bluuebunny/crossref_metadata_2025_split huggingface dataset:
ELECTROCHEMICAL PHOTOCELL USING Li DOPED CdS FILM ANODE
Authors: Tsuiki Masayasu , Minoura Hideki 
Published: July 2006

Abstract
The doping of Li in a sprayed CdS film electrode results in a significant increase in the anodic photocurrent at this electrode. The quantum yield for the electron flow at short-circuit current condition of the photocell using the Li doped CdS film anode amounts to 50% at wavelengths shorter than 480nm and is several times greater than that using an undoped CdS film anode.
REDOX-PHOTOSENSITIZED STEREOMUTATION OF 1-PHENOXYPROPENE; CATALYSIS BY THE CATION RADICAL OF AROMATIC HYDROCARBONS
Authors: Majima Tetsuro , Pac Chyongjin , Sakurai Hiroshi 
Published: July 2006

Abstract
The stereomutaion of 1-phenoxypropene occurred by the redox-photosensitization using aromatic hydrocarbon-dicyanobenzene-acetonitrile systems, giving rise to a photostationary mixture of the cis- and trans-isomers in 1:1-ratio. The combined quantum yields for the trans→cis and cis→trans isomerizations were over unity. The mechanism is discussed in terms of catalysis by the cation radical of aromatic hydrocarbons.
RETENTION OF pro-4R HYDROGEN ATOM OF MEVALONIC ACID IN BIOSYNTHESIS OF CYCLIC MONOTERPENOIDS. EVIDENCE FOR INDIRECT FORMATION OF cis-ISOPRENE UNIT FROM ISOPENTENYL AND DIMETHYLALLYL PYROPHOSPHATES
Authors: Suga Takayuki , Shishibori Tsuyoshi 
Published: July 2006

Abstract
The pro-4R hydrogen atom of mevalonic acid was preserved in perillaldehyde, carvone, menthol, and limonene biosynthesized from the mevalonic acid by higher plants. This is evidence that such a condensation of isopentenyl pyrophosphate with dimethylallyl pyrophosphate as directly giving rise to a cis-isoprene unit is not involved in the biosynthesis of cyclic monoterpenoids in higher plants.
THE STRUCTURE OF THE OXIDATION PRODUCT OF ACONITINE WITH NITRIC ACID
Authors: Amiya Takashi , Kanaiwa Yoshio , Bando Hideo , Nakano Naomi , Suginome Harusada 
Published: July 2006

Abstract
The structure of nitronitrosoaconitinic acid which is an oxidation product of aconitine with nitric acid was confirmed by spectroscopic methods. This compound was found to be a new type of acid having a pKa value comparable to that of carboxylic acids.
X-RAY PHOTOELECTRON SPECTROSCOPIC STUDY OF HIGHLY CONDUCTIVE IODINE-DOPED POLYACETYLENE
Authors: Ikemoto Isao , Sakairi Minoru , Tsutsumi Takayoshi , Kuroda Haruo , Harada Issei , Tasumi Mitsuo , Shirakawa Hideki , Ikeda Sakuji 
Published: July 2006

Abstract
The X-ray photoelectron spectra of iodine-doped polyacetylene (CHIx)n films are studied. By comparing with the results of Raman spectroscopy, it is concluded that iodine is more concentrated in the surface region than in the bulk when the amount of the doped iodine is small (i.e., x&lt;0.05). It is probable that in a heavily iodine-doped film, iodine is distributed more homogeneously throughout the film, and that a considerable amount of iodine in the surface region can be easily liberated when the film is kept in vacuum. The mole ratio of I5−/I3− is higher in the surface region than in the bulk.
SEPARATION AND CHARACTERIZATION OF SHORT-LIVED RADICALS IN Dl-METHIONINE AQUEOUS SOLUTION BY HIGH SPEED LIQUID CHROMATOGRAPH EQUIPPED WITH ESR SPECTROMETER
Authors: Makino Keisuke , Hatano Hiroyuki 
Published: July 2006

Abstract
Short-lived radicals produced in a Dl-methionine aqueous solution by γ-irradiation were converted into stable ones by spin-trapping, and they were separated and detected by a high speed liquid chromatograph equipped with an ESR spectrometer. The radicals separated in this way were characterized by a conventional ESR spectrometer. Consequently, the structures of four radicals were successfully identified.
ASYMMETRIC SYNTHESIS OF CYCLOPROPANES AND γ-BUTYROLACTONES BY THE REACTION OF DIMETHYLSULFOXONIUM METHYLIDE WITH (E)-(2R,3S)-6-ALKYLIDENE-3,4-DIMETHYL-2-PHENYLPERHYDRO-1,4-OXAZEPINE-5,7-DIONE
Authors: Mukaiyama Teruaki , Fujimoto Katsumi , Takeda Takeshi 
Published: July 2006

