Spirofluorene xanthene phenol compound and preparation method thereof

The invention provides a spirofluorene xanthene phenol compound and a preparation method thereof. The method comprises the steps of adding 2,7-dihydroxy fluorenone, phenol and a catalyst to a container, wherein the molar ratio of the 2,7-dihydroxy fluorenone to the phenol is 1 to (4-8); the ratio of the catalyst to the 2,7-dihydroxy fluorenone is (0.1-1.0) to 1; heating to 120 DEG C to agitate and react for 2 hours; adding concentrated hydrochloric acid, wherein the mass ratio of the concentrated hydrochloric acid to the 2,7-dihydroxy fluorenone is (0.5-1.0) to 1; heating to 140 DEG C, keeping warm and reacting for 3 hours, cooling the product to room temperature, adding water to separate out sediment; washing with deionized water, leaching and drying in vacuum to obtain a crude product; recrystalizing the crude product by using ethanol water of which the volume ratio is 1 to 5 at 80 DEG C, and leaching and vacuum-drying the crystal to obtain the refined product. The novel heat-resistant epoxy resin, polycarbonate and the like synthetized from the compound disclosed by the invention as the material have the characteristics of good heat stability, high transparency, high refractive index, and solubility and the like, and can be widely applied to the preparation of various materials with excellent performances.