Zobrazeno 1 - 10 of 32 pro vyhledávání: '"Kunio Urushido"'
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ChemInform Abstract: Cycloaddition Reactions of 2-Acetylamino-, 2-Alkylamino-, 8-Ethylamino- , and 8-Acetylamino-1-azaazulenes with Dimethyl Acetylenedicarboxylate
Autor: Noritaka Abe, Kunio Urushido, Yoshimasa Hirai, Tosio Sakurai, Yoshimasa Fukazawa, Akikazu Kakehi
Publikováno v: ChemInform. 23
The reactions of 2- and 8-(substituted amino)-1-azaazulenes with dimethyl acetylenedicarboxylate (DMAD) were investigated. Treatment of ethyl 2-acetylamino-1-azaazulene-3-carboxylate with DMAD in refluxing acetonitrile gave 9-ethyl 1,2,3-trimethyl 3a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4d92890661f21ad7ea6c0f863da1aae1
https://doi.org/10.1002/chin.199244062
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Cycloaddition Reactions of 2-Acetylamino-, 2-Alkylamino-, 8-Ethylamino-, and 8-Acetylamino-1-azaazulenes with Dimethyl Acetylenedicarboxylate
Autor: Tosio Sakurai, Kunio Urushido, Yoshimasa Hirai, Yoshimasa Fukazawa, Noritaka Abe, Akikazu Kakehi
Publikováno v: Bulletin of the Chemical Society of Japan. 65:1784-1793
The reactions of 2- and 8-(substituted amino)-1-azaazulenes with dimethyl acetylenedicarboxylate (DMAD) were investigated. Treatment of ethyl 2-acetylamino-1-azaazulene-3-carboxylate with DMAD in refluxing acetonitrile gave 9-ethyl 1,2,3-trimethyl 3a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::136f23d05e9cc0e7d659455a53f99913
https://doi.org/10.1246/bcsj.65.1784
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Preparation of New Nitrogen-Bridged Heterocycles. 25. A Smooth Synthesis of [1,4]Thiazino[3,4,5-cd]indolizine Derivatives
Autor: Kunio Urushido, Suketaka Ito, Toshiaki Mabuchi, Tosio Sakurai, Tsuneo Fujii, Susumu Hatanaka, Akikazu Kakehi, Shun-ichiro Matsushita
Publikováno v: Bulletin of the Chemical Society of Japan. 63:3571-3578
The title compounds were prepared smoothly in moderate yields by the reactions of 3-(mercaptomethylene)-2(3H)-indolizinones with various alkylating agents such as bromoacetonitrile, bromoacetates, and phenacyl bromides in the presence of base. The st
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f86d93cf405dd3ed6b1ffd91b66f8460
https://doi.org/10.1246/bcsj.63.3571
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Asymmetric Cycloaddition ofN-Metalated Azomethine Ylides with the Optically Active α,β-Unsaturated Esters Derived from α-Amino Acids
Autor: Hidetoshi Yamamoto, Shuji Kanemasa, Eiji Wada, Tosio Sakurai, Kunio Urushido
Publikováno v: Bulletin of the Chemical Society of Japan. 63:2857-2865
α,β-Unsaturated esters bearing a chiral oxazolidine or perhydropyrrolo[1,2-c]imidazole auxiliary at the β-position have been prepared and applied to the cycloadditions with N-metalated azomethine ylides derived from α-(benzylideneamino) esters. T
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ca00adde981a3eddbf09c32e9e2c4f25
https://doi.org/10.1246/bcsj.63.2857
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Preparation of new nitrogen-bridged heterocycles. XXIV. Syntheses and reactions of pyrazolo(1,5-a)pyridine-2-thiols. (2)
Autor: Tsuneaki Takashima, Akikazu Kakehi, Hidetoshi Isawa, Tosio Sakurai, Suketaka Ito, Kunio Urushido
Publikováno v: Chemical and Pharmaceutical Bulletin. 38:2667-2675
Various 2-(acylmethylthio)-, 2-(benzylthio)-, and 2-(propargylthio)pyrazolo[1, 5-a]pyridine derivatives (4a-n' and 7a-n') were prepared in moderate to good yields by the reactions of potassium pyrazolo[1, 5-a]pyridine-2-thiolates (2 and 6), readily a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::53f2f48cf3f8fbc234624847611c2453
https://doi.org/10.1248/cpb.38.2667
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