Akio 
Published: July 2006

Abstract
Dialkylpalladium complexes, [Pd(CH3)2L2] and [Pd(C2H5)2L2], reacted with CO2 to yield CO2-coordinated complexes, [Pd(CH3)(CO2)L2] (L = PEt3, 1, and PMePh2, 2 (isolated as an acetone solvate)) and [Pd(C2H4)(CO2)L2] (L = PEt3, 3, and PMePh2, 4), respectively. Complexes 1–4 were isolated and characterized on the basis of elemental analysis, chemical reactions, IR, and 1H-NMR spectral evidence.
REACTION OF 1-CHLORO-2,4-DINITROBENZENE WITH THIOLS IN THE PRESENCE OF A CROWN ETHER
Authors: Nakabayashi Takeshige , Kawamura Shunichi , Horii Toyokazu , Hamada Masayuki 
Published: July 2006

Abstract
The title reaction was carried out and the corresponding 2,4-dinitrophenyl sulfides were obtained. The scope of the reaction was examined, and visible and NMR spectra of the reaction mixtures were measured.
PREPARATION AND PROPERTIES OF COMPLEX SALT OF SULFILIMINE AND TCNQ
Authors: Yamamoto Tamotsu , Yamauchi Masaharu , Okawara Makoto 
Published: July 2006

Abstract
The interaction between sulfilimines and TCNQ in CH2Cl2 was examined. The interaction depended markedly upon the structure of the sulfilimines: the higher the basicity of the sulfilimine, the stronger the interaction observed. For the crystalline complex of S,S-dimethyl-N-p-nitrophenylsulfilimine–TCNQ, 1:1 structure of biradical-salt type was estimated by spectroscopic and chemical analyses.
SYNTHETIC APPROACH TO FUJENOIC ACID III. SYNTHESIS OF DEMETHYLFUJENOIC ACID DERIVATIVE
Authors: Kato Tadahiro , Suzuki Takeshi , Ototani Noboru , Kitahara Yoshio 
Published: July 2006

Abstract
Demethylfujenoic acid derivative (14) has been synthesized from the key intermediate (2) by the application of Diels–Alder and subsequent reactions as shown in the scheme.
A MULTI-CYCLIC INTERACTION EFFECT ON SYMMETRY-IMPOSED STEREOSELECTION RULE. ANTI-BISALLYLIC SYSTEM
Authors: Inagaki Satoshi , Minato Tsutomu , Fujimoto Hiroshi , Fukui Kenichi 
Published: July 2006

Abstract
The symmetry-imposed stereoselection rule is partially modified on the basis of orbital interaction. The modification is required for multi-cyclic interactions. The mechanisms of “symmetry-forbidden” 1,3-migration in bisallylic compounds were discussed successfully.
REDUCTION BY A MODEL OF NAD(P)H. VIII. EFFECTS OF METAL ION ON THE COURSE AND STEREOCHEMISTRY OF THE BIOMIMETIC REDUCTION OF OLEFIN
Authors: Ohnishi Yutaka , Kagami Masayuki , Numakunai Takashi , Ohno Atsuyoshi 
Published: July 2006

Abstract
Asymmetric reduction of an olefin is achieved with a chiral NAD(P)H-model compound in the presence of magnesium perchlorate which represses a side reaction catalyzed by a base.
NEW REAGENTS FOR THE SYNTHESIS OF α,β-UNSATURATED ESTERS: LITHIATED O-ALKYL S-ETHOXYCARBONYLMETHYL DITHIOCARBONATE AND THIOCARBONATE
Authors: Tanaka Kazuhiko , Tanikaga Rikuhei , Kaji Aritsune 
Published: July 2006

Abstract
α,β-Unsaturated esters have been easily synthesized in good yields by treating carbonyl compounds with O-alkyl S-ethoxycarbonylmethyl dithiocarbonates or thiocarbonate in the presence of lithium diisopropylamide. The key intermediates for the synthesis of the recently isolated boll weevil sex pheromone were prepared in good yields by this method.
ASYMMETRIC TRANSAMINATION FROM AMINO ACID (III) ASYMMETRIC SYNTHESIS OF PHENYLGLYCINE BY CHEMICAL TRANSAMINATION FROM OPTICALLY ACTIVE AMINO ACIDS TO BENZALDEHYDE
Authors: Yamada Shun-ichi , Hashimoto Shun-ichi 
Published: July 2006

