bluuebunny/crossref_metadata_2025 huggingface dataset:
ELECTRON SPIN RESONANCE SPECTROSCOPIC INVESTIGATIONS OF t-BUTYL SUBSTITUTED N-ARYL-N-ARYLTHIOAMINYLS
Authors: Miura Yozo , Katsura Yosuke , Kinoshita Masayoshi
Published: July 2006

t-Butyl substituted N-aryl-N-arylthioaminyls (2) were generated and their ESR and visible spectral data were determined. The radicals persist for a few days and it seems that they are not sensitive to oxygen.
MICROWAVE SPECTRA OF THE TRANS–TRANS ISOMER OF METHYLPROPYLETHER
Authors: Hayashi Michiro , Imachi Misako , Nakagawa Jun , Ozaki Akane
Published: July 2006

Microwave spectra of the trans–trans isomer of methylpropylether and its four deuterated species were measured. A plausible structure was estimated from the observed rotational constants. The dipole moment was determined to be 1.107 ± 0.005 D by Stark effect measurements. From the observed splittings of the spectra in the excited torsional state, the barrier to internal rotation of the CH3C group was obtained as 3280 ± 60 cal/mol.
EFFECTS OF CO-CATALYSTS ON THE DIMERIZATION OF ISOPRENE BY BIS(TRIPHENYLPHOSPHINE) NICKEL DICHLORIDE-AMINE-SODIUM BOROHYDRIDE SYSTEM
Authors: Mochida Isao , Kitagawa Kazunori , Fujitsu Hiroshi , Takeshita Kenjiro
Published: July 2006

A proper amount of water was found to enhance significantly the catalytic activity of Ni(PPh3)2Cl2–Amine-NaBH4 for the dimerization of isoprene. The principal products were linear dienes with n-propylamine, and cyclic ones with pyridine and its derivatives, respectively, but almost independent on the amount of water.
SYNTHESES OF [3.3] PARACYCLOPHANES AND THEIR HIGHER CYCLIC OLIGOMERS
Authors: Synmyozu Teruo , Kumagae Kimitaka , Inazu Takahiko , Yoshino Tamotsu
Published: July 2006

Tetraethyl [3.3] paracyclophane-2,2,11,11-tetracarboxylate, its 5,8-dimethyl and 5,6,8,9-tetramethyl homologues, and respective higher cyclic oligomer(s) were synthesized by condensation of tetraethyl p-diethylbenzene-ω,ω,ω′,ω′-tetracarboxylate with 1,4-bis(bromomethyl)-benzene, and its 2,5-dimethyl and 2,3,5,6-tetramethyl homologues in presence of sodium hydride under high dilution condition, respectively. 5,6,8,9-Tetramethyl[3.3]paracyclophane was obtained by hydrolysis, decarboxylative chlorination and reduction of tetraethyl 5,6,8,9-tetramethyl[3.3] paracyclophane-2,2,11,11-tetracarboxylate.
ELECTRON SPIN RESONANCE STUDY OF SPIN PROBES IN FROZEN AQUEOUS SOLUTIONS
Authors: Sato Eiji , Uematsu Shogo , Akahori Yukio
Published: July 2006

The ESR spectra of 12-nltroxlde stearic acid (12-NS) in frozen aqueous solutions of sodium hydroxide(1N∼0.005N) were examined in the temperature range from −22.0 to −0.1°C. The ESR line shapes of the spectra of 12-NS in ice exhibit two types spectra overlaped, a broad singlet and a sharp triplet. Some amounts of 12-NS molecules move rapidly in frozen aqueous solutions below the melting point of ice.
A NEW SYNTHESIS OF dl-VARIOTIN
Authors: Ishida Akihiko , Mukaiyama Teruaki
Published: July 2006

A new synthesis of dl-variotin (1) was accomplished by the reaction of 2-ethoxy-1-pyrroline and (2E,4E,6E)-8-hydroxy-6-methyl-2,4,6-dodecatrienoic acid (14), without protection of the hydroxyl group at C-8, utilizing 1-methyl-2-chloropyridinium iodide as a coupling reagent.
PROSTAGLANDINS AND CONGENERS XII. THE SYNTHESIS OF dl-THREO AND dl-THREO-15,16-DIHYDROXYPROSTAGLANDINS
Authors: Hallett W A , Wissner A , Grudzinskas CV , Weiss M J
Published: July 2006

An efficient first synthesis of all four dl-16-hydroxy-PGE2 racemates via conjugate addition of functionalized vinyl cuprates to a cyclopentenone is presented. Compounds in the PGA2 and PGF2α series are also described.
SYNTHESIS OF 1,2-PROPANEDIOL FORMATES FROM CARBON DIOXIDE, HYDROGEN, AND METHYLOXIRANE CATALYZED BY TRANSITION METAL COMPLEX
Authors: Koinuma Hideomi , Kato Hirohiko , Hirai Hidefumi
Published: July 2006

