bluuebunny/crossref_metadata_2025_split huggingface dataset:
AMMONIA SYNTHESIS OVER RHODIUM, IRIDIUM AND PLATINUM PROMOTED BY POTASSIUM
Authors: Aika Ken-ichi , Yamaguchi Jutaro , Ozaki Atsumu 
Published: July 2006

Abstract
Rhodium and Iridium on active carbon were found to be highly effective for ammonia synthesis when activated by potassium. Palladium appeared to be hardly activated, while platinum can be activated, by the addition of potassium. A characteristic activity pattern was found for the new catalyst system.
THE STEREOSELECTIVE PHOTOCYCLOADDITION OF INDENE AND PHENYL VINYL ETHER TO α-NAPHTHONITRILE
Authors: Pac Chyongjin , Mizuno Kazuhiko , Sugioka Taizo , Sakurai Hiroshi 
Published: July 2006

Abstract
The photoreactions of α-naphthonitrile with indene and phenyl vinyl ether afford 1-cyano-4,5;10,11-dibenzotricyclo[5.4.0.02,6]undeca-4,8,10-triene (I) and 1-cyano-8-phenoxy-2,3-benzobicyclo[4.2.0]octa-2,4-diene (IIa) as a single (2 + 2) cycloadduct respectively, which are shown to have an endo-configuration by the consideration of their NMR data.
A CONVENIENT SYNTHESIS OF SULFENYLATED ACTIVE METHYLENE COMPOUNDS USING DIARYL DISULFIDES
Authors: Fujisawa Tamotsu , Hata Kazumi , Kojima Takakazu 
Published: July 2006

Abstract
A novel preparation of sulfenylated active methylene compounds has been investigated by the reaction of diaryl disulfides with active methylene compounds in a basic media. Malonates, acetoacetate, acetylacetone, and malononitrile gave selectively the corresponding monosulfenylated compounds at room temperature. At elevated temperatures, only malononitrile afforded a disulfenylated compound, while reactions with other active methylene compounds resulted in decomposition of the monosulfenylated products.
CONFORMATION OF SEQUENTIAL POLYPEPTIDES OF l-VALINE IN SOLUTION
Authors: Katakai Ryoichi , Toda Fujio , Uno Keikichi , Iwakura Yoshio , Oya Masanao 
Published: July 2006

Abstract
CD study of a number of sequential polypeptides of l-valine with l-alanine and glycine has been done in a mixed solvent system of hexafluoro 2-propanol (HFIP)-trifluoro ethanol (TFE) in order to elucidate the conformation of poly(l-valine) in solution. The results suggested that poly(l-valine) cannot take the α-helical conformation in HFIP-TFE. A new CD pattern was observed on the sequential polypeptide of l-valine with glycine.
MECHANISM FOR THE FORMATION OF α-AMINONITRILES: INTERMEDIACY OF AN IMINE OR A CYANOHYDRIN
Authors: Walia Jasjit S , Bannore Sudhir N , Walia Amrik S , Guillot Larry 
Published: July 2006

Abstract
The reaction of benzaldehyde, 2-aminobenzenecarbothioamide, potassium cyanide, and acetic acid yields tetrahydroquinazolinethione 7 and/or α-aminonitrile 11 under different conditions. These results are used to support the intermediacy of an imine 3 or its immonium ion in the formation of α-aminonitriles 5.
ANODIC OXIDATION OF TRIALKYLBORANES USING GRAPHITE AS THE ANODE. NOVEL REACTION OF ORGANOBORANES PROCEEDING THROUGH A CARBONIUM ION MECHANISM
Authors: Taguchi Toru , Takahashi Yuzuru , Itoh Mitsuomi , Suzuki Akira 
Published: July 2006

Abstract
Trialkylboranes are readily electrolyzed by using graphite as an anode in a sodium perchlorate-methanol solution containing sodium methoxide or a sodium acetate-acetic acid solution to give corresponding alkyl methyl ethers or alkyl acetates in good yields, respectively.
CONSTITUTION AND SYNTHESIS OF NORANHYDROICARITIN AND ISOANHYDROICARITIN
Authors: Jain A C , Gupta R K 
Published: July 2006

