-
Masahiko Iyoda, Yukihiro Yoshikawa, Masazumi Nakagawa
1982 Volume 11 Issue 10 Pages
1501-1504
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Trisdehydro[16]annuleno[18]annulene has been synthesized. A strong paratropicity was observed in the [16]annulene moiety. The observed diatropicity of the 18π moiety indicates that the
1H NMR behavior of the annulenoannulene can be regarded as a superposition of the nature of individual rings and the peripheral 4nπ-system.
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Masaaki Miyashita, Ryuji Yamaguchi, Akira Yoshikoshi
1982 Volume 11 Issue 10 Pages
1505-1508
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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As a convenient synthetic method of γ-keto acids, oxoalkylation of carboxylic acids with nitroolefins was examined. Carboxylic acid dianions reacted with conjugated nitroolefins at low temperature (−100°C) and a variety of γ-keto acids were obtained on acidic workup in moderate to good yields.
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Hiroatsu Matsuura, Noboru Kubota, Hiromu Murata
1982 Volume 11 Issue 10 Pages
1509-1512
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Vibration-rotation infrared spectrum of ν
6 of acetonitrile was measured with a resolution of 0.08 cm
−1. The spectrum was heavily perturbed by a Fermi resonance with ν
7+ν
8 and a Coriolis resonance with ν
3. The analysis gave values, more precise than before, of the parameters for these states along with the interaction parameters.
View full abstract
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Shunichi Fukuzumi, Toshio Tanaka
1982 Volume 11 Issue 10 Pages
1513-1516
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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A 1:1 charge-transfer (CT) complex between 1-benzyl-1,4-dihydronicotinamide (BzlNH) and chloranil was isolated from a benzene solution of these reactants (hν
CT =1.70 eV, λ
max = 730 nm). The transient CT band was observed also in the hydride transfer from BzlNH to chloranil in MeCN. The decay of the CT band coincided with the formation of the product, tetrachlorohydroquinone anion.
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Midori Ishitsuka, Takenori Kusumi, Jiro Tanaka, Hiroshi Kakisawa
1982 Volume 11 Issue 10 Pages
1517-1518
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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From
Pachydictyon coriaceum, new diterpenoids, acetyldictyolal (
7), acetals (
5a) and (
5b), and acetyldictyol C(
9), were isolated.
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Akira Sekiya, Teruo Umemoto
1982 Volume 11 Issue 10 Pages
1519-1520
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Trifluoromethylazosulfonylarenes were synthesized in high yields by treatment of trifluoronitrosomethane with arenesulfonamides in the presence of a base and their reactivity was examined. It was found that they acted as effective hydrogen-acceptors as well as trifluoromethylating agents.
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Tamotsu Fujisawa, Masashi Takeuchi, Toshio Sato
1982 Volume 11 Issue 10 Pages
1521-1524
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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β-Vinyl-β-propiolactone reacts regio- and stereoselectively with an enolate equivalent such as cuprate derivatives of
N,
N-dimethylhydrazones and their bromomagnesium derivatives in the presence of a copper(I) catalyst to afford 7-oxo-(
E)-3-alkenoic acids in high yields.
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Keisuke Suzuki, Teruaki Mukaiyama
1982 Volume 11 Issue 10 Pages
1525-1528
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Highly stereoselective cyclizations of hydroxy enol ethers are effected by
N-iodosuccinimide to result in the exclusive formation of 2′-deoxy-2′-iodo-α-
D-glucopyranosides. An analog of glycolipid is also successfully synthesized according to the present method.
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Akira Ohki, Tadashi Takeda, Makoto Takagi, Keihei Ueno
1982 Volume 11 Issue 10 Pages
1529-1532
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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A novel device for copper separation and concentration is presented in which light energy was used as driving potential. This was achieved by combining a photo-induced redox reaction to a redox potential-driven, carrier-mediated transport of copper ion through a polymer-supported liquid membrane.