Glycol formates were prepared in a new type of catalytic reaction using carbon dioxide, hydrogen, and an oxirane as direct starting materials, and a transition metal complex like tris(triphenylphosphine)chlororhodium as catalyst.
1-ACETYL-2-THIOXO-4-IMIDAZOLIDINONES AS REACTIVE ACETYLATING AGENT
Authors: Sashio Minoru , Imono Shozo , Tanaka Makoto
Published: July 2006

Trans-acetylation of 1-acetyl-2-thioxo-4-imidazolidinones was investigated under mild and neutral conditions. It was found that the reagents were active toward amino group, but inactive toward hydroxy group.
THE FORMATION OF CYCLOPENT[cd]AZULENE AND BENZ[cd]AZULENE DERIVATIVES BY A FRIEDEL–CRAFTS-TYPE RING CLOSURE OF DIETHYL 4-PHENYLETHYNYL- AND DIETHYL 4-STYRYLAZULENE-1,3-DICARBOXYLATES WITH POLYPHOSPHORIC ACID
Authors: Nakadate Teruo , Morita Tadayoshi , Takase Kahei
Published: July 2006

Diethyl 4-phenylethynylazulene-1,3-dicarboxylate (3) undergoes a Friedel–Crafts-type ring closure on treatment with polyphosphoric acid to give the cyclopent[cd]azulene derivative (5). In a similar manner, diethyl 4-styrylazulene-1,3-dicarboxylate (4) gives the benz[cd]azulene derivative (8) and the cyclopent[cd]azulene derivative (9). Some chemical properties of 5 are described.
1H-NMR STUDY OF AEROSOL OT IN SOLUTION
Authors: Ueno Masaharu , Kishimoto Hiroshi , Kyogoku Yoshimasa
Published: July 2006

The solution states of Aerosol OT were studied by 1H-NMR measurements. In water two hydrocarbon chains of Aerosol OT molecules in monomeric state aggregate with each other with hydrophobic interactions as in micellar state.
DYE-SENSITIZED PHOTOOXYGENATION OF N,N-DIMETHYLBENZYLAMINE. SINGLET-OXYGEN PROCESS IN COMPETITION WITH TYPE I PROCESS
Authors: Inoue Kenzo , Saito Isao , Matsuura Teruo
Published: July 2006

Dye-sensitized photooxygenation of N,N-dimethylbenzylamine was shown to proceed by both singlet-oxygen and Type I mechanisms. The efficiency of each process was found to be strongly dependent on the type of photosensitizer.
REACTIONS OF S-METHYL THIOBENZOATE WITH METHYL TRIFLATE AND MAGIC METHYL. FORMATION OF BENZOIC TRIFLUOROMETHANESULFONIC ANHYDRIDE AND BENZOYLDIMETHYLSULFONIUM ION
Authors: Minato Hiroshi , Miura Takashi , Kobayashi Michio
Published: July 2006

The reactions of S-methyl thiobenzoate with methyl triflate and methyl fluorosulfate yielded benzoic trifluoromethanesulfonic anhydride and benzoyldimethylsulfonium ion, respectively. Both of these reactive intermediates were found to function as powerful benzoylating agents for an arene, amine, alcohol, and phenol.
PHOTOCHEMICAL REACTIONS OF p-DICYANOBENZENE WITH PRIMARY AND SECONDARY AMINES
Authors: Ohashi Mamoru , Miyake Kentaro
Published: July 2006

In sharp contrast with the cases of benzene or anthraceneprimary or secondary amine systems, photochemical reactions of p-dicyanobenzene with those amines take place at the α-positions instead of the N–H groups of amines via electron-transfer followed by proton-transfer.
STEREOSELECTIVITY IN ION-PAIR FORMATION. I. ASSOCIATION CONSTANTS OF Λ- AND Δ-[Co(en)3]3+ WITH l- AND MESO-TARTRATES FROM CD MEASUREMENTS
Authors: Yoneda Hayami , Taura Toshiaki
Published: July 2006

The ion association constants and the molar CD’s were determined for the ion pairs, Λ- AND Δ-[Co(en)3]3+ with l- and meso-tartrates, by utilizing CD measurements. The structures of these ion pairs were consistently interpreted in terms of the above two parameters. Furthermore, the results obtained here were compared with the chromatographic behaviors of these systems.
REINVESTIGATION ON THE CIDNP IN THE THERMOLYSIS OF DISPIRO[2.2.2.2]DECA-4,9-DIENE
Authors: Tsuji Takashi , Nishida Shinya
Published: July 2006

CIDNP in the thermolysis of dispiro[2.2,2.2]deca-4,9-diene and its derivative is reinvestigated and is found to be better explained in terms of S–T. mixing in the singlet biradical 3 rather than S–To mixing in 2, originally proposed.
8-QUINOLYL NUCLEOSIDE 5′-PHOSPHATES AS A USEFUL INTERMEDIATE FOR THE SYNTHESIS OF NUCLEOSIDE 5′-DI- AND 5′-TRI-PHOSPHATES
Authors: Takaku Hiroshi , Konishi Toshimi , Hata Tsujiaki
Published: July 2006

