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Manabu Igawa, Kiyohiko Saitou, Hiroki Kasai, Masao Tanaka, Takeo Yamab ...
1985 Volume 14 Issue 7 Pages
861-864
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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A liquid membrane containing dibenzo-18-crown-6 was applied to electrodialysis and was found to be effective for selective transport of potassium ions. The selective cation transport was caused by the carrier relay mechanism and the current density increased with increasing crown ether concentration and increasing applied voltage.
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Joaquín de Pascual Teresa, Joaquín R. Moran, Manuel Gran ...
1985 Volume 14 Issue 7 Pages
865-868
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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The structure of the title compound has been established on the basis of NMR (1D and 2D COSY, NOESY, one bond and long range HCCORR) and CD spectra. The name thapsane is suggested for the novel natural skeleton (1
R,6
R,8
R,9
R)-1,2,2,6,8,9-hexamethylbicyclo[4.3.0]nonane.
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Tooru Inoue, Toshihiro Yamase
1985 Volume 14 Issue 7 Pages
869-872
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Photoelectrochemical cell using silicon carbide and Pt electrodes can split water into H
2 and O
2 without any external bias. Maximum photovoltage was ca. 0.45 V for a <p-SiC/H
2O/Pt> photocell and 2.2V for a <p-SiC/H
2O/n-SiC> photocell. Energy conversion efficiency to H
2 was ca. 0.4% for irradiation with a 500 W Xe lamp.
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Michihiko Noguchi, Noriyuki Tanigawa, Takashi Tamamoto, Shoji Kajigaes ...
1985 Volume 14 Issue 7 Pages
873-876
Published: July 05, 1985
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4
H-Benzo[
hi]pyrrolo[2,1,5-
cd]indolizin-4-one, an analog of phenalenone, is obtained By a one-pot oxidation of 5,6-dihydro-4
H-benzo[
hi]pyrrolo[2,1,5-
cd]indolizine with DDQ in aqueous dioxane. Its characteristic electronic feature is also described, which is different inherently from that of phenalenone or 3
H-benz[
cd]azulen-3-one.
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Makoto Nitta, Tomoshige Kobayashi
1985 Volume 14 Issue 7 Pages
877-880
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Upon treatment with [Mo(CO)
6] or [Fe
2(CO)
9], phenyl-substituted 1,3-oxazepines undergo the C-2-O and C-7-O bond cleavage to give pyridine and pyrrole derivatives via a coordinated pyridine-2,3-oxide.
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Hironori Arakawa, Takakazu Fukushima, Masaru Ichikawa, Shoshiro Natsus ...
1985 Volume 14 Issue 7 Pages
881-884
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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A high performance catalyst for ethanol production -has been developed. Ethanol was produced with more than 50% selectivity from syngas over Rh–Ti–Fe–Ir/SiO
2 under the condition of 50 atm and 260 °C. The roles of additives were discussed from the point of the reaction behavior and physical property of this catalyst.
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Fumio Toda, Koichi Tanaka
1985 Volume 14 Issue 7 Pages
885-888
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Hundred per cent optically pure bicyclic lactones and bicyclic ketones were easily obtained By complexation method with optically active 1,6-bis(2-chlorophenyl)-1,6-diphenylhexa-2,4-diyne-1,6-diol.
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Takashi Yamazaki, Nobuo Ishikawa
1985 Volume 14 Issue 7 Pages
889-892
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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(
E)-3,3,3-trifluoro-1-propenyl phenyl sulfoxide as the building block for the introduction of trifluoromethyl group was prepared from ethyl trifluoroacetate in three steps (72% yield) and high diastereoselectivity was observed for the Michael reaction of this compound with various enolate anions.
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Akito Ishida, Susumu Toki, Setsuo Takamuku
1985 Volume 14 Issue 7 Pages
893-896
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Photoirradiation of a methanol solution of α-methylstyrene and EUCl
3·6H
2O with Pyrex filter resulted in the formation of 2,3-dimethyl-2,3-diphenylbutane and 3,4-dimethyl-3,4-diphenylpentanol in high yields. This reaction was initiated By the excitation of Eu(III)–CH
3OH CT-bands and followed By a successive photochemical reaction of Eu(II) ions formed.
