The application discloses a preparation method of a
benzopyran derivative containing a
thioester structure, and comprises the following steps: adding a
propargyl ether compound, hexafluoroisopropanol and N-iodosuccinimide into a
solvent to react at 50-70 DEG C for 0.5-5 h, then adding a
sulfonyl chloride compound, a
palladium catalyst, a ligand, a carbonyl
molybdenum and a base to react at 80-100 DEG C for 20-28 hours, and after the reaction is completed, post-treatment is carried out to obtain the
benzopyran derivative containing the
thioester structure; the preparation method uses the
sulfonyl chloride compound as a reactant and a
sulfur source, uses the carbonyl
molybdenum as a carbonyl source, has mild
reaction conditions, simple operation, a wide functional group tolerance range of a substrate and high reaction efficiency. According to actual needs, various
benzopyran derivatives containing the
thioester structure can be synthesized, and the method is convenient to operate and wide in practicability.