Abstract
d-Phenylglycine, an important constituent of penicillin and cephalosporin antibiotics, was asymmetrically synthesized by hydrocyanation of the Schiff bases prepared from benzaldehyde and l-amino acid t-butyl esters, followed by oxidative decarboxylation. When l-ψ-leucine t-butyl ester was used as a chiral reagent, the optical yield of d-phenylglycine Increased to 96.5%.
REGIOSPECIFIC ALDOL SYNTHESIS. THE GENERATION OF ACTIVE ENOLATES BY THE REDUCTION OF 2,2,2-TRICHLOROETHYL ESTERS OF α-SUBSTITUTED-β-KETO ACIDS WITH Zn
Authors: Mukaiyama Teruaki , Sato Toshio , Suzuki Seiji , Inoue Tan , Nakamura Hideo 
Published: July 2006

Abstract
α-Substituted-β-keto acid 2,2,2-trichloroethyl esters reacted with aldehydes regiospecifically at α-carbon to the ester carbonyl in the presence of Zn to give the corresponding aldols in good yields.
ACTIVITY OF Ni–P CATALYST FOR THE DEHYDROGENATION OF METHYLCYCLOHEXANE
Authors: Nozaki Fumio , Sekura Takashi , Kawai Masaji 
Published: July 2006

Abstract
The Ni-P catalyst prepared by reduction of Ni3(PO4)2 in hydrogen promoted selectively the dehydrogenation of methylcyclohexane to toluene. The repeated reoxidation-reduction of the catalyst resulted in an increase in dehydrogenation activity.
THE SYNTHESIS OF α,γ-DINUCLEOSIDE TRIPHOSPHATES. THE CONFRONTED NUCLEOTIDE STRUCTURE FOUND AT THE 5′-TERMINUS OF EUKARYOTE MESSENGER RIBONUCLEIC ACID
Authors: Hata Tsujiaki , Nakagawa Iwao , Shimotohno Kunitada , Miura Kin-ichiro 
Published: July 2006

Abstract
α,γ-Dinucleoside triphosphates showing the recently discovered modified structure at the 5′-terminus of eukaryote mRNA were synthesized by use of a new method employing di-n-butylphosphinothioyl bromide.
TOTAL SYNTHESIS OF (±)-NORKETOTRICHODIENE
Authors: Yamakawa Koji , Sakaguchi Reiji , Nakamura Tadaharu , Watanabe Kensuke 
Published: July 2006

Abstract
The total synthesis of (±)-norketotrichodiene (14) is described. The photocycloaddition reaction of 3,6-dimethylcyclohexenone and cyclotene afforded the tricyclo[4.3.23,5.O1,6]undecane derivatives (4 and 5). The retro-aldol reaction of (4) with alkali gave triketone (6a), which was converted to the tosylate (6b). Catalytic hydrogenolysis of (6b) yielded the ketol (10). Treatment of (10) with POCl3-pyridine gave (±)-norketotrichodiene (14) which was identical with the norketone (14) derived from (+)-trichodiene (1).
CYCLOPHANES VI. TEMPERATURE DEPENDENT CONFORMATIONS OF 3,6-DIKETO[8](1,4)NAPHTHALENEOPHANE AND 3,6-DIKETO[8] (2,5)FURANOPHANE
Authors: Haley James F , Keehn Philip M 
Published: July 2006