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Shuji Kanemasa, Shigehiko Ikeda, Hiroshi Shimoharada, Shoji Kajicaeshi
1982 Volume 11 Issue 10 Pages
1533-1536
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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3-Phenylthia
IV zolo[4,3-
a]isoindole, generated in situ from 3-phenyl-5H-thiazolo[4,3-
a]isoindolium bromide and triethylamine, reacted with a variety of electron-deficient olefins yielding the regio- and stereoselective 1:1 adducts between the azomethine ylide 1,3-dipole of the isoindole and the olefins.
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Vidya Bhushan, Srinivasan Chandrasekaran
1982 Volume 11 Issue 10 Pages
1537-1538
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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The pinacolic coupling reaction has been effectively used to prepare the unsymmetrical pinacol
2 and this key intermediate underwent a smooth ring enlargement to the monoterpene karahanaenone
3, an odoriferous constituent of Japanese hop and Cypress oil.
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Masakazu Miyakado, Satoru Inoue, Yoo Tanabe, Keisuke Watanabe, Nobuo O ...
1982 Volume 11 Issue 10 Pages
1539-1542
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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The potent antifungal constituent against
Pyricularia oryzae Cav. obtained from
Podophyllum peltatum L. has been disclosed to be a mixture of three new 3-acyl-4-hydroxy-5,6-dihydropyrones (podiblastin A, B and C). The absolute configuration at C-6 of podoblastins was determined to be (R).
View full abstract
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Yoo Tanabe, Masakazu Miyakado, Nobuo Ohno, Hirosuke Yoshioka
1982 Volume 11 Issue 10 Pages
1543-1546
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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A new general method for preparation of 3-acyl-4-hydroxy-2-pyrones has been developed. The new method includes a Fries type rearrangement of enol-acyl group toward adjacent carbon atom, by which the new and potent fungicides, podoblastin A, B and C have been synthesized for the confirmation of the structures.
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Virgil I. Stenberg, V. R. Srinivas, Kozo Tanabe, Tuo Jin, Hideshi Hatt ...
1982 Volume 11 Issue 10 Pages
1547-1550
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Of four newly synthesized catalysts designed for coal liquefaction, MoO
3–SnO
2 was superior for use with diphenyl ether and diphenylmethane with either H
2 or CO + H
2O. This agrees with the results of using these catalysts with a sub-bituminous coal. Carbon monoxide and H
2O is superior to H
2 for ether cleavage, whereas H
2 is better for hydrocarbon cleavage.
View full abstract
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Takashi Toda, Eietsu Hasegawa, Toshio Mukai, Haruki Tsuruta, Toshimits ...
1982 Volume 11 Issue 10 Pages
1551-1554
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Irradiation of 2-aroyl-3-arylnorbornadiene derivatives (
1) afforded the corresponding quadricyclane derivatives (
2) in good chemical yields and with excellent efficiencies (Φ=0.3–0.6). The quadricyclanes were converted to the original norbornadienes by treatment with trifluoroacetic acid, silver perchlorate, and silica gel, or by heating.
View full abstract
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Teruaki Mukaiyama, Toru Sugaya, Shogo Marui, Takashi Nakatsuka
1982 Volume 11 Issue 10 Pages
1555-1558
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Stereoselective alkoxylation of acyclic precursor, (2
S,3
S)-2,3-
O-isopropylidene-4-chloro-4-phenylthiobutyric acid methyl ester (
3) in the presence of SnCl
2–AgClO
4, followed by Pd(OAc)
2 promoted cyclization gave α-
L-threofuranosides in good yields.
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Toshio Sato, Toshiyuki Itoh, Tamotsu Fujisawa
1982 Volume 11 Issue 10 Pages
1559-1560
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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β-Ketoesters were obtained in good yields by the reaction of the Reformatsky reagent with acyl chlorides catalyzed by a palladium complex under mild conditions.
