The invention relates to a method for synthesizing progesterone (2,2,4,6,6,17α,21,21,21-D9) by electrochemically promoted
hydrogen-
deuterium exchange. The method comprises the following steps: adding progesterone and an
electrolyte (such as
tetra-n-butylammonium
tetrafluoroborate) into a reaction container, uniformly mixing with a reaction
solvent, then adding deuterated
methanol-D4 into the reaction container under protective
atmosphere and stirring conditions, using a carbon material as an
electrode, and reacting at a
constant current for 5-20 hours; after the reaction is completed, vacuum-
drying the reaction
solvent, separating and purifying the progesterone (2,2,4,6,6,17α,21,21,21-D9) by
silica gel column chromatography, and vacuum-
drying an eluent to obtain a pure progesterone (2,2,4,6,6,17α,21,21,21-D9). The synthesis method of the present invention is mild, efficient, and simple to operate, and can achieve rapid and efficient synthesis of progesterone (2,2,4,6,6,17α,21,21,21-D9).