Abstract
Kaempferol (1) when reacted with 2-hydroxy-2-methyl-3-butene in the presence of borontrifluoride etherate yielded a mixture of 6,8-di-(3-methylbut-2-enyl) derivative (2), 4″, 5″-dihydro-6″, 6″-dimethyl pyrano (2″,3″ : 7,8)-kaempferol (3) and 8-(3-methylbut-2-enyl) derivative (4). The orientation of alkenyl unit in compound 4 has been unambiguously established and then it agrees in direct comparison with natural noranhydroicaritin. 1Complete acetylation of 4, followed by reaction of 5 with one mole of methyl iodide in the presence of dry K2CO3 and acetone afforded 8-(3-methylbut-2-enyl)-rhamnocitrin triacetate (6) which on deacetylation finally gave natural isoanhydroicaritin 1(7).
THE HYDROLYSIS OF p-NITROPHENYL ACETATE BY POLYMER CATALYSTS CONTAINING HYDROXAMATE AND IMIDAZOLE FUNCTIONS
Authors: Kunitake Toyoki , Okahata Yoshio 
Published: July 2006

Abstract
The hydrolysis of p-nitrophenyl acetate by a polymer catalyst containing the hydroxamate and imidazole functions includes the formation of acetyl hydroxamate and its subsequent decomposition assisted by the intramolecular imidazole group. The overall catalytic efficiency is enhanced by the presence of these complementary nucleophilic functions.
REACTIONS OF 9-PHENYLTHIOXANTHENE 10-OXIDE WITH ORGANOMETALLIC REAGENTS
Authors: Hori Mikio , Kataoka Tadashi , Shimizu Hiroshi 
Published: July 2006

Abstract
It was proved that the reaction between 9-phenylthioxanthene 10-oxide (II) and organometallic reagents proceeds through the formation of 9-phenylthioxanthenyl radical. A new method of synthesis of thiaänthracene derivative was found by the reaction of II with aryllithium.
INTERACTION OF THIAMINE (VITAMIN B1) WITH 1,4-DIHYDRONICOTINAMIDE. REDUCTION OF IMINO GROUPS
Authors: Shinkai Seiji , Kunitake Toyoki 
Published: July 2006

Abstract
Thiamine (Vitamin B1) and its analogue, 3-methylbenzothiazolium iodide serve as suitable imine substrates for reduction by 1-benzyl-1,4-dihydropyridine, and the reduction of the imino group to amine occurs easily at room temperature.
SYNTHESIS OF 10-SUBSTITUTED 9-PHENYLTHIOXANTHENIUM SALTS AND THEIR REACTIONS WITH BASES
Authors: Hori Mikio , Kataoka Tadashi , Shimizu Hiroshi 
Published: July 2006

Abstract
Each of 10-(p-methoxyphenyl)- and 10-(n-propyl)-9-phenylthioxanthenium perchlorates (Ia and Ii) was separated into two geometrical isomers. Their conformations were discussed in some detail. The reactions of 10-substituted 9-phenylthioxanthenium salts with bases were investigated using Ia as a typical substrate. The main product thus obtained was 9-(p-methoxyphenyl)-9-phenylthioxanthene (II). The reaction pathway via intramolecular Stevens-type 1,4-rearrangement is postulated.
THE GENERATION OF LITHIO-TRI-n-BUTYL-(2-CYANOETHYL)TIN. A NEW REAGENT FOR THE PREPARATION OF 2-SUBSTITUTED CYCLOPROPANE-1-CARBONITRILES AND SPIRO[2.n]ALKANE-1-CARBONITRILES
Authors: Teratake Shuji 
Published: July 2006

Abstract
Tri-n-butyl-(2-cyanoethyl)tin is lithiated effectively and the resultant salt reacts with various carbonyl compounds to give corresponding addition products. Cyanocyclopropane derivatives can be prepared from the addition products through the 1,3-dehalostannylation reaction.
A CONVENIENT METHOD FOR THE PREPARATION OF STYRENE DERIVATIVES BY THE USE OF TiCl4 AND Zn
Authors: Song Suk-zu , Shiono Manzo , Mukaiyama Teruaki 
Published: July 2006

Abstract
β-Hydroxysulfides, prepared by the reaction of α-lithio benzyl phenyl sulfide with various aldehydes or ketones, gave styrene derivatives in good yields when treated with TiCl4 and Zn.
A PHOTOLYTIC ONE-STEP SYNTHESIS AND STEREOCHEMISTRY OF 1,4-DIMETHYL-9-ARYLFLUORENES
Authors: Iwamura Hiizu 
Published: July 2006

