In accordance with the present invention there is provided a nucleoside analogue of formula (I) or (Ia) which is useful as an antiviral agent.
根据本发明提供了一种式(I)或(Ia)的核苷类似物,可作为抗病毒药物。
Method for the treatment of Flaviviridea viral infection using nucleoside analogues
申请人:BioChem Pharma Inc.
公开号:US06566365B1
公开(公告)日:2003-05-20
In accordance with the present invention there is provided a method for treating or preventing a Flaviviridea viral infection in a host comprising administering a therapeutically effective amount of at least one compound of formula (I) or (II)
or a pharmaceutically acceptable salts thereof, wherein Ra, R, Z and Y are defined in the application.
Process for producing dioxolane nucleoside analogues
申请人:Bydlinski Gregory
公开号:US20050085638A1
公开(公告)日:2005-04-21
The present invention relates to a process conducted in a single reaction vessel for producing a dioxolane nucleoside analogue of formula I or a pharmaceutically acceptable salt thereof; the process comprising the steps of adding a Lewis acid, a silylating agent and a non-silylated purine or pyrimidine base or an analogue thereof to a dioxolane of formula II. The invention also provides a process for producing a dioxolane compound of formula III; by reacting a dioxolane compound of formula IV in a suitable solvent in the presence of DIB and I
2
, using a suitable source of energy.
The invention is a process for stereoselectively producing a dioxolane nucleoside analogue from an anomeric mixture of &bgr; and &agr; anomers represented by the following formula A or formula B:
1
wherein R is selected from the group consisting of C
1-6
alkyl and C
6
-
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 R
1
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.
Method for the treatment or prevention of Flaviviridea viral infection using nucleoside analogues
申请人:BioChem Pharma Inc.
公开号:US20030225037A1
公开(公告)日:2003-12-04
In accordance with the present invention there is provided a method for treating or preventing a
Flaviviridea
viral infection in a host comprising administering a therapeutically effective amount of at least one compound of formula (I) or (II)
1
or
or a pharmaceutically acceptable salts thereof, wherein Ra, R, Z and Y are defined in the application.