2-(4-Bromophenoxy)tetrahydro-2H-pyran → 4-(11-Hydroxyundecyl)phenol

Participants

Reaction Steps

0.4 g of CuCl and 29 g of 11-(tetrahydropyran-2-yloxy)-1-bromoundecane (B) were added to a filtered solution of 4-(tetrahydropyran-2-yloxy)phenyl magnesium bromide (A), prepared from 20.0 g of 4-(tetrahydropyran-2-yloxy)-1-bromobenzene and 3.16 g of magnesium, in 100 ml of tetrahydrofuran. After refluxing for 2 days, the reaction mixture was mixed with 100 ml of diethyl ether, followed by extraction with 100 ml of a saturated NH4Cl solution. After evaporation, the intermediate product C was refluxed for one hour with 40 ml of methanol and 1 ml of saturated hydrochloric acid. 15 ml of a saturated solution of NaHCO3 was added and the methanol was evaporated. 100 ml of diethyl ether was added. 7.4 g of 4-(11-hydroxyundecyl)phenol (D, 36%) was obtained after extraction with 50 ml of saturated sodium chloride, drying over magnesium sulphate, evaporation and recrystallisation from toluene.

Provenance & Evidence