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Toshikazu Hirao, Ken-ichiro Hayashi, Jiro Motoyoshiya, Yoshiki Ohshiro ...
1981 Volume 10 Issue 9 Pages
1197-1198
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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Haloketenimines are prepared by treatment of 2,2-dihaloaziridines with triethylamine in acetonitrile.
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Otohiko Tsuge, Hiroshi Shimoharada, Michihiko Noguchi
1981 Volume 10 Issue 9 Pages
1199-1202
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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Benzothiazolium
N-phenacylide reacted with methylenecyclopropenes having an acyl group on the 4-position to give 3a,11a-dihydro-5a
H-furo[3′,2′:2,3]pyrido[6,1-
b]benzothiazole derivative via an intermediary 3-butadienylbenzothiazolium betaine. The reaction of the ylide with a methylenecyclopropene bearing two cyano groups on the 4-position in THF gave a cyclobutane together with benzothiazole, whereas a 3-butadienyl-2-ethoxybenzothiazoline derivative was obtained in the reaction in EtOH.
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Seiji Shinkai, Takaharu Tsuno, Osamu Manabe
1981 Volume 10 Issue 9 Pages
1203-1206
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
JOURNAL
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The reduction of
N-methylacridinium ion by 3-aminocarbonyl-
N-benzyl-1,4-dihydroquinoline showed the isotope effect discrepancy. The result supports the multi-step hydrogen transfer mechanism.
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Naotoshi Nakashima, Hiroshi Fukushima, Toyoki Kunitake
1981 Volume 10 Issue 9 Pages
1207-1210
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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Large circular dichroism is induced when Methyl Orange is bound to the bilayer membrane of chiral dialkyl amphiphiles and the magnitude of the induced circular dichroism is changed drastically by the gel-to-liquid crystal phase transition and the chemical structure of the membrane.
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Kenkichiro Kobayashi, Yoshihiro Aikawa, Mitsunori Sukigara
1981 Volume 10 Issue 9 Pages
1211-1212
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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An expression of the potential dependence of cathodic current at an n-type semiconductor tunnel electrode is derived. By applying a tunnel electrode, the rearrangement energy can be determined without ambiguity from the plot of the transfer coefficient against electrode potential.
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Kazuo Achiwa, Minoru Sekiya
1981 Volume 10 Issue 9 Pages
1213-1216
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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A novel 1,3-cycloaddition of intermediaries derived from
N-(benzylidene)trimethylsilylmethylamine and acyl chlorides to conjugated olefins and acetylenes gave pyrrolidine and 2,5-dihydropyrrole derivatives, respectively.
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Tatsuya Shono, Hiroshi Hamaguchi, Ikuzo Nishiguchi, Manji Sasaki, Tets ...
1981 Volume 10 Issue 9 Pages
1217-1220
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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Some γ-butyrolactone derivatives have been synthesized by the reaction of dimethyl maleate with carbonyl compounds in the presence of active zinc compound.
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Hiroshi Takaku, Tadaaki Nomoto, Kenji Kimura
1981 Volume 10 Issue 9 Pages
1221-1224
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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5′-Se-(2-Nitrophenyl)-5′-selenoadenosine (
3) was selectively synthesized by the reaction of adenosine with 2-nitrophenylselenocyanate and tri-
n-butylphosphine. The selenide
3 was oxidized by treatment with excess hydrogen peroxide to the corresponding selenoxide (
4), which readily undergo
syn elimination under mild conditions to give the corresponding 9-(5-deoxy-β-
D-
erythro-pent-4-enofuranosyl)-adenine (
5) in good yield.
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Takahiko Isobe, Yukinao Noda, Kozo Shibata, Takashi Kubota
1981 Volume 10 Issue 9 Pages
1225-1228
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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The structures of two new diterpene glycosides, shikokiaside A and B, isolated from
Rabdosia shikokiana var
shikokiana were elucidated, respectively, by chemical and spectroscopic data.
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Yoshio Takeda, Tetsuro Fujita, Akira Ueno
1981 Volume 10 Issue 9 Pages
1229-1232
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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Six new diterpenoids, leukamenin A, B, C, D, E and F with 15-oxo-
ent-kaurene skeleton were isolated from the leaves of
Rabdosia umbrosa var.
leucantha f.
Kameba and their structures were deduced from chemical and spectral evidence.
