bluuebunny/crossref_metadata_2025_split huggingface dataset:
A CONVENIENT METHOD FOR THE PREPARATION OF THE ACYLATED MACROLIDE ANTIBIOTIC MIDECAMYCIN USING MOLECULAR SIEVES AND ACYLCHLORIDE
Authors: Nakamura Takeshi , Fukatsu Shunzo , Seki Shigeo , Niida Taro 
Published: July 2006

Abstract
The attempted direct acylation with acylchloride of an unreactive tertiary hydroxyl group at C-3″ in midecamycin in the presence of molecular sieves gave the corresponding 3″-acyl derivative under mild conditions without known 4″→3″ acyl shift.
SKELETAL TRANSFORMATIONS OF CIS-BICYCLO[4.2.0]OCT-2-YL SYSTEM
Authors: Hayano Kiyoharu , Ohfune Yasufumi , Shirahama Haruhisa , Matsumoto Takeshi 
Published: July 2006

Abstract
On treatment with HCO2H at 0 °C, isomeric 2,4,4,6-tetramethyl-cis-bicyclo[4.2.0]octan-2-ols gave rise to 1,2,7,7-tetramethyl-cis-bicyclo[3.3.0]oct-2-ene and 1,5,7,7-tetramethyl-cis,cis-1,4-cyclooctadiene, through new modes of skeletal transformation, together with a bicyclo[3.2.1]octane derivative. Mechanisms and biosynthetic significance of the new transformations are discussed.
ELECTRONIC SPECTRA OF 1,3-BIS(N-CARBAZOLYL)PROPANE IN THE AMORPHOUS STATE
Authors: Itaya Akira , Okamoto Ken-ichi , Kusabayashi Shigekazu 
Published: July 2006

Abstract
An amorphous-state film of 1,3-bis(N-carbazolyl)propane(DCzP) was prepared by a solvent-evaporation technique of the solution, and the absorption and fluorescence spectra were measured in air at room temperature. The spectra were compared with those of glassy-state DCzP, polycrystalline DCzP, polycrystalline N-isopropylcarbazole, and amorphous poly(N-vinylcarbazole) films. The fluorescence spectrum is composed of three components; monomer-like, second excimer, and sandwich-like excimer fluorescences.
LEWIS ACID CATALYZED CYCLOADDITION REACTIONS OF 2,3-HOMOTROPONE WITH DIENES: [4π+2π] AND [3C(2π)+4π] CYCLOADDITIONS
Authors: Oda Masaji , Ito Yoshinobu 
Published: July 2006

Abstract
In the presence of Lewis acids, 2,3-homotropone 1 smoothly undergoes cycloaddition reactions with cyclopentadiene and butadiene in [4π+2π] fashion with “inverse electron demand,” the dienes acting as dienophiles. With anthracene, however, 1 yields a [3C(2π)+4π] cycloadduct probably via 2-oxyhomotropylium cation.
REACTIONS OF ORGANOALUMINATES WITH COPPER(II) ACETATE IN THE ABSENCE OR IN THE PRESENCE OF CARBON MONOXIDE. A CONVENIENT METHOD FOR CONVERSION OF OLEFINS INTO THEIR SATURATED DIMERS OR KETONES
Authors: Sato Fumie , Mori Yoshikuni , Sato Masao 
Published: July 2006

Abstract
Hydroalumination of olefins with lithium alurinum hydride followed by treatment with copper(II) acetate results in the formation of the coupled products. When the reaction of organoaluminates with copper(II) acetate is carried out under a carbon monoxide atmosphere, ketones are obtained, suggesting the formation of an alkyl-copper intermediate in this reaction. This new development provides a convenient method for the conversion of clefin derivatives into their dimers or ketones.
HIYODORILACTONES A AND B, NEW TUMOR INHIBITORY GERMACRADIENOLIDES FROM EUPATORIUM SACHALINENSE MAKINO
Authors: Takahashi Takeyoshi , Eto Hirosumi , Ichimura Tomcko , Murae Tatsushi 
Published: July 2006