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Kaku Uehara, Keisuke Shibata, Makoto Tanaka
1985 Volume 14 Issue 7 Pages
897-900
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Upon immersing into water, the chlorophyll
a(chl
a)/poly vinyl acetate) film cast from dioxane or dimethyl sulfoxide (DMSO) showed a transformation from chl
a-dioxane aggregate (692 nm) to monomeric(668 nm) or from chl
a-DMSO aggregate (695 nm) to (chl
a·2H
2O)
n(746 nm), respectively. The platinum electrodes coated By the two types of transformed films showed the opposite direction of photo-induced potential shift.
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Junzo Otera, Toru Yano, Rokuro Okawara
1985 Volume 14 Issue 7 Pages
901-904
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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The mechanism of urethane formation catalyzed By tetraorganodistannoxanes was investigated. The
119Sn NMR spectra and the model reaction between methanol and phenyl isocyanate revealed that the formation of the alkoxy distannoxanes is the initial step.
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Akira Nishinaga, Toshiyuki Kondo, Teruo Matsuura
1985 Volume 14 Issue 7 Pages
905-908
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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The oxygenation of cobalt(II) Schiff base complexes in alcohols resulted in irreversible oxidation to give the corresponding alcoholatocobalt(III) complexes, which were converted to hydroxocobalt(III) species By treatment with water. Kinetic studies on the oxidation suggest a mechanism involving rate determining proton transfer from alcohols to cobalt-dioxygen adducts.
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Isao Mochida, Kinya Sakanishi, Yozo Korai, Hiroshi Fujitsu
1985 Volume 14 Issue 7 Pages
909-912
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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A high hydrodenitrogenation (86%) of acridine on a Ni–Mo/Al
2O
3 catalyst was achieved By successive reactions at 370 °C for 2 h and 420 °C for 3 h, respectively, while the single stage reaction at 420 °C for 5 h removed only 67% nitrogen. The effective hydrodenitrogenation is postulated due to the extensive hydrogenation in the first stage and C–N bond fission in the second stage.
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Katsuhiko Takagi, Toshio Fujioka, Yasuhiko Sawaki, Hiizu Iwamura
1985 Volume 14 Issue 7 Pages
913-916
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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TiO
2-sensitized photooxidation of benzenes has been studied to disclose the origin of the ring hydroxylating species. An
18O-tracer study using
18O
2 gas revealed that the hydroxyl group of phenols comes essentially from molecular oxygen at higher pH region. At lower pH, however, the oxygen atom in phenols originates mostly from solvent water. These findings are compatible with two different mechanisms proposed By Osa et al. and Tokumaru et al.; that is, the major pathway changes with pH.
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Yasuhiro Shimizu, Muneharu Shimabukuro, Hiromichi Arai, Tetsuro Seiyam ...
1985 Volume 14 Issue 7 Pages
917-920
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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The humidity sensitivities of SrSnO
3 and BaSnO
3 were enhanced slightly By means of calcining their hydroxides, which were prepared by a coprecipitation method. The partial substitution of the A site element of the perovskite-type oxides with lanthanum was more useful for the enhancement of the sensitivity. The highest sensitivity was found in Sr
0.95La
0.05SnO
3 among the specimens studied.
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Hiroshi Hamana, Tsutomu Sugasawa
1985 Volume 14 Issue 7 Pages
921-924
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Allyltrimethylsilane reacted with various nitriles in the presence of boron trichloride, giving after hydrolysis β,γ-unsaturated ketones in high yields. The reactions of substituted allyltrimethylsilanes and intramolecular reaction of allylic trimethylsilane with nitrile were also studied.
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Hirofumi Kawazumi, Teiichiro Ogawa
1985 Volume 14 Issue 7 Pages
925-928
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Combination of electron-impact excitation and laser-induced fluorescence offers a useful technique for a detection of the dissociation fragments. The rotational temperatures of CN, OH, and N
2+ produced By controlled electron impact on CH
3 CN, H
2O, and N
2O were 550±20, 560±100, and 400±20 K, respectively.