Nucleoside 5′-di- and 5′-tri-phosphates were obtained in high yields by the reaction of 8-quinolyl nucleoside 5′-phosphates with phosphoric or pyrophosphoric acids in the presence of cupric chloride.
NOVEL DECARBOXYLATIVE REACTION OF THE SUBSTITUTED CINNAMYL CINNAMATES (STYRACINS) MEDIATED BY TRANSITION METALS
Authors: Tokoroyama Takashi , Nakamura Masaki
Published: July 2006

When the substituted cinnamyl cinnamates (I, styracins), which have hydroxyl groups in the phenyl rings, were treated with platinum and palladium catalysts, 1,5-diaryl-1,4-pentadienes (II) were obtained in variable yields up to 34% with other products.
THE SYNTHESIS OF (±)-GLUTINOSONE
Authors: Murai Akio , Taketsuru Hirofumi , Fujisawa Koji , Nakahara Yu-uji , Takasugi Mitsuo , Masamune Tadashi
Published: July 2006

The synthesis of (±)-glutinosone, an antifungal norsesquiterpene from Nicotiana glutinosa infected with tobacco mosaic virus, is described.
57Fe- AND 119Sn-MÖSSBAUER SPECTROSCOPIC STUDIES OF THE MOLECULAR DYNAMICS OF (π-C5H5)Fe(CO)2Sn(C6H5)3 AND (π-C5H5)Fe(CO)2SnCl3
Authors: Sano Hirotoshi , Yamamoto Hajime
Published: July 2006

The Mössbauer effect of the 14.4 keV 57Fe and 23.8 keV 119Sn transitions has been studied in (π-C5H5)Fe(CO)2Sn(C6H5)3 and (π-C5H5)Fe(CO)2SnCl3 crystals. From the temperature dependence of the recoil-free fraction in iron and tin experiments, practically the same characteristic temperature (58 K for each Mössbauer resonance) has been found in the (π-C5H5)Fe(CO)2SnCl3, while two slightly different values (42 K for the iron resonance and 47 K for the tin resonance) have been estimated in the (π-C5H5)Fe(CO)2Sn(C6H5)3.
TRIALKYLZINCLITHIUM [R3ZnLi] A NEW REAGENT FOR CONJUGATE ADDITION TO α,β-UNSATURATED KETONES
Authors: Isobe Minoru , Kondo Shigehiro , Nagasawa Norimichi , Goto Toshio
Published: July 2006

Trialkylzinclithium is readily prepared in THF by mixing zinc chloride (or its TMEDA complex) and alkyllithium in a 1 : 3 mole ratio. Conjugate addition of this new reagent is demonstrated with 2-cyclohexen-1-one (I) and dicyclopentadien-1-one (IV) as a,α,β-unsaturated ketones.
ONE-STEP SYNTHESIS AND STRUCTURAL CONFIRMATION OF 1-PYRROLINE TRIMER
Authors: Nomura Yujiro , Ogawa Keiichiro , Takeuchi Yoshito , Tomoda Shuji
Published: July 2006

Oxidation of pyrrolidine with aqueous alkaline solution of sodium peroxodisulfate in the presence of silver nitrate gave 1-pyrroline trimer in moderate yield with remarkable selectivity and its structure was established.
THE FORMATION OF A STABLE COPPER(II) COMPLEX WITH l-ASCORBIC ACID
Authors: Yamamoto Yasuo , Ishizu Keiko , Shimizu Yoko
Published: July 2006

The formation of stable l-ascorbato(2,2′-bipyridine)copper(II) complex in solution was confirmed and studied chiefly by means of its absorption and CD spectra.
NEW SYNTHESIS OF γ-DAMASCONE
Authors: Takazawa Osamu , Saigo Kazuhiko , Narasaka Koichi , Mukaiyama Teruaki
Published: July 2006

γ-Damascone was selectively synthesized in good yield from γ-damascol by the oxidation of its alkoxymagnesium bromide with 1,1′-azodicarbonyldipiperidine. γ-Damascol was prepared by the reaction of γ-cyclocitral with 1-propynyllithium and the successive reduction with lithium aluminum hydride.
SUBSTITUENT EFFECTS ON C-13 CHEMICAL SHIFT OF THE SIDE-CHAIN Cβ-ATOMS IN SUBSTITUTED PHENYLALKANES, PHENYLCYCLOPROPANES, AND α-METHYLSTYRENES. EFFECT OF HYBRIDIZATION AND CONTRIBUTION OF 1,3-THROUGH-SPACE INTERACTION
Authors: Inamoto Naoki , Masuda Shozo , Nakanishi Waro , Ideda Yoshitsugu
Published: July 2006