Abstract
Dihydrofuran and cyclopropane derivatives are produced by the reaction of (E)-(2R,3S)-6-alkylidene-3,4-dimethyl-2-phenylperhydro-l,4-oxazepine-5,7-diones with dimethylsulfoxonium methylide. The cyclopropane derivatives are hydrolyzed and esterified to give highly optically pure (&gt;90%e.e.) dimethyl 2-alkylcyclopropane-1,1-dicarboxylates. Highly optically pure (&gt;90%e.e.) 3-substituted γ-butyrolactones are obtained by the hydrolysis of the dihydrofuran derivatives.
REACTION OF AMIDOXIMES WITH DIPHENYLCYCLOPROPENONE. SYNTHESIS OF 2-ARYL-5,6-DIPHENYLPYRIMIDIN-4-ONES
Authors: Takahashi Masahiko , Watanabe Shin-ichi 
Published: July 2006

Abstract
The reaction of arylamidoximes with diphenylcyclopropenone in refluxing toluene gave 2-aryl-5,6-diphenylpyrimidin-4-ones in good yields.
REDUCTION OF β-SULFENYLATED α,β-UNSATURATED KETONES WITH NaBH4-METAL HALIDE
Authors: Nishio Takehiko , Omote Yoshimori 
Published: July 2006

Abstract
Reduction of β-sulfenylated α,β-unsaturated ketones (1) with sodium borohydride (NaBH4) in the presence of a catalytic amount of metal halide (CoCl2 or NiCl2) gave the saturated ketones (3). However, FeCl2, FeCl3, CuI, and CuCl2 showed no effect in the reduction of 1.
THE SYNTHESIS OF 5-SUBSTITUTED PYRROLO[4,3,2-de]ISOQUINOLINE DERIVATIVES
Authors: Somei Masanori , Yamada Fumio , Kaneko Chikara 
Published: July 2006

Abstract
5-Substituted pyrrolo[4,3,2-de]isoquinolines, suitable intermediates for the synthesis of both 3,4-disubstituted indoles and Ergot alkaloids, were prepared from readily available 2-methyl-5-nitroisoquinolinium iodide.
REACTION OF CARBON DIOXIDE WITH EPOXIDES IN THE PRESENCE OF PENTAVALENT ORGANOANTIMONY COMPOUNDS
Authors: Matsuda Haruo , Ninagawa Akira , Nomura Ryoki 
Published: July 2006

Abstract
The reaction of carbon dioxide(CO2) with epoxides in the presence of pentavalent organoantimony compounds gave corresponding cyclic carbonates as a product in almost quantitative yields even under mild conditions.
THE SYNTHESIS OF d-EVALOSE
Authors: Yoshimura Juji , Hong Namgi , Sato Ken-ichi 
Published: July 2006

Abstract
d-Evalose (1: 6-deoxy-3-C-methyl-d-mannose) was synthesized from methyl 3, 3′-anhydro-4, 6-O-benzylidene-3-C-hydroxymethyl-2-O-methyl-α-d-mannopyranoside (3) through five-step derivations, and the structure was confirmed by the conversion into d-nogaloside (8: methyl 6-deoxy-3-C-methyl-2,3,4-tri-O-methyl-α-d-mannopyranoside).
A NEW PEPTIDE SYNTHESIS USING 3-(SUCCINIMIDOXY)-1,2-BENZOISOTHIAZOLE-1,1-DIOXIDE. APPLICATION TO SYNTHESIS OF LEUCINE-ENKEPHALIN
Authors: Inomata Katsuhiko , Kinoshita Hideki , Fukuda Hirohiko , Miyano Osamu , Yamashiro Yoshihiro , Kotake Hiroshi 
Published: July 2006

