Sulfuric Acid → 1,1,3,3-Tetramethylindan-5-ol

Participants

Reaction Steps

114 g (0.5 mol) of 2,2-bis-(4-hydroxyphenyl)-propane, 6 ml of concentrated sulphuric acid and 90 g (1.6 mol) of isobutylene are stirred in an autoclave for 6 hours at 180° C. After cooling, the reaction product is taken up in 150 ml of toluene and washed with 10 % by weight aqueous sodium hydrogen carbonate solution to remove the catalyst. The toluene solution is then distilled to remove the solvent and the residue of 176.9 g is subsequently subjected to fractional distillation, giving 20.6 g (22 % of the theoretical) of 5-hydroxy-1,1,3,3-tetramethyl indane.

Provenance & Evidence