The invention belongs to the technical field of fine
organic synthesis, and particularly relates to a synthesis method of hydroxyl
pinacolone retinoate. The method comprises the following steps: (1) adding an
organic solvent into
retinoic acid, adding an
amide catalyst, uniformly stirring, and carrying out ice bath; (2) adding
phosphorus trichloride into the material obtained in the step (1) under the protection of
nitrogen, and reacting; (3) standing to separate out a lower-layer inorganic solution, adding 1-hydroxy-3, 3-dimethyl
butane-2-
ketone under an ice bath condition, then adding an acid-binding agent, carrying out heat preservation reaction, carrying out reduced-pressure suction
filtration on inorganic salt, and carrying out reduced-pressure concentration on a
liquid phase; and (4) adding a recrystallization
solvent, cooling and crystallizing to obtain the hydroxypinacolone retinoate. The raw materials and reagents adopted by the invention are common chemical reagents, are low in cost and are easy to obtain; the
solvent used in the reaction is
toluene, and the next reaction can be carried out without separation and purification; the two-step reaction can be completed in the same kettle, less equipment is used, and the equipment
utilization rate is high.