Abstract
Three new sesquiterpene lactones belonging to the class of [1(10)E,4Z]-germacra-1(10),4-dienolide have been isolated from the leaves of Eupatorium sachalinense Makino, two of them (hiyodorilactones A and B) were found to show significant inhibitory activity in vivo against the Ehrlich ascites carcinoma. The structures of hiyodorilactones A, B, and C have been established to be 1, 2, and 3, respectively.
PREPARATION OF 1-HYDROXY-2-AMINOETHYLPHOSPHONIC ACID AND ITS ALKYL-SUBSTITUTED DERIVATIVES
Authors: Tone Tsutomu , Okamoto Yoshiki , Sakurai Hiroshi 
Published: July 2006

Abstract
1-Hydroxy-2-aminoethylphosphonic acid, a substance of biochemical interest, and its alkyl-substituted derivatives were prepared for the first time by the reaction of N-(2-oxoethyl)phthalimide and dimethyl phosphite in the presence of base.
FIRST AND SECOND C.M.C. OF PHOSPHATIDYLCHOLINE IN CHLOROFORM
Authors: Ueno Masaharu , Kitada Ruriko , Kishimoto Hiroshi 
Published: July 2006

Abstract
Synthetic phosphatidylcholine possesses the first and second c.m.c. in chloroform. The disagreement among c.m.c. values obtained from various methods was due to the fact that different methods detect different c.m.c., i.e. the first and second c.m.c. and the intermediate values. The average association number of first micelle was 2 and that of second micelle was 4.
DETERMINATION OF THE NUMBER OF V5+=O SPECIES ON THE SURFACE OF VANADIUM OXIDE CATALYST
Authors: Miyamoto Akira , Yamazaki Yutaka , Inomata Makoto , Murakami Yuichi 
Published: July 2006

Abstract
The number of V5+=O species on the surface of V2O5 was determined by detecting the concentration profile of N2 produced by the NO–NH3 reaction on V2O5 using the rectangular pulse technique. The quantity of V5+=O species on the surface obtained agreed with the BET surface area of the catalyst.
THE EFFECT OF EXTERNAL MAGNETIC FIELD ON THE PHOTOCHEMICAL REACTION OF ISOQUINOLINE N-OXIDE AND 2-CYANOQUINOLINE N-OXIDE
Authors: Hata Norisuke 
Published: July 2006

Abstract
It was proved that in the photochemical reaction of quinoline N-oxides or isoquinoline N-oxides Process I (N-oxide → lactam) undergoes an external magnetic field effect, but Process II (N-oxide → oxazepine) does not. The magnetic field effect appears to be explained by assuming as the primary step of Process I the formation of an excited radical-ion pair.
GAS PHASE REACTION OF N2O5WITH PROPYLENE
Authors: Hoshino Mikio , Ogata Takayuki , Akimoto Hajime , Inoue Gen , Sakamaki Fumio , Okuda Michio 
Published: July 2006

Abstract
Products of gas phase reaction of N2O5 with propylene in air were analyzed using a long-path Fourier transform infrared spectrometer and a GC-EI and CI mass spectrometer. The major products was propylene glycol 1,2-dinitrate (PGDN), and other products were acetaldehyde, propylene oxide, NO2, and HNO3. Formation of PGDN observed previously in the photooxidation of the propylene-nitrogen oxides-air system was attributed to the reaction of N2O5 with propylene.
OXYGEN-17 NMR CHEMICAL SHIFTS OF ALCOHOLS, ETHERS AND ESTERS
Authors: Sugawara Tadashi , Kawada Yuzo , Iwamura Hiizu 
Published: July 2006

Abstract
The 17O NMR chemical shifts of alcohols, ethers and esters have been determined in natural abundance at 10.8 MHz. As the alkyl groups are changed, shielding of oxygen atoms decreases in the order: primary &lt; secondary &lt; tertiary. The downfield shifts which nicely parallel the lowering of the ionization potentials of alcohols and ethers demonstrate the importance of the paramagnetic screening term in the 17O shifts of these compounds.
A NEW SYNTHESIS OF 6,9α-THIAPROSTACYCLIN
Authors: Shimoji Katsuichi , Arai Yoshinobu , Hayashi Masaki 
Published: July 2006

Abstract
6,9α-Thiaprostacyclin (2a) and its methyl ester (2b) were synthesized using intramolecular cyclization of the acetylenic mercaptide 6 under the basic condition.
DETERMINATION OF BARIUM IN THE PRESENCE OF A LARGE AMOUNT OF CALCIUM BY MEANS OF THE COMBINATION OF THE SOLVENT EXTRACTION BY 18-CROWN-6 WITH THE ATOMIC ABSORPTION SPECTROPHOTOMETRY
Authors: Takeda Yasuyuki , Suzuki Shoji , Ohyagi Yoshihiko 
Published: July 2006