Abstract
3-(Succinimidoxy)-l,2-benzoisothiazole-l,1-dioxide was found to be a useful reagent to convert the carboxylic acids to the corresponding N-hydroxysuccinimide esters. Various dipeptides and leucine-enkephalin were prepared using the reagent in good yields.
SYNTHESIS OF 7-AMINOMETHYL-7-DEAZAGUANINE, ONE OF THE NUCLEOSIDE Q (QUEUOSINE) PRECURSORS FOR THE POST-TRANSCRIPTIONAL MODIFICATION OF tRNA
Authors: Ohgi Tadaaki , Kondo Tadao , Goto Toshio 
Published: July 2006

Abstract
7-Aminomethyl-7-deazaguanine, which is one of the precursors of nucleoside Q (queuosine) biosynthesis, was synthesized from 2-methylthio-6-methoxy-7-methyl-7-deazapurine in 13 steps.
ON THE STRUCTURES OF ADDUCTS BETWEEN 3-METHOXYCARBONYLMETHYLENE-2-OXOINDOLINE AND CYCLOPENTADIENE
Authors: Okada Kunisuke , Sakuma Hiroteru , Inoue Shoji 
Published: July 2006

Abstract
The structure and stereochemistry of the Diels–Alder adducts between 3-methoxycarbonylmethylene-2-oxoindoline and cyclopentadiene are discussed on the basis of the spectral and chemical data.
SYNTHESIS OF [3.3](1,1’) AND [5.5](1,1’)FERROCENOPHANE DERIVATIVES
Authors: Kasahara Akira , Izumi Taeko , Shimizu Iwao 
Published: July 2006

Abstract
[3.3](1,1’) and [5.5](1,1’)Ferrocenophane derivatives with one or two olefinic linkages and one carbonyl group between ferrocene systems were synthesized by intermolecularly base-catalyzed condensation. The transannular π-electronic interaction between the olefinic groups were examined on the basis of electronic spectra.
CATALYTIC ACTIVITY OF VARIOUS 12-MOLYBDOPHOSPHATES FOR METHACROLEIN OXIDATION
Authors: Eguchi Koichi , Aso Isao , Yamazoe Noboru , Seiyama Tetsuro 
Published: July 2006

Abstract
12-Molybdophosphoric acid and its salts were examined as catalysts for methacrolein oxidation. The catalytic activity was strongly dependent on the kind of counter ion, the highest activity being attained by Co(II) salt. The effect of counter ion was well expressed in terms of ionic potential.
SYNTHESIS OF as-INDACENEBIS(CYCLOPENTADIENYLIRON)
Authors: Iijima Sei’ichiro , Motoyama Izumi , Sano Hirotoshi 
Published: July 2006

Abstract
Iron(II) chloride reacts with a mixture of lithium cyclopentadienide and dilithium as-indacenide in tetrahydrofuran to give asindacenebis(cyclopentadienyliron) (1). The results of NMR and solubility studies of (1) indicate that (1) is one of the new analogues of biferrocene or cyclopentadienyl(indenyl)iron rather than that of bis(as-indacenyliron).
REGIO- AND STEREOSPECIFIC Z-IODO - AND Z-BROMOCHLORINATION OF ALKYLPHENYLACETYLENES VIA Z-CHLOROTELLURATION
Authors: Uemura Sakae , Miyoshi Haruo , Okano Masaya 
Published: July 2006

Abstract
Reaction of alkylphenylacetylenes with tellurium(IV) tetrachloride in carbon tetrachloride gives Z-(2-chlorovinyl)tellurium (IV) trichloride derivatives in over 75% yield, which afford the corresponding Z-chloroiodoalkenes or Z-bromochloroalkenes in good yields by halogenodetelluration with iodine in acetonitrile or N-bromosuccinimide in carbon tetrachloride.
SYNTHETIC UTILITY OF ALLYLIC THIOLCARBAMATES. STEREOSELECTIVE SYNTHESIS OF SIMPLE NATURAL PRODUCTS INCLUDING OPTICALLY ACTIVE MANICONE AND β-SINENSAL
Authors: Mimura Tetsuya , Kimura Yasuhiro , Nakai Takeshi 
Published: July 2006

Abstract
Stereoselective syntheses of the two optically active pheromones of ants, (+)-(E)-4,6-dimethyl-4-octen-3-one (manicone) and (+)-(E)-2,4-dimethyl-2-hexenoic acid, and of β-sinensal and (E)-β-farnesene are described in which allylic thiolcarbamates readily derived from allylic alcohols via the [3,3]sigmatropic rearrangement were used as the key intermediates.
A NEW METHOD FOR SEQUENCE DETERMINATION OF PEPTIDE MIXTURES BY EDMAN-DEGRADATION AND FIELD DESORPTION MASS SPECTROMETRY
Authors: Shimonishi Yasutsugu , Hong Yeong-Man , Matsuo Takekiyo , Katakuse Itsuo , Matsuda Hisashi 
Published: July 2006