Abstract
A temperature dependent conformational change in the aliphatic chain of 3,6-diketo[8]naphthalenophane is observed by variable temperature nuclear magnetic resonance spectroscopy; the energy of activation for the process is 9.4±0.2 Kcal/mole. For 3,6-diketo[8](2,5)furanophane the conformational change of the chain is more facile than that of the ring with a conservative upper limit for ring rotation of about 9.1 Kcal/mole.
ROLES OF TITANIUM COMPLEX IN THE CATALYTIC HYDROMETALATION AND ISOMERIZATION OF OLEFINS
Authors: Isagawa Kakuzo , Tatsumi Kimio , Kosugi Hiroaki , Otsuji Yoshio 
Published: July 2006

Abstract
The reaction of Cp2TiCl2 with LiAlH4 forms the complex Cp2Ti(AlH3)2 [1] with the evolution of H2. Treatment of [1] with 1-octene gave the isolable titanium complex which was characterized as [Cp2Ti(AlH3)2][C6H13CH=CH2] [2a]. The roles of [1] and [2a] in the catalytic hydrometalation and the catalytic isomerization of olefins are discussed.
ELECTROREDUCTIVE ACYLATION OF BENZYL CHLORIDE AND RELATED COMPOUNDS WITH ACID CHLORIDES
Authors: Shono Tatsuya , Nishiguchi Ikuzo , Ohmizu Hiroshi 
Published: July 2006

Abstract
The electroreduction of benzyl chloride and related compounds in the presence of acid chlorides gave alkyl benzyl ketones in moderate yields. The controlled potential electrolysis suggests that the electron transfer from the cathode to benzyl chloride yielding an anionic species is the initiation step of this reductive acylation.
PHOTOCYCLOADDITION BETWEEN INDENE AND ELECTRON-RICH OLEFINS THROUGH INDENE CATION RADICAL
Authors: Mizuno Kazuhiko , Kaji Ryoji , Otsuji Yoshio 
Published: July 2006

Abstract
Irradiation of a solution of indene and alkyl vinyl ethers in acetonitrile in the presence of 1-naphthonitrile efficiently gave two stereo-isomeric (2+2) cycloadducts; endo-2-alkoxy-2a,7a-dihydro-7H-cyclobut [a] indene and the corresponding exo-isomer. The quenching and sensitizing experiments suggested that the above cycloadducts were formed via indene cation radical.
DIKETENE AS A 3-BUTENOIC ACID SYNTHON IN TRANSITION METAL-CATALYZED ALKYLATION OF A TRIMETHYLSILYLMETHYL GRIGNARD REAGENT
Authors: Itoh Kenji , Yogo Toshinobu , Ishii Yoshio 
Published: July 2006

Abstract
The reaction of (CH3)3SiCH2MgCl with diketene yields 3-trimethylsilylmethyl-3-butenoic acid (1) in the presence of a catalytic amount of NiCl2(95%), PdCl2(68%), CoCl3(60%), or CuI(20%) under moderate conditions. The acid, 1, is isomerized to the conjugated acid, 4-trimethylsilyl-3-methyl-2-butenoic acid (2) by means of an excess LiN(SiMe3)2. The rearrangement proceeds stereoselectively to 2-(E) isomer by addition of diglyme or N,N,N′,N′-tetramethylethylenediamine. This is the first example of the vinyl-oxygen bond cleavage of diketene.
REVISION OF STRUCTURE OF PETASITOLIDES BY THE SYNTHESIS OF 3β-AND 3α-HYDR0XY- AND 2β-SENECIOYLOXYEREMOPHILENOLIDES
Authors: Kitahara Yoshio , Maeda Shuichi , Ueno Masako , Funamizu Makoto , Kato Tadahiro , Novotný L , Herout V , Šorm F 
Published: July 2006

Abstract
3-Hydroxy-(I, X = β- and α-OH; Y = H) and 2 β-senecioyloxy-(I, X = H; Y = OCOCH=CMe2) eremophilenolides were synthesized stereoselectively starting from ethylenedioxy octalone derivative (II, X = H2). The present synthetic study demonstrates unequivocally that the positions of ester groups of petasitolides should be located at C2- rather than C3- exposition.
THE REACTION OF DIARALKYLGLYCINES: PREPARATION AND CHEMISTRY OF N-CHLOROMETHYLDIBENZYLAMINE HYDROCHLORIDE
Authors: Kimura Masaru , Satake Kyosuke , Morosawa Shiro 
Published: July 2006

