132336-22-2Relevant academic research and scientific papers
SYNTHESIS OF 2',3'-DIDEHYDRO-2',3'-DIDEOXYNUCLEOSIDES UTILIZING COUPLING REACTIONS BETWEEN NUCLEIC BASES AND PHENYLTHIOSUBSTITUTED 2,3-DIDEOXYRIBOSE
Kawakami, Hiroshi,Ebata, Takashi,Koseki, Koshi,Matsumoto, Katsuya,Matsushita, Hajime,et al.
, p. 2451 - 2470 (2007/10/02)
Stereoselectivities in coupling reactions between silylated pyrimidine bases and 3- or 2-α-phenylthio-2,3-dideoxyribose were examined.In the former case, no stereoselectivies were observed when the coupling reactions were performed either with 1-chlorosugar in an SN2 mode or in the presence of Lewis acids as catalyst in an SN1 mode.Coupling reaction with 2-α-phenylthio-2,3-dideoxyribose in the presence of Lewis acids, especially SnCl4, proceeded with good stereoselectivity to give anomeric mixtures of α : β = 1 : 9.All these nucleosides were converted to 2',3'-didehydro-2',3'-dideoxynucleosides by oxidation to sulfoxides followed by thermal elimination of sulfenic acid.
