Hydrochloric Acid → 4,4'-Bis(3-hydroxy-2,2-dimethylpropyl)biphenyl

Participants

Reaction Steps

To a solution of 5.94 g of lithium aluminum hydride in 1500 ml of dry tetrahydrofuran 30 g of 4,4'-bis(2-carbomethoxy-2-methylpropyl)biphenyl was slowly added. The reaction mixture thickened on stirring overnight. Then there was added 150 ml of ethyl acetate, 60 ml of saturated aqueous NH4Cl and 150 ml of concentrated HCl After thorough mixing, the solid and liquid were separated by filtration. The filtrate was evaporated to dryness and the residue recrystallized from benzene to obtain 15 g of 4,4'-bis(3-hydroxy-2,2-dimethylpropyl)biphenyl. The solid from the above filtration was slurried with 50 ml of H2O, 10 ml of concentrated HCl and 50 ml of benzene and the mixture heated at reflux for 1 hr. The benzene layer was separated, dried with MgSO4 at 80° C, filtered hot and then cooled to precipitate an additional 10 g of 4,4'-bis(3-hydroxy-2,2-dimethylpropyl)biphenyl, m.p. 168°-170° C.

Provenance & Evidence