The application discloses a preparation method of
fluvastatin sodium impurity F, and specifically comprises the following steps: firstly,
fluvastatin alcohol ketone is dissolved in an acid
solvent to perform a
dehydration reaction, then a reduction reaction is performed under the condition of a reducing catalyst, and finally, a
hydrolysis reaction is performed with
sodium hydroxide to obtain
fluvastatin sodium impurity F. The application provides a preparation method of
fluvastatin sodium impurity F, which is low in cost, simple in operation, high in yield and easy in process purification. The method uses
fluvastatin sodium intermediate (fluvastatin
alcohol ketone) as a
raw material, the
raw material is easy to obtain, and the impurity F can be prepared through only three chemical reactions, and each step does not need a complicated refining process. The
fluvastatin sodium impurity F prepared by the application is high in yield and high in purity, and can be used as a standard or control product for
quality control and production monitoring of fluvastatin sodium.