Abstract
Photolysis of 2,5-dimethyltriptycene (3) in methanol gives 1,4-dimethyl-9-(2-substituted phenyl)fluorenes 1 and 2 in 89 and 5 % yields, respectively. The results are interpreted in terms of the regioselective formation of intermediate carbene 4. The temperature dependent NMR study gives a rough estimate of ΔGc≠ value for restricted rotation around the C(9)-aryl bond in 2 as 19.4 kcal/mol (104°C).
HALOGENATION OF 2,3-HOMOTROPONE. SYNTHESES OF HALO-SUBSTITUTED 2,3-HOMOTROPONES
Authors: Ito Yoshinobu , Oda Masaji , Kitahara Yoshio 
Published: July 2006

Abstract
Bromination of 2,3-homotropone (1) with molecular bromine gave two dibromides, (3) and (4). Chlorination of (1) with sulfuryl chloride proceeded in a different manner to give four dichlorides, (8), (9), (10), and (11). These dihalides were easily converted into halo-substituted 2,3-homotropones, (6), (7), (12), and (13), on treatment with bases.
SEPARATION OF THE RECOIL PRODUCTS OF INORGANIC PHOSPHORUS OXYACIDS BY CROSS ELECTROPHORESIS
Authors: Kitaoka Yoshinori 
Published: July 2006

Abstract
An attempt was made to separate the recoil products of phosphorus oxyacids (salts of hypophosphite, phosphite, orthophosphate and pyrophosphate) by a cross electrophoresis using zinc ions. This electrophoresis was found to have a general applicability to the isolation of a trace amount of a proper compound from a given matrix which forms insoluble complexes.
ASYMMETRIC HYDROGENATION CATALYZED BY BIS(DIMETHYLGLYOXIMATO)COBALT(II)- ACHIRAL BASE COMPLEX AND CHIRAL AMINOALCOHOL CONJUGATED SYSTEMS. AN OXIDO-REDUCTASE MODEL WITH ENANTIOSELECTIVITY
Authors: Ohgo Yoshiaki , Natori Yukikazu , Takeuchi Seiji , Yoshimura Juji 
Published: July 2006

Abstract
A new effective catalyst-system for asymmetric hydrogenation was found, which resembles oxido-reductases in functions. The effects of protonated chiral base in this system made possible to present the mechanism of this catalytic hydrogenation and the enantioselection. The optical yield of benzoin at −10°C reached 78%.
AN ABNORMAL CIAISEN REARRANGEMENT OF 5-HYDROXY-7-CINNAMYLOXY-2-METHYLCHROMONE
Authors: Jain A C , Gupta R K 
Published: July 2006

Abstract
The Claisen rearrangement of 5-hydroxy-7-cinnamyloxy-2-methyl chromone (2) has yielded 4′,5′-dihydro-5-hydroxy-2,4′-dimethyl-5′-phenyl-furo (2′,3′:7,8) chromone (6) as established by its NMR spectrum and that of its acetate and methyl ether. The pathway of its formation presumably has structures 3 to 5.
THE REACTION OF CARBONYLHYDRIDOFERRATE(O) IN APROTIC SOLVENTS. I. HYDROACYLATION OF α,β-UNSATURATED CARBOXYLIC ESTERS
Authors: Mitsudo Take-aki , Watanabe Yoshihisa , Yamashita Masakazu , Takegami Yoshinobu 
Published: July 2006

Abstract
α,β-Unsaturated carboxylic esters selectively insert into the hydrogen-iron bond of [FeH(CO)4]− in an aprotic solvent under an ambient condition to give an alkyl–iron complex, which gives a hydroacylated product by treatment with alkyl iodide.
THE IMPORTANCE OF INTRAMOLECULAR CHARGE TRANSFER EFFECT ON THE MOLECULAR CONFIGURATION OF p-NITROBENZYLIDENE-p-DIMETHYLAMINOANILINE
Authors: Ezumi Kiyoshi , Nakai Hiroshi , Sakata Shigeru , Nishikida Koichi , Shiro Motoo , Kubota Tanekazu 
Published: July 2006

