著者

山下 純一 松本 宏 小林 和弘 野口 和春 安本 三治 上田 亨

出版者

公益社団法人日本薬学会

雑誌

Chemical & pharmaceutical bulletin (ISSN:00092363)

巻号頁・発行日

vol.37, no.9, pp.2287-2292, 1989-09-25

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A practical synthesis of 3'-O-benzyl-2'-deoxy-5-trifluoromethyluridine (1), a candidate antitumor agent for clinical testing, was developed from 2'-deoxy-5-iodouridine (3). Benzylation of 2'-deoxy-5-iodo-5'-O-trityluridine (14) with benzyl bromide and sodium hydride in tetrahydrofuran gave the 3'-O-derivative (16). Benzoylation of 16 afforded the N^3-benzoyl derivative (17). Coupling of 17 with trifluoromethylcopper, prepared from bromotrifluoromethane and copper powder in the presence of 4-dimethylaminopyridine, gave the 5-trifluoromethyl derivative (19) minimally contaminated with the 5-pentafluoroethyl compound. Deprotection of 19 furnished 1.

著者

貝沼 世樹 鈴木 敦史 嶋村 延幸 河津 直樹 岡田 千丈 岡 巧 小磯 憲介 正垣 敦 矢ヶ崎 陽一 五ノ井 秀 市川 達也 上田 亨 水野 雅俊 杉岡 達也 森川 隆史 稲田 喜昭 若林 準人

出版者

一般社団法人映像情報メディア学会

雑誌

映像情報メディア学会技術報告 = ITE technical report (ISSN:13426893)

巻号頁・発行日

vol.39, no.16, pp.1-4, 2015-03

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1/1.7型2000万画素積層型CMOSイメージセンサを開発した.本センサは,複数のAD変換器,圧縮回路,高速I/Fを搭載することで低ノイズ,高速読み出し,動画・静止画の同時キャプチャ機能を実現した.マルチサンプリング機能を用いた1.3e-rmsのランダムノイズ特性,16Mpixel 120fpsを2.3Gpbs/lane,8Laneでの出力,2Link構成での4Mpixelと16Mpixelの同時出力を達成している.積層構造による信号処理の搭載だけでなく,新規アーキテクチャによる高速・高画質・高機能化への活用として提案する.

著者

A A B A A A A B 上田 亨 辰野 高司

出版者

公益社団法人 日本薬学会

雑誌

ファルマシア (ISSN:00148601)

巻号頁・発行日

vol.4, no.11, pp.867-873, 1968-11-15 (Released:2018-08-26)

著者

福川 清史 上田 亨 平野 孝夫

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.31, no.5, pp.1582-1592, 1983-05-25 (Released:2008-03-31)

参考文献数

41

被引用文献数

18 26

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Neplanocin A (1) and N6-benzoylneplanocin A (2) were converted to the corresponding 3', 6'-O-(tetraisopropyldisiloxane-1, 3-diyl)-neplanocin A's (3, 4). The 2'-hydroxy group in 3 and 4 was triflated (5, 6). Nucleophilic displacement of 5 and 6 with a number of nucleophiles (I-, Br-, Cl-, N3-, AcO-, AcS-) in hexamethylphosphoric triamide afforded the corresponding 2' (R)-substituted derivatives in high yields. The 2' (S)-azido derivatives were obtained in a similar manner from arabinoneplanocin A prepared by this method. Adenosine was also converted to 2' (R)-substituted derivatives, including arabinofuranosyladenine, as well as 2' (S)-substituted adenosines. The physical properties of these 2'-substituted derivatives of neplanocin A and adenosine, including nuclear magnetic resonance and circular dichroism spectra, are presented.

著者

井上 英夫 上田 亨

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.26, no.9, pp.2664-2667, 1978-09-25 (Released:2008-03-31)

被引用文献数

3 7

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Treatment of 5'-acetylthio-5'-deoxy-2', 3'-O-isopropylidene-5-bromouridine, prepared from 2', 3'-O-isopropylidene-5-bromouridine, with sodium methoxide in methanol afforded 5'-deoxy-5'-thio-2', 3'-O-isopropylidene-S6, 5'-cyclouridine. Deacetonation of the product gave 5'-deoxy-5'-thio-S6, 5'-cyclouridine, a sulfur-bridged cyclouridine fixed in the"anti"conformation. Starting from the 5'-amino derivative a N6, 5'-cyclouridine was similarly prepared. The nuclear magnetic resonance and mass spectra of a series of O-, N- and S-cyclouridines were compared and the characteristic features were discussed.