Abstract
A small amount of barium (2.0×10−5-5.00×10−4M) in the presence of a large amount of calcium (5.00×10−2M) was easily and precisely determined by means of the combination of the solvent extraction procedure by 18-crown-6 with the atomic absorption spectrophotometry using the dinitrogen oxide-acetylene flame. Average recovery of barium was 100±3%.
A SYNTHESIS OF (±)-IRIDOMYRMECIN FROM THE BIOGENETIC PRECURSOR
Authors: Yamada Yasuji , Sanjoh Hidenao , Iguchi Kazuo 
Published: July 2006

Abstract
The synthesis of (±) - iridomyrmecin (1) was accomplished from the cyclization products (3) of geraniol (2) via intermediates (4)–(8). This provides a synthesis of 1 from geraniol which is recognized as the biogenetic precursor of cyclopentano-monoterpenes.
13C NMR STUDY OF 1,3,4,6-TETRAAZA-6a(SIV)THIAPENTALENIUM TETRAFLUOROBORATE AND REFERENCE PRECURSOR, 5-(1-IMINOETHYLMETHYLAMINO)-3-METHYL-1,2,4-THIADIAZOLE
Authors: Akiba Kin-ya , Arai Shin-ichi , Inamoto Naoki , Yamada Koh-ichi , Tanaka Hisao , Kawazura Hiroshi 
Published: July 2006

Abstract
13C Chemical shifts of 1,2,3,5,6-pentamethyl-1,3,4,6-tetraaza-6a(SIV)thiapentalenium tetrafluoroborate and a reference precursor, 5-(1-iminoethylmethylamino)-3-methyl-1,2,4-thiadiazole, were assigned by comparison with their derivatives. Chemical shifts of all the carbons of the former lie at upfield to those of the latter.
SYNTHESIS OF PROSTAGLANDIN ANALOGS II. THE MODIFICATION OF ω-CHAIN
Authors: Miyake Hajimu , Tanouchi Tadao , Yamato Takashi , Okada Takanori , Konishi Yoshitaka , Wakatsuka Hirohisa , Kori Seiji , Hayashi Masaki 
Published: July 2006

Abstract
Many kinds of prostaglandin analogs, which are modified at the ω-chain and also unavailable by other methods, are synthesized simply by the reaction of the versatile aldehydes 1a, 1a, 1c, and 1d with nucleophilic reagents.
BASE-CATALYZED SKELETAL ISOMERIZATION OF 6-ENDO-HYDROXY-9-THIABICYCLO[3.3.1]NONA-3,7-DIEN-2-ONE WITH THE EPIMERIZATION OF THE HYDROXY GROUP
Authors: Miyashi Tsutomu , Suto Nobukazu , Mukai Toshio 
Published: July 2006

Abstract
Studies on the base-catalyzed skeletal isomerizatici of (4) to (5) and (6) and the base-catalyzed epimerization of the hydroxy group in (5) and (6) are reported. The most plausible mechanism for the skeletal isomerization of (4) and the epimerization in (5) and (6) involves retro-aldol cleavages of (4), (5) and (6) to give an enolate (7) as the common intermediate.
SYNTHESIS OF THE MERRIFIELD RESIN ESTERS OF N-PROTECTED AMINO ACIDS WITH THE AID OF HYDROGEN BONDING1
Authors: Horiki Kusuo , Igano Ken’ichi , Inouye Ken 
Published: July 2006

Abstract
A synthesis of the Merrifield resin esters of N-protected amino acids was attempted with the aid of hydrogen-bonding property of fluoride ion with carboxylic acids to obtain the esters in satisfactory yields. This will provide an alternatively efficient and economical method for the preparation of the key intermediate of the solid phase peptide synthesis.
SUBSTITUENT EFFECTS ON C-13 CHEMICAL SHIFT OF SIDE-CHAIN CARBON ATOM IN SUBSTITUTED BENZENES. EFFECT OF HETERO-ATOM ON TRANSMISSION MECHANISM
Authors: Inamoto Naoki , Masuda Shozo 
Published: July 2006