Abstract
N-Chloromethyldibenzylamine hydrochloride (2a), which is a precursor to N,N-dibenzylimminium salt (3), was obtained from N,N-dibenzylglycine hydrochloride (1a) in the presence of PCl5 or (COCl)2 in good yields. The reaction mechanism is discussed. 2a was isolated and reacted with dibenzylamine (6a), thiophene, n-buthyllithium and 1-naphthol to give an excellent yield of bis(N,N-dibenzylamino)methane (5a), 2-(N,N-dibenzylaminomethyl)thiophene (7), N-penthyldibenzylamine (8), and 2-dibenzylaminomethyl-1-naphthol (9), respectively.
THE FORM OF SULFIDE ON MOLYBDENUM OXIDE CATALYST
Authors: Sotani Noriyuki 
Published: July 2006

Abstract
Molybdenum oxide catalyst is sulfurized during the hydrodesulfurization reaction. The catalyst was studied by EMX and ESCA. Sulfur was mainly contained as MoS2. Mo/S mole ratio of the catalyst was 1.5–3.4 by ESCA and 5.7 by chemical analysis. This means that sulfide is mainly distributed on the surface or near the surface.
INTRAMOLECULAR CHARGE-TRANSFER INTERACTION BETWEEN LONE PAIR ELECTRONS AND π-ELECTRON SYSTEM
Authors: Mutai Kiyoshi , Kobayashi Keiji , Kobayashi Tsunetoshi , Utsunomiya Chikatoshi 
Published: July 2006

Abstract
As a model for detecting the intramolecular n-π type charge-transfer interaction, a homologous series of the compounds 3 was chosen and subjected to ultraviolet, fluorescence, and photoelectron spectroscopic study. The interaction was confirmed in the lower homologs of n=1, 2, and 3.
A GENERAL SYNTHESIS OF 4-HYDROXY-2-ALKYLCYCLOPENTENONES
Authors: Shono Tatsuya , Hamaguchi Hiroshi , Aoki Kei 
Published: July 2006

Abstract
The electrooxidation of t-butyl 2-furylacetate (2) yielded dimethoxy dihydrofuran (3), which was transformed by hydrolysis to 4-hydroxy-5-carbo-t-butoxycyclopentenone (4). The reaction of the cyclopentenone with alkyl halides, followed by the decarboxylation and rearrangement afforded the 4-hydroxy-2-alkylcyclopentenone (1), one of which was the PGE2 precursor.
RAPID PEPTIDE SYNTHESIS IN LIQUID PHASE. PREPARATION OF ANGIOTENSIN II AS AN EXAMPLE
Authors: Nozaki Sukekatsu , Kimura Atsuko , Muramatsu Ichiro 
Published: July 2006

Abstract
A rapid method of peptide synthesis is proposed. In this method a peptide chain is stepwise elongated in a water-immiscible organic solvent without isolation of the intermediates. Protected angiotensin II was prepared by the method in an overall yield of 74% in a short period of time.
A PHOTOREARRANGEMENT OF 6-METHYLENETRICYCLO[3.2.1.02,7]OCT-3-EN-8-ONE OXIME DERIVATIVES: DI-π-METHANE TYPE REARRANGEMENT INVOLVING AN OXIME MOIETY
Authors: Nitta Makoto , Inoue Osamu , Tada Masaru 
Published: July 2006

Abstract
6-Methylenetricyclo[3.2.1.02,7]oct-3-en-8-one oxime derivatives (Ia) and (Ib), upon irradiation, afforded 3-methylenetetracyclo[3.3.0.0.2,804,6]octan-8-one oxime derivatives (IIa), (IIIa) and (IIb), respectively. The photorearrangement leading to IIa and IIb were ascribed to a novel di-π-methane type rearrangement involving the oxime moiety.
HOMOGENEOUS HYDROGENATION OF ALDEHYDES TO ALCOHOLS CATALYZED BY RuCl2(PPh3)3
Authors: Tsuji Jiro , Suzuki Hirohisa 
Published: July 2006