Abstract
A new method is described for sequencing of peptide mixtures by Edman-degradation and field desorption mass spectrometry. The principle is realized by measurement of the mass numbers of molecular or quasi-molecular ions of peptides and their fragments degraded by the Edman method and calculation of the mass difference.
CONVERSION AND STORAGE OF LIGHT ENERGY. EVOLUTION OF HYDROGEN IN NEUTRAL AQUEOUS SOLUTION BY A CATALYTIC ELECTRODE PROCESS
Authors: Kawai Tomoji , Tanimura Katsumi , Sakata Tadayoshi 
Published: July 2006

Abstract
Hydrogen was evolved from water by the photoelectrochemical reduction of methylviologen (MV2+) and the catalytic electron transfer from reduced MV+. to H+ in neutral aqueous solution. Taking advantage of this process, reduction of water into H2 by using a Zinc-tetraphenylporphine (ZnTPP) photoelectrode is suggested.
SYNTHESIS OF [2]PARACYCLO[2]PARACYCLO[2](1,8)-NAPHTHALENOPHANE-9-ENE-1,17-DIYNE
Authors: Kasahara Akira , Izumi Taeko , Katou Takao 
Published: July 2006

Abstract
[2]Paracyclo[2]paracyclo[2](1,8)naphthalenophane derivative having transannular π-electronic interactions was synthesized.
MOLECULAR COMPLEX OF TETRABENZOYLBENZENE AND DIALLENE
Authors: Toda Fumio , Tanaka Koichi , Tsukada Harumichi , Shimanouchi Hirotaka , Sasada Yoshio 
Published: July 2006

Abstract
Stable 1:1 complex of tetrabenzoylbenzene (1,2,4,5-tetrabenzoyl-3,6-di-t-butylbenzene, 1) and diallene (meso-3,8-di-t-butyl-1,5,6,10-tetraphenyldeca-3,4,6,7-tetraene-1,9-diyne, 2) was isolated and its structure was studied by X-ray analysis.
RAMAN AND INFRARED SPECTROSCOPIC STUDIES ON CONFORMATIONAL POLYMORPHISM OF N-PROPYL ACETATE
Authors: Ogawa Yoshiki , Tasumi Mitsuo 
Published: July 2006

Abstract
The Raman and infrared spectra of n-propyl acetate were observed at low temperatures and the results were analysed on the basis of normal-coordinate calculations. In two crystal modifications the molecules assume different conformations, namely, the trans–gauche form with respect to the two axes CH3(CO)O–CH2–CH2CH3 in Crystal I and the trans–trans form in Crystal II.
ETUDE DE LA CONDUCTION IONIQUE D’APATITES CONTENANT L’ION (ReO5)3− : Ba5(ReO5)3X (X=F, Cl, Br)
Authors: Besse Jean-Pierre , Baud Gilbert , Chevalier Raymond 
Published: July 2006

Abstract
The anionic conductivity of new halogenoapatites Ba5(ReO5)3X (X = F, Cl, Br) has been measured in the temperature range from 300°C to 700°C. The results are in good agreement with the coordination number and the size of mobile species.
THE REACTION OF α-IODOMERCURIC KETONES WITH NICKEL CARBONYL IN THE PRESENCE OF CARBONYL COMPOUNDS
Authors: Rhee Ilsong , Ryu Ilhyong , Omura Haruo , Murai Shinji , Sonoda Noboru 
Published: July 2006

Abstract
The reaction of a variety of α-iodomercuric ketones with nickel carbonyl was carried out in the presence of aldehydes or ketones to afford α,β-unsaturated ketones in good yields.
A SYNTHESIS OF 9(O)-METHANOPROSTACYCLIN
Authors: Konishi Yoshitaka , Kawamura Masanori , Arai Yoshinobu , Hayashi Masaki 
Published: July 2006