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Shunzo Yamamoto, Shuzo Matsuda, Chihiro Ozaki, Norio Nishimura
1981 Volume 10 Issue 9 Pages
1233-1236
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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The mercury- and cadmium-photosensitized reactions of γ-butyrolactone have been studied. The gaseous products obtained in the mercury-photosensitized reaction were carbon dioxide, cyclopropane, and propylene. On the other hand, the products obtained in the cadmium-photosensitized reaction were carbon monoxide and ethylene.
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Kazuhiko Mizuno, Hiroshi Ueda, Yoshio Otsuji
1981 Volume 10 Issue 9 Pages
1237-1240
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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The [2+2] photocycloaddition between aryl vinyl ethers and alkyl vinyl ethers occurs upon irradiation of acetonitrile solutions in the presence of an electron acceptor such as 1,4-dicyanobenzene, giving predominantly cis head-to-head cycloadducts. The mechanistic features of this photoreaction are described.
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Bongkoch Tarnchompoo, Yodhathai Thebtaranonth, Suchada Utamapanya, Pra ...
1981 Volume 10 Issue 9 Pages
1241-1242
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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The ketene-anthracene adduct
1 serves as a good precursor in the synthesis of substituted acetylenes, in which the key step is the retro Diels–Alder reaction.
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Kiyonori Shinoda, Kensei Yasuda
1981 Volume 10 Issue 9 Pages
1243-1244
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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The rearrangement of 1,3-bromochloropropane (BCP) on activated alumina was carried out at 160 – 280°C. This reaction proceeded as follows. Br(CH
2)
3Cl \leftrightarrows Br(CH
2)
3Br + Cl(CH
2)
3Cl It was suggested that the acidic sites of alumina played an important role in the rearrangement of halogen atom.
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Mayumi Yamazaki, Masakatsu Shibasaki, Shiro Ikegami
1981 Volume 10 Issue 9 Pages
1245-1248
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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A synthetic route to
dl-hirsutic acid and an improved synthesis of
dl-9(0)-methanoprostacyclin, both of which employ the 1,2-carbonyl transposition as a key step, are described.
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Yasuo Kikuzono, Setsuko Kagami, Shuichi Naito, Takaharu Onishi, Kenzi ...
1981 Volume 10 Issue 9 Pages
1249-1252
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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Novel palladium catalysts prepared from M
2PdCl
4(M=alkali metals) type complexes have been studied, which produce methanol selectively from CO–H
2 mixture below atmospheric pressure.
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Koichi Eguchi, Yuji Toyozawa, Keiichi Furuta, Noboru Yamazoe, Tetsuro ...
1981 Volume 10 Issue 9 Pages
1253-1256
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
JOURNAL
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Quantitative ir spectroscopic studies showed that the reduction of K
3PMo
12O
40 with H
2 in the early stage proceeded by consuming two bridging oxygens per Keggin anion. The process was accompanied by the stoichiometric formation of Mo
5+ according to the XPS measurements. It was suggested that terminal oxygens were removed after two oxygens per Keggin anion were taken off.
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Tsutomu Sakai, Hideo Naoki, Kazutoshi Takaki, Hiromu Kameoka
1981 Volume 10 Issue 9 Pages
1257-1258
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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The structures of semburin and isosemburin isolated from the volatile oil of
Swertia japonica Makino have been determined as
1 and
3, respectively. It is the first time that the 2,8-dioxabicyclo[3.3.1] nonane skeleton has been encountered in natural products.
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Tomoya Kitazume, Nobuo Ishikawa
1981 Volume 10 Issue 9 Pages
1259-1260
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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α-Fluoro-α,β-unsaturated esters were prepared by one-pot reaction between aldehydes or ketones and diethyl chloromalonate in the “spray-dried” potassium fluoride–sulfolane system.
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K. Muthuramu, V. Ramamurthy
1981 Volume 10 Issue 9 Pages
1261-1264
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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Preferential yield of ring expansion and rearrangement products through α-cleavage of tetramethyl-3-thio-1,3-cyclobutanedione (
1) and 3-mercapto-2,2,4-trimethyl-3-pentenoic acid β-(thio lactone) (
2) involving diradical and carbene has been observed upon photolysis of
1 and
2.
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Yoshiki Okamoto, Toshio Azuhata, Hiroshi Sakurai
1981 Volume 10 Issue 9 Pages
1265-1268
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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In the presence of chlorotrimethylsilane, trialkyl phosphite reacts smoothly with alkyl acrylates to give dialkyl 3-alkoxy-3-(trimethylsiloxy)-2-propenephosphonates in good yields.
