摘要制备了具有构象柔性的标题化合物,并用硼氢化氘钠还原。氘代离子仅从异头甲氧基的相反侧进攻。然而,采用0H5构象的相应4,6-O-亚苄基-β-d-苏--2-庚吡喃糖苷衍生物的类似还原反应的立体选择性极低,这表明4,6-二乙酸酯的还原反应具有β-d-苏氨酸构型不是由稳定的0H5构象产生的,而是由不稳定的((5 H 0)构象)产生的。
Photoaddition reactions of 3-nitro-2-enopyranoside derivatives in 1,3-dioxolane
作者:Tohru Sakakibara、Aya Takaide、Akinori Seta
DOI:10.1016/0008-6215(92)84075-4
日期:1992.3
Abstract Irradiation of 3-nitro-2-enopyranosidederivatives having α- d -erythro, β- d -hreo, and α- d -threo configurations in 1,3-dioxolane afforded adducts in moderate yields. Structural assignment of the adducts, including conformational analyses of the 1,3-dioxolanyl moiety, were performed.