Water → (2S)-2-[(R)-[(4-bromophenyl)-(4-fluorophenyl)-methyl]-amino}-4-methylpentan-1-ol

Participants

Reaction Conditions

Reaction Steps

To a solution of 1,4-dibromobenzene (11.4 g, 48.35 mmol) in ether (120 mL) at −30° C. was added n-butyllithium (24.2 mL, 2.0M cyclohexane solution) over 10 minutes. The reaction mixture was stirred for 45 minutes, whereupon a solution of (S)2-[(4-fluorobenzylidene)-amino]-4-methylpentan-1-ol (maximum 2.16 g, 9.67 mmol from the previous step) in ether (30 mL) was added dropwise. After 2 hours, during which the reaction mixture was allowed to warm to 0° C., water (200 mL) was added. The product was extracted with ethyl acetate (150 mL), washed with brine (100 mL), dried over MgSO4, filtered, concentrated in vacuo, and purified on a short plug of silica gel (20% ethyl acetate/hexane elution) to give (2S)-2-{(R)-[(4-bromophenyl)-(4-fluorophenyl)-methyl]-amino}-4-methylpentan-1-ol.

Provenance & Evidence