Abstract
The structure of p-nitrobenzylidene-p-dimethylaminoaniline [I] was determined as planar transconfiguration. This is quite different from the structure of benzylideneaniline etc., which are not planar. It is stressed that the intramolecular charge transfer interaction between the substituents in [I] may play an important role for the configuration.
BINUCLEAR COPPER(II) COMPLEX BRIDGED WITH ALKYLAMINE OXIDE, BIS[BIS(2-AMINOETHYL)METHYLAMINE OXIDE]DICOPPER(II) PERCHLORATE
Authors: Tanaka Mitsunori , Okawa Hisashi , Miyashita Ryozo , Kida Sigeo 
Published: July 2006

Abstract
A copper(II) complex of bis(2-aminoethyl)methylamine oxide was synthesized and characterized by elemental analyses, magnetic susceptibility measurements, and IR and electronic spectroscopies. The compound has the binuclear structure bridged with alkylamine oxide. It has a distinct absorption in the near-ultraviolet region(31×103 cm−1) which was assigned to the characteristic CT band of oxygen-bridged copper(II) complexes.
LANTHANUM FLUORIDE CERAMIC MEMBRANES AS SELECTIVE ELECTRODE FOR FLUORIDE ION
Authors: Hirata Hiroshi , Ayuzawa Masatake 
Published: July 2006

Abstract
A new type of fluoride ion-selective ceramic membrane electrode was developed by using lanthanum fluoride, europium fluoride and calcium fluoride. The membrane was prepared by sintering at a temperature higher than 1200°C in an atmosphere of hydrogen fluoride gas stream. Satisfactory response characteristics were obtained over the concentration range of 10−1 to 10−6M.
ABNORMAL REACTIONS OF GRIGNARD REAGENTS WITH 2, 4, 6-TRI-t-BUTYLNITROBENZENE
Authors: Okazaki Renji , Inagaki Yoshio , Inamoto Naoki 
Published: July 2006

Abstract
The reactions of 2,4,6-tri-t-butylnitrobenzene with the Grignard reagents give rise to products derived from an attack of the latter onto the ortho- and the para-positions to the nitro-group.
PREPARATION OF OPTICALLY ACTIVE CATION EXCHANGERS WITH l-TARTRATE GROUPS AND ITS APPLICATION TO THE RESOLUTION OF [Co(en)3]3+ ION
Authors: Fujita Miho , Yoshikawa Yuzo , Yamatera Hideo 
Published: July 2006

Abstract
Two types of optically active Sephadex cation exchangers, in which l-tartrate groups were linked to form ether or ester, were prepared by simple methods for the first time. These cation exchangers were effectively applied to a direct chromatographic resolution of [Co(en)3]3+.
OXIDATION OF 4-ALKYL-HYDROXYIMINO-2,4,6-TRI-t-BUTYL-2,5-CYCLOHEXADIENES. CONVENIENT METHOD FOR THE PREPARATION OF 4-ALKYL-2,6-Di-t-BUTYLNITROBENZENES
Authors: Okazaki Renji , Inagaki Yoshio , Inamoto Naoki 
Published: July 2006

Abstract
Reactions of 4-alkyl-l-hydroxyimino-2,4,6-tri-t-butyl-2,5-cyclohexadienes with silver oxide or nickel “peroxide” give 4-alkyl-2,6-di-t-butylnitrobenzenes, which are otherwise inaccessible without difficulty, in good yields.
MÖSSBAUER MEASUREMENTS OF IRON ATOMS DISPERSED IN AMORPHOUS GLASSLIKE CARBONS
Authors: Yajima Seishi , Omori Mamoru 
Published: July 2006

Abstract
Various iron species have been prepared by pyrolyzing acetylferrocene-furfural resins at 400°C in vacuum, and analysed by means of Mössbauer spectroscopy. The Mössbauer spectra show that the iron species in an amorphous glasslike carbon matrix are free iron atoms, Fe+ ions, iron clusters, superparamagnetic irons and ferromagnetic irons.
CONDENSATION REACTION OF 2-METHYLAZULENE DERIVATIVES WITH BENZALDEHYDE; FORMATION OF 2-STYRYLAZULENES
Authors: Saito Motoyasu , Morita Tadayoshi , Takase Kahei 
Published: July 2006