著者

今沢 正興 上田 亨 浮田 忠之進

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.23, no.3, pp.604-610, 1975-03-25 (Released:2008-03-31)

被引用文献数

19 30

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New thiosugar nucleosides, 2'-deoxy-2'-mercaptouridine (III), its disulfide (IV), 2'-deoxy-2'-mercapto-3', 5'-di-O-acetyluridine (V), and 2'-deoxy-2'-methyl-thiouridine (VI) have been synthesized. The present synthetic method involves the use of 2'-deoxy-2'-acetylthio-3', 5'-di-O-acetyluridine (II) as the intermediate which was obtained by the reaction of 2, 2'-cyclo-3', 5'-di-O-acetyluridine (I) with thioacetic acid. The proton magnetic resonance (PMR) data of these compounds suggested that the introduction of sulfuratom at 2'-position resulted in the furanose ring puckering that is extremely biased to C2' endo-mode. 2'-Deoxy-2', 6-epithio-5, 6-dihydro-arabinofuranosyluracil (VIIIb), the 2'-epimer of III in an 2', 6-epithio form, was also synthesized.

著者

池原 森男 上田 亨

出版者

The Society of Synthetic Organic Chemistry, Japan

雑誌

有機合成化学協会誌 (ISSN:00379980)

巻号頁・発行日

vol.32, no.6, pp.402-418, 1974-06-01 (Released:2010-01-21)

参考文献数

123

被引用文献数

5 7

著者

福川 清史 周東 智 平野 孝夫 上田 亨

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.34, no.9, pp.3653-3657, 1986-09-25 (Released:2008-03-31)

参考文献数

9

被引用文献数

4 11

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Photolysis of 1-β-D-ribofuranosyl-5-aminoimidazole-4-carboxamide (AICA-riboside) gave 2-amino-N-(β-D-ribofuranosyl)malondiamide, which was cyclized by treatment with ethyl orthoformate to furnish 1-β-D-ribofuranosyl-5-hydroxyimidazole-4-carboxamide (bredinin), a potent immunosuppressive nucleoside antibiotic.

著者

山根 晃 井上 英夫 上田 亨

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.28, no.1, pp.157-162, 1980-01-25 (Released:2008-03-31)

参考文献数

12

被引用文献数

10 19

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Treatment of 4-thiouridine with phenacyl bromide, bromoacetone, and ethyl bromoacetate gave the corresponding 4-thioalkylcarbonyl derivatives. The sulfur extrusion reactions of these compounds afforded ribosides of 4-phenacylidene-2 (3H)-pyrimidinone, 4-acetonylidene-2 (3H)-pyrimidinone, and 2-pyrimidinone-4-acetic ester, respectively. The ease of sulfur extrusion depends on the electron-withdrawing ability of the carbonyl group attached to the 4-S-methylene group. Sulfur extrusion reactions starting from 6-thioinosine similarly gave the ribofuranosides of 6-phenacylpurine and 6-acetonylpurine. These purine ribosides exist meinly as the enol form rather than the keto form.

著者

山根 晃 松田 彰 上田 亨

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.28, no.1, pp.150-156, 1980-01-25 (Released:2008-03-31)

参考文献数

13

被引用文献数

13 26

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Treatment of 6-methylsulfonyl-9-(2, 3, 5-tri-O-benzoyl-β-D-ribofuranosyl) purine with ethyl acetoacetate and sodium hydride in tetrahydrofuran afforded, after deblocking, 6-ethoxycarbonylmethyl-9-β-D-ribofuranosylpurine. Similarly, replacement of the 6-methylsulfonyl moiety with other carbanions derived from diethyl malonate, ethyl cyanoacetate, malononitrile, nitromethane, and sodium cyanide gave the corresponding 6-C-substituted purine nucleosides. Most of these derivatives exist as the 6-(1H)-exomethylene tautomeric forms. 6-Ethoxycarbonylmethylpurine riboside was further converted to 6-methyl, ethyl, propyl, butyl, and pentyl-purine ribosides by decarboxylation or prior alkylation of the methylene group followed by de-carboxylation. This reaction sequence facilitated the preparation of hitherto almost inaccessible alkyl or C-substituted purine nucleosides.

著者

松田 彰 野本 裕二 上田 亨

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.27, no.1, pp.183-192, 1979-01-25 (Released:2008-03-31)

被引用文献数

16 31

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A facile displacement of a methylsulfonyl group in adenosines with cyanide ion is described. Treatment of protected 8-methylsulfonyladenosines with sodium cyanide in dimethylformamide gave the 8-cyanoadenosines. The conversion of the cyano group to the methyl imidate, methoxycarbonyl, carbamoyl, and carboxylic acid, respectively, was achieved. Similar reaction was carried out with 2-methylsulfonyladenosines to give the 2-cyanoadenosines and their derivatives. The nuclear magnetic resonance (NMR) and circular dichroism (CD) spectra of these 2-and 8-substituted adenosines are given. The 8-substituted adenosines possess syn-conformations while the 2-substituted derivatives prefer to possess anti-conformations, as confirmed by the CD and NMR spectra.

