Process and methods for the preparation of optically active cis-2-hydroxymethyl-4- (cytosin-1'-yl)-1,3-oxathiolane or pharmaceutically acceptable salts thereof

摘要

There is provided a method for resolving a compound of formula III, in the cis configuration: There is also provided a process for producing optically active compound of formula I or II: wherein: R1, R2, R3 are as defined herein, the method and process involving the production, recovery and conversion of diastereomeric salts.