Invention Grant
US08399655B2 Process and methods for the preparation of optically active cis-2-hydroxymethyl-4-(cytosin-1′-yl)-1,3-oxathiolane or pharmaceutically acceptable salts thereof 有权
用于制备光学活性顺式-2-羟甲基-4-(细胞蛋白酶-1'-基)-1,3-氧硫杂环戊烷的方法和方法或其药学上可接受的盐

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