Abstract
The optically active 9(O)-methanoprostacyclin was synthesized from 1-2-oxa-3-oxo-6-syn-benzyloxymethyl-7-anti-(2-tetrahydropyranyloxy)-cis-bicyclo[3.3.0]octane or d-(2β-benzyloxymethyl-3α-hydroxy-4-cyclopenten-1α-y1)acetic acid, which are the general synthetic intermediates for natural prostaglandins.
TETRAMERS AS INTERMEDIATES IN SPECIFIC OXIDATION OF A PAIR OF ASSOCIATING THIOLS
Authors: Endo Tadashi , Takeda Yukiko , Orii Toyohiko , Kaneko Yuji , Kondo Michio 
Published: July 2006

Abstract
Tetramers composed of the associating thiols (1 and 2) were suggested to be intermediates in the specific oxidation of a 1:1 mixture of 1 and 2, based on spectroscopic studies, the behavior of the selectivity in this oxidation, the determination of degree of association, and so on.
ISOLATION AND STRUCTURES OF TWO NEW PYRAZINES, PALYTHAZINE AND ISOPALYTHAZINE FROM PALYTHOA TUBERCULOSA
Authors: Uemura Daisuke , Toya Yoshiaki , Watanabe Ichiro , Hirata Yoshimasa 
Published: July 2006

Abstract
Two new compounds possessing a pyrazine ring system were isolated from the zoanthid Palythoa tuberculosa. These compounds have now been named palythazine and isopalythazine and assigned to structures 1 and 2, respectively, by means of spectral analysis and synthesis.
HIGH-CONDUCTIVITY SOLID PROTON CONDUCTORS: DODECAMOLYBDOPHOSPHORIC ACID AND DODECATUNGSTOPHOSPHORIC ACID CRYSTALS
Authors: Nakamura Osamu , Kodama Teruo , Ogino Isao , Miyake Yoshizo 
Published: July 2006

Abstract
The electrical conductivities of dodecamolybdophosphoric acid H3Mo12PO40·29H2O and dodecatungstophosphoric acid H3W12PO40·29H2O crystals were measured. Remarkably high conductivities of 0.18 and 0.17 mho cm−1 at 25°C, and low activation energies of 15.5 and 13.7 kJ/mol were observed for the former and the latter, respectively.
PREPARATION AND SYNTHETIC UTILITY OF DIFLUOROKETENE THIOACETAL. A NOVEL SYNTHETIC ROUTE TOα-MONOFLUOROALKANOIC ACIDS
Authors: Tanaka Kiyoshi , Nakai Takeshi , Ishikawa Nobuo 
Published: July 2006

Abstract
Difluoroketene thioacetal (2) prepared from trifluoroacetaldehyde thioacetal (3) with lithium diisopropylamide or alkyllithiums has been shown to be useful as a building block for the preparation of α-monofluoroalkanoic acids (5), which involves the reaction of 2 with various organometallic compounds followed by hydrolysis of the resulting monofluoroketene thioacetal (4).
PREPARATION AND CYCLOADDITION REACTION OF 1-AMINO-2-AZABUTADIENE
Authors: Nomura Yujiro , Takeuchi Yoshito , Tomoda Shuji , Ito Masato M 
Published: July 2006

Abstract
2-Methyl-N-(1-phenylvinyl)-1-(1-pyrrolidinyl)-1-propanimine (1), a new type of 2-azabutadiene, was readily prepared by thermolysis of 5,5-dimethyl-3-(1-phenylvinyl)-4-(1-pyrrolidinyl)-Δ1-1,2,3-triazoline. Regioselective [4+2] cycloaddition reaction of 1 with some dienophiles afforded 2-isopropyl-6-phenylpyridine derivatives in decent yields.
FIRST SYNTHESIS OF PYRIDO[1′,2′:1,5]PYRAZOLO[3,4-b]PYRIDINE DERIVATIVE
Authors: Kakehi Akikazu , Ito Suketaka , Watanabe Kozo , Ono Tadashi , Miyazima Tomio 
Published: July 2006

Abstract
The treatment of 3-[2-cyano-2-(ethoxycarbonyl)ethenyl]-2-(ethylamino)pyrazolo[1,5-a]pyridine, obtainable from the reaction of the corresponding pyridinium salt with ethyl ethoxymethylenecyanoacetate in the presence of potassium carbonate, with strong base such as potassium t-butoxide gave a new condensed pyrazolopyridine derivative.
REDUCTION OF CARBONYL SUBSTRATES BY 3-CARBOXY-N-BENZYL-1,4-DIHYDROQUINOLINE: BIFUNCTIONALITY IN THE GENERAL-ACID CATALYZED NADH MODEL REDUCTION
Authors: Shinkai Seiji , Nakano Tetsuya , Hamada Hisatake , Kusano Yumiko , Manabe Osamu 
Published: July 2006

