A simplified and improved synthesis of [11C] phosgene with iron and iron (III) oxide
K Nishijima, Y Kuge, K Seki, K Ohkura, N Motoki… - Nuclear medicine and …, 2002 - Elsevier
[ 11 C]Phosgene ([ 11 C]COCl 2 ), a useful precursor for labeling several radiopharmaceuticals,
is generally produced by catalytic oxidation of [ 11 C]carbon tetrachloride over Fe …
is generally produced by catalytic oxidation of [ 11 C]carbon tetrachloride over Fe …
Synthesis and evaluation of radioiodinated cyclooxygenase-2 inhibitors as potential SPECT tracers for cyclooxygenase-2 expression
…, K Minematsu, K Seki, N Tamaki, K Ohkura… - Nuclear medicine and …, 2006 - Elsevier
Although several COX-2 inhibitors have recently been radiolabeled, their potential for
imaging COX-2 expression remains unclear. In particular, the sulfonamide moiety of COX-2 …
imaging COX-2 expression remains unclear. In particular, the sulfonamide moiety of COX-2 …
Separation and identification of taxifolin 3-O-glucoside isomers from Chamaecyparis obtusa (Cupressaceae)
…, K Ohno, M Coskun, K Seki, K Ohkura - Natural Product …, 2002 - Taylor & Francis
Taxifolin 3- O -glucoside isomers, [(2R, 3R)-, (2R, 3S)-, (2S, 3R)- and (2S, 3S)-] were isolated
from leaves of Chamaecyparis obtuse (Cupressaceae). Their structures were elucidated on …
from leaves of Chamaecyparis obtuse (Cupressaceae). Their structures were elucidated on …
Improvement of an efficient separation method for chemicals in diesel exhaust particles: analysis for nitrophenols
…, S Taneda, Y Mori, AK Suzuki, K Ohkura… - … Science and Pollution …, 2008 - Springer
Goal, scope, and background Diesel exhaust is believed to consist of thousands of organic
constituents and is a major cause of urban pollution. We recently reported that a systematic …
constituents and is a major cause of urban pollution. We recently reported that a systematic …
Guaiacylglycerol‐7′‐O‐methyl 8′‐vanillic acid ether and related compounds from Boreava orientalis
…, AM Ozkan, K Seki, K Ohkura - … Journal of Plant …, 2003 - Wiley Online Library
The threo and erythro forms of guaiacylglycerol‐7′‐O‐methyl 8′‐vanillic acid ethers,
threo and erythro guaiacylglycerol 8′‐vanillin ethers, and threo guaiacylglycerol 8′‐(4‐…
threo and erythro guaiacylglycerol 8′‐vanillin ethers, and threo guaiacylglycerol 8′‐(4‐…
Increased [18F] 2-fluoro-2-deoxy-D-glucose ([18F] FDG) yield with recycled target [18O] water: factors affecting the [18F] FDG yield
…, Y Kuge, E Tsukamoto, K Seki, K Ohkura… - Applied radiation and …, 2002 - Elsevier
The reuse of [ 18 O] water after being purified by distillation has been reported to give lower
[ 18 F]2-fluoro-2-deoxy-d-glucose ([ 18 F]FDG) yields, probably due to the presence of …
[ 18 F]2-fluoro-2-deoxy-d-glucose ([ 18 F]FDG) yields, probably due to the presence of …
Photo-arylation. IV. Synthesis of 2-arylpyridines by photo-reaction of 2-iodopyridine with substituted benzenes
…, K SEKI, C YOSHIDA, K OHKURA… - Chemical and …, 1985 - jstage.jst.go.jp
Photolysis of a mixture of 2—iodopyridi ‘ne and a variety of substituted benzenes in dichloro—methane
afforded the corresponding 2-ary1pyridines as isomeric mixtures. Based on the …
afforded the corresponding 2-ary1pyridines as isomeric mixtures. Based on the …
Synthesis of 1-β-D-(5-Deoxy-5-iodoarabinofuranosyl)-2-nitroimidazole (β-IAZA): A Novel Marker of Tissue Hypoxia
The present work describes the synthesis of the b-isomer of 1-aD-(5-deoxy-5-iodoarabinofuranosyl)-2-nitroimidazole
(IAZA). Radioiodinated IAZA (123I-IAZA) has been extensively …
(IAZA). Radioiodinated IAZA (123I-IAZA) has been extensively …
The pyridyl cation as a reactive intermediate in the photoreaction of iodopyridines with benzenes
K Ohkura, K Seki, M Terashima, Y Kanaoka - Tetrahedron letters, 1989 - Elsevier
The electrophilic behavior of the reactive entity in the phtosubstitution of benzenes with 2-
iodopyridine was found to be ascribable to the intermediary 2-pyridyl cation, rather than to …
iodopyridine was found to be ascribable to the intermediary 2-pyridyl cation, rather than to …
Synthesis of a radioiodinated thymidine phosphorylase inhibitor and its preliminary evaluation as a potential SPECT tracer for angiogenic enzyme expression
…, S Zhao, Y Kuge, N Tamaki, K Ohkura - Journal of Labelled …, 2008 - Wiley Online Library
The expression of thymidine phosphorylase (TP) is strongly associated with angiogenesis
in tumors and activation of antitumor agents. We designed a novel 5‐ 125 I‐labeled 6‐(2‐…
in tumors and activation of antitumor agents. We designed a novel 5‐ 125 I‐labeled 6‐(2‐…