The invention discloses a preparation method of a
carfilzomib intermediate, which comprises the following steps: adding ASC007-I into a reaction container, adding a
solvent at
room temperature, starting stirring, reducing the temperature to 5-10 DEG C, dropwise adding an
alkali metal hydroxide solution into a reaction
bottle, slowly heating to maintain the temperature at 20-25 DEG C after dropwise adding, reacting, adjusting the pH value to 3-4 with glacial
acetic acid after the reaction is completed, separating out a large amount of white
solid, and filtering to obtain the
carfilzomib intermediate. Washing the
filter cake with
purified water until the filtrate is neutral; and recrystallizing to obtain the product ASC007-II.
Alkali metal hydroxide and ASC007-I react, no catalyst or
hydrogen is needed, the reaction yield finally reaches 90% through improvement of a
feeding mode and adjustment of a reaction
solvent, and compared with a hydrogenation method, the method has the advantages that the requirement for equipment is low, the reaction condition is milder, the process
controllability is higher, and the method is more suitable for industrial production.