Abstract
The title NADH analogue acts as a bifunctional reducing reagent under appropriate reaction conditions. The remarkable efficiency of the intramolecular carboxyl group as general-acid was demonstrated.
SYNTHESIS OF 15,17-METHYLENE-PROSTAGLANDINS
Authors: Niwa Haruki , Kurono Masayasu 
Published: July 2006

Abstract
20-Methyl-15,17-methylene-prostaglandin F2α and E2 methyl ester (1 and 2) and 15,17-methylene-17-phenoxy-ω-trinor-prostaglandin F2α methyl ester (3) were synthesized via pyrolysis of β-hydroxy sulfoxides obtained by the coupling reaction of 3,7-dioxy-6-phenylsulfinylmethyl-2-oxabicyclo-[3,3,0]-octane derivative (10) with 3-butylcyclobutanone and 3-phenoxycyclobutanone respectively.
CARBON-13 NUCLEAR MAGNETIC RESONANCE SPECTRUM OF COLCHICINE: A REASSIGNMENT
Authors: Blade-Font Artur , Muller Robert , Elguero José , Faure Robert , Vincent Emile-Jean 
Published: July 2006

Abstract
A new NMR signal assignment of the twenty-two carbon atoms of colchicine is proposed that differs considerably from that of Singh, Palmar, Stenberg and Farnum [Spectroscopy Letters, 10, 1001 (1977)]. Some reasons of those discrepancies are analyzed.
BIOSYNTHESIS OF MONOTERPENOIDS IN HIGHER PLANTS. LOCALIZATION OF RADIOACTIVITY IN FAVOR OF THE ISOPENTENYL PYROPHOSPHATE-DERIVED MOIETY OF MONOTERPENOIDS IN THE UPTAKE OF ALANINE-2-14C
Authors: Tange Keiji , Hirata Toshifumi , Suga Takayuki 
Published: July 2006

Abstract
Uptake of Dl-alanine-2-14C to the twigs of Cinnamomum Camphora Sieb. and Pelargonium roseum Bourbon resulted in the preferential location of radioactivity on the isopentenyl pyrophosphate-derived moiety of linalool, geraniol, and citronellol, in opposition to incorporations of leucine and valine into these monoterpenoids. The biosynthetic pathway of the monoterpenoids from the amino acid is discussed.
ANODIC CHLORINATION AND BROMINATION OF 3-SUBSTITUTED SYDNONE COMPOUNDS
Authors: Tien Hsien-Ju , Nonaka Tsutomu , Sekine Taro 
Published: July 2006

Abstract
Anodic halogenation of 3-substituted sydnones was investigated using a platinum electrode in methanol containing halide ions from a synthetic aspect. The chlorination as well as the bromination did take place at the 4-position of sydnones in high yields rather than those in chemical procedures, while the fluorination and the iodination were unsuccessful.
SEVEN-MEMBERED HETEROCYCLES FROM F-2-METHYL-2-PENTENE AND ORTHO-BIFUNCTIONAL BENZENES
Authors: Maruta Masamichi , Kitazume Tomoya , Kubota Satoshi , Yoshimura Narihiko , Ishikawa Nobuo 
Published: July 2006

Abstract
4-Fluoro-2-(F-ethyl)-3-(F-methyl)-1,5-benzoxazepine (2) was prepared by a simple reaction of F-2-methyl-2-pentene (1) with 2-aminophenol in the presence of triethylamine in diethyl ether. Catechol and o-phenylenediamine similarly reacted with 1 to give corresponding seven-membered heterocyles, i.e., 1,5-benzodioxepin and 1,5-benzodiazepin-2-one derivatives, respectively.
PARTIAL ASYMMETRIC TRANSFORMATION OF RACEMIC AMINO ACIDS USING COBALT(III) SCHIFF BASE COMPLEX OF l-MENTHYL β-(2-HYDROXYBENZOYL)PROPIONATE
Authors: Numata Yoshihiko , Okawa Hisashi , Kida Sigeo 
Published: July 2006