View full abstract
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Tsugio Kitamura, Sumiya Miyake, Shinjiro Kobayashi, Hiroshi Taniguchi
1985 Volume 14 Issue 7 Pages
929-930
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Irradiation of triarylchloroallenes in methanol afforded 1,3,3-triaryl-3-methoxypropynes, suggesting the intervention of triarylallenyl cations. Irradiation of triphenylchloroallene in ethanol and 2-propanol gave the similar results but the irradiation in
t-butyl alcohol gave only the products from triphenylallenyl radical.
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Katsuhiko Inomata, Yasue Murata, Hisatoyo Kato, Yuhko Tsukahara, Hidek ...
1985 Volume 14 Issue 7 Pages
931-934
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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The treatment of allylic
p-tolyl sulfones with a catalytic amount of [Pd(PPh
3)
4] gave the 1,3-rearrangement products in high yields. A convenient method for the preparation of α,β-unsaturated ketones using [Pd(PPh
3)
4] as a catalyst from the 1,3-rearrangement products, 2-tosylhomoallyl alcohols, is also described.
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Akihiko Matsuo, Ken-ichiro Yoshida, Katsumi Uohama, Shûichi Haya ...
1985 Volume 14 Issue 7 Pages
935-938
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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The structures and conformations of 6β,12β-dihydroxy-3
E,7
E-dolabelladiene 6-
p-bromobenzoate and acetoxyodontoschismenol 3S,4S-epoxide have been established By X-ray crystallographic analysis. The original assignment of the stereochemistry at C-12 of (+)-acetoxyodontoschismenol has been revised.
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Toshikazu Takata, Mingjung Kuo, Yoshiharu Tamura, Yoshio Kabe, Wataru ...
1985 Volume 14 Issue 7 Pages
939-942
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Synthesis of optically active 2-substituted and unsubstituted 1-aza-3-thiabicyclo[3,1.0]hexanes are accomplished By intramolecular cyclization of 4-hydroxymethylthiazolidines which are prepared By the reaction of
L-cysteine methyl ester with appropriate aldehydes followed By reduction of ester function.
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Reiji Tanaka, Satoru Toyama, Sachio Murakami
1985 Volume 14 Issue 7 Pages
943-944
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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The heat capacities for the binary mixtures of (
n-C
nH
2n+1OH +
n-C
7H
16) for n=1–6, and (
n-C
4H
9OH + C
6H
6) have been determined at 298.15 K. A sharp and high peak appears in the partial molar heat capacities of alcohol, C
p,1, in the heptane solution at a high dilution of alcohol. The values C
p,1∞, at the infinite dilution and C
p,1* at the pure state change linearly with n of alcohol. The results are related to the self-association of alcohol in the mixture.
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Koji Chiba, Hideyuki Tagaya, Taku Yamauchi, Yoshitaro Thukahara
1985 Volume 14 Issue 7 Pages
945-948
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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The effect of solvent on bibenzyl conversion depends on the nature of solvent. Triphenylmethane, diphenylmethane, and diphenylamine are poor hydrogen donor solvents. But, when these compounds were used as solvent, bibenzyl conversion was markedly enhanced, and toluene, stilbene and adducts were formed. Moreover, when a proper amount of tetralin was mixed with the above solvent, toluene was solely obtained in reasonable yield.
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Oyo Mitsunobu, Miyako Takahashi, Hiroshi Seki, Makoto Arai, Fumiko Yas ...
1985 Volume 14 Issue 7 Pages
949-952
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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The reagent formed By the reaction of 2-chlorophenyl phosphorodichloridate with 2 molar amounts of 5-nitrobenzotriazole was allowed to react successively with nucleosides having free 3′-hydroxyl groups and nucleosides having free 5′-hydroxyl groups affording the corresponding dinucleoside phosphates in 63–97% yields.
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Shu Kobayashi, Masahiro Murakami, Teruaki Mukaiyama
1985 Volume 14 Issue 7 Pages
953-956
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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In the presence of a catalytic amount of trityl perchlorate, 1,5-dicarbonyl compounds, the Michael adducts, are obtained in high yields by the reaction of silyl enol ethers with α,β-unsaturated ketones. The intermediate adducts, the synthetically valuable silyl enol ethers, are also isolated in high yields.
