Isobutylene → 6-Chloro-1,1,3,3-tetramethylindan-5-ol

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Reaction Conditions

Reaction Steps

99 g (0.33 mol) of 2,2-bis-(4-hydroxy-3-chlorphenyl)-propane, 20 g of an acid-activated fuller's earth and 60 g (1.07 mol) of isobutylene are introduced into an autoclave. After stirring for 6 hours at 230° C., 200 ml of toluene are added, the catalyst is filtered off and the solvent evaporated. The residue (127.1 g) is distilled in vacuo in a packed column. 12.2 g (0.055 mol) of 5-hydroxy-6-chlor-1,1,3,3-tetramethyl indane (VII) melting at 51° C. are obtained from the fraction boiling at 75°-83° C./0.2 Torr by recrystallisation from 25 ml of petroleum ether. ##STR25##

Provenance & Evidence