Abstract
Side chain C-SCS of seventeen benzene derivatives having carbonyl group and hetero-atom in the transmission route were treated with our dual parameter equation [a(ι + bσR)], and the sign of the a values was explained in terms of conjugative and 1,3-through-space interactions and electronegativity combined with hyperconjugation of methyl group.
STEREOSELECTIVE SYNTHESIS OF 10-OXA-11-DEOXY-PROSTAGLANDIN E1
Authors: Tunemoto Daiei , Takahatake Yuriko , Kondo Kiyosi 
Published: July 2006

Abstract
Intramolecular carbenoid reaction of methyl trans,trans-2,4-decadienyl diazomalonate afforded a bicyclic lactone, from which 10-oxa-11-deoxy-prostaglandin E1 was synthesized stereoselectively in moderate overall yield, via regio- and stereoselective ring-opening reaction of cyclopropane moiety and [2,3]sigmatropic rearrangement of allylic sulfoxide.
SOLUBILITY OF CHLOROALKYL MERCURY(II) IN WATER
Authors: Tajima Kooji , Kai Fumiaki 
Published: July 2006

Abstract
The solubilities of chloromethyl mercury(II) (MMC) and chloroethyl mercury (II) (EMC) in water were determined at 20∼40 °C. The solubilities in mole fraction, χ2′ were given by the equations: logχ2(MMC)=−1059⁄T+0.176; logχ2(EMC)=−1048⁄T−0.612. For the process from solid to saturated aqueous solution, the thermodynamic parameters of MMC and EMC were obtained as follows: Δ\barH2(MMC)=4711 cal/mole; Δ\barS2(MMC)=15.8 e.u.; Δ\barH2(EMC)=4642 cal/mole; Δ\barS2(EMC)=15.6 e.u.
CATHODIC PHOTO-EFFECT AT CdS ELECTRODE IN AQUEOUS POLYSULFIDE SOLUTION
Authors: Minoura Hideki , Tsuiki Masayasu 
Published: July 2006

Abstract
In an aqueous polysulfide solution, a remarkable cathodic photocurrent was observed on the (000\bar1) face of a single crystal CdS electrode in addition to the usual anodic photocurrent. It can be presumed that this cathodic photocurrent is due to the reduction of polysulfide ion by the photo-generated electron and is associated with the presence of the surface states which are in the forbidden gap of CdS.
ENANTIOFACE-DIFFERENTIATING (ASYMMETRIC) ADDITION OF ALKYLLITHIUM TO ALDEHYDES BY USING (2S, 2′S)-2-HYDROXYMETHYL-1-[(1-METHYLPYRROLIDIN-2-YL)METHYL] PYRROLIDINE AS CHIRAL LIGAND
Authors: Mukaiyama Teruaki , Soai Kenso , Kobayashi Susumu 
Published: July 2006

Abstract
Optically active alcohols are produced in good optical yields by treating aromatic and aliphatic aldehydes with alkyllithium by using (2S, 2′S)-2-hydroxymethyl-1-[(1-methylpyrrolidin-2-yl)methyl]pyrrolidine as chiral ligand.
SIDE-CHAIN MONOCHLORINATION OF TOLUENES WITH SULFURYL CHLORIDE CATALYZED BY TETRAKIS(TRIPHENYLPHOSPHINE)PALLADIUM(0)
Authors: Matsumoto Hideyuki , Nakano Taichi , Kato Machiko , Nagai Yoichiro 
Published: July 2006

Abstract
In the presence of tetrakis(triphenylphosphine)palladium(0), sulfuryl chloride chlorination of toluenes resulted almost exclusively in monochlorination to afford the corresponding benzyl chlorides in good yields.
A SPIN LABELED CROWN ETHER (I). ESR STUDIES ON THE ALKALI METAL COMPLEXES OF TANOL DERIVATIVE OF BENZO-15-CROWN-5
Authors: Ishizu Kazuhiko , Kohama Hiroyuki , Mukai Kazuo 
Published: July 2006

Abstract
A TANOL derivative of benzo-15-crown-5 shown in the Fig. 1, was synthesized, and the complex formation between the spin labeled crown ether and the alkali metal isocyanate was studied by ESR technique. The potassium complex revealed a strong spin–spin interaction due to formation of the sandwiched dimer and the structure was investigated on the basis of the ESR parameters of the triplet cluster.
HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY OF CHLOROPHYLLS AND SOME OF THEIR DERIVATIVES
Authors: Yoshiura Masahiko , Iriyama Keiji , Shiraki Masaru 
Published: July 2006