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Mikio Shimizu
1982 Volume 11 Issue 10 Pages
1561-1564
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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The U shaped tRNA can fit to the cognate aminoacyl-tRNA-synthetase, by making a covalent adduct of its uracil at position 8 to the C-terminal half of the synthetase. Then the complex of three anitcodon bases with a discriminator base (C4N, complex of four nucleotides) comes over the Rossmann fold of the synthetase and many features concerning with the genetic code can be explained, including the membrane transport of the amino acids by the help of the uncharged cognate tRNAs.
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Yasumasa Sakakibara, Nobuichi Yadani, Ichiro Ibuki, Mutsuji Sakai, Nor ...
1982 Volume 11 Issue 10 Pages
1565-1566
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Nickel(0) species generated in situ from NiBr
2(PPh
3)
2–Zn–PPh
3catalyzed the formation of unsaturated nitriles from vinyl halides and potassium cyanide. The reaction proceeded under very mild conditions and was stereoselective.
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Yasuchika Yonezawa, Toyofumi Yamada, Chung-gi Shin
1982 Volume 11 Issue 10 Pages
1567-1568
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Various dehydrotripeptides, containing one or two α-dehydroamino acid residues, were readily synthesized by using
N-carboxy α-dehydroamino acid anhydride as synthon of dehydropeptide unit.
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Feeya David, Bárbara Jardim Nunes
1982 Volume 11 Issue 10 Pages
1569-1570
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Reactions of
m-chloroperbenzoic acid with the medium ring olefins possessing the neighboring hydroxymethyl or carboxyl functional group afforded a simple synthetic route to bicyclic ethers or lactones.
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Yohji Nakatsuji, Hirofumi Kobayashi, Mitsuo Okahara, Kenji Matsushima
1982 Volume 11 Issue 10 Pages
1571-1574
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Several macrocyclic multidentates having one amide group were newly prepared and their complexation property toward Na
+, K
+, Ca
2+, and Ba
2+ was examined by the extraction method. The affinity toward Ca
2+ was observed and the orientation of the amide group toward the cation was suggested to be important for the molecular design of ligands.
View full abstract
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Noboru Morita, Toyonobu Asao
1982 Volume 11 Issue 10 Pages
1575-1578
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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A new hexacarbonyl(tropone)diiron complex was isolated and characterized. Several carbonyliron complexes of heptafulvalene were also synthesized.
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Seiichi Yogi, Kozo Hokama, Otohiko Tsuge
1982 Volume 11 Issue 10 Pages
1579-1582
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Stable 1,2-diazocines, 3,8-diphenyl-1,2-diazacycloocta-2,4,6,8-tetraenes, were prepared via halogenation-dehydrohalogenation sequences starting from readily available 3,8-diphenyl-1,2-diazacycloocta-2,8-diene. Thermolysis and photolysis of the 1,2-diazocines are also described.
View full abstract
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Shunichi Fukuzumi, Katsuhiko Hironaka, Toshio Tanaka
1982 Volume 11 Issue 10 Pages
1583-1586
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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A model of NADH, 1-benzyl-1,4-dihydronicotinamide (BzlNH), reduces benzyl bromide and methyl iodide in the presence of pyridine in MeCN under irradiation of the visible light (λ > 360 nm), yielding toluene and methane as main products, respectively. Evidence is presented for occurrence of one-electron transfer from the excited state of BzlNH to benzyl bromide or methyl iodide in the primary process of the photoreduction.
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Takashi Yoshida, Shojiro Saito
1982 Volume 11 Issue 10 Pages
1587-1590
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Variuos α,β-unsaturated δ-lactones were synthesized via Michael addition of methyl (phenylsulfinyl)acetate to alkyl vinyl ketones in the presence of tributylphosphine. For example, racemic massoia lactone was obtained in 49% overall yield.
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Shunichi Fukuzumi, Yuji Kondo, Toshio Tanaka
1982 Volume 11 Issue 10 Pages
1591-1594
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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A model of NADH, 1-benzyl-1,4-dihydronicotinamide (BzlNH), readily reduces [Fe(N–N)
3]
3+ (N–N = 2,2′-bipyridine and 1,10-phenanthroline) to [Fe(N–N)
3]
2+. The stoichiometry of the electron transfer reaction in the absence of a suitable base is such that BzlNH appears to be one-electron donor. In the presence of pyridine or
p-cyanopyridine, however, BzlNH acts as an apparent two-electron donor, when the reduction of [Fe(N–N)
3]
3+ with BzlNH proceeds by a two-step process.
