申请人:——
公开号:US20040034213A1
公开(公告)日:2004-02-19
A method of converting pure &agr;-anomer or &bgr;/&agr;-anomer mixtures of 1,2,3,5-tetra-O-acetyl-L-ribofuranose to methyl-1-(2,3,5 -tri-O-acetyl-&bgr;-L-ribofuranosyl)-1,2,4-triazole-3-carboxylate an intermediate for levovirin, as well as, the novel pure &agr;-anomer, alpha 1,2,3,5-tetra-O-acetyl-L-ribofuiranose, are useful in manufacturing levovirin.
一种将纯的α-异构体或1,2,3,5-四-O-乙酰-L-核糖呋喃糖的β/α-异构体混合物转化为甲基-1-(2,3,5-三-O-乙酰-β-L-核糖呋喃糖基)-1,2,4-三唑-3-羧酸酯的方法,这是左环病毒素的中间体,以及新颖的纯α-异构体,α-1,2,3,5-四-O-乙酰-L-核糖呋喃糖,对于制造左环病毒素很有用。