METHOD FOR PREPARING PRASUGREL

摘要

A method for preparing prasugrel is disclosed, wherein o-fluorobenzyl cyclopropyl ketone is converted toa-cyclopropylcarbonyl-2-fluorobenzyl halide (compound 2) using dibromohydantoin as halogenation agent and acetic acid as dissolvent, and then applying concerted catalysis method with phase transfer catalysts and inorganic salts to produce 2-oxo-4,5,6,7- tetrahydrothiopheno[3,2-c]pyridine tosylate (compound 4) in high yield, which is then subjected to condensation and acylation to obtain prasugrel as a gum. A purified method of prasugrel is also disclosed, wherein crystallization is performed using alcohols as crystallization solvents to obtain prasugrel with high purity.