View full abstract
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Takayuki Suga, Toshifumi Hirata, Ym Sook Lee
1982 Volume 11 Issue 10 Pages
1595-1598
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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In the biotransformation of the enantiomers of
p-menth-1-en-8-ol (α-terpineol) and 8-acetoxy-
p-menth-1-ene (α-terpinyl acetate) with the cultured suspension cells of
Nicotiana tabacum, it was clarified that the cultured cells effected the hydroxylation at the 6-position of (4
R)-(+)-enantiomer in preference to the (4
S)-(−)-enantiomer, whereas the cells did the hydrolysis of the acetoxyl group and the hydroxylation of the ethylenic linkage of (4
S)-(−)-α-terpinyl acetate in preference to the (4
R)-(+)-enantiomer.
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Nobuyuki Tanaka, Yoshikiyo Kato, Shigeru Suzuki, Akifumi Yamada
1982 Volume 11 Issue 10 Pages
1599-1600
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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The tast polarography of [VO(acac)
2] in aqueous solutions has been studied. Two well-defined separate waves of equal heights were obtained at a drop time of 0.5 s and a complex concentration of 0.23 mmol dm
−3. The ill-defined polarograms of [VO(acac)
2] in aqueous solutions were interpreted by the adsorption of some vanadium species produced by electrolysis at the surface of electrode.
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Teruaki Mukaiyama, Toru Haga, Nobuharu Iwasawa
1982 Volume 11 Issue 10 Pages
1601-1604
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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A convenient method for the stereoselective synthesis of
cis-β-substituted-α,β-epoxyketone is established employing Sn(OTf)
2 mediated cross aldol reaction between α-bromoketone and aldehyde followed by successive treatment of the adduct with KF-dicyclohexyl-18-crown-6.
View full abstract
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Takao Matsuno, Masahiro Ookubo
1982 Volume 11 Issue 10 Pages
1605-1606
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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A new marine carotenoid, mytiloxanthinone (3,8′-dihydroxy-7,8-didehydro-β,κ-carotene-3′,6′-dione) has been isolated from sea squirt,
Halocynthia roretzi.
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Masanori Utaka, Yuji Fujita, Akira Takeda
1982 Volume 11 Issue 10 Pages
1607-1610
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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1-Phenylazo-l-hydroperoxycyclohexanes, easily prepared by the autoxidation of cyclohexanone phenyl hydrazones, have been found to undergo C(1)–C(2) bond cleavages when treated with acids, bases, or reducing reagents under mild conditions. Thus 6-oxoalkanoic acids and their derivatives have been obtained in good yields from 2-hydroxycyclohexanone derivatives. The 2-hydroxyl group seems to play an important role for the cleavage.
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Nobuo Nakamura
1982 Volume 11 Issue 10 Pages
1611-1614
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Oxidation of 2,3-dimethyl-9-(
N,
N-dimethylamino)triptycene with mCPBA followed by chromatography on alumina afforded two stable rotamers about a C–N single bond, whose assignment was consistently carried out on the basis of their
1H- and
13C-NMR, along with those of the model compound, 9-(
N,
N-dimethylamino)triptycene
N-oxide.
View full abstract
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Masataka Yofkoyama, Kazuko Hoshi, Tsuneo Imamoto
1982 Volume 11 Issue 10 Pages
1615-1616
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Aromatic aldehydes were easily converted into the corresponding deoxybenzoins by treatment with methyl thiocyanate in the presence of tributylphosphine, followed by addition of sodium hydride.
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Koji Suemura, Tomomi Irokawa, Motoo Tori, Shinya Ohta, Yoshihiko Moriy ...