Abstract
RuCl2(PPh3)3 was found to be a good catalyst for the hydrogenation of aliphatic aldehydes to alcohols under mild conditions. Aromatic aldehydes were reduced to benzyl alcohols without hydrogenolysis. Ketones and nitro groups were not reduced under the same conditions.
REDUCTION OF PYRIDINIUM AND CARBONYL COMPOUNDS BY REFLUXING SODIUM DITHIONITE SOLUTIONS
Authors: Minato Hiroshi , Fujie Shinichi , Okuma Kentaro , Kobayashi Michio 
Published: July 2006

Abstract
Sodium dithionite in refluxing MeOH–H2O was found to be an effective reducing agent for converting pyridinium ions to piperidines and carbonyl compounds to alcohols, respectively.
PHOTOLYSIS OF 2-AZA-3-ARYL-1,4-NAPHTHOQUINONES IN THE PRESENCE OF HYDROGEN DONORS
Authors: Maruyama Kazuhiro , Iwai Tatsuaki , Otsuki Tetsuo , Naruta Yoshinori , Miyagi Yo 
Published: July 2006

Abstract
Photochemical reaction of 2-aza-3-phenyl-1,4-naphthoquinone and two derivatives 4 with a variety of hydrogen donors was investigated. Depending on the nature of hydrogen donors, (i) addition products 1 of hydrogen donor to the carbon–nitrogen double bond, (ii) hydrogenation products 2 of the (Remark: Graphics omitted.)C=N– double bond, and (iii) ring contracted addition products 3 were obtained, but their yields are not of satisfactory.
ELECTROCATALYTIC BEHAVIOR OF TETRASULFONATED METAL PHTHALOCYANINES IN THE REDUCTION OF CARBON DIOXIDE
Authors: Hiratsuka Kazuya , Takahashi Katsuhiro , Sasaki Hideo , Toshima Shinobu 
Published: July 2006

Abstract
In the electroreduction of carbon dioxide, catalytic activities of the tetrasulfonated metal phthalocyanines(MeTSP) homogeneously dissolved in the Clark–Lubs buffer solutions were investigated by the measurements of current- and capacitance-potential curves. It was found that CoTSP and NiTSP were active but not CuTSP and FeTSP.
PREPARATION OF POLYPEPTIDE MODEL FOR VISUAL PIGMENTS
Authors: Nanasawa Masato , Kamogawa Hiroyoshi 
Published: July 2006

Abstract
Schiff base(SB) of apocarotenal and copolypeptide (γ-methyl-l-glutamate and l-lysine) was prepared for the purpose of simulating visual pigments. The charge transfer(CT) complexes of conjugated side chains of the resulting polypeptide-SB were formed with various electron acceptors, bringing about a 120-nm shift of absorption band as recoginized in rhodopsin.
NMR AND CD SPECTRAL STUDIES OF CONFORMATIONAL ISOMERS OF ISOLIGULARONE AND FUKINONE, NATURALLY OCCURRING cis-DECALIN DERIVATIVES
Authors: Sato Toshichika , Tada Masahiro , Takahashi Takeyoshi , Horibe Isao , Ishii Hiroshi , Iwata Tatsuo , Kuriyama Kaoru , Tamura Youko , Tori Kazuo 
Published: July 2006

Abstract
NMR and CD spectroscopic evidence showed that cis-decalin types of sesquiterpenic ketones, isoligularone (2) and fukinone (3), predominantly adopt “steroid-like” conformations in solution in contrast with ligularone (1) which prefers the “non-steroid-like” one. 13C NMR signal assignments and anomalies in the CD of the furanoketones are also reported.
PHOTOCHEMICAL REACTIONS OF 3-PHENYL-2-ISOXAZOLINES FUSED WITH CYCLOALKANE RING
Authors: Seshimoto Osamu , Kumagai Tsutomu , Shimizu Kazuo , Mukai Toshio 
Published: July 2006