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Satomi Niwayama, Shigeyuki Dan, Yoshinobu Inouye, Hiroshi Kakisawa
1985 Volume 14 Issue 7 Pages
957-960
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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1,3-Dipolar cycloaddition of nitrones on several allyl silanes, allyl ethers, and allyl alcohol was investigated. The silicon atom in dipolarophiles controlled the regioselectivity in favor for 5-(silylmethyl)isoxazolidines, while the oxygen atom for 4-(alkoxymethyl)isoxazolidines.
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Yong Li, Hideyuki Tomoda, Kunihiko Tajima, Kazuhiko Ishizu, Nagao Azum ...
1985 Volume 14 Issue 7 Pages
961-964
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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In the presence of the optimum amount of water, the ESR spectra of copper(II) complexes of 5-oxygen donors observed in BF
3-etherate solution revealed a typical g-anisotropy ascribed to the 3d
z2 type copper(II) complex. Based on the detection of superhyperfine splittings due to
17O isotope, the axial ligation of water molecule was confirmed, and the coordination geometry of the complex was assumed.
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Hironobu Hashimoto, Nobuya Kawauchi, Juji Yoshimura
1985 Volume 14 Issue 7 Pages
965-968
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Hexopyranosides having a
gem-dimethyl group in the pyranose ring were synthesized By reductive cleavage of spiro-cyclopropane derivatives and By addition of methyl cuprates to methyl-branched enolone derivatives.
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Eishun Tsuchida, Etsuo Hasegawa, Yoh-ichi Matsushita, Kiyoshi Eshima, ...
1985 Volume 14 Issue 7 Pages
969-972
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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By incorporating the lipid-heme in the polymerized liposome, conc. and mechanically stable heme solution ([heme] = 10 mM) was prepared; this solution (100 ml) could bind molecular oxygen (ca. 23 ml) reversibly under physiological conditions even in a high speed flowing system.
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Gen-etsu Matsubayashi, Ryuichi Shimizu, Toshio Tanaka
1985 Volume 14 Issue 7 Pages
973-976
Published: July 05, 1985
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The title salt has been obtained By electrolysis of dibenzotetrathiafulvalene in a benzonitrile solution containing dichlorodimethyltin(IV) and benzyltriphenylphosphonium chloride. The X-ray crystal analysis has revealed the presence of a DBTTF columnar structure and a novel trimerized tin(IV) anion [Sn
3(CH
3)
6Cl
8]
2−. Electrical and spectroscopic properties also are described.
View full abstract
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Teruaki Mukaiyama, Hitoshi Nagaoka, Masahiro Murakami, Masahiro Ohshim ...
1985 Volume 14 Issue 7 Pages
977-980
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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In the presence of a catalytic amount of trityl perchlorate or diphenylboryl triflate, acetals react smoothly with allyltrimethylsilanes to give the corresponding homoallyl ethers in good yields with good regio- and stereoselectivities.
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Kazuhiro Toyoda, Hiroki Haraguchi
1985 Volume 14 Issue 7 Pages
981-984
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Rare earth elements in the standard rock samples such as GSJ JG-1, GSJ JB-1, and USGS AGV-1 have been determined simultaneously by inductively coupled plasma atomic emission spectrometry. It has been found that heavy rare earth elements in JG-1 provide lower values when it is dissolved by the acid digestion method.
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Kenjiro Hattori, Keiko Takahashi
1985 Volume 14 Issue 7 Pages
985-988
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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A transphosphorylation among AMP, ADP, and ATP in a neutral aqueous solution with MgCl
2 was examined in the presence of heptakis-(2,6-dimethyl)-β-cyclodextrin or heptakis-(2,3,6-trimethyl)-β-cyclodextrin. Adding methylated cyclodextrins was found to facilitate both forward and reversed reaction according to Eq.2 with an equilibrium constant of approximate unity.
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Kiyomi Kakiuchi, Shuichi Kumanoya, Masaki Ue, Yoshito Tobe, Yoshinobu ...
1985 Volume 14 Issue 7 Pages
989-992
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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The functionalized tricyclo[6.3.0.0
1,5]- and [5.3.1.0
1,5]-undecanes are newly synthesized from
endo- and
exo-tricyclo-[6.3.0.0
1,6]undecan-5-ols by skeletal rearrangements using the solvolyses of their tosylates. Furthermore, a novel biologically active compound is derived readily from the rearrangement products.