Abstract
2-Methylazulene derivatives, possessing electron-withdrawing substituents, such as alkoxycarbonyl or cyano group, at the 1- and/or 3-positions, were reactive to undergo condensation reaction with benzaldehyde, in the presence of sodium alkoxide, yielding 2-styrylazulene derivatives, from which 2-styrylazulene itself could be derived by removal of the substituents.
SYNTHESIS OF TAXODIONE AND METHYL 11-HYDROXY-12-METHOXY-7-OXOABIETA-8,11,13-TRIEN-18-OATE
Authors: Matsumoto Takashi , Ohsuga Yasuo , Fukui Kenji 
Published: July 2006

Abstract
Oxidation of methyl 12-hydroxyabieta-8,11,13-trien-18-oate (X), prepared from (−)-abietic acid (II), with benzoyl peroxide gave methyl 11-benzoyloxy-12-hydroxyabieta-8,11,13-trien-18-oate (XII), which was converted to natural taxodione (I) and methyl 11-hydroxy-12-methoxy-7-oxoabieta-8,11,13-trien-18-oate (XI).
SOLID-LIKE WATER IN CETYL ALCOHOL
Authors: Murase Norio , Gonda Kinji , Kagami Ikuzo , Koga Shozo 
Published: July 2006

Abstract
Addition of a small amount of water to cetyl alcohol caused a marked increase of electrical conductivity in the α-state. Deuteron magnetic resonance spectra for the hydrated specimens indicate that the water molecules are contained in a solid-like state and enhance the protonic conduction presumably by the Grotthus mechanism.
THE OBSERVATION OF CADMIUM ATOMS IN THE STATE OF 5 3P0
Authors: Takaoka Motoaki , Yamamoto Shunzo , Tsunashima Shigeru , Sato Shin 
Published: July 2006

Abstract
The 5 3P0 state of cadmium atoms produced in the Cd-photosensitized reactions of Ar, N2, and NH3 has been observed by the absorption at the wavelengths of 340.4 nm (5 3D1–5 3P0) and 467.8 nm (6 3S1–5 3P0). The pressure dependence is displayed.
A CONVENIENT METHOD FOR THE SYNTHESES OF 2(1H)-IMIDAZOLONE DERIVATIVES
Authors: Taguchi Takeo , Sato Yoshinari , Watanabe Kenzo , Mukaiyama Teruaki 
Published: July 2006

Abstract
It was established that N-protected 2(1H)-imidazolone derivatives are conveniently prepared by the reaction of benzyl N-potassium-N-cyanocarbamate [Ia] or ethyl N-potassium-N-cyanocarbamate [Ib] with α-halo carbonyl compounds. N-Protecting group, benzyloxycarbonyl or ethoxycarbonyl group, was easily removed either by hydrogenation on Pd–C or alkaline hydrolysis to afford 2(1H)-imidazolone in good yields.
CATALYSIS AND COORDINATIVE UNSATURATION OF THE SULFURATED NICKEL SURFACE
Authors: Takeuchi Atsushi , Tanaka Ken-ichi , Miyahara Koshiro 
Published: July 2006

Abstract
Sulfurated nickel is catalytically inactive for the hydrogenation of olefin but active for the isomerization of butene and the C2H4–C2D4 exchange reaction in coexistence of hydrogen.
On contaction with acetylene, the surface becomes active for the hydrogenation of olefin and the H2–D2 equilibration as well as the hydrogenation of acetylene. These characteristics are well described by the degree of coordinative unsaturation of active sites suggested by Siegel.
INTERMEDIATES IN THE PHOTOCHEMICAL REACTIONS OF CAMPHORQUINONE WITH ALIPHATIC ALDEHYDES
Authors: Maruyama Kazuhiro , Takahashi Tomoji 
Published: July 2006

Abstract
The dynamic aspects of photochemical reactions of camphorquinone with aliphatic aldehydes were investigated by means of CIDNP. Besides that the two types of stable products (1)–(3) could be produced through ionic rearrangement of unstable intermediates (6), (7) arose from radical pair (5), the reverse hydrogen atom abstraction reaction was found to occur between the two radicals resulted from the reaction of photo-excited camphorquinone and aldehyde.
A GRAPH THEORETICAL DERIVATION OF THE ISOMERS OF TRICYCLIC HYDROCARBONS
Authors: Tanaka Nobuhide , Iizuka Takeshi , Kan Tadayoshi 
Published: July 2006