The normal and inverse substituent effects on the C-13 chemical shifts of Cβ-atoms in the titled compounds are explained by the π bond character of the Cα–Cβ bond. The transmission mode in m- and p-series has been discussed in terms of 1,3-through-space interaction. Therefore, both series should be treated separately.
MILD AND SELECTIVE REDUCTION OF SULFOXIDES IN THE MIXTURE WITH OTHER SULFINYL COMPOUNDS WITH TRIFLUOROACETIC ANHYDRIDE—HYDROGEN SULFIDE SYSTEM
Authors: Drabowicz Jozef , Oae Shigeru
Published: July 2006

A rapid and convenient method for selective reduction of sulfoxides to the corresponding sulfides in the mixture with other sulfinyl compounds, i.e., sulfinic esters and t-butyl thiolsuifinates, with (CF3CO)2O–H2S system is described.
5,8-DITHIAFULVALENE-1,4-QUINONE [2-(1,3-DITHIOL-2-YLIDENE)-4-CYCLOPENTENE-1,3-DIONE]
Authors: Nakayama Jyuzo , Ishihara Miyoko , Hoshino Masamatsu
Published: July 2006

5,8-Dithiafulvalene-1,4-quinone [2-(1,3-dithiol-2-ylidene)-4-cyclopentene-1,3-dione] and its benzo-derivatives were synthesized and their spectroscopic properties were described.
SURFACE-ACTIVE PORPHYRINS
Authors: Yamamura Takeshi
Published: July 2006

A series of cationic surface-active porphyrins were synthesized, and their micellar formations in organic solvents were confirmed by spectroscopy.
NEW CHIRAL PHOSPHINE-RHODIUM CATALYSTS FOR ASYMMETRIC SYNTHESIS OF (R)- AND (S)-N-BENZYLOXYCARBONYLALANINE
Authors: Achiwa Kazuo
Published: July 2006

The synthesis of new chiral bisphosphine ligands (APPM (4) and PPPM (5)) and their application to the catalytic asymmetric synthesis of (R)- and (S)-N-benzyloxycarbonylalanine were described.
THE THERMAL REACTION OF VINYLOXIRANE
Authors: Hasegawa Hajime , Saito Hitoshi , Tsuchitani Kazuo
Published: July 2006

Methyl 4,5-epoxy-3-methoxycarbonyl-4-methyl-trans-2-pentenoate gave dimethyl 4-methyl-2,5-dihydrofuran-2,3-dicarboxylate on being heated with acetylenic compounds, while methyl 4,5-epoxy-3-methoxycarbonyl-4-methyl-cis-2-pentenoate gave methyl 3-methoxycarbonyl-4-oxo-2-pentenoate as a main product.
HYDROTHERMAL PREPARATION OF OSMIUM(III) COMPLEXES WITH ETHYLENEDIAMINETETRAACETIC ACID
Authors: Saito Masami , Uehiro Takashi , Yoshino Yukichi
Published: July 2006

Osmium(III) complexes with ethylenediaminetetraacetic acid have been prepared by the reaction of hexachloroosmate(IV) and ethylenediaminetetraacetic acid suspended in water in a Teflon bucket at 14O°C. The complexes have been formulated as H[OsCl2H2edta]·2.5H2O and NH4[OsCl2H2edta] from elementary analyses, pH titration, ir and magnetic measurements.
PHOTOCHEMICAL REDUCTION OF gem-DIBROMOCYCLOPROPANES
Authors: Shimizu Nobujiro , Nishida Sinya
Published: July 2006

Photo-irradiation of nine gem-dibromocyclopropanes in ether solution leads to the corresponding monobromocyclopropanes in moderate to good yields. The stereochemical observation indicates that the partial reduction proceeds via an α-bromocyclopropyl radical.
PHOTOCHEMICAL SYNTHESIS OF 2-CHLORO-3-(2-THIENYL)-1,4-NAPHTHOQUINONES AS A PROMISING PRECURSOR OF NATURALLY OCCURRING QUINONES
Authors: Maruyama Kazuhiro , Otsuki Tetsuo
Published: July 2006

The photochemical reaction of 2,3-dichloro-1,4-naphthoquinone 1 with thiophene derivatives 2 gave 2-chloro-3-(2-thienyl)-1,4-naphthoquinone 3. The products 3 were transformed further to alkyl substituted 1,4-naphthoquinone derivatives.
PHOTOCHEMICAL SYNTHESIS OF NEW SULFUR-CONTAINING POLYCYCLIC AROMATIC COMPOUNDS—ANTHRA[2,1-b]THIOPHENE DERIVATIVES
Authors: Maruyama Kazuhiro , Mitsui Kiichiro , Otsuki Tetsuo
Published: July 2006

6,11-Anthra[2,1-b]thiophenedione 3 was yielded(62%) in the photochemical reaction of 2-bromo-3-methoxy-1,4-naphthoquinone 1 with 1-phenyl-1-(2-thienyl)ethylene 2. The reduction of 3 gave anthra[2,1-b]thiophenes.
A NEW METHOD FOR THE SOLID PHASE SYNTHESIS OF TRYPTOPHAN CONTAINING PEPTIDES
Authors: Ueki Masaaki , Ikeda Shigeru
Published: July 2006

