Zobrazeno 1 - 10 of 165 pro vyhledávání: '"Sadao Nishigaki"'
1
Study on the structures of 2-substituted iminothiazolidine derivatives
Autor: Katsurada Masanori, Toshimasa Ishida, Masatoshi Sakae, Fumio Yoneda, Mayumi Watanabe, Sadao Nishigaki
Publikováno v: Journal of Heterocyclic Chemistry. 34:157-160
The reaction of 2-bromoethylamine 1 with methylisothiocyanate 2 under mild condition gave 2-methyl-amino-2-thiazoline 3 as the major product together with two kinds of byproducts, 3-(N-methylthiocar-bamoyl)-2-methyliminothiazolidine 4 and N,N′-dime
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::53c73f53b1af9f408cb5f03689bd3396
https://doi.org/10.1002/jhet.5570340125
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4
A novel synthesis of 8-arylaminotheophyllines
Autor: Masatsugu Higuchi, Hashime Kanazawa, Misuzu Ichiba, Fumio Yoneda, Keitaro Senga, Sadao Nishigaki
Publikováno v: Journal of Heterocyclic Chemistry. 15:641-644
A novel synthesis of 8-arylaminotheophyllines (8a-e) by the reaction of 5-arylazo-6-ethoxy-methyleneamino-1,3-dimethyluracils (2a-e) or 5-arylazo-1,3-dimethyl-6-dimethylaminomethylene-aminouracils (3a-e) with sodium dithionite in formic acid is descr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::722a5dd71bb8ecd1fcdb34333dad234d
https://doi.org/10.1002/jhet.5570150423
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5
New, convenient synthesis of 2-alkyl- and 2-vinylpyrazolo[3,4-d]-pyrimidine derivatives
Autor: Sadao Nishigaki, Hashime Kanazawa, Yukako Kanamori, Fumio Yoneda, Keitaro Senga
Publikováno v: Journal of Heterocyclic Chemistry. 15:359-363
Treatment of 1,3-dimethyl-6-hydrazinouracil with the appropriate dimethylformamide dialkylacetal afforded the, corresponding 2-alkyl-5,7-dimethylpyrazolo[3,4-d]pyrimidine-4,6-(5H,7H)diones. The reaction of 1,3-dimethyl-6-(α-methylbenzylidenehydrazin
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e63bbd4e6576280445c37a51cafda7b6
https://doi.org/10.1002/jhet.5570150302
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6
Synthesis and properties of 1,3-dimethyl-6-azalumazines (Isofervenulins)
Autor: Tomohisa Nagamatsu, Edward C. Taylor, Sadao Nishigaki, Fumio Yoneda, M. Kanahori, K. Ogiwara
Publikováno v: Chemical and Pharmaceutical Bulletin. 26:367-373
A new synthesis of 1, 3-dimethyl-6-azalumazines (isofervenulins) is described. The reaction of 6-amino-1, 3-dimethyl-5-nitrosouracil (I) with acid hydrazides in refluxing aprotic solvents such as dimethylformamide (DMF), dimethyl sulfoxide (DMSO) or
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0cd5c637840346f6b8f170397a78d370
https://doi.org/10.1248/cpb.26.367
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7
Construction of pyrimido[5,4-e]-as-triazine, purine,v-triazolo-[4,5-d]pyrimidine and pyrazolo[3,4-d]pyrimidine ring systems from 5-arylazo-6-arylidenehydrazino-1,3-dimethyluracils
Autor: Kiyoko Fukami, Misuzu Ichiba, Keitaro Senga, Sadao Nishigaki
Publikováno v: Journal of Heterocyclic Chemistry. 19:769-773
Reaction of 5-arylazo-6-arylidenehydrazino-1,3-dimethyluracils (II), prepared by the treatment of 6-aryl-idenehydrazino-1,3-dimethyluracils (I) with diazotized arylamines, with dimethylformamide dimethylacetal resulted in the formation of pyrimido[5,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9445c05f484585763f1968fce74498d9
https://doi.org/10.1002/jhet.5570190413
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9
The crystal structure of ftorafur
Autor: Sadao Nishigaki, Nobuyuki Shimizu, Yoshinobu Nakai, Keiji Yamamoto, Katsuhide Terada, Takeshi Uchida
Publikováno v: Chemical and Pharmaceutical Bulletin. 30:2629-2632
The crystal structure of ftorafur, C8H9FN2O3, has been determined by single-crystal X-ray diffraction techniques. The crystal is triclinic, space group P1 ; its unit-cell dimensions are a=8.994 (8), b=16.612 (9), c=5.981 (5) A, α=86.40 (6), β=94.06
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::922cba57da8f0ea84415207d05b52f4a
https://doi.org/10.1248/cpb.30.2629
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