Abstract
It has been developed a micro-scale high-performance liquid chromatographic method for qualitative analysis of chlorophylls and some of their derivatives. The method combines simplicity, sensitivity and reproducibility without degradation of chlorophylls and their derivatives.
DETECTION OF COMBUSTIBLE GASES WITH STABILIZED ZIRCONIA SENSOR
Authors: Shimizu Fumiko , Yamazoe Noboru , Seiyama Tetsuro 
Published: July 2006

Abstract
Calcia stabilized zirconia sensors can be used for detection of combustible gases contained in oxygen atmosphere. The sensitivity (e.m.f.) depends strongly on temperature and far exceeds the level expected from gas combustion at lower temperatures of 550∼600°C. It is strongly suggested that the high sensitivity is associated with the catalytic properties of the electrode metals used.
THE REVISED STRUCTURE OF FURANOFUKINOL, A CONSTITUENT FROM PETASITES JAPONICUS MAXIM. RHIZOMES
Authors: Naya Keizo , Makiyama Yasuo , Matsuura Takashi , Ii Nobuo , Nagano Hajime , Takahashi Takeyoshi 
Published: July 2006

Abstract
The structure of furanofukinol, a constituent of Petasites japonicus Maxim., proposed previously as 3α,6β-dihydroxyfuranoeremophilane (V-a) should be revised to 3α,6β-dihydroxyfuranoeremophilane (I) by the PMR study of 3-O-angeloyl-6-O-acetylfuranofukinol (VIII) and by the chemical conversion of furanofukinol to 3β-hydroxyeremophilanes (X-a,b). The structures of the two related sesquiterpenes, isolated from Farfugium hiberniflorum Kitam., must therefore be revised to 3β-angeloyloxy-6β-hydroxyfuranoeremophilane (VII) and 3β-angeloyloxy-6β-acetoxyfuranoeremophilane (VIII).
CARBON-13 NMR SPECTRAL ASSIGNMENTS OF CUCURBITACIN AGLYCONES
Authors: Yamada Yasuji , Hagiwara Kiyokazu , Iguchi Kazuo , Takahashi Yukiko , Suzuki Sukeji 
Published: July 2006

Abstract
Assignments of 13C signals of the several cucurbitacins (1)∼(7), most of which were isolated from Anagallis arvensis L. (Primulaceae), were performed and the general feature of the chemical shifts was described.
ACETYLATION OF TOLUENE WITH ACETYL CHLORIDE AND BROMIDE CATALYZED BY CALCINED IRON SULFATE ACTIVATED BY EXPOSING TO A MIXTURE OF BENZYL CHLORIDE AND TOLUENE
Authors: Hino Makoto , Arata Kazushi 
Published: July 2006

Abstract
The catalyst prepared by heating FeSO4 in air at 700 or 800°C, followed by exposing to benzyl chloride in toluene at 60°C showed high activity for the title reaction.
RAMAN SPECTRA OF ALIGNED THIN FILMS OF NEMATIC LIQUID CRYSTAL (MBBA)
Authors: Yamada Haruka , Yamamoto Yoichiro , Fukumura Keiji , Tamamushi Bun-ichi 
Published: July 2006

Abstract
The Raman spectra of thin films of a nematic liquid crystal, p-methoxybenzylidene-p′-n-butylaniline (MBBA), have been measured for the samples aligned on glass (or quartz) surface homogeneously and homeotropically, respectively. The results confirm the molecular arrangements suggested by the observation with a polarizing microscope. The intensity changes and polarization components of the Raman bands are useful for the vibrational assignments.
AN EFFICIENT PHOSPHORYLATION METHOD BY THE ACTIVATION OF ALCOHOL
Authors: Watanabe Yutaka , Mukaiyama Teruaki 
Published: July 2006

Abstract
The reaction of 2-alkyloxybenzoxazoles with diphenyl hydrogen phosphate proceeds smoothly to give the corresponding alkyl diphenyl phosphates in good yields. 2-Alkyloxybenzoxazoles can be readily prepared by treating the parent alcohols with 2-fluorobenzoxazole derived from 2-chlorobenzoxazole by the action of potassium fluoride.
BOROHYDRIDE REDUCTION OF METHYLENEANTHRONES: DETERMINATION OF SEQUENCE OF HYDRIDE ADDITION
Authors: Mitsuhashi Tsutomu , Oki Michinori 
Published: July 2006