Solid phase synthesis of tryptophan containing peptides with use of diphenylphosphinothioyl(Ppt)-amino acids is described. Ppt group could be removed from tryptophyl peptides without coloration by 2n HCl in methylene chloride containing 1m triphenylphosphine.
NEW MIXED OLEFIN COMPLEXES OF PALLADIUM(0). A STABILIZATION OF THE Pd(0) STATE WITH A COMBINATION OF ELECTRON-DONATING AND ELECTRON-WITHDRAWING OLEFINS
Authors: Itoh Kenji , Ueda Fujio , Hirai Kenji , Ishii Yoshio
Published: July 2006

Mixed olefin complexes of Pd(0) are prepared by a ligand substitution of (dibenzylideneacetone)3Pd2(CHCl3) (1) or (tribenzylideneacetylacetone)3Pd3(CHCl3) (2) with a judicious combination of both electron-donating and electron-withdrawing olefin ligands.
SYNTHESIS OF PLEIADIENE-7,8-DIONE, o-PLEIADIENOQUINONE
Authors: Tsunetsugu Josuke , Sato Masaru , Kanda Mariko , Takahashi Makoto , Ebine Seiji
Published: July 2006

Pleiadiene-7,8-dione, o-pleiadienoquinone (I), was synthesized by hydrolysis of acenaphthylene-dichloroketene adduct (III). E1⁄2 value is −0.23 V at pH 5.28. Spectral data suggest that I has the contribution from such canonical forms as 2,3- (Ia) and/or 4,5-benzotropolonate (Ib) structures.
THE CRYSTAL STRUCTURE OF THE BROWN FORM OF BIS (N-CYCLOHEXYLSALICYLALDIMINATO) COPPER(II)
Authors: Tamura Hatsue , Ogawa Kazuhide , Takeuchi Akira , Yamada Shoichiro
Published: July 2006

The crystal structure of brown form of bis(N-cyclohexylsalicylaldiminato)copper(II) has been determined by the X-ray diffraction method. The coordination of the copper(II) ion is square planar, with Cu–N=2.034Å and Cu–O=1.896Å. The molecule is bent, or stepped, so that the perpendicular distance between the salicylaldimine planes is 1.28Å.
SYNTHESIS OF 2- AND 4-BROMOQUINOLINES WITH A NEW BROMINATING REAGENT, PBr3-DMF
Authors: Yajima Toshikazu , Munakata Katsura
Published: July 2006

A congener of 2- and 4-bromoquinolines was synthesized in good yields from the corresponding methoxyquinolines using a new brominating reagent, PBr3-DMF, under the quite mild conditions. The new reagent seems to be useful in organic synthesis, especially in bromination of the complex molecules.
NEW SIMPLE SYNTHESES OF UNSYMMETRICAL DISULFIDES AND THIOLSULFONATES
Authors: Oae Shigeru , Kim Yong H , Fukushima Daikichi , Takata Toshikazu
Published: July 2006

New one-pot syntheses of both unsymmetrical disulfides and thiolsulfonates by treatment of thionitrites with thiols and sulfinic acids are reported.
RESONANCE RAMAN EFFECTS OF NUCLEOTIDES
Authors: Nishimura Yoshifumi , Hirakawa Akiko Y , Tsuboi Masamichi
Published: July 2006

Raman spectra of β-uridine-5′-phosphoric acid, β-cytidine-5′-phosphoric acid, and β-guanosine-5′-phosphoric acid have been observed in their dilute (10−4 M) neutral aqueous solutions by the use of the 257.3 nm beam of a frequency doubled argon ion laser.
PARTIAL ASYMMETRIC PUMMERER REACTION OF ARYL PROP-2-YNYL SULFOXIDE WITH ACETIC ANHYDRIDE
Authors: Numata Tatsuo , Itoh Osamu , Oae Shigeru
Published: July 2006

The Pummerer reaction of aryl prop-2-ynyl sulfoxides with acetic anhydride was found to be stereospecific. From the 18O-tracer studies, the asymmetric induction at α-carbon is considered to be caused by an intramolecular and somewhat synchronized 1,2-acetoxy migration within the ylide intermediate.
THE CRYSTAL STRUCTURE OF TETRABUTYLAMMONIUM GUANIDINIUM BROMIDE MONOHYDRATE COMPLEX, [N(C4H9)4]+[C(NH2)3]+Br−2·H2O
Authors: Taga Tooru , Ohashi Makoto , Miyajima Koichiro , Yoshida Hiromitsu , Osaki Kenji
Published: July 2006

In the crystal structure of the title compound, the two dimensional hydrogen-bond networks are formed between the guanidinium ions, bromide ions and water molecules. The tetrabutylammonium groups are located at the interstitial space between these hydrogen-bond networks, and the neighboring groups have a large number of hydrophobic contacts.
RESONANCE RAMAN SPECTRA OF CARBONIUM IONS ADSORBED ON POROUS VYCOR GLASS
Authors: Yamamoto Yoichiro , Yamada Haruka
Published: July 2006

