Water → 7-Chloro-3,3-dimethyl-2,3-dihydro-1H-inden-5-ol

Participants

Reaction Steps

449 g of isoprene, stabilized with 1.35 g of phenothiazine, were added dropwise over the course of 5.5 hours to a solution of 771 g of m-chlorophenol, 77 g of 85% strength phosphoric acid and 6 ml of water in 1.44 liters of o-dichlorobenzene at 150° C. To complete the reaction, stirring was continued overnight at 150° C. After cooling, the acid phase was separated off and extracted by shaking with toluene. The combined organic phases were washed until neutral. Fractional distillation gives 194 g of 7-chloro-3,3-dimethyl-5-hydroxy-indane; boiling point 105°-110° C/0.5 mm Hg; melting point 86.5° - 87.5° C. ##STR38##

Provenance & Evidence