著者

松田 彰 佐藤 和恵 宮坂 貞 上田 亨

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.32, no.5, pp.2048-2051, 1984-05-25 (Released:2008-03-31)

参考文献数

8

被引用文献数

4 4

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2-Aminomethylinosine (1), a one-carbon extended homolog of an exocyclic amino group of guanosine, was synthesized from guanosine by the use of a newly developed protection and deprotection method. Introduction of a methoxy group into the 6-position of 2-benzenesulfonyl-purine riboside facilitated a nucleophilic substitution with cyanide to afford 2-cyano-6-methoxypurine riboside (11) which was subsequently hydrogenated and demethylated with trimethylsilyl iodide to afford 1.

著者

佐野 友春 井上 英夫 上田 亨

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.33, no.9, pp.3595-3598, 1985-09-25 (Released:2008-03-31)

参考文献数

15

被引用文献数

6 10

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2'-Deoxy-6, 2'-methano-cyclouridine, a carbon-bridged cyclonucleoside fixed in a high-anti conformation, was synthesized. Treatment of a 3', 5'-O-protected 6-cyano-2'-O-imidazolythiocarbonyluridine with tri-n-butyltin hydride afforded a 6, 2'-oxomethano-cyclouridine derivative in low yield. Base treatment of 5-bromo-2'-deoxy-2' (S)-ethoxycarbonylmethyl-3', 5'-O-(tetraisopropyldisiloxane-1, 3-diyl) uridine resulted in an intramolecular Michael reaction followed by dehydrobromination to give the 6, 2'-cyclonucleoside. The latter was de-ethoxycarbonylated by treatment with sodium chloride and water in dimethylsulfoxide followed by desilylation to furnish the title compound.

著者

佐野 友春 周東 智 井上 英夫 上田 亨

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.33, no.9, pp.3617-3622, 1985-09-25 (Released:2008-03-31)

参考文献数

7

被引用文献数

25 41

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The reaction of methylenetriphenylphosphorane with 2'-keto-3', 5'-O-(tetraisopropyldisiloxane-1, 3-diyl) uridine afforded the 2'-methyleneuridine (1). Oxidation of 1 with osmium tetroxide and tert-butyl hydroperoxide or N-methylmorpholine-N-oxide afforded a mixture of a 2'-hydroxymethyluridine (2) and its arabinosyl isomer. Oxidation at lower temperature gave the former as the main product. Compound 2 was converted to the 5-bromo-2'-iodomethyl derivative (3) through the 2'-mesyloxy compound, and 3 was treated with tri-n-butyltin hydride to give the 6, 2'-methano-cyclo-5, 6-dihydro derivative (4). Compound 4 was dehydrobrominated and deprotected to furnish 6, 2'-methano-cyclouridine, a uridine fixed in high-anti conformation. Some results on the synthesis and cleavage of the 2'-spiro-epoxy derivative prepared from the 2'-ketouridine are also presented.

著者

碓井 博幸 上田 亨

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.34, no.4, pp.1518-1523, 1986-04-25 (Released:2008-03-31)

参考文献数

10

被引用文献数

12 16

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Treatment of 3', 5'-O-(tetraisopropyldisiloxane-1, 3-diyl)-2'-ketoadenosine (1) with methylenetriphenylphosphorane gave the 2'-methylene derivative (2). Hydroxylation of 1 with OsO4 gave the 2'-hydroxymethyladenosine (4), which was then converted to the 2'-phenylthiomethyl derivative (5). Photocyclization followed by deprotection of the product furnished 8, 2'-methanoadenosine (7), and adenosine fixed in a high-anti conformation. Oxidation of a 2'-hydroxyethylideneadenosine with OsO4 gave the 2'-dihydroxyethyladenosine (10), which was also converted to the 2'-(2-phenylthioethyl) derivative (11). The photocyclization of 11 and successive elimination of the hydroxyl group gave the 8, 2'-ethenoadenosine (13). Catalytic hydrogenation and deprotection of 13 afforded 8, 2'-ethanoadenosine (15). The circular dichroism spectral features of C-cycloadenosine are discussed.

