发明授权
US4701567A Process for producing 6,6'-dihydroxy-3,3,3',3'-tetramethyl-1,1'-spirobiindane 失效
制备6,6'-二羟基-3,3,3',3'-四甲基-1,1'-螺二茚满的方法

Process for producing
6,6'-dihydroxy-3,3,3',3'-tetramethyl-1,1'-spirobiindane
摘要:
A novel process for producing 6,6'-dihydroxy-3,3,3',3'-tetramethyl-1,1'-spirobiindane of the formula (1) ##STR1## which comprises heat-treating 2,2-bis(4-hydroxyphenyl)propane in the presence of a superacid-type resin or a perfluoroalkanesulfonic acid.
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