The invention discloses a
continuous flow preparation method of
lenalidomide and derivatives thereof, and belongs to the technical field of medical
chemistry. According to the preparation method,
acetonitrile is adopted as a
solvent, a substrate solution A and a brominating agent solution B are prepared respectively, the substrate solution A and the brominating agent solution B are mixed online to obtain a first
mixed solution, the first
mixed solution is introduced into a
continuous flow photochemical reactor for a photo-bromination reaction, and the
continuous flow photochemical reactor is provided with an LED
light source with an integrated circulating cooling function; the method comprises the following steps: mixing 3-aminopiperidine-2, 6-dione
hydrochloride with alkali to obtain a bluish violet pre-activated solution, mixing the pre-activated solution with light bromination reaction
effluent on line, and carrying out condensation and cyclization reaction in a flowing state; and continuously carrying out hydrogenation reduction reaction in a flowing state, and collecting
effluent to obtain the target compound
lenalidomide or the derivative thereof. According to the continuous flow preparation method disclosed by the invention, the total
retention time of the three-step reaction is shortened to 42 minutes from more than 40 hours of the traditional process, and the production capacity in unit time is remarkably improved.