Abstract
Derivatives of methyleneanthrone were reduced with sodium borohydride. While less crowded compounds were reduced both at the C=C and the C=O bonds, benzhydrylideneanthrone and tropylideneanthrone were initially reduced only at the C=O bond. The sequence of the two reductions is discussed on the ground of experimental results including deuterium labelling.
ASYMMETRIC ADSORPTION OF ALANINE AND ALANINE HYDROCHLORIDE BY QUARTZ FROM ETHANOL SOLUTION AT −80°C
Authors: Furuyama Shozo , Kimura Hiroko , Sawada Michio , Morimoto Tetsuo 
Published: July 2006

Abstract
It was found that the l-isomers of alanine and alanine hydrochloride were adsorbed preferentially by l,-quartz, while the d-isomers were adsorbed by d-quartz from ethanol solution at −80°C. The asymmetricity of adsorption fell in the range 1.3–2.2.
A NEW RING OPENING REACTION OF 2-FURALDEHYDE DIPHENYL DITHIOACETAL VIA REDUCTIVE SILYLATION. PREPARATION OF 2,3,4-TRIS(TRIMETHYLSILYL)-3-ALKENYL AND 3,4,4-TRIS(TRIMETHYLSILYL)-2-BUTENYL KETONES
Authors: Atsumi Kunio , Kuwajima Isao 
Published: July 2006

Abstract
5-Substituted 2-furaldehyde diphenyl dithioacetals are found to undergo facile ring-opening reaction and to give the corresponding polysilylated ketones when they were treated with metallic sodium in the presence of chlorotrimethylsilane.
INTRAMOLECULAR CYCLOADDITION PRODUCTS OF TETRAETHYL [3.3](1,4)NAPHTHALENO (9,10)ANTHRACENOPHANE- 2,2,15,15-TETRACARBOXYLATE AND TETRAETHYL [3.3]PARACYCLO(9,10)ANTHRACENOPHANE-2,2,11,11-TETRACARBOXYLATE
Authors: Shinmyozu Teruo , Inazu Takahiko , Yoshino Tamotsu 
Published: July 2006

Abstract
[3.3](1,4)Naphthaleno(9,10)anthracenophane derivative(3) was converted into the photoisomer(4) on exposure to light. The similar photochemical isomerization(7→8) was observed in the case of [3.3]paracyclo(9,10)anthracenophane derivative(7). Besides this, the isomer(6) due to the intramolecular Diels–Alder reaction was also formed by heating 7 at ca. 100°.
LIQUID TELLURIUM AS A CATALYST FOR THE DEHYDROGENATION OF SEVERAL POLYNUCLEAR HYDROCARBONS
Authors: Takahashi Katsumi , Ogino Yoshisada 
Published: July 2006

Abstract
Liquid tellurium has been found to catalyze selectively the dehydrogenation of certain polynuclear hydrocarbons, i.e. tetralin, indane, acenaphthene, 9,10-dihydroanthracene, 9,10-dihydrophenanthrene, 1,2,3,4,5,6,7,8-octahydrophenanthrene.
ACID-CATALYZED OLIGOMERIZATION BETWEEN 4-(1-ETHYL-1-PROPENYL)MORPHOLINE AND BENZYLIDENEANILINES. SYNTHESIS OF 1,2,3,4,7a,8-HEXAHYDRO-4-AZA-s-INDACENE DERIVATIVES
Authors: Nomura Yujiro , Kimura Muneaki , Takeuchi Yoshito , Tomoda Shuji 
Published: July 2006

Abstract
Reaction of 4-(1-ethyl-1-propenyl)morpholine with benzylideneanilines in acetic acid provided 1,2,4,6,7-pentaaryl-3,5,7a-trimethyl-1,2,3,4,7a,8-hexahydro-4-aza-s-indacene in decent yield. The reaction mechanism involving the conrotatory cyclization of an intermediate pentadienyl cation has been proposed.
A NEW METHOD FOR THE PREPARATION OF KETONES BY DECARBONYLATION OF α-HYDROXYCARBOXYLIC ACID WITH 2-CHLOROBENZOXAZOLIUM SALT
Authors: Mukaiyama Teruaki , Echigo Yoshiaki 
Published: July 2006