Abstract
In order to clarify the initial stage of the photoexcitation of the rigid Ph–C=N–O system, the photochemistry of several 2-isoxazolines possessing fused cycloalkane ring has been investigated. Several photoproducts such as 2H-azirine, cyclic enamine aldehydes, bicyclic oxazolines were isolated, and a generalized pattern of the photoreaction which is initiated by the N–O bond fission is proposed.
PRESSURE-VOLUME-TEMPERATURE RELATIONS IN THE LIQUID CRYSTAL OF p-PENTOXYBENZILIDENE-p-n-BUTYLANILINE
Authors: Hanawa Chikayoshi , Shirakawa Toshiaki , Tokuda Taneki 
Published: July 2006

Abstract
Pressure-volume-temperature relationships were determined using the piston-cylinder methods for a liquid crystal, p-pentoxybenzilidene-p-n-butylaniline. For the nematic state, the intermolecular potential was found to be dependent on 3.6 powers of the density.
PERMANGANATE-OXIDATION OF PEPTIDES. I. THE OXIDATION OF PROLINE RESIDUE IN N-PROTECTED PROLINE TO PYROGLUTAMYL RESIDUE
Authors: Muramatsu Ichiro , Motoki Yoshiaki , Yabuuchi Kimihiro , Komachi Hiroshi 
Published: July 2006

Abstract
The oxidation of N-protected proline and related compounds with permanganate was investigated. The proline residue in N-acyl-l-proline was readily oxidized in the presence of strong acid to pyroglutamyl residue, in a manner different from that of free proline. In the oxidation of Nδ-benzyloxycarbonyl-l-ornithine under the same conditions, the methylene group adjacent to the protected δ-amino nitrogen was also attacked.
PHOTOELECTROCHEMICAL STUDY OF REVERSIBLE CHARGE SEPARATION IN HYDRATED MAGNESIUM PORPHYRIN AGGREGATES
Authors: Yamamura Takeshi , Umezawa Yoshio 
Published: July 2006

Abstract
A reversible photogalvanic effect was observed with a Pt electrode coated with an aggregate of a hydrated magnesium porphyrin. Quantum efficiencies at each wavelength were obtained from the spectral dependence of the photocurrent. A charge separation responsible for the observed photocurrent was discussed comparatively with the chlorophyll system.
CROWN ETHERS IN ORGANIC SYNTHESIS. II. CATALYTIC DEHYDRATION OF ALDOXIMES
Authors: Rasmussen Jerald K 
Published: July 2006

Abstract
Phase transfer (crown ether or quaternary ammonium salt) catalyzed reaction of benzaldoxime with potassium salts (cyanide or halide) produces a 3:1 mixture of benzonitrile and benzamide. A base-catalyzed mechanism is proposed. Extension of the procedure to provide a general, one-pot conversion of aldehydes to nitriles is indicated.
REVERSIBLE HYDRIDE TRANSFER FROM 1-METHYL-1,4-DIHYDRONICOTINAMIDE (1,4-MeNDH) TO MeND+ IODIDE YIELDING 1,6-MeNDH
Authors: Minato Hiroshi , Ito Takao , Kobayashi Michio 
Published: July 2006

Abstract
The reaction of 1-methyl-1,4-dihydronicotinamide (1,4-MeNDH) with MeND+ in D2O at 34°C was found to yield 1,6-MeNDH, and the reaction of 1,6-MeNDH with MeND+ was found to yield 1,4-MeNDH. An equilibrium was established between 1,6-MeNDH(18%) and 1,4-MeNDH(82%) when either of the 1-methyldihydronicotinamides was mixed with a catalytic amount of MeND+.
POPCORN POLYMERIZATION OF 3,5-DIMETHYLSTYRENE
Authors: Yamamoto Seika , Tatsumi Masakazu 
Published: July 2006

Abstract
Occurrence of popcorn polymerization in 3,5-dimethylstyrene (DMS) without any seed was found. Methyl methacrylate (MMA) and methyl acrylate (MA), in which small amounts of DMS popcorn polymer were employed as a seed, caused popcorn polymerization.