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Akira Matsuura, Akira Nishinaga, Yoshikatsu Ito, Teruo Matsuura
1985 Volume 14 Issue 7 Pages
993-996
Published: July 05, 1985
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9-
t-butyl-10-methyl-9,10-endotrioxy-9,10-dihydroanthracene underwent reductive decomposition readily with transition metal compounds having one-electron reducibility to result unexpectedly in the specific cleavage of the shorter O–O bond close to the
t-butyl group in the trioxide finally giving rise to 10-methyloxanthrone and
t-butyl alcohol. A plausible mechanism is discussed.
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Masanori Kosugi, Takashi Sumiya, Kenji Ohhashi, Hiroshi Sano, Toshihik ...
1985 Volume 14 Issue 7 Pages
997-998
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Direct transformation of aryl bromides to benzylic alcohols by means of hydroxymethyltributyltin in the presence of palladium complex was attained in moderate yields, although the catalytic efficiencies were rather low, and the reaction could not be applied to aryl bromides having strong electron-withdrawing group. These problems were solved by using the trimethylsilyl-protected tin compound.
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Yoko Nambu, Takeshi Endo
1985 Volume 14 Issue 7 Pages
999-1002
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Kinetic resolution of racemic
N-hydroxyamino acids by the reduction with optically active thiols and a catalytic amount of ferrous ion gave optically active amino acids presumably through enantiodifferentiating coordination of substrates to thiol-Fe(II) complexes.
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Yo Shimizu, Shigekazu Kusabayashi
1985 Volume 14 Issue 7 Pages
1003-1004
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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3-(2-Hydroxy-4-alkoxybenzylideneamino)dibenzofurans(
1) were found to be smectic C(S
C) mesogens, which do not contain an “alkyl-core-alkyl” type structure. This implies that the molecular symmetry as seen in the alkyl-core-alkyl structure is a favorable factor but not always required for the appearance of S
C phase and that an appropriate magnitude of the lateral dipole moment is required for the core moiety in the case of an unsymmetrical molecule.
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Hideyuki Matsumoto, Masahiko Minemura, Kazutoshi Takatsuna, Yoichiro N ...
1985 Volume 14 Issue 7 Pages
1005-1006
Published: July 05, 1985
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The entitled compound was synthesized and its molecular structure was determined by X-ray crystallography. Its unusual properties include the lowest energy CT band with TCNE yet observed for cyclotetrasilanes and the easiness of the decomposition of the Si
4 framework on electron-impact fragmentation and thermolysis.
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Shin-ichi Inoue, Masato Osada, Kinko Koyano, Hidemasa Takaya, Ryoji No ...
1985 Volume 14 Issue 7 Pages
1007-1008
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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A novel direct synthesis of optically active citronellol has been investigated by asymmetric hydrogenation of geraniol and nerol catalyzed by various BINAP–Rh(I) complexes.
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Junji Ichikawa, Teruaki Mukaiyama
1985 Volume 14 Issue 7 Pages
1009-1012
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Bis(2-pyridinethiolato)tin(II), a stable stannylene, effects oxidative addition to α-dicarbonyl compounds to generate tin(IV) enediolates, which in turn react with aldehydes to give α,β-dihydroxyketones in good yields with moderate diastereoselectivities.
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Akitoshi Seiyama, Noboru Yoshida, Masatoshi Fujimoto
1985 Volume 14 Issue 7 Pages
1013-1016
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Kinetic studies on the inclusion reactions of the title azo compounds with α-cyclodextrin (α-CD
x) in aqueous solution by means of the stopped-flow method reveal a two-step inclusion mechanism involving a fast binding process of the guest compounds to α-CD
x followed by the slow intramolecular transformation of the intermediate inclusion complex. Activation parameters for each step were determined.
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Takumi Konno, Sen-ichi Aizawa, Ken-ichi Okamoto, Jinsai Hidaka
1985 Volume 14 Issue 7 Pages
1017-1020
Published: July 05, 1985
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The title complexes, Δ
LLLΔ
LLL- and Λ
LLLΛ
LLL-[Co
III{Co
III(
L-cys-
N,
S)
3}
2]
3− (L-cys = L-cysteinate), were stereoselectively prepared by the reaction of fac(S)-[Co(
L-cys-
N,
S)
3]
3− with [CoCl(NH
3)
5]
2+ and Co
2+, respectively. The Δ
LLLΔ
LLL and Λ
LLLΛ
LLL isomers were characterized from their absorption, CD, and
13C NMR spectra.