When 1,1-diphenylethylene(DPE) was adsorbed on porous Vycor glass, some unstable intermediates, blue, green and yellow species, were produced. The resonance Raman spectra of the green and yellow species were observed. The green species showed three new bands at 2975, 2930 and 2873 cm−1 and the yellow species one at 2930 cm.−1 The observed Raman spectra have confirmed the existence of two kinds of carbonium ions.
THE REACTION OF α-DIAZOKETONES WITH THIOBENZOPHENONE
Authors: Mataka Shuntaro , Ishi-i Seimi , Tashiro Masashi
Published: July 2006

The reaction of azibenzil (1) and α-diazophenanthrone (2) with thiobenzophenone (4) gave the corresponding 1,3-oxathioles 5 and 8 in 31 and 73% yields, respectively, whereas α-diazoacenaphthenone 3 gave diphenylmethylideneacenaphthenone 9 in 97% yield.
A SIMPLE SYNTHESIS OF 1-OCTEN-3-OL(MATSUTAKE ALCOHOL) BY THE TITANIUM-CATALYZED HIGHLY SELECTIVE REDUCTION OF THE BUTADIENE TELOMER WITH LiAlH4
Authors: Tsuji Jiro , Mandai Tadakatsu
Published: July 2006

Treatment of 1,7-octadien-3-ol with di-iso-butylaluminum hydride, followed by highly selective reduction of C7-olefin with LiAlH4 catalyzed by dicyclopentadienyltitanium dichloride produced 1-octen-3-ol.
THE STRUCTURE OF INFLEXIN
Authors: Kubo Isao , Nakanishi Koji , Kamikawa Tadao , Isobe Takahiko , Kubota Takashi
Published: July 2006

The structure of inflexin isolated from the leaves of Isodon inflexus has been determined as 1 by spectroscopic and chemical methods. Inflexin exhibits cytotoxicity, insect antifeedant and other bioactive properties.
FACILE ELECTROCHEMICAL ALKYLATION OF 1-ALKYNES WITH ORGANOBORANES
Authors: Takahashi Yuzuru , Tokuda Masao , Itoh Mitsuomi , Suzuki Akira
Published: July 2006

Trialkylboranes are readily electrolyzed in an undivided cell by using two platinum plates as the electrodes in the presence of 1-alkynes in a tetrahydrofuran solution containing tetraalkylammonium halide to give corresponding alkynes in good yields. In the case of phenylacetylene, all alkyl groups of trialkylboranes are used for alkylation of the alkyne.
STRUCTURE REVISION OF “1-KETO-α-CYPERONE,” A SESQUITERPENE ISOLATED FROM TOBACCO
Authors: Murai Akio , Ono Mitsunori , Masamune Tadashi
Published: July 2006

The structure of “1-keto-α-cyperone” isolated from tobacco was revised to 2-keto-α-cyperone on the basis of the unambiguous transformation of (+)-α-cyperone into the compound.
PHOTOCHEMICAL REACTION IN/ON MEMBRANE LIKE ASSEMBLIES: PHOTOSENSITIZED REDOX REACTION IN/ON LIPOSOME USING ANTHRAQUINONE DERIVATIVE
Authors: Sudo Yukio , Toda Fujio
Published: July 2006

Photoreduction of Fast Red A by ascorbate in/on liposome, using anthraquinone derivative with a long hydrocarbon chain, as a sensitizer was studied. In liposome system, the reaction was accelerated and proceeded through the Michaelis-complex.
RAPID AND EASY SEPARATION OF CHLOROPHYLLS, THEIR DERIVATIVES, AND PLANT YELLOW PIGMENTS BY THIN-LAYER CHROMATOGRAPHY
Authors: Shiraki Masaru , Yoshiura Masahiko , Iriyama Keiji
Published: July 2006

A thin-layer chromatographic method for the analysis of leaf pigments and their derivatives by commercial silica gel layers has been developed. The method is rapid and easy and is suitable for checking the purity of chlorophyll samples for various investigation.
SURFACE COMPOSITIONS AND ACTIVITIES OF CATALYSTS STUDIED WITH X-RAY PHOTOELECTRON SPECTROSCOPY: sec-BUTANOL CONVERSIONS ON SnO2–MoO3 BINARY OXIDE CATALYSTS
Authors: Okamoto Yasuaki , Hashimoto Takeshi , Imanaka Toshinobu , Teranishi Shiichiro
Published: July 2006

The surface compositions of SnO2–MoO3 catalysts were determined using XPS and compared with the activities for sec-butanol. Surface enrichment of MoO3 occurred in the composition range of Mo/Mo+Sn < ca. 0.6, while SnO2 was enriched in the other catalysts. The activities were understood better in terms of the surface composition of the catalyst.
FURANOSESQUITERPENOIDS ABSOLUTE CONFIGURATION OF PALLESCENSIN-1, -2, AND -A
Authors: Matsumoto Takashi , Usui Shuji
Published: July 2006

