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Ihara M Katsumata A Setsu F Tokunaga Y Fukumoto K 《The Journal of organic chemistry》1996,61(2):677-684
[Ni(cyclam)](ClO(4))(2)-catalyzed indirect electroreduction of olefinic bromides produced six-membered compounds in low to high yields. The synthetic intermediate 49 of Ipecac and Corynanthe alkaloids was obtained in 88% yield in a highly stereoselective manner. Lactam 66, the synthetic precursor of tacamonine, was prepared in 49% yield as a mixture of two diastereoisomers. The electrolysis of the bromoacetates gave the debrominated compounds in good yields. 相似文献
2.
Tetsuji Kametani Kazuo Kigasawa Mineharu Hüragi Nagatoshi Wagatsuma Setsu Saitoh Hideo Sugi 《Journal of heterocyclic chemistry》1973,10(3):313-315
Acid treatment of the alkylated products of (Va, Vb, and VIII) of piperidinols IVa and IVb, and tetrahydropyridine VII with β-bromoethylbenzene, afforded 1,2,3,4,5,6-hexahydro-8-hydroxy-2,6-methano-6,1 1-dimethyl-3-phenethyl-3-benzazocine (la) in good yield. Piperidinols Va and Vb were also obtained from the reaction of N-(3-methyl-3-pentenyl)-β-phenethylamine (IIb) with methyl 3-(4-methoxyphenyl)-2,3-epoxypropionate. 相似文献
3.
Atsuko Ito Keiko Iwai Chiyuki Oyama Setsu Morimoto Hiroaki Kato 《Hyperfine Interactions》1992,71(1-4):1371-1374
Magnetization and Mössbauer measurements have been made on a diluted antiferromagnets FexMg1?xTiO3 with x=0.2, 0.3 and 0.7. It has been demonstrated that this system exhibits a spin glass or a reentrant spin glass like behavior in the samples with x around the percolation concenrration xc≈0.25. It has been shown that various sizes of magnetic clusters are formed well above the transition temperatures determined by the magnetization measurements in the samples with x near xc. The behavior of Fe0.2Mg0.8TiO3 is discussed as a typical cluster glass. 相似文献
4.
Yasuhiko Syono Atsuko Ito Setsu Morimoto 《Journal of Physics and Chemistry of Solids》1981,42(6):483-486
The Mössbauer spectra of ilmenite (FeTiO3), Fe2+-doped ilmenites, MTiO3 (M = Cd, Mn, Zn, Co, Mg and Ni) and MGeO3 (M = Mn, Zn and Mg), have been studied from 4.2 K to room temperature. Systematic variations in the isomer shift and quadrupole splitting at room temperature are correlated with the change in ionic radii of the host M ions and the c/a ratio of the host crystal, respectively. The quadrupole splittings show a remarkable temperature variation; the magnetic ilmenites show either a sudden increase or a sudden decrease of quadrupole splittings below the Néel temperature, depending on the orientation of the spin axis with respect to the c axis. 相似文献
5.
Tetsuji Kametani Kazuo Kigasawa Tetsutaro Hayasaka Mineharu Hiiragi Haruhide Ishimaru Setsu Asagi 《Journal of heterocyclic chemistry》1966,3(2):129-136
The alkylation of tertiary amines, namely, 2-dimethylaminoethanol, triethylamine, pyridine and isoquinoline with various alkyl carboxylates was investigated. This reaction afforded the corresponding quarternary ammonium salts, e.g., methylation of 2-dimethyl-aminoethanol with methyl salicylate. 相似文献
6.
Tetsuji Kametani Kazuo Kigasawa Mineharu Hiiragi Fumio Satoh Setsu Saito Hideo Sugi Tsuneo Uryu 《Journal of heterocyclic chemistry》1972,9(5):1057-1059
The configuration of the quaternary ammonium salts (Va and Vb) from 3-benzyl-1,2,3,4,5,6-hexahydro-8-hydroxy-6,11-dimethyl-2,6-methano-3-benzazocine. (II) and 3-methyl-2-butenyl bromide was determined spectroscopically. Moreover, configurational studies on 3-benzyl (VIa and VIb) and 3-(3-methyl-2-butenyl)benzazocinium bromides (VIIa and VIIb) were also achieved. 相似文献
7.
The temperature variations of magnetizations and Mössbauer spectra of the diluted antiferromagnet Fe0.26Zn0.74F2 have been studied. It has been shown that the temperature variation of the Mössbauer spectra is nicely explained in an aspect of dynamical behavior of the antiferromagnetic (AF) clusters. By combining the results of the magnetization and Mössbauer measurements, it is inferred that the spin-glass like freezing of the AF clusters, but not individual spins, occurs atT
f=9.7 K. 相似文献
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