1,4-Dibromobutane → N-(4-Bromo-butyl)-2-(4-fluoro-phenylsulfanyl)-N-trityloxy-acetamide

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-(4-fluoro-phenylsulfanyl)-N-trityloxy-acetamide (132.1 mg, 0.228 mmol) from step C and Cs2CO3 (125.6 mg, 0.385 mmol) in anhydrous DMF (3 mL) was added 1,4-dibromo-butane (0.2 ml, 364.8 mg) in one portion and the resulting solution was warmed to 60° C. After TLC indicated the completion of the reaction (<30 min), the reaction mixture was diluted with EtOAc and washed sequentially with water and saturated NaCl solution. The organic phase was then dried over anhydrous Na2SO4 and concentrated under reduced pressure to give a crude material, which was then used in next step without further purification.

Provenance & Evidence