A stereoselective process for preparing a β-anomer enriched 2-deoxy-2,2-difluoro-D-ribofuranosyl-3,5-hydroxy protected-1-alkyl and aryl sulfonate intermediates by contacting an α-anomer enriched 2-deoxy-2,2-difluoro-D-ribofuranosyl-3,5-hydroxy protected-1-fluoroalkyl and fluoroaryl sulfonate with a conjugate anion of a sulfonic acid containing the desired alkyl or aryl sulfonate.
一种制备富含 β-异构体的 2-脱氧-2,2-二
氟-D-
呋喃核糖基-3,5-羟基保护-1-烷基和芳基
磺酸盐中间体的立体选择性工艺,其方法是将富含 α-异构体的 2-脱氧-2,2-二
氟-D-
呋喃核糖基-3,5-羟基保护-1-氟烷基和
氟芳基
磺酸盐与含有所需烷基或芳基
磺酸盐的
磺酸的共轭阴离子接触。