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Hiroto Kidokoro, Masaru Sato, Seiji Ebine
1981 Volume 10 Issue 9 Pages
1269-1270
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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The bromination products of 2-methoxy- and 2-acetamido-3-bromobiphenylenes were not the biphenyl derivatives (
3a) and (
3b), which were previously assigned by McOmie et al,, but the benzocyclooctatetraene derivatives (
2a) and (
2b), respectively.
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Hisashi Fujihara, Shunichi Fuke, Masakuni Yoshihara, Toshihisa Maeshim ...
1981 Volume 10 Issue 9 Pages
1271-1272
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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Electron transfer processes in the reaction of phenothiazine and 10-methylphenothiazine with 2,2′-azobisisobutyronitrile have been examined by UV and ESR spectroscopies. The reaction was found to proceed via one electron transfer from phenothiazine derivatives to a cyanoisopropyl radical.
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Fumio Yoneda, Miyuki Motokura, Masaki Otagiri
1981 Volume 10 Issue 9 Pages
1273-1276
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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Treatment of 5-nitro-1,3,6-trinitrouracil with aryl aldehydes in the presence of piperidine causes the condensation to the 5-nitro-6-styryluracil derivatives, followed by the intramolecular cyclization including piperidine-catalyzed oxidation-reduction to give rise to the corresponding 1,3-dimethyl-7-hydroxypyrrolo[3,2-
d]pyrimidine-2,4(1
H,3
H)-dione (9-hydroxy-9-deazatheophylline) derivatives in a single step. Some properties of these compounds are discussed.
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Yasuji Yamada, Den-ichi Momose
1981 Volume 10 Issue 9 Pages
1277-1278
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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Chlorotris(triphenylphosphine)cobalt(I) is an effective agent for the reductive coupling of benzylic halides under mild and neutral conditions.
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Norio Miura, Kazuyuki Gomyo, Noboru Yamazoe, Tetsuro Seiyama
1981 Volume 10 Issue 9 Pages
1279-1282
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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The polytetrafluoroethylene-bonded carbon electrode on which silver was loaded by “ion exchange method” gave 300 mA/cm
2 at −0.12 V (vs. Hg/HgO) for the reduction of oxygen in 9 mol/dm
3 NaOH at 80 °C, and it may be useful for the oxygen depolarized chlor-alkali electrolytic cell. The high activity of the electrode was found to come from the fine dispersion of silver and the oxidation-treatment of carbon surface.
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Yukio Masaki, Kazuhiko Sakuma, Kinji Hashimoto, Kenji Kaji
1981 Volume 10 Issue 9 Pages
1283-1284
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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(−)-Evodone, an optically active natural furano-monoterpene was synthesized from R-(+)-citronellic acid.
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Masatake Niwa, Tetsuji Endo, Shigeki Ogiso, Hideyuki Furukawa, Shosuke ...
1981 Volume 10 Issue 9 Pages
1285-1288
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
JOURNAL
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Two new pyrones, citreoviridinol and secocitreoviridin, have been isolated from the yellow rice, and their structures also been elucidated on the basis of their spectral data.
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Takeshi Nakai, Kiyoshi Tanaka, Kyo Ogasawara, Nobuo Ishikawa
1981 Volume 10 Issue 9 Pages
1289-1292
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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A novel synthetic method for 2,4-alkadienoic acids from allylic alcohols and 2,2,2-trifluoroethyl phenyl sulfoxide is described which involves the in situ Claisen rearrangement facilitated by the fluorine. This method was applied to the stereocontrolled synthesis of pellitorine, a natural insecticide.
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Hisashi Fujihara, Koji Imaoka, Naomichi Furukawa, Shigeru Oae
1981 Volume 10 Issue 9 Pages
1293-1296
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
JOURNAL
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Tetrakis(alkyl-sulfinylmethyl)methanes serve as highly efficient phase transfer catalysts in S
N2 type displacement reactions of
n-octyl bromide with a few nucleophiles.
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Naoto Hatanaka, Rumiko Abe, Iwao Ojima
1981 Volume 10 Issue 9 Pages
1297-1298
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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A method for oligopeptide synthesis via β-lactam intermediate has been successfully applied to the synthesis of a biologically active pentapeptide, leucine-enkephalin.
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Seizi Kozuka, Shigeru Yamaguchi, Waichiro Tagaki
1981 Volume 10 Issue 9 Pages
1299-1300
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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A kinetic study has been conducted for the reaction of aryloxytrimethylstannane with methanesulfonyl chloride. Substituent effect was found to be dependent on the solvent and obscure solvent effect was observed. A mechanism has been suggested involving nearly concerted four-center transition state.
