The application discloses a synthesis method and application of
bergamottin, and comprises the following steps: (1) taking m-
benzene triol as
raw material, and synthesizing 5-methoxy-1,3-
benzene diol through a selective etherification reaction; (2) adopting a Pechmann
condensation reaction to prepare 5-methoxy-7-hydroxycoumarin; (3) obtaining 5-methoxy-7-allyloxy
coumarin through an etherification reaction; (4) preparing 5-methoxy-6-allyl-7-hydroxycoumarin through a
Claisen rearrangement reaction; (5) synthesizing 5-methoxypsoralen through an oxidation ring formation reaction; and (6) synthesizing the
natural compound bergamottin through a
demethylation reaction. The synthesis process is simple, raw materials are cheap, product separation and purification are simple, the yield is higher than 65%, the purity is above 99%, and the product can be produced on a large scale; meanwhile, the
bergamottin shows superior
antioxidant activity, and the
antioxidant performance is superior to corresponding
coumarin and
benzofuran, and has potential application value.