Abstract
Cobalt(III) complexes, [Co (l-mop=aa)2]−, where H2(l-mop=aa) denotes Schiff bases obtained from l-menthyl β-(2-hydroxybenzoyl)propionate and an amino acid (aa=gly, ala, val, leu), were prepared in solution and examined with absorption and circular dichroism spectra. It was shown that an asymmetry around the cobalt(III) was induced by the vicinal effect of l-menthyl group and that racemic amino acids were partially transformed to an optical isomer.
TOTAL SYNTHESIS OF RACEMIC FRULLANOLIDE
Authors: Kido Fusao , Maruta Riichiro , Tsutsumi Kentaro , Yoshikoshi Akira 
Published: July 2006

Abstract
2,4,5,5a,6,7,8,9a,9bα-Decahydro-9aβ-hydroxy-5aβ-methoxycarbonyl-9β-methyl-2-oxo-naphtho[1,2-b]furan, the major annulation product from 4-vinylfuran-2(5H)-one and 2-methoxycarbonyl-6-methylcyclohexanone, was transformed into racemic frullanolide.
THE COBALT CATALYZED REDUCTIONS USING CARBON MONOXIDE AND WATER. THE N-ALKYLATION OF MORPHOLINE BY CARBONYL COMPOUNDS
Authors: Sugi Yoshihiro , Matsuda Akio , Bando Ken-ichiro , Murata Kazuhisa 
Published: July 2006

Abstract
The cobalt carbonyl complex modified by α, ω-bis(diphenylphosphino) alkane (PCnP, n=2 or 3) was an effective catalyst for the N-alkylation of morpholine by carbonyl compounds, in which carbon monoxide and water were used in place of hydrogen. N-Methyl, N-isopropyl, and N-benzylmorpholines were obtained in excellent yields.
INDUCED CIRCULAR DICHROISM OF SUBSTITUTED BENZOPHENONES BY COMPLEXATION WITH CHIRAL CROWN ETHERS
Authors: Kaneko Osamu , Matsuura Norio , Kimura Keiichi , Shono Toshiyuki 
Published: July 2006

Abstract
Enhanced induced circular dichroism (ICD) was observed, using ionic benzophenone derivatives as guests and crown compounds containing chiral moieties as hosts. The strength of the ICD spectra was found to depend highly on the solvent polarity and temperature. In methanol–water mixtures the formation constant of crown complexes could be evaluated by the measurement of the ICD.
CROSSED ALDOL REACTION MEDIATED BY DIETHYLALUMINUM 2,2,6,6-TETRAMETHYLPIPERIDIDE (DATMP)
Authors: Nozaki Hitosi , Oshima Koichiro , Takai Kazuhiko , Ozawa Shuji 
Published: July 2006

Abstract
An efficient way of producing organoaluminum enolates of t-butyl acetate and of ketones is based on the title aluminum amide. Subsequent addition to a carbonyl moiety of various substrates affords the desired aldol adducts in fair to excellent yields.
A CONVENIENT SYNTHESIS OF 4-METHYL-2H-1-BENZOTHIOPYRAN-2-ONES (4-METHYLTHIOCOUMARINS)
Authors: Nakazumi Hiroyuki , Asada Akira , Kitao Teijiro 
Published: July 2006

Abstract
4-Methyl-2H-1-benzothiopyran-2-ones (4-methylthiocoumarins) were conveniently prepared by the reaction of S-phenyl 3-oxobutanethioates with aluminium chloride. The spectral characteristics of these compounds were summarized.
NEW SYNTHESIS OF SPIRO DIACYLOXYPHOSPHORANES
Authors: Kobayashi Shiro , Kobayashi Takatoshi , Saegusa Takeo 
Published: July 2006

Abstract
Spiro diacyloxyphosphorarnes (4) and (5) were prepared by single-step reactions of a cyclic acyl phosphonite (1) with α-keto acids (2) and with acrylic acid (3) or β-propiolactone.
M\ddotOSSBAUER SPECTRA OF IRON(II) HYDRIDE COMPLEXES WITH 1,2-BIS(DIPHENYLPHOSPHINO)ETHANE
Authors: Mori Gorô , Takashima Yoshimasa 
Published: July 2006

Abstract
Mössbauer parameters, δ and ΔE, for the known series of complexes, [FeHL(dppe)2][BPH4](dppe=1,2-bis(diphenylphosphino)ethane; L=CO, PhCH2NC, P(OMe)3, N2, etc.), and a new series of complexes, [FeHX(dppe)2] (X=CN−, NO2−, NCS−, NCO−, Cl−, etc.), were obtained. From these data in combination with i.r. data, the bonding properties of the ligands L and X are discussed.