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Isao Tate, Shuji Oishi
1981 Volume 10 Issue 9 Pages
1301-1304
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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By slow cooling method NdAl
3(BO
3)
4 crystals were grown from the high-temperature solutions of the five-component system Nd
2O
3–Al
2O
3–B
2O
3–K
2CO
3–MoO
3 where Nd
2O
3 and B
2O
3 were contained in excess of the stoichiometric composition. The grown crystal with hexagonal rod shape were up to 6x1x1 mm in size, bluish purple in color and transparent.
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Hiroshi Nakamura, Hideo Sakka, Makoto Takagi, Keihei Ueno
1981 Volume 10 Issue 9 Pages
1305-1306
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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Two chromogenic crown ethers,
N-(2-hydroxy-5-nitrobenzyl)-aza-15-crown-5(
1) and
N-(2-hydroxy-5-nitrobenzyl)-aza-18-crown-6(
2), were synthesized for the extraction photometry of alkali metal ions. The extraction selectivity followed the order:
1, Li
+>Na
+>K
+>>Rb
+, Cs
+ and
2, K
+>Na
+>Rb
+>Li
+>Cs
+.
1 is useful for determining 10–100 ppm Li
+ as well as for concentrating Li
+ from a dilute solution.
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Tamotsu Fujisawa, Toshio Sato, Masatoshi Kawashima, Masakuni Nakagawa
1981 Volume 10 Issue 9 Pages
1307-1310
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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Regioselective reaction of Grignard reagents in the presence of a copper(I) catalyst or of organocuprates with the terminal vinyl carbon of β-isopropenyl-β-propiolactone through the S
N2′ pathway affords 4-methyl-3-alkenoic acids in which the (
E)-isomers predominate in good yields. Synthetic utility of this reaction is demonstrated in one-step synthesis of homoterpenoic carboxylic acids.
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Hideshi Hattori, Hisaya Imai, Hidenobu Itoh
1981 Volume 10 Issue 9 Pages
1311-1314
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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The nature of adsorbed CO on MgO was investigated by temperature programmed desorption technique. Magnesium oxide outgassed at 500°C gave one desorption peak at 190°C while MgO outgassed at 1000°C gave two distinctive desorption peaks at 185°C and 300°C. Carbon-13 labeled study indicates that two types of the adsorbed species on MgO outgassed at 1000°C do not exchange each other.
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Kazuhiro Matsuo, Kazuo Urabe, Yusuke Izumi
1981 Volume 10 Issue 9 Pages
1315-1316
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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Heteropoly acid efficiently catalyzed the addition reactions of water and carboxylic acid to phenylacetylene to form acetophenone at 60°C in the liquid phase. The higher catalytic activity of heteropoly acid compared with H
2SO
4 and HClO
4 is due to the cooperative action of heteropoly anion.
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Shoichi Kusumoto, Susumu Imaoka, Yoshikazu Kambayashi, Kumiko Yoshizaw ...
1981 Volume 10 Issue 9 Pages
1317-1320
Published: September 05, 1981
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The title compound was synthesized and identified with a partial hydrolysis product from natural streptothricin. This work confirmed the presence of the proposed glycosyl guanidine structure in the antibiotic and established a method for its preparation.
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Hamao Watanabe, Tadashi Ohkawa, Tsutomu Muraoka, Yoichiro Nagai
1981 Volume 10 Issue 9 Pages
1321-1322
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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Silicon functional di-
t-butylsilanes such as (
t-Bu)
2SiCl
2, (
t-Bu)
2Si(OMe)
2 and (
t-Bu)
2SiH(OMe) were conveniently obtained in good yields via di-
t-butylsilane, (
t-Bu)
2SiH
2, which can readily be prepared from the reaction of dichlorosilane, H
2SiCl
2, with
t-butyllithium.
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Hironori Arakawa, Yoshihiro Sugi
1981 Volume 10 Issue 9 Pages
1323-1326
Published: September 05, 1981
Released on J-STAGE: March 27, 2006
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RhCl(PPh
3)
3 (Wilkinson complex) catalyzes the dehydrogenation of 2-propanol under the photo-irradiation at room temperature. The catalytic activity of the reaction mixture including 2-propanol and this complex is very high, especially in the case of the preparation of this mixture under the oxygen atmosphere, and has the maximum value at the special concentration range of this complex.
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