Sofosbuvir intermediate and preparation method thereof

The invention provides a sofosbuvir intermediate and a preparation method thereof. The intermediate adopts the structure shown in the specification. The intermediate is prepared from 4-(trifluoromethoxy)phenol and (S)-2-phenoxy-chloro-phosphoryl aminopropionic acid isopropyl ester through a reaction. In a sofosbuvir preparation process, the intermediate has the good splitting effect and is suitable for industrial production, and the overall reaction yield is high.