Catalytic Activities of Layered Metal Chloride Oxides for the Dehydrohalogenation of <i>t</i>-Butyl Halides

Ueda, Wataru; Yamazaki, Masato; Morikawa, Yutaka

doi:10.1246/bcsj.66.347

Cited by 16 publications

(16 citation statements)

References 12 publications

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“…Unlike the precapillary complexation method, the in-capillary complexation method gave reproducible peak areas for the three polyoxomolybdate anions. As already described [20,29] 4 -increased with an increase of the CH 3 CN concentration (Fig. 3B).…”

Section: Optimization Of the Ce Conditionssupporting

confidence: 84%

Simultaneous determination of phosphonate, phosphate, and diphosphate by capillary electrophoresis using in‐capillary complexation with Mo(VI)

Himeno

Inazuma

Kitano

2007

J of Separation Science

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This study describes the simultaneous determination of phosphonate, phosphate, and diphosphate by CE with direct UV detection, based on in-capillary complexation with Mo(VI). When a mixture of phosphonate, phosphate, and diphosphate was injected into a capillary containing 3.0 mM Mo(VI), 0.05 M malonate buffer (pH 3.0) and 45% v/v CH3CN, three well-defined peaks, due to the migration of the corresponding polyoxomolybdate anions, were separated. The respective calibration graphs were linear in the concentration range of 2 x 10(-6)-2 x 10(-4) M for phosphonate, 1 x 10(-6)-5 x 10(-5) M for phosphate, and 1 x 10(-6)-2 x 10(-4) M for diphosphate; the correlation coefficients were better than 0.9990. The present CE method is successfully applied to the simultaneous determination of phosphonate, phosphate, and diphosphate in tap water.

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Section: Optimization Of the Ce Conditionssupporting

confidence: 84%

Simultaneous determination of phosphonate, phosphate, and diphosphate by capillary electrophoresis using in‐capillary complexation with Mo(VI)

Himeno

Inazuma

Kitano

2007

J of Separation Science

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“…2. The orientation of two directions crossing at right angles can be attributed to the crystallographic symmetry of the KC1 (001) surface, as reported previously for the epitaxial growth of metal phthalocyanines (Ashida, Uyeda & Suito, 1966) and long-chain molecules (Ueda, 1987) on KC1. Fig.…”

Section: Methodssupporting

confidence: 77%

Epitaxial growth and molecular orientation of tetraphenylporphyrin thin film vacuum-evaporated on KCl

Ashida¹,

Yanagi²,

Hayashi³

et al. 1991

Acta Crystallogr Sect B

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5,10,15,20-Tetraphenylporphyrin (H2TPP; C44H30N4, Mr = 614.75) films were vacuum-evaporated onto a KCI (001) surface. High-resolution electron microscopy and electron diffraction patterns indicated that the H2TPP crystal in the film is monoclinic with dimensions a = 1.20, b = 1.90, c---1.47 nm, /3 = 91"" and Z = 4. The rectangular crystallites grow epitaxially along four directions, the (101) plane of the crystal making parallel contact with the substrate surface and the b axis making an angle of --18.5 ° with the KC1 [100] or [010] directions. A highresolution electron micrograph of the film showed fine structure in a thin crystal. Lattice fringes are aligned parallel with a spacing of 0.95 nm, and short parallel bands with a spacing of 0.38nm are arranged obliquely in the lattice fringe. The optical diffraction pattern of the fine structure showed a long-period structure with an interval of 1.91 nm for every five bands. It is suggested that the planar molecules of H2TPP orient themselves nearly perpendicular to the substrate surface.

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“…An exploratory photolysis of isolated 15 in the presence of phenol gave poor yields of glycosides, similarly to the results in the pyranosylidene series [3]. However, in-situ generation of 15 with NaH, followed by irradiation in the presence of phenol yielded 72% of the known anomeric 0-glycosides 16 [39] ( c L -D /~-D 8:92), besides 9 % of (Z)-5 and < 1 YO of the anomeric C-glycosides 17 ((lR)/(lS) 1 :l). Higher concentrations of NaH increased the yield of 0-glycosides (60% with 1.5 equiv.…”

mentioning

confidence: 69%

Glycosylidene Carbenes. Part 21. Synthesis of N‐tosylglycono‐1,4‐lactone hydrazones as precursors of glycofuranosylidene carbenes

Mangholz

Vasella

1995

Helvetica Chimica Acta

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The W -(glycofuranosylidene)toluene-4-sulfonohydrazides 5 and 10 (Scheme I ) were prepared in good yields by oxidation (1,3-dibromo-5,5-dimethylhydantoin/Et3N) of the W -glycosyltoluene-4-sulfonohydrazides 4 and 9, which were obtained from 2,3,5-tri-0-benzyl-o-ribose (3) and 2,3,5-tri-O-benzyI-o-arabinos.e (8), respectively, and toluene-4-sulfonohydrazide. The analogous naphthalene-2-sulfonohydrazides 7 and 12 were similarly prepared from 3 and 8 via 6 and 11. Photolysis in the presence of phenol of the sodium salt 15 (Scheme 2), best generated in situ, yielded the anomeric glycosides 16, some 5, and traces of the glycosides ( Introduction. -Glycopyranosylidene carbenes, known reactive intermediates [ 11, are best generated from diazirines, such as 1, under mild thermal and photochemical conditions [2]. They are also formed from the alkali salts of N'-glycosylidenesulfonohydrazides, such as 2 [3] [4], or (in low yields) from diazides under photochemical conditions [5]. N' -(Glycopyranosylidene)sulfonohydrazides are more readily prepared than the corresponding diazirines and are more stable. Their salts react similarly to diazirines in forming glycosides with phenols [&9] and cyclopropanes with electron-deficient alkenes [3] [9] [lo]. Thermolysis of N' -(glycopyranosylidene)sulfonohydrazides, however, also generates sulfinates, and this results in the formation of additional by-products [I 11 [12].

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Catalytic Activities of Layered Metal Chloride Oxides for the Dehydrohalogenation of t-Butyl Halides

Abstract: Various metal chloride oxides having layered structures have been tested as catalysts for the dehydrohalogenation of t-butyl chloride and t-butyl bromide to form olefins and were found active for the reaction, depending on the metal constituents and the structure.

Cited by 16 publications

References 12 publications

Simultaneous determination of phosphonate, phosphate, and diphosphate by capillary electrophoresis using in‐capillary complexation with Mo(VI)

Simultaneous determination of phosphonate, phosphate, and diphosphate by capillary electrophoresis using in‐capillary complexation with Mo(VI)

Epitaxial growth and molecular orientation of tetraphenylporphyrin thin film vacuum-evaporated on KCl

Glycosylidene Carbenes. Part 21. Synthesis of N‐tosylglycono‐1,4‐lactone hydrazones as precursors of glycofuranosylidene carbenes

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