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21 results on '"Yamane, Keiko"'

2. Superparamagnetic iron oxide‐enhanced magnetic resonance imaging is useful in predicting malignant potential of vascular transformation of hypointense hypovascular nodules on gadoxetic acid‐enhanced magnetic resonance imaging

Author

Tanaka, Yoshiaki, Nakazawa, Takahide, Inoue, Tomoyoshi, Yamane, Keiko, Kubota, Kousuke, Uojima, Haruki, Takada, Juichi, Okuwaki, Yusuke, Hidaka, Hisashi, Shibuya, Akitaka, Kokubu, Shigehiro, Matsunaga, Keiji, and Koizumi, Wasaburo

Published
2017
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5. Late Relapse after a Sustained Virologic Response at 24 Weeks after Treatment with Daclatasvir and Asunaprevir Combination Therapy for Chronic Hepatitis C Virus Genotype 1b Infection with Liver Cirrhosis

Author

Uojima, Haruki, primary, Murakami, Shuko, additional, Nakatani, Seigo, additional, Hidaka, Hisashi, additional, Takeuchi, Atsuko, additional, Tanaka, Yoshiaki, additional, Inoue, Tomoyoshi, additional, Yamane, Keiko, additional, Kubota, Kousuke, additional, Nakazawa, Takahide, additional, Shibuya, Akitaka, additional, Tanaka, Yasuhito, additional, and Koizumi, Wasaburo, additional

Published
2018
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7. Prospective, randomized, controlled study of the efficacy of transcatheter arterial chemoembolization with miriplatin for hepatocellular carcinoma

Author

Kubota, Kousuke, primary, Hidaka, Hisashi, additional, Nakazawa, Takahide, additional, Okuwaki, Yusuke, additional, Yamane, Keiko, additional, Inoue, Tomoyoshi, additional, Uojima, Haruki, additional, Takada, Juichi, additional, Tanaka, Yoshiaki, additional, Shibuya, Akitaka, additional, Fujii, Kaoru, additional, Woodhams, Reiko, additional, Matsunaga, Keiji, additional, Kokubu, Shigehiro, additional, and Koizumi, Wasaburo, additional

Published
2017
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8. Three-dimensional computed tomography of portopulmonary venous anastomoses in patients with esophageal varices before treatment

Author

Matsumoto, Yasuhiro, primary, Hidaka, Hisashi, additional, Matsunaga, Keiji, additional, Kubota, Kousuke, additional, Yamane, Keiko, additional, Inoue, Tomoyoshi, additional, Minamino, Tsutomu, additional, Takada, Juichi, additional, Tanaka, Yoshiaki, additional, Okuwaki, Yusuke, additional, Nakazawa, Takahide, additional, Shibuya, Akitaka, additional, and Koizumi, Wasaburo, additional

Published
2015
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10. A case of anaplastic carcinoma of the pancreas diagnosed by endoscopic ultrasonography-guided fine-needle aspiration

Author

Ishida, Nana, primary, Yano, Takafumi, additional, Mishima, Takahito, additional, Yamane, Keiko, additional, Hasegawa, Rikiya, additional, Nakanome, Teppei, additional, Ishiguro, Yasuhiro, additional, Murata, Azuma, additional, Araki, Masao, additional, Kazama, Akio, additional, Okuwaki, Kosuke, additional, Miyazawa, Shiro, additional, Iwai, Tomohisa, additional, Kida, Mitsuhiro, additional, and Saegusa, Makoto, additional

Published
2014
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11. Case of concurrent gastric and lower bile-duct cancer

Author

Miyashita, Haruna, primary, Yano, Takafumi, additional, Hasegawa, Rikiya, additional, Yamane, Keiko, additional, Mishima, Takahito, additional, Nakanome, Teppei, additional, Ishiguro, Yasuhiro, additional, Murata, Azuma, additional, Araki, Masao, additional, and Kazama, Akio, additional

Published
2014
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19. Stereoselective Crossed Aldol Reaction via Boron Enolates Generated from α-Iodo Ketones and 9-Borabicyclo[3.3.1]nonane

Author

Mukaiyama, Teruaki, Takuwa, Tomofumi, Yamane, Keiko, and Imachi, Shouhei

Abstract

Boron enolates were in situ-generated reductively by treating various α-iodo ketones such as 2-iodo-1-phenylpropan-1-one, 2-iodo-1-(4-methoxyphenyl)propan-1-one, 2-iodopentan-3-one, 2-iodo-2-methyl-1-phenylpropan-1-one, 3,4-dihydro-2-iodo-1(2H)-naphthalenone, 2-iodo-1-phenylethan-1-one and 1-iodo-4-phenylbutan-2-one with 9-borabicyclo[3.3.1]nonane (9-BBN). Aldols were produced in good yields with good to high diastereoselectivities by subsequent reaction of boron enolates thus formed with various aldehydes. Several boron enolates derived from α-iodo ketones and pinacolatoborane were successfully isolated by distillation, though the yields were rather moderate.

Published
2003
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20. Convenient Methods for the Preparation of Unsymmetrical Double Aldols

Author

Mukaiyama, Teruaki, Pudhom, Khanitha, Yamane, Keiko, and Arai, Hidehiro

Abstract

Double aldol reaction proceeded stereoselectively at one α-carbon of ketones to give α-(1-hydroxyalkyl)-β-hydroxyalkyl ketones (double aldols) in good to high yields by the following three methods: i) tin(II) trifluoromethanesulfonate-mediated aldol reaction of aldehydes with β-hydroxy ketones (mono-aldols) in the presence of tertiary amines, ii) samarium(II) iodide-mediated aldol reaction of aldehydes with alkyl or aryl oxiranyl ketones, iii) Sn(OTf)2-promoted aldol reaction of α-bromo ketones with aldehydes giving α-bromo-β-stannyloxy ketones which were then converted to titanium enolates on treatment with low-valent titanium. Double aldols were formed by subsequent reaction of the above titanium enolates with aldehydes in one-pot procedure. Further, small and medium-sized carbocyclic compounds whose ring skeletons were composed of double aldol structure were synthesized by SmI2-mediated intramolecular cyclization between oxiranyl ketone and aldehyde functions.

Published
2003
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21. A New and Convenient Method for the Preparation of Cyclooctanone Containing Bis-Aldol Skeleton by Samarium(II) Iodide-mediated Intramolecular Aldol Cyclization of ?-Oxiranyl Keto Octanal

Author

Pudhom, Khanitha, Arai, Hidehiro, Yamane, Keiko, and Mukaiyama, Teruaki

Abstract

A polyoxy eight-membered ring compound containing a bis-aldol skeleton, 2,6-dibenzyloxy-3-(t-butyldimethylsiloxy)-7-hydroxy-8-hydroxymethyl-5-(p-methoxybenzyloxy)-4,4-dimethylcyclooctanone 1, a key synthetic intermediate of 19-hydroxypaclitaxel, was prepared in high yield from 2,6-dibenzyloxy-5-(t-buthyldimethylsiloxy)-3-(p-methoxybenzyloxy)-4,4-dimethyl-8,9-oxiranyl-7-oxononanal 6by the samarium(II) iodide-mediated intramolecular aldol cyclization.

Published
2002
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