Abstract
Treatment of α-hydroxycarboxylic acids with 2-chloro-3-ethylbenzoxazolium tetrafluoroborate and triethylamine at room temperature affords ketones in good yields.
1-ARYLSULFINYL-1-ALKEN-1-YLLITHIUM
Authors: Okamura Hisashi , Mitsuhira Yoshiyuki , Miura Morikazu , Takei Hisashi 
Published: July 2006

Abstract
The generation of the title compound (2) by the treatment of alkenyl aryl sulfoxide (1) with lithium diisopropylamide (LDA), and the reactions of 2 with methyl iodide, carbonyl compounds, and oxiranes were described.
AN ELECTRON SPIN RESONANCE SPECTROSCOPIC INVESTIGATION OF N-SULFINYLAMINYLS
Authors: Miura Yozo , Nakamura Yuji , Kinoshita Masayoshi 
Published: July 2006

Abstract
N-Sulfinylaminyls (2) were generated from sulfinamides (1) by hydrogen-abstraction using t-butoxyls, and were investigated by ESR spectroscopy. The ESR parameters for 2 suggest that in 2 the most of the unpaired electron resides on the nitrogen and the N-phenyl ring, negligibly delocalizes onto the sulfinyl group.
A NEW APPROACH TO THE SYNTHESIS OF THIOPHENOPHANES. SYNTHESIS OF [n.1.1]PARACYCLO(2,5)THIOPHENOPARACYCLOPHANES
Authors: Miyahara Yuji , Inazu Takahiko , Yoshino Tamotu 
Published: July 2006

Abstract
A new method for the synthesis of thiophenophanes which consists of cyclization of bischloroacetyl compounds with sodium sulfide and condensation of the resulting keto sulfides with glyoxal was developed. As an application a series of [n.1.1]paracyclo(2,5)thiophenoparacyclophanes (n=3,4,5,6,7,8,10) were synthesized.
SYNTHESIS OF Nβ-METHYL-l-β-ARGININE, A COMPONENT AMINO ACID IN A NEW ANTIBIOTIC LL-BM547β
Authors: Nomoto Shinya , Shiba Tetsuo 
Published: July 2006

Abstract
First synthetic method for preparation of N-methyl guanidino β-amino acid was established. Thus, Nβ -methyl-l-β-arginine, a component of the antibiotic LL-BM547β, was synthesized from Nγ-t-butoxycarbonyl-Nα-tosyl-l-α,γ-diaminobutyric acid through a successive reaction of Nα-methylation of tosylamino group with diazomethane, the Arndt–Eistert synthesis, and guanidination of the ω-amino group. The synthetic product was identical with the natural amino acid with respect to a specific rotation and NMR spectrum.
A MECHANISM OF THE PHOTOCHEMICAL ISOMERIZATION OF QUINOLINE N-OXIDES
Authors: Hata Norisuke , Oguro Toshiyuki 
Published: July 2006

Abstract
The photochemical behavior of 2-cyanoquinoline N-oxide and 4-methylquinoline N-oxide in aqueous ethanol containing potassium iodide or ethyl iodide was examined. The results indicate that Process I (N-oxide → lactam) proceeds via a protonation of the N→O group through a hydrogen-bonding interaction in the S1 state, whereas Process II (N-oxide → oxazepine) occurs with the formation of oxaziridine intermediate from the S1 state.
ENANTIOFACE-DIFFERENTIATING (ASYMMETRIC) ADDITION OF DIALKYLMAGNESIUM TO ALDEHYDES BY USING THE LITHIUM SALT OF (2S, 2′S)-2-HYDROXYMETHYL-1-[(1-METHYLPYRPOLIDIN-2-YL)METHYL]PYRROLIDINE AS A CHIRAL LIGAND
Authors: Sato Toshio , Soai Kenso , Suzuki Keisuke , Mukaiyama Teruaki 
Published: July 2006

Abstract
Optically active alcohols possessing the R-configuration are produced in good optical yields by treating aromatic and aliphatic aldehydes with dialkylmagnesium by using the lithium salt of (2S, 2′S)-2-hydroxymethyl-1-[(1-methylpyrrolidin-2-yl)methyl]pyrrolidine as a chiral ligand.