Diethanolamine → Benzenemethanol, 2,4-dichloro-α-methyl-, (αR)-

Participants

Reaction Conditions

Reaction Steps

To a solution of 2′,4′-dichloroacetophenone (10.9 g, 77.0 mmol) in anhydrous THF (80 mL) at −78° C. under nitrogen was slowly added a solution of (+)-B-chlorodiisopinocampheylborane ((+)-Ipc2BCl, 27.2, 85.0 mmol) in THF (15 mL). After the addition is complete, the reaction mixture was slowly warmed to −25° C. and stirred at this temperature for 2 h. The reaction mixture was then quenched with diethanolamine (17.9 g, 170 mmol), and stirred for 10 min. During this time, a solid formed and it was filtered off. The filtrate was dried (Na2SO4), filtered, and concentrated in vacuo. The residue was purified flash chromatography (SiO2, 0-20% ethyl acetate in hexanes) to give (R)-1-(2,4-dichlorophenyl)ethanol (12.0 g, 63.3 mmol, 82%).

Provenance & Evidence