abstract |
Title of the Invention PROCESS FOR PRODUCING 6,6'-DIHYDROXY-3,3,3',3'-TETRAMETHYL-1,1'-SPIROBIINDANE Abstract of the Disclosure A novel process for producing 6,6'-dihydroxy-3,3,3',3'-tetramethyl-1,1'-spirobiindane of the formula (1) (1) which comprises heat-treating 2,2-bis(4-hydroxyphenyl)-propane in the presence of a superacid-type resin or a perfluoroalkanesulfonic acid. |