The invention is a process for stereoselectively producing a dioxolane nucleoside analogue from an anomeric mixture of β and α anomers represented by formula (A) or formula (B), wherein R is selected from the group consisting of C1-6 alkyl and C6-15 aryl and Bz is benzoyl. The process comprises hydrolyzing said mixture with an enzyme selected from the group consisting of Protease N, Alcalase, Savinase, ChiroCLEC-BL, PS-30, and ChiroCLEC-PC to stereoselectively hydrolyze predominantly one anomer to form a product wherein R1 is replaced with H. The process also includes the step of separating the product from unhydrolyzed starting material. Additionally, the functional group at the C4 position is stereoselectively replaced with a purinyl or pyrimidinyl or derivative thereof.
该发明涉及一种从β和α异构体混合物中立体选择性地生产
二噁烷核苷类似物的方法,其由式(A)或式(B)表示,其中R选择自由基,包括C1-6烷基和C6-15芳基,Bz为苯甲酰基。该方法包括使用选自
蛋白酶N、Alcalase、Savinase、ChiroCL
EC-BL、PS-30和ChiroCL
EC-PC的酶
水解该混合物,以立体选择性地
水解优选的一种异构体,形成一个产物,其中R1被替换为H。该方法还包括从未
水解的起始物质中分离产物的步骤。此外,C4位置的功能基团被立体选择性地替换为
嘌呤或
嘧啶或其衍
生物。