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Takaari Yumoto, Kiyoshi Hayakawa, Kaoru Kawase, Hiromi Yamakita, Hiros ...
1985 Volume 14 Issue 7 Pages
1021-1024
Published: July 05, 1985
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The photoisomerization of 7-substituted norbornadiene-cyclodextrin inclusion complexes, in which the substituents are t-butoxyl, acetoxyl, and hydroxyl groups, gave 7-substituted quadricyclene-cyclodextrin inclusion complexes.
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Masaji Nakagawa, Mitsuya Maruki, Ken-ichi Watanabe
1985 Volume 14 Issue 7 Pages
1025-1028
Published: July 05, 1985
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Inclusion compounds of α- and β-cyclodextrins(CD) with p-nitrobenzaldehyde were prepared. They underwent the aldol reactions with acetone in the presence of Zn
2+ complexes of
L-tyrosine ester to afford an enantiomeric excess aldol-type product. The reactions of the β-CD compound were superior to that of the α-CD one both in reactivity and asymmetric induction.
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Seiji Shinkai, Midori Ishihara, Osamu Manabe, Akira Mizumoto, Yoshihit ...
1985 Volume 14 Issue 7 Pages
1029-1032
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Dicyclohexyl-18-crown-6 was “polymerized” on an acetylcellulose membrane by a glow discharge plasma. The membrane prepared under proper conditions showed the K
+ selectivity in ion-transport.
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Seiji Shinkai, Hiroshi Koreishi, Seiichi Mori, Takaaki Sone, Osamu Man ...
1985 Volume 14 Issue 7 Pages
1033-1036
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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Water-soluble calix[6]arenes bearing both acidic protons and sulfonate groups were synthesized. They catalyzed a hydration reaction of 1-benzyl-1,4-dihydronicotinamide (BNAH) according to Michaelis-Menten kineticts and the rate constants were greater by 426–1220 fold than those for noncyclic analogues. Fluorescence data supported the complexation of BNAH with these water-soluble calixarenes. These findings indicate that calixarenes serve as a new starting material to design functionalized host molecules.
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Gunzi Saito, Tadashi Sugano, Hideki Yamochi, Minoru Kinoshita, Kokichi ...
1985 Volume 14 Issue 7 Pages
1037-1040
Published: July 05, 1985
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It was found that an organic superconductor can be synthesized not only by electrocrystallization method but also by diffusion method between BEDT-TTF and n-Bu
4N·IBr
2. The superconducting phase β-(BEDT-TTF)
2IBr
2 shows the critical temperature of the superconducting transition at 2.0–2.3 K.
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Rei Matsueda, Yuichiro Yabe, Hiroshi Kogen, Susumu Higashida, Hiroyuki ...
1985 Volume 14 Issue 7 Pages
1041-1044
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
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The phenylalanine residue in the C-terminal sequence of angiotensin II was found to be important for the design of renin inhibitors. 1-Naphthyl-alanine(Nal(1))-containing tripeptide analogues such as benzyloxycarbonyl-Nal (1)-His-Leucinal (ES-188) and benzyloxycarbonyl-Nal(1)-His-(3S,4S)-4-amino-3-hydroxy-6-methylheptanoic acid (Statine) 2(S)-methylbuthylamid (ES-254) showed high potency and specificity to human renin.
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Nobuharu Iwasawa, Huamin Huang, Teruaki Mukaiyama
1985 Volume 14 Issue 7 Pages
1045-1048
Published: July 05, 1985
Released on J-STAGE: March 27, 2006
JOURNAL
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The tin(II) enolate is generated from 3-acylthiazolidine-2-thione with β-alkoxy or β-amino functionality on treatment with stannous triflate in the presence of
N-ethylpiperidine. The enolate further reacts with aldehyde to afford the aldol product with high syn-stereoselectivity. The aldol product thus produced is stereospecifically converted to β-lactam derivative with hydroxyethyl side chain.
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