Abstract
The isomers of tricyclic hydrocarbons CnH2n−4 having neither side chains nor multiple bonds have been classified into 12 classes from a graph theoretical point of view. We have also found an algorithm for deriving all the structures and the numbers of the isomers, and as an example, we show all the skeletons and the indices of the isomers in the class for C10H16 to which Adamantane belongs.
EQUILIBRIUM OF THE ADDUCT FROM TRIBUTYLPHOSPHINE AND PHENYL ISOTHIOCYANATE AND 31P-NMR CHEMICAL SHIFTS OF THE ADDUCTS FROM TRIBUTYLPHOSPHINE AND ISOTHIOCYANATES
Authors: Akiba Kin-ya , Yoneyama Toshio , Inamoto Naoki 
Published: July 2006

Abstract
Equilibrium constants of the adduct (3c) from tributylphosphine (4) and phenyl isothiocyanate (5c) were measured in some solvents and 31P-NMR chemical shifts of the adducts (3) from (4) and isothiocyanates (RNCS) (5) were measure in DMF and correlated linearly with the σp values of the R groups.
SYNTHESIS AND ABSOLUTE CONFIGURATION OF TRANS-MERANZINIC ACID
Authors: Matsumoto Takashi , Fukui Kenji , Nanbu Mutsumu 
Published: July 2006

Abstract
Trans-meranzinic acid, (+)-II, was synthesized from 2-hydroxy-4-methoxy-3-(3-methylbut-2-enyl)benzaldehyde (V) via (±)-2,3-dihydro-7-formyl-2-(1-hydroxy-1-methylethyl)-4-methoxybenzofuran (VII) and (±)-II which was successfully resolved by means of cinchonidine. Subsequently, (+)-II was subjected to exhaustive ozonolysis to afford known (+)-(R)-3-hydroxy-4,4-dimethylbutyrolactone (X). Thus, the stereochemistry of C-2 in (+)-II was assigned as R-configuration.
A CONVENIENT METHOD FOR THE PREPARATION OF 1-PHENYLTHIO-1,3-BUTADIENE DERIVATIVES
Authors: Kuwajima Isao , Sugimoto Kosaku , Murofushi Toshiaki 
Published: July 2006

Abstract
1-Phenylthio-1,3-butadiene derivatives were prepared in good yield via 1,2-elimination reaction of acetoxy and phenylthio group by treating the corresponding 1-[bis(phenylthio)methyl] allyl acetate with dialkylcopper lithium.
CHANGE OF FAR-INFRARED SPECTRA OF β-HYDROQUINONE CLATHRATE OF ACETONITRILE WITH TIME
Authors: Fukushima Kunio 
Published: July 2006

Abstract
Far-infrared spectra of β-hydroquinone clathrate of acetonitrile were found to change with time. The change is explained by decomposition of β-hydroquinone clathrate of acetonitrile into α-hydroquinone.
FORMATION OF STEROIDAL SKELETON FROM RESIN ACID
Authors: Tahara Akira , Shimagaki Masayuki , Kenkyusho Rikagaku , Itoh Masayoshi , Harigaya Yoshihiro , Onda Masayuki 
Published: July 2006

Abstract
Dehydroabietic acid (1) was converted into 14 and 20 having the steroidal skeleton, by the use of its isopropyl group for the formation of the steroidal d-ring.
MAGNETIC QUENCHING OF FLUORESCENCE OBSERVED WITH CARBON DISULFIDE EXCITED BY A NITROGEN LASER
Authors: Matsuzaki Akiyoshi , Nagakura Saburo 
Published: July 2006

Abstract
Fluorescence from the 1A2 state of CS2 was found to be quenched by a magnetic field. This is the first observation of the magnetic quenching of emission from the excited singlet state. The quenching was found to be due to the enhancement of intramolecular nonradiative energy transfer by a magnetic field.
INDUCED CIRCULAR DICHROISM OF RACEMIC METHYLCYCLOHEXANONES INCLUDED IN β-CYCLODEXTRIN
Authors: Otagiri Masaki , Ikeda Ken , Uekama Kaneto , Ito Osamu , Hatano Masahiro 
Published: July 2006