The chirality of asymmetric centers of pallescensin-1 (1a), -2 (2a), and -A (4a) was respectively assigned to be (R), (R), and (5S,10S) by the syntheses of la and 4a starting from (R)-(−)-α-cyclocitral (5a).
SYNERGISTIC EFFECT OF Ni–La2O3–Ru CATALYST ON THE DIRECT METHANATION OF CARBON
Authors: Inui Tomoyuki , Ueno Kiyokazu , Funabiki Masaki , Takegami Yoshinobu
Published: July 2006

The three-component catalyst, in which small amounts of La2O3 and Ru are combined with Ni-substrate supported on an active carbon by several percent, exerted a marked synergistic effect on the catalytic methanation of the active carbon. The effect was considered from the viewpoint of a hydrogen-spillover mechanism.
CYCLOADDITION REACTION OF MESOIONIC 3a,6a-DIAZAPENTALENES WITH DIMETHYL ACETYLENEDICARBOXYLATE
Authors: Matsumoto Kiyoshi , Uchida Takane
Published: July 2006

Mesoionic 3a,6a-diazapentalenes (1) and (6) react with two equimolar amounts of dimethyl acetylenedicarboxylate to give the rearranged 1:2 adducts (5) and (9), respectively whose structures are assigned on the basis of spectral data as well as mechanistic considerations.
SYNTHESIS OF dl-15-OXO-13,14-METHYLENEPROSTANOIC ACID
Authors: Inoue Kenji , Amemiya Shigeo , Tajima Yavara , Sakai Kiyoshi
Published: July 2006

The Darzens reaction of 2-(6-methoxycarbonylhexyl)cyclopentanone with ethyl chloroacetate gave the stereoisomeric mixture of the epoxy esters which was connected with the synthesis of 15-oxo-13α, 14α-methyleneprostanoic acid and 15-oxo-13β,14β-methyleneprostanoic acid. Both methylene compounds showed very potent inhibitory activity against 15-hydroxyprostaglandin dehydrogenase.
ENANTIOFACE-DIFFERENTIATING EPOXIDATION OF (1-PHENYLALKYLIDENE)MALONONITRILES WITH MOLECULAR OXYGEN, CATALYZED BY OPTICALLY ACTIVE TERTIARY AMINES
Authors: Nanjo Katsumi , Suzuki Kunio , Sekiya Minoru
Published: July 2006

It has been found that (1-phenylalkylidene)malononitriles are asymmetrically oxidized with molecular oxygen to optically active oxiranes in the presence of chiral tertiary amines such as nicotine and d- or 1-α-(N,N-dimethyl)phenylethylamine.
TRANSITION METAL COMPLEXES WITH A NEW SEXADENTATE β-KETOAMINATO SCHIFF BASE LIGAND
Authors: Hiraki Katsuma , Onishi Masayoshi , Hamada Kazutoshi , Ogata Hitoshi
Published: July 2006

A new Schiff base, N,N′,N″-1,3,4-neopentanetriyltris(4-imino-2-pentanone) was prepared from acetylacetone and 1,1,1-tris(aminomethyl)ethane. This Schiff base served as a trivalent sexadentate N3O3 ligand, which formed mononuclear six-coordinated neutral complexes with Co(III) and Fe(III) ions.
ASYMMETRIC SYNTHESIS OF N-SUBSTITUTED DIMETHYL AZIRIDINE-2,3-DICARBOXYLATE AND THE FORMATION OF OPTICALLY ACTIVE ASPARTIC ACID
Authors: Harada Kaoru , Nakamura Isao
Published: July 2006

Optically active dimethyl aziridine-2,3-dicarboxylate(VI) was asymmetrically synthesized from dimethyl meso- and racemic dibromosuccinate(I and II), dimethyl bromofumarate(III) and dimethyl bromomaleate(IV) by treating with optically active α-methylbenzylamine. The optically active aziridine(VI) was hydrogenolyzed and hydrolyzed to form optically active aspartic acid(VII). The optical purity of VHI reached up to 37%.
PHOTOCHEMICAL REACTION OF PHENYLACETYLENES WITH ETHYLENE TRITHIOCARBONATE. PHOTOCHEMICAL PREPARATION OF 2-THIOXO-1,3-DITHIOLES
Authors: Ohashi Mamoru , Mino Norihisa , Nakayama Noboru , Yamada Shuzo
Published: July 2006

On irradiation diphenyl- and methylphenylacetylene react with ethylene trithiocarbonate to give 4,5-diphenyl- and 4-methyl-5-phenyl-2-thioxo-1,3-dithiole, respectively. Selective excitation of the acetylenes is essential to this reaction.
STRUCTURE OF OXYGLUTINOSONE AND EPIOXYLUBIMIN, STRESS METABOLITES FROM DISEASED POTATO TUBERS
Authors: Katsui Nobukatsu , Yagihashi Fujio , Murai Akio , Masamune Tadashi
Published: July 2006

