Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Yoshitake Naoi"'
Publikováno v:
NIPPON KAGAKU KAISHI. :119-126
Autor:
Takashi Ebata, Katsuya Matsumoto, Koshi Koseki, Hajime Matsushita, Yoshitake Naoi, Hiroshi Kawakami, Kazuo Itoh
Publikováno v:
ChemInform. 22
Coupling reactions between 1-chloro-2,3-dideoxyribose and silylated pyrimidines have been examined from the point of stereoselectivity. When the reaction was carried out in chloroform, the selectivity was in the anomeric ratio of α:β=4:6. On the ot
Publikováno v:
ChemInform. 22
Coupling reaction between 2-α-phenylthio-2,3-dideoxyribose and silylated pyrimidine bases in the presence of SnCl4 proceeded stereoselectively to give the β-anomers. These nucleosides were converted to 2′,3′-dideoxy-2′,3′-didehydronucleosid
Autor:
Kazuo Itoh, Katsuya Matsumoto, Yoshitake Naoi, Hajime Matsushita, Koshi Koseki, Hiroshi Kawakami, Takashi Ebata
Publikováno v:
ChemInform. 23
Stereoselectivities in coupling reactions between silylated pyrimidine bases and 3- or 2-α-phenylthio-2,3-dideoxyribose were examined. In the former case, no stereoselectivities were observed when the coupling reactions were performed either with 1-
Publikováno v:
ChemInform. 22
Publikováno v:
ChemInform. 28
Publikováno v:
Synthetic Communications. 21:481-487
The reactions of aryl Grignard reagents with p- and m-bromochlorobenzenes catalyzed by non-ligated NiCl2 give selectively chlorobiphenyl derivatives. By the stepwise reaction, an unsymmetrical terphenyl was synthesized in a good yield.
Publikováno v:
Chemistry Letters. 19:1459-1462
Coupling reaction between 2-α-phenylthio-2,3-dideoxyribose and silylated pyrimidine bases in the presence of SnCl4 proceeded stereoselectively to give the β-anomers. These nucleosides were converted to 2′,3′-dideoxy-2′,3′-didehydronucleosid
Autor:
Hajime Matsushita, Kazuo Itoh, Yoshitake Naoi, Nobuhiro Mizutani, Koshi Koseki, Takashi Ebata, Hiroshi Kawakami
Publikováno v:
ChemInform. 21
The coupling reaction between 1-α-chloro-2-deoxyribose derivative and silylated 5-trifluoromethyluracil was examined. The best stereoselectivity was obtained when the reaction was carried out using a large amount of silylated base in the presence of
Publikováno v:
ChemInform. 21