This invention discloses a process for synthesizing
rosuvastatin acetone tert-butyl ester, comprising the following steps: First, compound I is dissolved in an
organic solvent, compound II is added, and the reaction is stirred at
room temperature. The reaction is monitored by HPLC. After the reaction is complete, the product is separated to obtain compound III. Second, a
palladium catalyst is added to the
organic solvent, stirred and mixed evenly, and then compound III and compound IV are added and stirred under the action of the
palladium catalyst to obtain compound V. The advantages of this invention are: mild
reaction conditions, the entire process is carried out at
room temperature, eliminating the need for harsh conditions such as high temperature and
high pressure, reducing
energy consumption and equipment requirements, and making it suitable for industrial-scale production; excellent
stereoselectivity, using a
palladium-catalyzed reselective
Heck reaction to replace the traditional Witting and Julia olefin reactions, avoiding stereoisomer byproducts, and resulting in higher purity of the target product; fewer byproducts and simpler separation.