The structure of oxyglutinosone and epioxylubimin, stress metabolites isolated from diseased potato tubers, was determined to be formulas 1 and 2 on the basis of the chemical and spectral evidence.
THE 14N NMR STUDY OF THE N–C CHELATED PALLADIUM COMPLEXES OF TERT-BUTYL ISOCYANIDE
Authors: Yamamoto Yasuhiro , Uzawa Jun
Published: July 2006

The 14N nmr study of palladium complexes of oxime, N,N-dimethylbenzylamine, and Schiff’s base having tert-butyl isocyanide as a ligand was examined. The 14N linewidths of the complexes were narrow, and increased with decrease of electronegativity of halogen. A plot of linewidths against the chemical shifts showed a linear relationship.
COPPER(II) SALT-ENHANCED VINYL CATION FORMATION IN THE PHOTOLYSIS OF VINYL BROMIDES
Authors: Kitamura Tsugio , Kobayashi Shinjiro , Taniguchi Hiroshi
Published: July 2006

Irradiation of both 1,1-diphenyl-2-bromopropene(1a) and -ethylene (1b) in methanol in the presence of copper(II) salt resulted in the great increase of the yield of ionic products when compared to that without the salt. This suggests that cupric salt reacts with the vinyl radical, which is escaped from the solvent cage, to give ionic species via vinylcopper intermediate (8).
FLUORESCENCE OF PROFLAVINE AND 9-AMINOACRIDINE BOUND TO DNA: EFFECT OF DNA BASE COMPOSITION
Authors: Kubota Yukio , Hirano Kouji , Motoda Yuko
Published: July 2006

The analysis of fluorescence quantum yields reveals that bound proflavine does not fluoresce unless it is intercalated between two adjacent AT pairs. The results of 9-aminoacridine suggest that two adjacent AT pairs next to GC pairs may be still quenching sites for the dye or the heterogeneity of the dye binding may occur.
MORACIN C AND D, NEW PHYTOALEXINS FROM DISEASED MULBERRY
Authors: Takasugi Mitsuo , Nagao Shigemitsu , Ueno Shoji , Masamune Tadashi , Shirata Akira , Takahashi Kokichi
Published: July 2006

Two antifungal compounds, moracin C and D, have been isolated from fungus-infected cortex and phloem tissues of mulberry shoots and their structures have been determined to be formulas 3 and 5 on the basis of the spectral and chemical evidence, respectively.
STILBENE PHYTOALEXINS FROM DISEASED MULBERRY
Authors: Takasugi Mitsuo , Muñoz Liliana , Masamune Tadashi , Shirata Akira , Takahashi Kokichi
Published: July 2006

Two stilbene phytoalexins were isolated from fungus-infected xylem tissue of mulberry shoots and characterized as trans-2,3′,4,5′-tetrahydroxystilbene (1, oxyresveratrol) and its 4′-(3-methyl-2-butenyl) derivative 2.
ASYMMETRIC SYNTHESIS OF α-HYDROXY ALDEHYDES
Authors: Mukaiyama Teruaki , Sakito Yoji , Asami Masatoshi
Published: July 2006

An asymmetric synthesis of α-hydroxy aldehydes was achieved in high optical yields starting from a keto aminal, prepared from phenylglyoxal and (S)-2-(anilinomethyl)pyrrolidine. By treating the keto aminal with the Grignard reagents and the hydrolysis of resulting hydroxy aminals, α-hydroxy aldehydes were obtained in 94–95% optical yields.
THE SESQUITERPENES OF CACALIA SPECIES: 8-OXOCACALOL AND THE STEREOCHEMISTRY OF CACALONE EPIMERS
Authors: Omura Kanji , Nakanishi Mikihiko , Takai Kunihiro , Naya Keizo
Published: July 2006

A new sesquiterpene has been isolated from Cacalia delphiniifolia Sieb. et Zucc. and its structure has been assigned to 8-oxocacalol (I) by physical and chemical methods. Cacalone (VIb) and the C-4 epimer (VIa) have been first obtained from the natural source (the above plant), and also by photosensitized oxygenation or autoxidation of cacalol (II). The stereochemistry of the epimers was established by comparisons of physical and chemical properties between the isomers and their acetates (VIIb and VIIa).
IMMOBILIZATION OF ENZYMES WITH USE OF PHOTOSENSITIVE POLYMERS BEARING STILBAZOLIUM GROUPS
Authors: Ichimura Kunihiro , Watanabe Shoji
Published: July 2006

Reaction of poly[(2-chloroethyl vinyl ether)-co-(N-vinylpyrrolidone)] with γ-stilbazole afforded water-soluble photosensitive polymer, in which enzymes were entrapped on irradiation. The activities of entrapped invertase, glucoamylase and catalase were 30, 60, and 35%, respectively.
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

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

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

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

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

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

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

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

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

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

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

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

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 < secondary < 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.