著者

碓井 博幸 松田 彰 上田 亨

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.34, no.5, pp.1961-1967, 1986-05-25 (Released:2008-03-31)

参考文献数

12

被引用文献数

5 7

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Guanosine fixed in the high-anti conformation by means of an 8, 2'-methylene bridge was prepared. N2-Acetyl-O6-ethylguanosine (2) was converted to the 3', 5'-O-(tetraisopropyldisiloxane-1, 3-diyl) derivative (3). Oxidation of 3 to the 2'-keto derivative (4) and successive coupling with methylenetriphenylphosphorane gave the 2'-methylidene derivative (5) and its α-anomer. The 2'-methylidene function of 5 was hydroxylated, and the 2'-hydroxymethyl group was modified to give the phenylthiomethyl derivative (6). Photocyclization of 6 followed by deprotection of the sugar and base protecting groups furnished 8, 2'-methanoguanosine (12). The alpha anomer of 12 was likewise prepared. The circular dichroism spectra of 12, its α-anomer, and related compounds were measured.

著者

佐野 友春 上田 亨

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.34, no.1, pp.423-425, 1986-01-25 (Released:2008-03-31)

参考文献数

13

被引用文献数

10 11

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The synthesis of 6, 3'-methanouridine was achieved by condensation of 2, 4-dimethoxy-6-lithiomethylpyrimidine with 5-O___--(tert-butyldi-methyl)silyl-1, 2-O___--isopropylidene-3-ketoxylose, followed by intramolecular glycosylation and deprotection. 6, 3'-Methanocytidine was also prepared from the 4-O___--methyl intermediate. The title compounds are the first example of uridine and cytidine fixed between C-6 and the 3'-position of pyrimidine nucleosides by a methylene group.

著者

松田 彰 渡辺 一之 宮坂 貞 上田 亨

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.37, no.2, pp.298-303, 1989-02-25 (Released:2008-03-31)

参考文献数

16

被引用文献数

3 5

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The synthesis of a new carbon-bridged cyclopurine nucleoside, 2'-deoxy-8, 2'-methanoguanosine (25), which is fixed in a high-anti torsional angle region, was accomplished. 2-Acetamido-6-ethoxy-8-methanesulfonyl-9-(3, 5-di-O-acetyl-2-O-tosyl-1-β-D-ribofuranosyl)purine (18) was cyclized with carbanions of malonic esters, followed by sequential deblocking and decarboxylation to afford 25. The ultraviolet spectra of 25 in neutral solution revealed two separated bands corresponding to their B1u and B2u transitions, which was rather similar to the case of its O6-ethyl derivative (22), but quite different from the previously reported 8, 2'-methanoguanosine (26), a ribosyl counterpart of 25. The circular dichroism spectra of these cyclonucleosides are also discussed.

著者

山下 純一 松本 宏 小林 和弘 野口 和春 安本 三治 上田 亨

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.37, no.9, pp.2287-2292, 1989-09-25 (Released:2008-03-31)

参考文献数

30

被引用文献数

7 15

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A practical synthesis of 3'-O-benzyl-2'-deoxy-5-trifluoromethyluridine (1), a candidate antitumor agent for clinical testing, was developed from 2'-deoxy-5-iodouridine (3). Benzylation of 2'-deoxy-5-iodo-5'-O-trityluridine (14) with benzyl bromide and sodium hydride in tetrahydrofuran gave the 3'-O-derivative (16). Benzoylation of 16 afforded the N3-benzoyl derivative (17). Coupling of 17 with trifluoromethylcopper, prepared from bromotrifluoromethane and copper powder in the presence of 4-dimethylaminopyridine, gave the 5-trifluoromethyl derivative (19) minimally contaminated with the 5-pentafluoroethyl compound. Deprotection of 19 furnished 1.

著者

河野 彬 原 泰寛 菅田 節朗 松島 美一 上田 亨

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.32, no.5, pp.1919-1921, 1984-05-25 (Released:2008-03-31)

参考文献数

15

被引用文献数

12 16

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A thymidine phosphorylase preparation was partially purified from human liver tumor tissues (poorly differentiated adenocarcinoma). The substrate specificity of the enzyme was investigated with eleven pyrimidine nucleosides. Thymidine and 2'-deoxyuridine were good substrates, while uridine, 3'-deoxyuridine, 5'-deoxyuridine, and 2', 3'-dideoxy-3'-hydroxy-methyluridine were not. Uridines substituted at the 5-position by a cyano, bromo, or chloro group were also phosphorolyzed by the enzyme, but the activity for 5-fluorouridine was much lower. 5'-Deoxy-5-fluorouridine was also cleaved. Either a 5-substituent or a 2'-deoxy structure seems to be essential for a good substrate.