Abstract
When cyclohexanone and its methyl derivatives were included in the cavities of cyclodextrins, the induced circular dichroism (CD) bands were observed in the absorption region of n-π* transition of the carbonyl chromophore. The sign of induced CD band of 2-methylcyclohexanone included in β-cyclodextrin was same as that of resolved R-isomer. From these observations the mode of inclusion and structure of β-cyclodextrin complex with methylcyclohexanone were discussed.
PHOTO-INDUCED ISOMERIZATION OF 2-ACYL-3-METHYL-1,4-NAPHTHOQUINONE-2,3-EPOXIDE
Authors: Maruyama Kazuhiro , Arakawa Seiiti 
Published: July 2006

Abstract
2-Acyl-3-methyl-1,4-naphthoquinone-2,3-epoxide(1) isomerizes photochemically to give lactone. The spectral data and chemical reactions of the lactone are compatible with structure(2). Photochemical reaction of (1) with xanthene was also described.
A NOVEL TYPE OF ADDUCTS IN THE PHOTOCHEMICAL REACTIONS OF o-CHLORANIL WITH ALDEHYDES
Authors: Maruyama Kazuhiro , Miyazawa Toshifumi , Kishi Yasuo 
Published: July 2006

Abstract
Photochemical reactions between o-chloranil and aldehydes were extensively studied. In the reactions with iso-butyraldehyde and 2-ethylbutyraldehyde, photo-adducts of a novel type proved to be produced. The structure of these photo-adducts determined by IR, PMR, and mass spectra, and by elemental analysis was compatible with 3,3-dialkyl-5,6,7,8-tetrachloro-2,3-dihydro-1,4-benzodioxin-2-ol (II).
BIOTIN SYNTHESIS. I. SYNTHESIS OF 4-(4-CARBOXYBUTYL)-1,2-DIHYDROTHIENO[3,4-d]IMIDAZOL-2-ONE
Authors: Taguchi Takeo , Sato Yoshinari , Watanabe Kenzo , Mukaiyama Teruaki 
Published: July 2006

Abstract
4-(4-Carboxybutyl)-1,2-dihydrothieno[3,4-d]imidazol-2-one [I], a precusor of dl-biotin, was synthesized via 6 steps starting from 4-methyl-2(1H)-imidazolone.
SYNTHESIS OF γ-LACTONES BY THE CONDENSATION OF 2-ALKENE-1,4-DIOLS WITH ORTHOCARBOXYLIC ESTERS
Authors: Kondo Kiyosi , Mori Fumio 
Published: July 2006

Abstract
Various γ-lactones bearing vinylic substituent on β-position were obtained directly by the thermal condensation of trans-2-alkene-1,4-diols with orthocarboxylic esters in the presence of a catalytic amount of hydroquinone or phenol.
SYNTHESES OF 8-(1,2,3,4-TETRACHLOROFULVEN-6-YL)HEPTAFULVENE AND 8-(9-FLUORENYLIDENE)METHYLHEPTAFULVENE
Authors: Kuroda Shigeyasu , Oda Masaji , Kitahara Yoshio 
Published: July 2006

Abstract
Treatment of [2-(2,3,4,5-tetrachloro-1,3-cyclopentadienyl)vinyl]tropylium fluoroborate 9 with bases gave 8-(1,2,3,4-tetrachlorofulven-6-yl)heptafulvene 4. In similar way 8-(9-fluorenylidene)methyl heptafulvene 5 was also prepared. 4 is more polar than 5 is, but is less stable. Both 4 and 5 easily gave [8+2] cycloadducts with tetracyanoethylene.
AN IMPROVED ROUTE TO NICKEL(0) CARBONYL DERIVATIVES WITH TERTIARY PHOSPHINE
Authors: Tanaka Koji , Kawata Yasuo , Tanaka Toshio 
Published: July 2006

Abstract
L2NiCl2 (L2= 2Ph3P, 2MePh2P, Ph2PCH2CH2PPh2, and Ph2PCH=CHPPh2) reacts with carbon monoxide in the presence of MeSNa in ethanol to give L2Ni(CO)2 and dimethyldisulfide. (Ph3P)2Ni(CO)2 is also synthesized by the reaction of NiCl2·6H2O with Ph3P, MeSNa, and carbon monoxide. The pathway of these reactions is described.