1982 Volume 11 Issue 10 Pages
1617-1620
Published: October 05, 1982
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13β,18β-Epoxybaccharan-3β-yl acetate was treated with BF
3·Et
2O in acetic anhydride to yield a complex mixture, in which the presence of
D:
C-friedobacchar-9(11)-ene-3β,18β-diyl diacetate (
2) was shown; the product (
2) was converted into 18-oxo-
D:
C-friedobacchar-9(11)-en-3β-yl acetate, the structure of which was confirmed by X-ray diffraction analysis.
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Takuo Ogihara, Oyo Mitsunobu
1982 Volume 11 Issue 10 Pages
1621-1624
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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The reaction of 5-methoxycarbonylmethyl-2-thiouridine (
la) with dipotassium diazenedicarboxylate and with N
2H
4–H
2O
2 afforded l-(β-
D-ribofuranosyl)-5-methoxycarbonylmethyl-4-(
lH)-pyrimidinone (
3a) in good yields, suggesting that the reaction involves diimide. On treatment with H
2O
2,
la also gave
3a.
View full abstract
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Reiji Takeda, Reiko Mori, Yoshio Hirose
1982 Volume 11 Issue 10 Pages
1625-1628
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Three new sesquiterpenoids, striatene, striatol and β-monocyclonerolidol, were isolated from the liverwort
Ptychanthus striatus(Lehm. et Lindemb.) Nees. Their structures have been established by spectroscopic analysis and chemical transformation.
These compounds are interesting in terms of the evolution of the liverwort from algae.
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Taizo Utsunomiya, Yoshio Hoshino
1982 Volume 11 Issue 10 Pages
1629-1632
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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The distribution of manganese in manganese ferrite particles prepared by the air oxidation of coprecipitated hydroxide suspensions has been investigated from the dissolution curves by using the core-model. The mole fraction of manganese increases gradually from the center to the surface of the particles and also increases abruptly near the particle surface.
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Kanji Omura, Junji Furukawa
1982 Volume 11 Issue 10 Pages
1633-1636
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Irradiation of benzylamines (PhCH
2NR′R″) complexed with trialkylaluminums (R
3Al) in benzene gives alkylbenzenes (PhCH
3 and PhCH
2R) and amines (HNR′R″). 1,2-Diphenylethane is also obtained as a side-product.
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Teruaki Mukaiyama, Hiroki Hayashi, Tetsuo Miwa, Koichi Narasaka
1982 Volume 11 Issue 10 Pages
1637-1640
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Highly optically active 3-phenylalkanals were obtained by the reaction of alkyl halides and a chiral homoenolate equivalent derived from the cinnamyl ether
3 and potassium diisopropylamide, followed by acidic hydrolysis.
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Tamotsu Fujisawa, Yoshitsugu Kurita, Masatoshi Kawashima, Toshio Sato
1982 Volume 11 Issue 10 Pages
1641-1642
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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(
E)-3-Alken-1-ols were stereospecifically synthesized in good yields utilizing the regioselective nucleophilic ring-opening reaction of 2,3-dihydrofuran with several kinds of organocuprates under mild conditions.
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Koichi Mikami, Naoyuki Kishi, Takeshi Nakai
1982 Volume 11 Issue 10 Pages
1643-1646
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Facile preparations of a variety of vinylsilanes with different functional groups are described which rely upon the utility of the three sigmatropic processes of 2-(trimethylsilyl)allyl alcohol derivatives, i.e., the Claisen and [2,3]-Wittig rearrangement and the tandem [2,3]-Wittig-oxy-Cope rearrangement.
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Masao Kaneko, Naoki Takabayashi, Akira Yamada
1982 Volume 11 Issue 10 Pages
1647-1650
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Simultaneous evolution of hydrogen and oxygen gases was achieved by visible light irradiation of water containig prussian blue and tris(2,2′-bipyridyl)ruthenium(II) complex. The gases evolved were analyzed by gas chromatography and mass spectroscopy. The mechanism for the water photolysis was also discussed.
