The invention relates to a manufacturing method of
atorvastatin intermediate (R)-(-)-4-
nitrile-3-hydroxybutyrate (ATS-5), which solves the problems of high cost, expensive
raw material price and the like of the prior art. The manufacturing method is characterized in that the
atorvastatin intermediate is prepared from
epichlorohydrin as a
raw material through ring-opening addition,
glycolysis esterification, cyaniding substitution synthesis and refining. The invention has simple synthesis
route, abundant
raw material resources, low equipment requirements and no high-temperature high-pressure reaction; the content of produced ATS-5 is more than 98 percent, the content of water is lower than 0.2 percent, and the content of
enantiomer is less than 1.0 percent. The manufacturing method is a mature production process for manufacturing the intermediate of
medicine atorvastatin and is applicable to medium-sized and small enterprises.