| 摘要 |
<p>The present invention relates to an improved process for the preparation of a sulfinyl compound of formula (I), or a pharmaceutically acceptable salt, hydrate or solvate thereof, from a sulfide compound of formula (II), wherein in both formulae (I) and (II) R<SUB>1 </SUB>and R<SUB>3 </SUB>are selected from the group consisting of hydrogen, methyl or C<SUB>1-4</SUB>alkoxy, R<SUB>2 </SUB>is selected from the group consisting of substituted or unsubstituted C<SUB>1-4</SUB>alkoxy and R<SUB>4 </SUB>is selected from the group consisting of hydrogen or substituted or unsubstituted C<SUB>1-4</SUB>alkoxy.</p> |