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Katsuhiko Sakura, Tetsuo Sakamoto, Taku Matsuo
1982 Volume 11 Issue 10 Pages
1651-1654
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Polypyridineruthenium(II) complex with linked viologen units was synthesized as the model of man-made photoreaction center. Luminescence quenching of the ruthenium complex by a surfactant-type viologen in micellar or bilayer membrane systems was resolved into inter- and intramolecular processes and it became apparent that the photoinduced charge separation in intramolecular process was more efficient than that in intermolecular process.
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Kazuyuki Kakegawa, Jun-ichi Mohri, Hiroyuki Ishiguro, Koichiro Takahas ...
1982 Volume 11 Issue 10 Pages
1655-1658
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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A solid solution of (Ba,Pb)TiO
3 without compositional fluctuation has not been obtained by an ordinary solid-solid reaction of BaCO
3, PbO and TiO
2. This was confirmed through the measurements of Δd/d using X-ray diffraction. A new method of preparing (Ba,Pb)TiO
3 without compositional fluctuation was developed.
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Katsuaki Okabayashi, Osamu Ikeda, Hideo Tamura
1982 Volume 11 Issue 10 Pages
1659-1662
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Heat treatment effect of Co(II)-tetraphenylporphyrin (Co-TPP) on the catalytic activity for cathodic reduction of oxygen was studied. The improved catalytic activity of Co-TPP heat-treated at temperatures between 500 and 700°C was found to be due to a remarkable increase in the conductivity and the variation of the electronic states of the central metal ion, resulting from an extension of π-electron system by polymerization.
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Hideyuki Matsumoto, Yoshikazu Hoshino, Yoichiro Nagai
1982 Volume 11 Issue 10 Pages
1663-1666
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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The hydrosilylation of ethynylmethyldichlorosilane with dimethylchlorosilane catalyzed by tetrakis(triphenylphosphine)platinum(0) was found to show quite an unusual regioselectivity to afford the geminal product, 1-(methyldichlorosilyl)-1-(dimethylchlorosilyl)ethene, almost exclusively.
View full abstract
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Yutaka Morikawa, Tadatoshi Goto, Yoshihiko Moro-Oka, Tsuneo Ikawa
1982 Volume 11 Issue 10 Pages
1667-1670
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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The catalytic activities of metal ion exchanged form of fluor tetra silisic mica (Me-TSM) were tested for the conversion of methanol. Although Na- and H-TSM have no activities, some Me-TSM’s show characteristic activities. Ti-TSM exclusively catalyzes the dehydration reaction like an acid catalyst. Cu-TSM dehydrogenates methanol to produce methyl formate selectively.
View full abstract
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Sukeya Kodama, Masaaki Yabuta, Yutaka Kubokawa
1982 Volume 11 Issue 10 Pages
1671-1674
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Photocatalytic isomerization of butenes over ZnO and TiO
2 has been investigated. With ZnO, 1-butene is more reactive than 2-butene, photoenhancement in the isomerization being attributable to photoformed O
− hole centers. With TiO
2, 2-butene is more reactive than 1-butene, which would result from a stronger interaction of the C=C bond of 2-butene with UV irradiated TiO
2.
View full abstract
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Takehiko Nishio, Katsuhiro Katahira, Yoshimori Omote
1982 Volume 11 Issue 10 Pages
1675-1678
Published: October 05, 1982
Released on J-STAGE: March 27, 2006
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Irradiation of 1-methyl-4,6-diphenylpyrimidin-2(1
H)-one (
1a) in acyclic or cyclic ethers afforded the C–C bonded 1:1-adducts (
2a–
c) of
1a and ether via intermolecular hydrogen abstraction of the excited imino nitrogen of
1a, while irradiation of 1-phenyl-4-(3-ethoxypropyl)-6-methylpyrimidin-2 (1
H)-one (
1g) gave 1-phenyl-4,6-dimethylpyrimidin-2(1
H)-one (
1d) via intramolecular hydrogen abstraction of the excited imino nitrogen of
1g, in addition to 2-oxo-l,3-diazabicyclo[2.2.0]hex-5-ene derivative (
3g).
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